• Lead Data Engineer - Python AI Vector PostgresSQL
• Leading Technology AI Brand
• SaaS - Platform based Technology Services
• London/City
• £70-130k salary + equity package

Our client a global technology leader is currently looking for a Senior/Lead Data Engineer to work with the dev team to guide the provision of Software Development for an exciting new AI product.

Key Responsibilities:-

• Architect and build scalable data pipelines and infrastructure
• Design and maintain data ingestion, transformation, and storage architectures for operational and AI workloads.
• Develop and manage batch and Real Time data pipelines.
• Build and optimize systems for vector search, retrieval, and ML data pipelines.
• Ensure data reliability, security, and governance across the platform.
• Collaborate with AI and Back End engineering teams to support training, inference, and product features.
• Implement monitoring, observability, and data quality frameworks.

Core Experience:-

• 7+ years of experience in data engineering or Back End engineering roles.
• Strong experience designing and building data pipelines and distributed data systems.
• Experience working with relational databases (PostgreSQL preferred, but MySQL or similar is acceptable).
• Experience with NoSQL databases.
• Experience with vector databases used in modern AI systems.
• Strong programming experience in Python.

Frameworks/Infrastructure:-

• Apache Spark
• Apache Airflow
• Kafka
• Elasticsearch/OpenSearch

RSSB are now seeking an experienced Principal Technical Lead to drive the hands-on technical delivery of a new greenfield industry services platform. This is an exciting delivery-focused role for a senior engineer who can lead by doing: making confident technical decisions, setting the quality bar, and guiding a multi-disciplinary sprint team to build and ship a complex system.

As Principal Technical Lead, you will deliver a suite of capabilities including workflow automation, document management, scheduling optimisation, real-time notifications, and integrated reporting. A range of internal and external systems including CRM, ERP, payment, and document signing services will be integrated. The close date of this role is 24th May 2026.

When applying, please keep your CV to a maximum of three pages. As part of the application, we’ll also ask you to answer one short application question (up to 200 words).

Responsibilities:

• Own the technical delivery of the platform, ensuring the team consistently ships high-quality, production-ready increments.
• Ensure engineering standards are followed across the team: coding conventions, API design, security practices, and code review processes.
• Lead estimation, sprint planning, and decomposition of technical work; proactively identify and manage technical risk, dependencies, and blockers.
• Collaborate with the Delivery Manager and Product Owner to shape the backlog.
• Contribute directly to the codebase. Particularly on complex features, integration points, and technically critical components. Setting the standard for others to follow.
• Ensure alignment with the solution architecture function, clearly articulating technical constraints, risks, or emerging complexity with architectural implications, supported by evidence and proposed alternatives.
• Ensure application of secure-by-design principles and validate and refine Figma wireframes.
• Represent the team’s technical work clearly and credibly to non-technical audiences.
• Define and enforce CI/CD pipeline standards using Azure DevOps, including branch strategy, build validation, deployment gates, and environment promotion.

Qualifications:

• Proven experience as a technical lead on a complex, multi-service platform, with direct responsibility for technical delivery quality and team output.
• Extensive C# and ASP.NET Core experience, including RESTful APIs, dependency injection, domain modelling, integration patterns, and performance considerations. Experience with Entity Framework Core code-first migrations and data modelling.
• Strong front-end engineering skills in React and TypeScript, including component architecture, state management, and integration with REST/SignalR backends.
• Solid understanding of event-driven architectures.
• Hands-on experience with PostgreSQL or comparable relational databases.
• Experience with API and application security.
• Practical knowledge of Python, including frameworks such as FastAPI.
• Practical knowledge of the Java stack.
• Proven experience with deploying and managing Azure cloud services.
• Experience deploying and operating containerised workloads in Kubernetes.
• Experience writing and maintaining CI/CD pipelines in Azure DevOps.
• Engagement with novel technology, such as AI, to maximise output.
• Experience collaborating with UX designers — reviewing wireframes and providing technical feedback.
• Agile delivery experience, including sprint planning, backlog refinement, estimation, and working productively with a Product Owner and Delivery Manager.
• Experience integrating with payment platforms (e.g. Stripe) and electronic signature services (e.g. DocuSign).
• Experience developing solutions within a regulated industry.
• Communicate effectively and share thoughts and ideas through methods appropriate to the audience.

Application guidance: CVs should be no longer than three pages, and applicants will be asked to answer one 200‑word application question.

Why Join RSSB?

We offer a competitive salary aligned to the public‑interest and not‑for‑profit sector, together with a strong total reward package. While this role is not positioned at top‑end technology salary levels, we believe our overall offer provides meaningful value through flexibility, benefits, and long‑term development. Our benefits package includes:

• 30 days annual leave (plus bank holidays)
• Private medical and dental cover
• Flexible and hybrid working options
• Season ticket loan and travel subsidy
• Cycle to work scheme
• Volunteer leave
• Performance-related bonus
• Pension scheme
• Learning and development opportunities

Ready to Apply?

If you’re ready to take the next step in your career with RSSB, we’d love to hear from you. Apply now and help us shape the future of railway standards.

We value diversity and equal opportunities in employment and are committed to creating a workplace which is inclusive to everyone. As a member of the Disability Confident Scheme, we encourage candidates with disabilities who meet the minimum criteria, to apply for our jobs. If you have applied under the Disability Confident Scheme, please let us know in advance by emailing* vacancies@RSSB.CO.UK Find out more about Diversity and Inclusion at RSSB: Rail Safety and Standards Board Careers - VERCIDA

If you require any reasonable adjustments with respect to our selection process including information in an alternative format, please contact us at vacancies@rssb.co.uk

Play a leading role in migrating and rebuilding our core architecture in Java Spring Boot to align with a composable, cloud-native landscape.

Connector Development: Design and optimize technical connectors for a diverse mix of global channels, including generalist marketplaces, social commerce (eg, TikTok Shop), and quick-commerce (eg, Glovo, Deliveroo).

Catalog Publication Flow: Refocus efforts on rebuilding the catalog publication flow, addressing technical complexities such as category mapping, product variant synchronization, and asynchronous marketplace APIs.

Business Logic Migration: Collaborate on transferring complex Legacy business rules (pricing calculations, stock filtering, and fulfilment decisions) into the dedicated BCP assets to ensure OMC focuses purely on orchestration and connectivity.

System Reliability: Ensure 100% accurate Real Time synchronization of stock and price updates to prevent financial discrepancies and enhance the customer experience

Technical Skills

• Java Spring Boot: Confirmed level proficiency for the architectural rebuild
• Database: PostgreSQL
• Cache: Redis/Valkey
• Architecture: REST Architecture and Event-Driven architecture.
• Cloud & Infrastructure: Google Cloud Platform GCP and Kubernetes clusters

Desirable

Experience with Python to facilitate the transition of Legacy components.

Lead Python Developer Climate Tech

?? London (Hybrid, 3 days per week)

?? Python, FastAPI, PostgreSQL, GCP, Docker

I’m working with a fast-growing climate-tech non-profit tackling one of the most important infrastructure challenges in the energy transition. Backed by some of the biggest names in climate philanthropy, this is a organisation doing real work - not reports, not consultancy, actual software that shapes energy investment decisions globally.

They’re hiring a Lead Backend Engineer to lead a small squad, own the technical direction and get stuck into some genuinely interesting engineering. Think computational complexity, mathematical optimisation, and performance challenges at scale - a long way from your average API job.

? Requirements:

• 7+ years experience developing and maintain scalable Python/FastAPI back-end services
• Ideally worked with high-performance APIs for complex hierarchical data queries and grid modelling computations
• Managed and optimised GCP cloud infrastructure, implementing CI/CD pipelines and infrastructure-as-code
• Lead technical planning by breaking down roadmap items into scoped engineering work, driving ADRs and setting standards for code quality, testing, and API design
• Collaborate cross-functionally with front-end, data engineering, modelling and product teams to deliver reliable, impactful features
• Line-manage a team of 35 engineers through 1:1s, career development, performance reviews, and acting as the first escalation point for technical blockers

If this sounds like something you’d want to hear more about, apply below!

Full Stack Developer / Engineer (Python Django Flutter Go AWS) London to £90k

Are you a full stack technologist who enjoys working on Greenfield apps?

You could be progressing your career at a tech scale-up that are enjoying great success with their AI workforce optimisation software that connects flexible temporary workers (e.g. students) with clients in the hospitality industry, enabling clients to maximise staff in busy times through AI scheduling.

What’s in it for you:

• Salary to £90k
• Stock options
• Private medical care
• Gym and dog friendly office
• Influential role that you can shape as the company grows
• 1-2 days WFH per week

Your role:

As a Full Stack Developer you’ll design and develop new features and enhancements as the company scales from 250,000 users through to millions and transitions from a monolith to microservices architecture.

You’ll work across the full software development lifecycle, taking ownership of Greenfield projects, working with a range of technology from Python and Go on the backend through to Django and Flutter on the frontend within an AWS cloud environment.

Location / WFH:

You’ll join colleagues in the North London office 3-4 days a week where you can enjoy a range of perks including paid for gym and dog friendly office (as well as great bars and restaurants for after work!).

About you:

• You have Full Stack development experience, having worked with Python and Go, as well as Django, Flutter (or React), databases (PostgreSQL) and AWS
• You have a strong understanding of distributed systems and event-driven architectures
• You enjoy working on Greenfield projects in fast paced environments, ideally you will have start-up or scale-up experience
• You’re collaborative, curious and keen to learn new technologies - comfortable working with AI tools such as Claude
• You are degree educated in Computer Science or similar technical discipline, having achieved a 2.1 or above from a top tier university

Apply now to find out more about this Full Stack Developer / Engineer (Python Django Go AWS) opportunity.

Lead Node Developer / Backend Engineer (Node.js Postgres AWS) London / WFH to £100k

Would you like to join a scale-up technology company in an influential role where you can take ownership and see the business impact of what you do?

You could be progressing your career as a Lead Node Developer, working on complex systems for the core product, a financial operating system for live events which reduces queue times for customers and maximises revenue for vendors.

As a Lead Node Developer you’ll architect, design and develop backend services, taking ownership of projects and providing technical leadership within an Agile team environment. You’ll review code and drive best practices, mentoring engineers and ensuring high quality standards.

Location / WFH:

Initially (first 6 months) you’ll be expected to join the team in the London office 3-4 days a week so you can get a full understanding of the product and the team, following this there’s lots of flexibility including the ability to work abroad for part of the year.

About you:

• You have a strong hands-on, backend engineering background with leadership experience
• You have expertise with Node.js combined with strong PostgreSQL database skills
• You have a good knowledge of JavaScript and TypeScript
• You have experience of owning delivery end-to-end in Agile environments
• You have a passion for code quality, reliability and team development
• You have experience of working with cloud platforms (AWS), CI/CD and modern architectures
• You have a strong appreciation of security best practices

What’s in it for you:

• Salary to £100k
• Pension
• Influential role with great career progression as the company scales
• Potential equity

Apply now to find out more about this Lead Node Developer / Backend Engineer (Node.js Postgres AWS) opportunity.

Node Js Developer (AWS/TDD) – Remote Within the UK £70,000-£75,000 It’s an exciting time of expansion for my client as they become a leading player in their field. In response to end user demand, they have innovated their platforms which are going from strength to strength. Recent growth in their commercial pipeline into new industries has led to the platform growing in popularity. As a result, they are looking for engineers to meet the demand Who Should Apply? You have been in cloud development for a while and want to deepen your knowledge around this. You want to understand all aspects of the cloud development including security, scalability, performance, DevOps and serverless. You will also be an advocate of TDD. The production systems run in AWS and Google Cloud using various languages, primarily Node.js and C#. They embrace Linux and cloud-native style architectures for all new work also. You're passionate about software development and understand that it involves a lot more than just writing code. Tech stack includes: · Node.js · AWS/Serverless · Relational Databases (PostgreSQL & SQL Server) · Containers (Docker, Docker Compose, ECS) · Infrastructure as Code (CloudFormation, Terraform) · Scripting (Bash, Make) · Experience with TDD Benefits · Flexible and 100% remote working options (within UK) · 25 days holiday (increasing by one day each January, up to a maximum of 30 days) · £500 per year on learning of your choice · Bonus birthday day off · Regular knowledge sharing talks · Group Life Insurance · Health cash back scheme · Up to 3 days paid each year to do volunteer/charity work

£70,000-£75,000 It’s an exciting time of expansion for my client as they become a leading player in their field. In response to end user demand, they have innovated their platforms which are going from strength to strength. Recent growth in their commercial pipeline into new industries has led to the platform growing in popularity. As a result, they are looking for engineers to meet the demand Who Should Apply? You have been in cloud development for a while and want to deepen your knowledge around this. You want to understand all aspects of the cloud development including security, scalability, performance, DevOps and serverless. You will also be an advocate of TDD. The production systems run in AWS and Google Cloud using various languages, primarily Node.js and C#. They embrace Linux and cloud-native style architectures for all new work also. You're passionate about software development and understand that it involves a lot more than just writing code. Tech stack includes: · Node.js · AWS/Serverless · Relational Databases (PostgreSQL & SQL Server) · Containers (Docker, Docker Compose, ECS) · Infrastructure as Code (CloudFormation, Terraform) · Scripting (Bash, Make) · Experience with TDD Benefits · Flexible and 100% remote working options (within UK) · 25 days holiday (increasing by one day each January, up to a maximum of 30 days) · £500 per year on learning of your choice · Bonus birthday day off · Regular knowledge sharing talks · Group Life Insurance · Health cash back scheme · Up to 3 days paid each year to do volunteer/charity work

6 Months
Remote/London
Market Rate (Inside IR35)

My client, in the Insurance sector is looking for a Flow X Process Engineer to join their fast-paced team on an initial 6 month contract, the ideal candidate will have experience in the Insurance industry.

Flow X Process Engineer: FlowX.AI - Deploy Enterprise-Grade AI Agents in Weeks with FlowX.AI

• Hands-on experience with the Flow X platform
• Extensive experience of similar workflow/low-code tools
• Basic programming skills - Java, JavaScript, Python, Groovy
• Experience in BPMN development
• Good understanding of API testing - REST and SOAP or knowledge of integration protocols (REST - JSON, SOAP - XML)
• Experience working with relational databases (Oracle DB, PostgreSQL)
• Deep consulting/client-facing experience

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited (“ARM”). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change.

6 months
Remote/London
Market Rate (Inside IR35)

My client, in the Insurance sector is looking for a Flow X Process Engineer to join their fast-paced team on an initial 6 month contract, the ideal candidate will have experience in the Insurance industry.

Flow X Process Engineer: FlowX.AI - Deploy Enterprise-Grade AI Agents in Weeks with FlowX.AI

• Hands-on experience with the Flow X platform
• Extensive experience of similar workflow/low-code tools
• Basic programming skills - Java, JavaScript, Python, Groovy
• Experience in BPMN development
• Good understanding of API testing - REST and SOAP or knowledge of integration protocols (REST - JSON, SOAP - XML)
• Experience working with relational databases (Oracle DB, PostgreSQL)
• Deep consulting/client-facing experience

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited (“ARM”). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change.

DV Cleared Backend Developer

Location: UK Wide

Clearance: DV clearance required

Sector: Defence & National Security

Role Summary

Our client is seeking DV cleared Backend Developers to support high impact Defence and Security programmes. You will design, build and operate secure, cloud-native backend services that underpin mission-critical national systems.

This is a hands on engineering role, focused on building robust APIs, services and data driven components within modern cloud and DevSecOps environments. You will work end to end - from shaping technical designs and delivering features through to improving reliability, resilience and performance in live operations.

Key Responsibilities

• Design and build backend services and APIs, delivering features end-to-end in collaboration with cross-functional teams.
• Develop cloud-native and containerised applications using technologies such as Java (Spring Boot), Python (FastAPI), Node.js and modern datastores.
• Build solutions within an Agile and DevSecOps environment, embedding security and quality throughout the delivery lifecycle.
• Integrate backend services into CI/CD pipelines, supporting automated testing and deployment.
• Ensure systems are reliable, resilient and scalable, applying Site Reliability Engineering (SRE) principles.
• Collaborate closely with frontend developers, architects, DevOps engineers and client stakeholders.
• Help clients and users understand technical trade-offs and make informed product decisions.
• Contribute to continuous improvement and engineering best practice across teams.

Required Skills & Experience

• DV security clearance is essential.
• Proven experience as a backend or software engineer delivering production systems.
• Strong coding ability in Java, Python and/or JavaScript/TypeScript.
• Solid understanding of backend engineering fundamentals, design patterns and API design.
• Experience working in Agile teams (e.g. Scrum, Kanban).
• Strong communication skills and a collaborative mindset.

Cloud & Engineering

• Experience building backend services on cloud platforms (AWS preferred).
• Familiarity with microservices and containerisation.
• Experience with DevSecOps tooling (e.g. GitLab, Jenkins, Atlassian).
• Understanding of security best practices and OWASP principles.
• Experience with relational and NoSQL databases (e.g. PostgreSQL, Oracle, MongoDB) is beneficial.

Up to £425 per day - Inside IR35

London / Primarily Remote

6 months

My client is an instantly recognisable consultancy who require 2 DevOps Engineers with Active SC Clearance for an end client within the Public Sector.Key Requirements:

• Proven commercial experience working as a DevOps Engineer within the Public Sector.
• Active SC Clearance.
• Strong experience with Linux (RHEL/Ubuntu), AWS, and high-availability Kubernetes environments (EKS/RKE) including load balancing and multi-site failover.
• Proficient in containerisation and orchestration using Docker, Kubernetes, and Helm.
• Skilled in IaC and automation with Terraform, Ansible, and supporting cloud-native platform modernisation.
• Hands-on with CI/CD pipelines (GitLab CI), Git version control, and automated delivery practices.
• Experienced with monitoring and observability tooling such as Prometheus and Grafana.
• Knowledge of data and streaming technologies including Kafka, MongoDB, MySQL, and PostgreSQL, plus PKI, secrets management, and IAM.
• Excellent communication skills.

Nice to have:

• Puppet, KeyCloak, Vault, and experience supporting microservice architectures.
• Immediate availability.

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C’s, Privacy Policy and Disclaimers which can be found at hays.co.uk

London base / FULLY ONSITE

We’re working with a client delivering a major security-focused programme of work, with a strong emphasis on Active Directory and Identity Security at an enterprise level. They’re looking for a seasoned Security Consultant who can operate confidently in complex environments and engage effectively with both technical teams and stakeholders.

This role is ideal for someone who combines strong technical breadth with a consultative mindset—someone who can get into the detail when needed, but also guide, influence, and delegate to SMEs across specialist areas.

The Role

You’ll play a key role in assessing, improving, and guiding security practices across enterprise environments, with a particular focus on Active Directory and identity-related controls.

You’ll be expected to:

• Engage directly with clients, both written and face-to-face, with credibility and clarity
• Take ownership of workstreams—being proactive, thorough, and investigative in your approach
• Operate across a broad technical landscape, pulling in specialist expertise where required
• Contribute to the design, assessment, and improvement of security controls across identity and infrastructure

What We’re Looking For

Core Requirements

• Strong experience with Active Directory in enterprise environments
• Solid background in Identity Security and related domains
• Confident communicator, able to engage effectively with clients and stakeholders
• Self-starting, curious, and detail-oriented with a “get it done” mindset

Technical Experience

We’re not expecting someone to tick every box, but a broad spread of experience across several of the below is important:

• Identity & Access Management (IAM), Identity Governance & Administration (IGA)
• Directory Services (Active Directory, LDAP, etc.)
• Windows and/or *nix environments
• Scripting (e.g. PowerShell, Python, Bash)
• Databases (Oracle, MSSQL, MySQL, PostgreSQL)
• Web technologies (Apache, IIS, etc.)
• DevOps and software development practices
• Application integration
• Reporting and data analysis

Solutions Architect - London Job Title: Solutions Architect Salary: Paying up to £85,000 per annum Location: Wembley London - 5 days on-site Are you a hands-on technical leader with a passion for creating innovative technology solutions? Our client, a well-established and diversified multinational organisation, is seeking a Solutions Architect to join their team. Skills Experience: Solution Architecture with a clear focus on E-commerce platforms or API/Middleware ecosystems.
Technical Stack: Expert-level knowledge of Node.js, Java (Spring Boot), and PostgreSQL - able to read and critique vendor code, not just high-level diagrams.
Integration Expert: Deep proficiency in API management patterns, Webhook integrations, and Event-Driven Architecture using Kafka or Azure Event Hubs.
Legacy-to-Cloud: Demonstrable experience migrating legacy monolithic systems into containerised microservices architectures.
Tooling: Proficient in Visio or LucidChart for architectural modelling; disciplined in Confluence for documentation practices.Duties Blueprint Delivery: Develop high-quality High-Level Designs (HLDs) and Low-Level Designs (LLDs) for DTS, EPOS, and other strategic workstreams - to a standard that external vendors are contractually required to match.
Vendor Governance: Conduct structured audits of vendor-submitted code and architecture. Enforce ‘Stable-by-Design’ framework, ensuring external deliverables meet internal quality, security, and scalability thresholds.
Data Integration Leadership: Orchestrate complex data mapping between legacy IBM iSeries (DB2/RPG) systems and modern API middleware - a technically demanding challenge requiring deep integration expertise.
Systemic Remediation: Lead deep-dive investigations into recurring platform failures error surges, latency anomalies, and data inconsistencies - and deliver long-term structural remediation, not tactical patches.
Technical Documentation: Maintain high-quality architecture documentation in Confluence, ensuring designs are versioned, accessible, and transferable to operational teams

We are seeking an experienced Database Administrator to support critical services within a complex environment, ensuring the integrity, availability, performance, and security of data across highly regulated justice systems.

This role operates within a live service environment where reliability, auditability, and data protection are paramount. You will work across BAU support (AMS/3rd Line ) and change delivery (Product teams), ensuring databases are resilient, compliant, and optimised to support operational case working systems.

You will play a key role in supporting PostgreSQL (Azure Flexible Server) estates, contributing to performance tuning, incident resolution, data governance, and the evolution of reporting and analytics capabilities (including Microsoft Fabric).

Key Responsibilities

Database Operations & Live Service Support

• Manage and maintain PostgreSQL databases (Azure Flexible Server)

• Provide BAU support (2nd/3rd line) for production incidents, including performance degradation, outages, and data issues

• Ensure high levels of availability, resilience, and operational stability across all environments (Dev, SIT, NFT, Prod)

• Support release activities, validating database changes and ensuring safe deployment into live service

Performance, Monitoring & Optimisation

• Monitor database performance using tools such as Dynatrace and native Azure monitoring

• Diagnose and resolve performance bottlenecks (queries, indexing, storage, connection limits)

• Tune SQL queries and optimise schema design for high-volume transactional systems

• Support capacity planning and scaling for large datasets (including JSONB-heavy workloads)

Security, Compliance & Data Governance

• Implement and manage access controls, roles, and permissions, aligning with Government security policies

Ensure compliance with:

• UK GDPR/Data Protection Act 2018 (Law Enforcement Processing)

• Cross Government security standards and retention policies

• Support audit and forensic analysis by ensuring data traceability and integrity

• Work with security and architecture teams to reduce over- permissioning and role sprawl

Backup, Recovery & High Availability

• Design and maintain backup and recovery strategies (PITR, snapshots, geo-redundancy)

• Support disaster recovery planning and testing

• Implement and maintain high availability patterns (replication, failover)

Cloud & Platform Engineering

• Manage and optimise databases hosted in Microsoft Azure (PostgreSQL Flexible Server)

• Support infrastructure-as-code deployments using Terraform

• Contribute to cost optimisation and efficient resource utilisation

• Troubleshoot platform-level issues (extensions, replication, CDC, permissions)

Data & Reporting Integration

• Support integration of operational data into analytics platforms such as.*Microsoft Fabric

• Assist with ingestion patterns (CDC, event-based, batch)

• Work with data engineers to structure data for reporting and audit use cases

• Address challenges with semi-structured data ( eg JSON/JSONB fields)

Development Support & Collaboration

• Collaborate with engineering teams on:

• Database design and schema evolution

• Query optimisation

• Data modelling for services and reporting

• Support CI/CD pipelines and automated database deployments

• Provide guidance on best practices for database usage within microservices

Essential Skills & Experience

Technical

• Strong experience with PostgreSQL, including:

• Performance tuning

• Indexing strategies

• Query optimisation

• JSON/JSONB handling

• Experience with Azure PostgreSQL Flexible Server

• Proficiency in SQL and database troubleshooting

• Experience with Terraform or similar IaC tooling

• Understanding of:

• Backup and recovery strategies

• High availability and replication

• Database security and access control

Operational & Analytical

• Experience working in live service/production support environments

• Strong problem-solving and root cause analysis skills

• Ability to diagnose complex issues across application and database layers

Collaboration & Communication

• Ability to work across:

• Product teams

• Support teams (AMS/3rd line)

• Architecture and security functions

• Strong stakeholder communication, including explaining technical issues to non-technical audiences

Desirable Skills

• Experience with Microsoft Fabric or modern data platforms

• Familiarity with observability tooling such as Dynatrace

• Experience working within UK Government environments

Knowledge of:

• CDC/data streaming patterns

• Event-driven architectures

• Audit and forensic data analysis

Security & Clearance

Due to the nature of the work, candidates must be eligible for Security Check (SC) clearance .

Senior Backend Engineer (Security Compliance) - 100% Remote

The RoleJoin a high-autonomy team as a senior contractor architecting the next generation of our security compliance platform. You will own technical decisions end-to-end, building systems that ensure every production code change meets regulatory standards across thousands of repositories

What You’ll Do

• Architect & Build: Develop Java-based backend services (Spring Boot, Apollo) to enforce compliance controls within a GitHub Enterprise environment.
• Must have Skillset: Java, Springboot, GCP, GKE

Who You Are

• Expert Developer: Java experience (Spring Boot, Bazel, Maven) with a focus on distributed services and Kubernetes (GKE).
• System Designer: Strong skills in API design (gRPC, GraphQL, REST) and relational databases like PostgreSQL.
• Cloud Proficient: Hands-on experience with GCP services, including BigQuery and Cloud SQL.
• Security Minded: Experience with (or strong interest in) security compliance engineering and ITGC/SOX frameworks.
• Independent: High autonomy; comfortable owning significant workstreams in a monorepo environment with minimal guidance.

Requirements

• Location: 100% Remote.
• Background: A criminal check is required for this position.

If intersted, please apply here or share your updated CV to

Randstad Technologies is acting as an Employment Business in relation to this vacancy.

We’re seeking a UK-based PHP Full Stack Software Engineer to support the continued growth of our sustainability and digital learning platforms. You’ll be a hands-on developer who enjoys building modern, responsive user experiences, writing clean, scalable code, and collaborating closely with designers and cross-functional teams. This is an opportunity to contribute to platforms that deliver meaningful impact at scale, improving the learning experience for thousands of users. The Role at a Glance: PHP Full Stack Software Engineer Old Street, London / Hybrid Working / 1 day a week in the office £70,000 - £80,000 Plus fantastic benefits: 8% employer pension contribution, mental health support, fitness allowance, enhanced maternity/paternity pay, volunteer days, and more… Permanent - Full Time Product / Service: Sustainability Consultancy; Training & Events Culture: Close knit, small and agile company, flat hierarchy, direct communication with director and hiring managers alike Heads-Up – We really value a short intro covering note :-) Closing Date: 22nd May Who we are: Action Sustainability is a leading consultancy with the aim of inspiring sustainable business. Our team comprises 60+ full and part-time employees and associates. Many of our clients are sector leaders on sustainability and supply chain issues, and we are proud of our reputation for leading the thinking in this area. Action Sustainability drives lasting change through innovative technology, expert advisory, and award-winning learning solutions. We partner with leading organisations, including the NHS and Houses of Parliament, to create measurable impact across industries. An accredited Living Wage employer, we’ve been recognised by Best Companies with a 'One to Watch' status for our commitment to an outstanding workplace. About the Role: This is a hands-on development role focused on delivering high-quality front-end experiences alongside robust PHP-based functionality. You’ll work closely with designers and stakeholders to bring user experiences to life, while contributing to the ongoing development and optimisation of our Moodle-based platforms. We make extensive use of AI-assisted development tools and are continuing to expand this across the team, so you’ll play a part in shaping how these are used effectively. Key Responsibilities: You will collaborate with designers to translate detailed front-end specifications into high-quality web pages, building modern, responsive interfaces that enhance user experience. You will write clean, reusable code across both front-end and PHP components, while contributing to code reviews and supporting other developers where needed. You will take ownership of software quality, ensuring best practices are followed across development, testing, and performance optimisation, including writing and maintaining unit and Behat tests. System Management & Support: You will troubleshoot issues and optimise applications to ensure performance, scalability, and reliability across platforms. You will ensure systems meet accessibility standards, GDPR requirements, and data protection best practices, while supporting QA processes and maintaining data integrity. Collaboration & Stakeholder Management: You will work as part of a cross-functional team alongside engineers, product designers, and product managers, contributing to all stages of the agile development lifecycle. You will engage with wider stakeholders including Learning Technologists, Sustainability Consultants, and Designers, providing technical guidance and translating requirements into effective solutions. Continuous Improvement: You will stay up to date with modern front-end technologies, particularly HTML, CSS, and JavaScript, and proactively suggest improvements to user experience and development practices. You will contribute to the evolution of AI-assisted development within the team, helping to identify opportunities for efficiency and quality improvements. Essential Requirements: You must have UK work authorisation and strong English communication skills, alongside 3–5 years of commercial front-end development experience. You’ll bring strong technical capability across HTML, CSS3, and JavaScript, with experience working with relational databases such as MySQL or PostgreSQL, and confidence using Git for version control. Experience with Bootstrap, Ajax, and jQuery is important, alongside a solid understanding of writing optimised, maintainable code. Professional Skills: You are a strong problem-solver who can optimise code and troubleshoot effectively. You communicate clearly, work well with others, and are comfortable managing multiple priorities in a collaborative environment. Desirable Skills: Experience with Moodle would be highly beneficial, along with familiarity with Docker, cloud platforms, CI/CD pipelines, and Linux environments. Knowledge of authentication protocols, WordPress, or additional programming languages would be advantageous, as would any exposure to AI-assisted coding tools or project management practices. What’s on Offer: • A competitive salary of £70,000 - £80,000 • 25 days + 8 statutory holidays, plus an extra day for your birthday • Hybrid working • 8% employer pension contribution • Profit share scheme and discretionary bonus • Fitness allowance • Enhanced maternity/paternity pay and childcare schemes • Access to our vibrant Old Street office with lounge, café bar, gym, and rooftop terrace • Ongoing professional development tailored to your career goals Apply today and be part of a team using technology to drive real-world sustainability impact. Application notice... We take your privacy seriously. As you might expect you may be contacted by email, text or telephone. Your data is processed by our talent partner RR (Recruitment Revolution) on the basis of their legitimate interests in fulfilling the recruitment process. Please refer to their Data Privacy Policy & Notice on their website for further details.

Senior Kotlin Engineer Ncounter is supporting a leading organisation within the publishing and media space as they look to strengthen their backend engineering capability. This team is responsible for building and evolving platforms that aggregate, process and distribute large-scale editorial and content datasets, enabling internal teams and external partners to access high-quality, structured information in near real time. You will join a highly capable engineering function focused on delivering scalable backend services, working across API development and Kotlin-based microservices that power content ingestion, indexing and distribution workflows. The environment is data intensive, with a strong emphasis on performance, reliability and clean service design across a modern cloud architecture. Key requirements: • 3-4 years commercial experience with Kotlin, or strong Java (8/11) with a desire to transition • 7+ years working across JVM-based backend development • Strong experience with Spring Boot and building RESTful or GraphQL services • Solid understanding of relational databases such as PostgreSQL or MySQL • Experience working within BDD or TDD environments, alongside CI/CD tooling such as CircleCI • Exposure to AWS services including Lambda, DynamoDB, SQS, RDS and CloudWatch, alongside infrastructure as code tools such as Terraform • Familiarity with ORM frameworks such as Hibernate or JOOQ This role will see you take ownership of key backend components within a wider content and publishing platform, contributing to the development of new services and improving existing systems that manage complex data pipelines. You will work closely with other engineers, product stakeholders and data specialists to ensure content is processed efficiently and made accessible in a consistent, scalable way. The team places strong value on engineering best practice, collaboration and continuous improvement, offering an environment where you can have a genuine impact on the direction of the platform and the evolution of its architecture. If you are interested in building robust backend systems within a data-driven publishing environment, please get in touch to discuss further.

Are you a Software Engineer with a passion for AI and building scalable systems from the ground up? This is a rare opportunity to join as an early member, shaping both the technology and the engineering of an ambitious product!

The RoleAs a Senior Software Engineer, you’ll play a pivotal role in designing and delivering a modern, AI-driven platform. Your work will span multiple areas, from developing intelligent systems and data pipelines to contributing to scalable SaaS infrastructure. You’ll help define architecture, improve developer workflows, and ensure systems are robust, secure, and production-ready.

This role offers the chance to take ownership, influence technical direction, and build systems designed to scale rapidly.

The CompanyThis company is focused on building a high-growth, technology-led product with a strong emphasis on engineering efficiency and quality. They prioritise smart tooling, fast iteration, and reliable delivery, enabling a lean team to achieve significant impact. Engineers are empowered to shape both the product and the processes that support it.

This role is based in London.

What’s Required?The ideal candidate for the role will have the following:

• Strong software engineering fundamentals, with the ability to design and deliver production-ready systems
• Familiarity with modern technologies such as Python, TypeScript, React, and PostgreSQL
• Experience with AI engineering, data engineering, and cloud-based SaaS infrastructure are all highly beneficial
• A proactive, solution-focused mindset, with the ability to take ownership of problems and design effective solutions
• Experience in regulated or data-intensive industries would be a big plus!

Apply now to help build and scale an AI-driven platform from an early stage where you will have real ownership and impact!

Senior Software Developer, AI Engineering, London, COR7550

Corriculo Ltd acts as an employment agency and an employment business. #JC #ChannelA

We re seeking a UK-based PHP Full Stack Software Engineer to support the continued growth of our sustainability and digital learning platforms.

You ll be a hands-on developer who enjoys building modern, responsive user experiences, writing clean, scalable code, and collaborating closely with designers and cross-functional teams.

This is an opportunity to contribute to platforms that deliver meaningful impact at scale, improving the learning experience for thousands of users.

The Role at a Glance:

PHP Full Stack Software Engineer
Old Street, London / Hybrid Working / 1 day a week in the office
£70,000 - £80,000
Plus fantastic benefits: 8% employer pension contribution, mental health support, fitness allowance, enhanced maternity/paternity pay, volunteer days, and more
Permanent - Full Time

Product / Service: Sustainability Consultancy; Training & Events

Culture: Close knit, small and agile company, flat hierarchy, direct communication with director and hiring managers alike

Heads-Up We really value a short intro covering note :-)

Closing Date: 22nd May

Who we are:

Action Sustainability is a leading consultancy with the aim of inspiring sustainable business.

Our team comprises 60+ full and part-time employees and associates. Many of our clients are sector leaders on sustainability and supply chain issues, and we are proud of our reputation for leading the thinking in this area.

Action Sustainability drives lasting change through innovative technology, expert advisory, and award-winning learning solutions. We partner with leading organisations, including the NHS and Houses of Parliament, to create measurable impact across industries.

An accredited Living Wage employer, we ve been recognised by Best Companies with a ‘One to Watch’ status for our commitment to an outstanding workplace. We prioritise wellbeing, offer clear development pathways, and create an environment where people can grow both personally and professionally.

About the Role:

This is a hands-on development role focused on delivering high-quality front-end experiences alongside robust PHP-based functionality.

You ll work closely with designers and stakeholders to bring user experiences to life, while contributing to the ongoing development and optimisation of our Moodle-based platforms. We make extensive use of AI-assisted development tools and are continuing to expand this across the team, so you ll play a part in shaping how these are used effectively.

Key Responsibilities:

You will collaborate with designers to translate detailed front-end specifications into high-quality web pages, building modern, responsive interfaces that enhance user experience.

You will write clean, reusable code across both front-end and PHP components, while contributing to code reviews and supporting other developers where needed.

You will take ownership of software quality, ensuring best practices are followed across development, testing, and performance optimisation, including writing and maintaining unit and Behat tests.

System Management & Support:

You will troubleshoot issues and optimise applications to ensure performance, scalability, and reliability across platforms.

You will ensure systems meet accessibility standards, GDPR requirements, and data protection best practices, while supporting QA processes and maintaining data integrity.

Collaboration & Stakeholder Management:

You will work as part of a cross-functional team alongside engineers, product designers, and product managers, contributing to all stages of the agile development lifecycle.

You will engage with wider stakeholders including Learning Technologists, Sustainability Consultants, and Designers, providing technical guidance and translating requirements into effective solutions.

Continuous Improvement:

You will stay up to date with modern front-end technologies, particularly HTML, CSS, and JavaScript, and proactively suggest improvements to user experience and development practices.

You will contribute to the evolution of AI-assisted development within the team, helping to identify opportunities for efficiency and quality improvements.

Essential Requirements:

You must have UK work authorisation and strong English communication skills, alongside 3 5 years of commercial front-end development experience.

You ll bring strong technical capability across HTML, CSS3, and JavaScript, with experience working with relational databases such as MySQL or PostgreSQL, and confidence using Git for version control.

Experience with Bootstrap, Ajax, and jQuery is important, alongside a solid understanding of writing optimised, maintainable code.

Professional Skills:

You are a strong problem-solver who can optimise code and troubleshoot effectively.

You communicate clearly, work well with others, and are comfortable managing multiple priorities in a collaborative environment.

Desirable Skills:

Experience with Moodle would be highly beneficial, along with familiarity with Docker, cloud platforms, CI/CD pipelines, and Linux environments.

Knowledge of authentication protocols, WordPress, or additional programming languages would be advantageous, as would any exposure to AI-assisted coding tools or project management practices.

What s on Offer:

• A competitive salary of £70,000 - £80,000
• 25 days + 8 statutory holidays, plus an extra day for your birthday
• Hybrid working
• 8% employer pension contribution
• Profit share scheme and discretionary bonus
• Fitness allowance
• Enhanced maternity/paternity pay and childcare schemes
• Volunteer days
• Access to our vibrant Old Street office with lounge, café bar, gym, and rooftop terrace
• Ongoing professional development tailored to your career goals

Apply today and be part of a team using technology to drive real-world sustainability impact.

Application notice We take your privacy seriously. As you might expect you may be contacted by email, text or telephone. Your data is processed by our talent partner RR (Recruitment Revolution) on the basis of their legitimate interests in fulfilling the recruitment process. Please refer to their Data Privacy Policy & Notice on their website for further details.

Senior Backend Engineer

Location: London

Work Type: On-site

Company Description

We are a rapidly growing consumer technology company operating at the intersection of AI, aesthetics, and digital experiences. With a global community of millions, we are building innovative AI-driven products that are transforming how users engage with and understand visual data.

Our offerings range from consumer-facing AI analysis tools to partnerships with leading global brands. As we scale quickly, we are expanding our team and pushing the boundaries of how technology and user experience come together.

Role Description

We are seeking a talented Senior Backend Engineer to join our London-based team full-time. You will play a key role in building and scaling the core infrastructure of our AI platform, owning critical backend systems, and supporting rapid product growth.

This is a high-impact, fast-paced role with significant autonomy, where your work will directly influence product direction and user experience.

Key Responsibilities

• Design and implement backend services and APIs using Python, FastAPI, and Django
• Build and maintain scalable RESTful APIs with PostgreSQL
• Develop and integrate AI/LLM-powered features using frameworks such as LangChain
• Implement and manage payment systems, including Stripe integrations and subscription flows
• Build image processing and computer vision pipelines
• Write clean, maintainable, and well-documented code deployed via Docker and CI/CD pipelines
• Collaborate using GitHub, maintaining high code quality and team standards
• Work with BaaS platforms (e.g., Supabase) for authentication, storage, and real-time functionality
• Ensure performance, scalability, and security best practices
• Collaborate cross-functionally with Product, Design, and Frontend teams
• Contribute to architectural decisions and mentor other engineers
• Develop data-driven backend services and pipelines
• Support production systems and deployments within a small, high-performing team

Qualifications

• 5+ years of professional software engineering experience
• Strong Python expertise with backend development experience
• Proven experience with FastAPI and/or Django, REST APIs, and PostgreSQL
• Experience integrating Stripe for payments and subscriptions
• Familiarity with image processing and computer vision
• Experience with Docker, GitHub, and modern deployment workflows
• Knowledge of cloud platforms (AWS, GCP, or Azure)
• Strong understanding of software design principles (SOLID, patterns, clean code)
• Experience with BaaS platforms such as Supabase or Firebase
• Ability to thrive in fast-paced, high-ownership environments

Nice to Have

• Experience with LLM APIs (e.g., OpenAI, Anthropic, Gemini) and LangChain
• Background in AI/ML (e.g., generative models, GANs, diffusion, regression)
• Experience building data pipelines and data-driven systems
• Familiarity with workflow orchestration tools (e.g., Temporal, Prefect)

Why Join

• Be part of a fast-growing company in the AI and consumer tech space
• High ownership and autonomy over technical decisions
• Work closely with founders and a mission-driven team
• Strong market traction and growth potential
• Opportunity to shape a rapidly evolving industry