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.

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Role/Job title: Enterprise architect Work Location: London, Bristol or Edinburgh Role type: Contract (Inside IR35) Mode of working: Hybrid /Office based Number of positions: 2 Our client a major retail and commercial bank is currently looking for an Enterprise Cloud & Data Architect to be responsible for defining and delivering enterprise-wide cloud and data architecture strategies, ensuring alignment with business objectives, regulatory requirements, and technology roadmaps. The role provides thought leadership in modernising the technology landscape, driving scalable, secure, and resilient cloud and data platforms Required Skills & Experience: Core Skills: \* Strong experience in Enterprise Architecture / Cloud Architecture / Data Architecture \* Proven ability to define architecture strategies and roadmaps \* Experience with modern cloud-native and data platforms Technical Expertise: \* Cloud platforms: Azure / AWS / GCP \* Data technologies: \* Data Lakes, Lakehouse, Data Mesh \* ETL/ELT pipelines, streaming (Kafka, Spark) \* Architecture patterns: \* Microservices, APIs, event-driven design \* Understanding of data governance, security, and compliance Key Responsibilities: 1. Enterprise Architecture & Strategy \* Define and drive enterprise cloud and data architecture strategy and roadmaps \* Ensure alignment with business strategy, platform objectives, and regulatory requirements \* Provide technical leadership and governance across programmes and platforms 2. Cloud Architecture & Modernisation \* Design and implement cloud-native architectures (Azure / AWS / GCP) \* Define: \* Cloud migration strategies \* Hybrid/multi-cloud patterns \* Scalability, resilience, and security frameworks \* Drive adoption of microservices, APIs, and event-driven architecture 3. Data Architecture & Engineering \* Define enterprise data architecture frameworks (e.g., Data Mesh, Lakehouse, Data Fabric) 4. Governance & Standards 5. Stakeholder Collaboration 6. Innovation & Continuous Improvement This is an excellent opportunity to join a major British retail and commercial bank that operates independently, focusing on digital banking, mortgages, and personal accounts. Forward your CV Now to be considered

Full Stack Engineer / Developer (C# .Net Core JavaScript AWS) St Albans / WFH to £100k

Opportunity to progress your career in a hands-on role at a technology driven trading company that invest in Sports betting markets, with a flat structure where you will get your voice heard and can make a real impact on the bottom line, earning significant bonuses.

What’s in it for you:

As a Full Stack Engineer / Developer you will earn a competitive package:

• Salary to £100k
• Bonus
• 25 days holiday, rising to 30 after 2 years
• Enhanced parental leave
• Contributory pension scheme
• Private Medical
• MSDN subscription
• Discounts for gym membership, travel and cinema
• Sabbatical after 10 years of service
• Flexible working with 2 days work from home per week in a hybrid model

Your role:

As a Full Stack Engineer you’ll join an Agile development team to design and develop new features and enhancements to complex Payments and client systems within a microservices environment (300 services). You’ll be working with a modern tech stack using C# .Net Core, AWS, Kubernetes, Kafka, Redis and TypeScript / Angular; using the right tool for the job, you’ll be able to pick up new technologies and make recommendations for improvements.

Location / WFH:

You’ll join colleagues in St. Albans, Hertfordshire (parking available), 10 minute walk from local station, with the flexibility to work from home twice a week.

About you:

• You have strong C# .Net Core backend development skills
• You have JavaScript experience, combined with Angular or React
• You have experience with AWS and microservices
• You have a thorough understanding of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms
• You enjoy collaborating, learning new things and sharing knowledge
• You are degree educated in Computer Science or closely related discipline

Apply now to find out more about this Full Stack Engineer / Developer (C# .Net Core JavaScript) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Job Title: Senior .NET Software Engineer
Location: Hybrid - 1 - 2 days per month in Leeds
Salary: Up to £90K + Bonus + Excellent Benefits

Why Apply?

This is an excellent opportunity for a passionate and experienced Senior Software Engineer to make a meaningful impact in a fast-growing, technology-led company based in central London. You’ll contribute to high-quality software solutions within a collaborative environment that values creativity, performance, and continuous improvement.

Software Engineer Responsibilities

• Design and deliver scalable, maintainable, and robust software solutions aligned with engineering best practices
• Collaborate closely with your team and stakeholders to solve complex technical problems
• Review code and provide constructive feedback to support clean, efficient, and reliable software delivery
• Actively participate in removing technical blockers to help your team deliver at pace
• Analyse requirements and dependencies, estimating effort and risk where necessary
• Write high-quality code using C# and .NET 8, supported by thorough unit testing
• Ensure high standards of observability, operational excellence, and software performance
• Engage in continuous improvement by evaluating new tools, technologies, and methodologies
• Contribute to knowledge sharing across teams and support preparation of releases

Software Engineer Requirements

• 5+ years of professional software engineering experience
• Strong technical background with a degree in Computer Science, Software Engineering or equivalent practical experience
• Proficiency in C#, .NET 8/9 and object-oriented design principles
• Experience developing microservices and RESTful APIs with tools like Redis, Kafka, and MySQL
• Familiarity with Docker and Kubernetes for containerisation and orchestration
• Experience working with Git, versioning practices, and CI/CD workflows
• Strong unit testing and mocking skills for maintaining code quality
• Excellent time management and a pragmatic, solution-focused mindset

What’s in it for me?

• Competitive salary, bonus and benefits package
• Flexible working model
• Choice of private medical insurance
• Corporate gym membership
• Supportive team culture focused on collaboration and innovation
• Career progression pathways and ongoing professional development
• Involvement in cutting-edge technology and product development

We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age.

Senior AI Engineer Location: UK Remote (UK-based candidates only) Salary: £60,000 - £70,000 Employment Type: Full-Time Please note: Sponsorship is not available for this position. Overview A growing organisation is looking for a Senior AI Engineer to help design, build, and scale production-grade AI systems and data platforms used across enterprise environments. This is an opportunity to join a collaborative engineering function focused on building robust AI pipelines, transformation APIs, and scalable backend services that support advanced analytics and machine learning products. The Role As a Senior AI Engineer, you will work closely with Data Scientists and cross-functional technical teams to productionise machine learning models and develop high-performance AI services. You’ll contribute across the full engineering lifecycle-from system design and integration through to deployment, monitoring, and optimisation within cloud-native environments. Key Responsibilities Design and maintain scalable AI pipelines and processing workflows
Develop and optimise RESTful APIs and microservices for AI services
Build cloud-native backend systems aligned with best engineering practices
Collaborate with Data Scientists to productionise ML models
Improve system performance, observability, reliability, and security
Contribute to CI/CD pipelines, automated testing, and infrastructure automation
Support integration and interoperability across enterprise platforms
Translate technical requirements into scalable, maintainable solutions Required Skills & Experience Strong experience in backend, data, or ML engineering
Advanced Python skills and experience with FastAPI, Flask, or Django
Experience building scalable APIs and microservices
Strong SQL and relational database knowledge (PostgreSQL preferred)
Experience with AWS and/or Azure cloud environments
Understanding of distributed systems and scalable architectures
Exposure to machine learning, NLP, or AI-driven systems
Experience with CI/CD pipelines, testing, and containerisation
Strong problem-solving and communication skills Technology Stack Python, SQL, FastAPI, PyTorch, Transformers/LLMs, Terraform, Databricks, Kubernetes, AWS, Azure, PostgreSQL, Kafka, Git, CI/CD, Knowledge Graphs What’s on Offer Fully remote working within the UK
Opportunity to work on cutting-edge AI and machine learning systems
Collaborative engineering environment
Exposure to modern cloud and AI technologies
Strong career growth opportunities within a growing AI function

Location: Glasgow (onsite 3 days per week)

Duration: 12-months

Day rate: £450 PAYE

We are seeking an experienced Python ML Engineer to join a global enterprise technology team supporting critical infrastructure and automation initiatives within a leading financial services environment.

In this role, you will design and develop scalable automation solutions focused on workload orchestration, backup abstraction, and self-service capabilities delivered through REST APIs. You will collaborate closely with cross-functional engineering teams and subject matter experts across backup, storage, database, and UNIX environments to help shape future-state architecture and migration strategies.

The ideal candidate will have strong Python development expertise combined with experience building reliable, enterprise-grade applications using modern technology stacks. You should be comfortable working in both greenfield and legacy environments and capable of solving complex technical challenges independently.

Key requirements include:
* Strong Python programming skills
* Experience with machine learning technologies
* Hands-on experience with message queue technologies such as Kafka, RabbitMQ, or Celery
* Proven ability to build REST API services
* Excellent debugging and analytical problem-solving skills
* Strong communication and stakeholder engagement abilities

Desirable experience includes:
* Kubernetes or OpenShift
* UNIX or Windows systems administration
* Storage technologies including SAN, NAS, or S3
* Backup and data protection platforms such as Veritas NetBackup
* Perl scripting

Please apply today to be considered

McGregor Boyall is an equal opportunity employer and do not discriminate on any grounds.

Job Title: Senior C# / .NET Developer - Financial Services (Risk / Securities Lending)

Location: London (Hybrid)

Duration: 6 Months contract

Job Description

Role Overview

• We are seeking an experienced C# / .NET Developer to join a technology team supporting critical Financial Services platforms, with a strong focus on Risk Management and/or Securities Lending domains.
• The role involves designing, building, and supporting high performance systems used for risk calculations and trading/financing workflows.
• You will work closely with quants, risk managers, business analysts, and product owners to deliver robust, scalable solutions in a regulated environment.

Key Responsibilities

• Design, develop, and maintain C# / .NET applications supporting Risk or Securities Lending platforms
• Build and consume RESTful APIs to integrate with upstream/downstream systems
• Implement scalable, testable, and maintainable object oriented code following best practices
• Contribute to risk workflows including exposure calculations, limits, and reporting
• Work with large data sets and high throughput systems typical of financial services
• Participate in code reviews, architectural discussions, and technical design sessions
• Collaborate with cross functional teams (Risk, Front Office, Operations, Compliance)
• Support production systems and assist with incident analysis and remediation

Required Skills & Experience

Core Technical Skills

• Strong hands on experience with C# and .NET (.NET Core / .NET)
• Excellent Object Oriented Programming (OOP) skills and design principles
• Proven experience designing and implementing APIs (REST / JSON)
• Solid understanding of application architecture, performance, and scalability
• Experience with SQL databases (e.g. SQL Server)
• Familiarity with unit testing, integration testing, and CI/CD pipelines

Financial Services Domain Knowledge (Essential)

• Experience working in Financial Services technology environments
• Strong domain knowledge in at least one of:
• o Risk Management
• o Securities Lending / Prime Brokerage
• o Collateral, Margin, or Financing platforms

Risk & Regulatory Experience (Highly Beneficial)

• Exposure to risk and regulatory methodologies such as:
• o RWA (Risk Weighted Assets)
• o CCAR
• o Basel III / Basel IV frameworks
• Understanding of credit risk, counterparty exposure, or capital calculations is a strong advantage

Nice to Have

• 10+ years experience
• Experience with cloud platforms (Azure / AWS)
• Messaging technologies (e.g. Kafka)
• Experience in front to back trading or financing systems
• Familiarity with Agile / Scrum delivery methodologies

Personal Attributes

• Strong problem solving and analytical mindset
• Comfortable working in complex, regulated environments
• Able to communicate effectively with both technical and non technical stakeholders
• Proactive, delivery focused, and detail oriented

Job Title: Lead Test Engineer/Principal SDET
Location: Leeds, Manchester, Birmingham, Newcastle, UK
Job Type: Full-time contract, 12 months

Summary:
We are seeking a highly skilled Lead Test Engineer/Principal SDET to join a major digital trans-formation programme. You will play a key role in defining and embedding a scalable, automation-first test strategy across multiple delivery teams, supporting the transition from monolithic sys-tems to modern microservices architecture.
This is a hands-on technical leadership role, where you will influence engineering practices, set standards, and actively contribute to automation frameworks and testing solutions.

Key Responsibilities:
Test Strategy & Leadership
Define and implement an end-to-end test strategy aligned to microservices architecture
Establish standards, patterns, and best practices across multiple teams
Assess current testing approaches and drive continuous improvement
Embed testing strategy across teams, creating scalable frameworks and exemplars

Hands-on Engineering
Design, build, and maintain automated test frameworks
Work across different test levels: unit, integration, contract, system, and E2E
Lead automation efforts in Java-based environments
Support teams with implementation, not just direction

Collaboration & Governance
Partner with engineering teams and stakeholders to ensure alignment
Provide technical leadership and coaching to testers and developers
Ensure testing practices are consistently applied across teams
Maintain visibility of quality and delivery outcomes

Essential Skills & Experience:
Technical Expertise
Strong experience designing and implementing test strategies for microservices environments
Hands-on automation experience using:
o Java, Selenium, Rest Assured
o API, contract, and integration testing
Experience working with monolith and microservices systems

Knowledge of:
o CI/CD pipelines
o Spring Boot-based applications
o Performance testing fundamentals
Modern Testing Practices

Strong understanding of:
o Contract testing, API testing, and asynchronous messaging (eg Kafka)
o Non-functional testing (performance, accessibility)
Experience with non-relational databases (eg MongoDB)
Automation-first mindset with ability to build reusable, maintainable frameworks

Leadership
Experience operating at Lead/Principal level
Ability to influence stakeholders without direct authority
Strong communication skills across technical and non-technical audiences

Tools & Technologies:
Cloud: AWS
Test Frameworks: Selenium, Serenity BDD, Playwright
Contract Testing: Pactflow, Spring Cloud Contract
Messaging: Kafka
Databases: MongoDB
CI/CD & DevOps: GitHub, GitLab, Jenkins, Docker
Performance Testing: Gatling, K6
Observability: Grafana, Prometheus, Splunk

Special Note:
A hands-on technical leader who can set direction and deliver
Someone comfortable working across multiple teams and scaling best practice
A proactive problem-solver with a strong quality-first mindset

Location: Glasgow (onsite 3 days per week) Duration: 12-months Day rate: £450 PAYE We are seeking an experienced Python ML Engineer to join a global enterprise technology team supporting critical infrastructure and automation initiatives within a leading financial services environment. In this role, you will design and develop scalable automation solutions focused on workload orchestration, backup abstraction, and self-service capabilities delivered through REST APIs. You will collaborate closely with cross-functional engineering teams and subject matter experts across backup, storage, database, and UNIX environments to help shape future-state architecture and migration strategies. The ideal candidate will have strong Python development expertise combined with experience building reliable, enterprise-grade applications using modern technology stacks. You should be comfortable working in both greenfield and legacy environments and capable of solving complex technical challenges independently. Key requirements include: \* Strong Python programming skills \* Experience with machine learning technologies \* Hands-on experience with message queue technologies such as Kafka, RabbitMQ, or Celery \* Proven ability to build REST API services \* Excellent debugging and analytical problem-solving skills \* Strong communication and stakeholder engagement abilities Desirable experience includes: \* Kubernetes or OpenShift \* UNIX or Windows systems administration \* Storage technologies including SAN, NAS, or S3 \* Backup and data protection platforms such as Veritas NetBackup \* Perl scripting Please apply today to be considered McGregor Boyall is an equal opportunity employer and do not discriminate on any grounds.

Lead Test Engineer – 12 month – SC Cleared – ManchesterA highly reputable corporation that is delivering some of the countries most challenging tech projects offering service to millions of users is hiring a Lead Test Engineer with hands on automation experience using Java, Selenium and Rest Assured within AWS.You must have hands on technical leader who can set direction and coach a small team of testers within an agile environment.Our client is seeking a consultant with SC clearance, ability to travel to Manchester on a hybrid basis (3 days) and seeking up to £640 PD Inside IR 35 to start ASAP. We are only considering candidate who are located near Manchester.Test Strategy & Leadership • Define and implement an end-to-end test strategy aligned to microservices architecture • Establish standards, patterns, and best practices across multiple teams • Assess current testing approaches and drive continuous improvement • Embed testing strategy across teams, creating scalable frameworks and exemplarsHands-on Engineering • Design, build, and maintain automated test frameworks • Work across different test levels: unit, integration, contract, system, and E2E • Lead automation efforts in Java-based environments • Support teams with implementation, not just directionKey Experience:

• SC cleared, with industry experience in Public Sector must have
• Strong experience delivering test strategies within microservices environments
• Hands-on automation expertise with Java, Selenium, Rest Assured, API, contract, and integration testing
• Experience across both monolith and microservices architectures
• Knowledge of CI/CD pipelines, Spring Boot applications, and performance testing fundamentals
• Strong understanding of contract testing, API testing, asynchronous messaging (Kafka), and non-functional testing
• Experience working with non-relational databases such as MongoDB
• Automation-first mindset with experience building scalable, reusable test frameworks

One stage interview process, to start ASAP.

Excellent opportunity opens for an experienced Developer strong on Golang with experience in AWS and Kubernetes to join a highly regarded Financial Services entity’s London office. You will act as the team lead and play a key role in building mission-critical financial applications that power trading, investment, and risk management systems across the firm.

If you are passionate about working in a dynamic, fast-paced environment and are eager to apply your technical expertise to the financial services industry, this is the role for you.

Key Responsibilities:

• Design, develop, and maintain high-performance Back End services using GoLang to support financial applications and services, including trading platforms, investment systems, and risk management tools.
• Build and deploy cloud-based solutions using Amazon Web Services (AWS), including services such as EC2, S3, RDS, DynamoDB, and Lambda to create scalable, reliable, and secure infrastructure.
• Implement and manage containerized applications using Kubernetes, ensuring seamless orchestration, scaling, and resilience in a cloud environment.
• Write clean, efficient, and well-documented code while following best practices for financial systems development, focusing on performance and security.
• Collaborate with other development teams, business analysts, and stakeholders to define and refine requirements, and ensure that applications meet financial regulatory standards and business needs.
• Optimize the performance of Back End services, ensuring low-latency responses and high availability, critical for financial services.
• Implement CI/CD pipelines, automated testing, and monitoring systems to ensure the reliability and stability of production systems.
• Proactively identify issues and bottlenecks in existing systems and propose solutions to improve the system’s performance and scalability.
• Stay updated with new tools, technologies, and industry trends in cloud computing, containerization, and financial systems to continuously improve development practices and outcomes.

Ideal Skills:

• Proven experience (2+ years) in GoLang Back End development, with a strong focus on performance optimization and building scalable systems for high-volume, high-frequency financial applications.
• Strong experience working with Amazon Web Services (AWS), including EC2, S3, RDS, DynamoDB, Lambda, and other cloud-native technologies.
• Hands-on experience with Kubernetes for deploying, managing, and scaling containerized applications in a cloud environment.
• Solid understanding of financial systems and services, particularly in areas such as trading platforms, investment management, and risk analytics.
• Experience in building microservices architectures and working with APIs (RESTful, gRPC, etc.) to integrate various systems.
• Strong knowledge of containerization (Docker) and continuous integration/deployment (CI/CD) practices.
• Experience with database systems (relational and NoSQL) and working with financial data.
• Familiarity with DevOps practices and tools to streamline the development life cycle, such as infrastructure-as-code (eg, Terraform or CloudFormation).
• Ability to troubleshoot and resolve issues in production environments, ensuring uptime and performance in high-pressure, mission-critical scenarios.
• Excellent communication skills to collaborate effectively with cross-functional teams and stakeholders in a fast-paced financial environment.
• Experience with serverless computing (AWS Lambda, etc.) to create efficient and scalable solutions.
• Knowledge of financial industry regulations and standards, particularly around data security and privacy.
• Familiarity with event-driven architectures or message queues (eg, Kafka, RabbitMQ) for Real Time data processing.
• Experience with automated testing frameworks and continuous delivery tools like Jenkins, GitLab CI, or CircleCI.
• Understanding of performance monitoring and observability tools such as CloudWatch, Prometheus, or Datadog.

Interested? Please Apply!

Golang Go AWS Kubernetes Terraform Bank Banking Finance Financial Services Crypto Blockchain Web3 Trading Exchange Digital Assets Hybrid Flexible Developer Software Engineer Backend Developer Golang Engineer Kafka Apache Kafka RabbitMQ AWS Lambda Cloud Platform

Python Engineer - Machine Learning - 12 month contract - Glasgow (Hybrid 3 days onsite)

Are you a Python specialist who enjoys solving complex engineering challenges at scale?

I am looking for an experienced Python Machine Learning Engineers based in Scotland to help modernise and automate a large-scale technology estate. You’ll be part of an international team building intelligent services that simplify infrastructure, improve resilience and enable self-service through well-designed APIs.

What you’ll be working on

• Designing and building robust Python services that automate complex workflows
• Developing API-driven solutions that abstract underlying platforms and enable self-service
• Applying machine learning techniques to enhance automation and decision-making
• Integrating modern tooling with Legacy technologies where required
• Partnering with subject matter experts across storage, backup, databases and UNIX environments to shape future-state solutions
• Troubleshooting and resolving technically challenging issues that go beyond standard documentation

What you’ll bring

• Strong Python development experience in production environments
• Hands-on expertise with message-driven architectures (eg Kafka, RabbitMQ, Celery or similar)
• Proven experience building and maintaining RESTful APIs
• Solid experience applying machine learning in real-world systems
• Confidence debugging complex, unfamiliar problems with a pragmatic mindset
• Strong communication skills and the ability to explain technical solutions to varied audiences
• The ability to juggle multiple priorities in a fast-paced environment

Nice to have (but not essential)

• Exposure to enterprise backup or data protection platforms
• Knowledge of data deduplication concepts
• Systems administration experience across UNIX and/or Windows
• Familiarity with storage technologies (SAN, NAS, object storage)
• Experience with container platforms such as Kubernetes or OpenShift
• Working knowledge of Perl

This is a chance to join a global team where your work will underpin their critical platforms used across a large, regulated environment.

Interested? Apply now for immediate consideration.

Principal .NET Engineer (Azure/Microservices)
Salary: Up to £100,000 + Bonus + Benefits
Location: Coventry or Central London - Hybrid (2 days per week onsite)
Working Hours: 40 hours per week - Full time
Job Type: Permanent

A globally established organisation is seeking an experienced Principal .NET Engineer to shape the future of enterprise technology used by millions of customers.

This role will focus on engineering leadership, modern architecture, cloud-native delivery and driving best practice across multiple teams within a high-scale digital environment.

Responsibilities for the Principal .NET Engineer:

• Define and evolve engineering strategy, standards and best practices across your domain
• Lead technical direction across multiple engineering teams and programmes
• Design and oversee delivery of large-scale, high-availability systems using modern Microsoft technologies
• Provide expert guidance on technical risk, architecture decisions and prioritisation
• Support Staff Engineers and delivery teams through hands-on technical leadership
• Drive adoption of DevOps, CI/CD, automation and modern engineering practices
• Champion secure-by-design principles, vulnerability management and risk reduction
• Implement observability frameworks including monitoring, logging and SLO/SLI practices
• Leverage AI and intelligent automation to improve productivity and delivery outcomes
• Mentor engineers and strengthen engineering culture across the organisation

Essential Skills for the Principal .NET Engineer:

• Deep hands-on expertise in ASP.NET Core, Web API, C#, Entity Framework
• Strong experience with Azure, Kubernetes, Kafka and Microservices architecture
• Experience with MongoDB, cloud integrations and distributed systems
• Strong knowledge of JavaScript/TypeScript
• Experience using Terraform/Infrastructure as Code
• Strong understanding of software architecture and scalable system design
• Experience leading development of complex, high-performance platforms
• Proven experience in a Principal, Lead or Senior Engineering role
• Practical experience using Generative AI tools to improve engineering productivity

Desirable Skills for the Principal .NET Engineer:

• Strong advocate of Agile delivery and modern engineering ways of working
• Experience building collaborative engineering communities
• Comfortable making data-driven technical decisions at scale
• Strong mentoring background across engineers of all levels
• Passion for innovation and continuous improvement

If you are a senior .NET engineering leader looking to shape modern cloud platforms at scale while remaining close to technology, this role offers strong influence, complex delivery challenges and long-term impact.

Software Engineer / Developer (Java Kafka API) London / WFH to £90k

Are you a Java technologist seeking a role where you can work on ground breaking technology, continually learning and progressing your career?

You could be joining a global technology consultancy.

What’s in it for you:

Salary to £90k

Hybrid working (x2 days WFH per week)

Pension, Life Assurance, Income Protection

Private medical care for you and your family, including mental health

Travel Insurance

Charitable giving

Gym membership for you and your family

Flexible holiday scheme

Your role:

As a Software Engineer you will design, develop and deliver a range of transformational projects for clients, mainly within the financial services sector and with a focus on Kafka messaging, migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments.

You’ll join a collaborative team with a focus on engineering best practice and continuous improvement of client systems; you will have lots of business and client exposure and continual learning and development opportunities.

Location / WFH:

There’s a hybrid work from home policy with three days a week in the London, City office (or at client sites), you’ll join a friendly, diverse, upbeat team.

About you :

You have Java development skills including multi-threading and concurrency

You have experience with Spring Boot and microservices environments

You have experience with Kafka (or similar messaging tools)

You have a good knowledge of REST APIs

You have a good understanding of AWS

You have a thorough understanding of software development and Computer Science fundamentals such as Object Oriented Programming, Data Structures and Design Patterns

You are familiar with DevOps, CI/CD pipelines

You’re collaborative, enjoy problem solving and interacting with clients

Apply now to find out more about this Software Engineer / Developer (Java Kafka Spring Boot AWS microservices) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

TPBN1_UKTJ

SOLACE MESSAGING ADMINISTRATOR - LONDON

KEY POINTS

• Salary up to £130,000 + Bonus
• 4 days per week onsite in Canary Wharf
• Supporting critical enterprise Solace messaging systems
• Opportunity to work within a low latency, high throughput trading environment

ABOUT THE CLIENT

We’re supporting a globally recognised financial services and technology organisation operating at the forefront of electronic trading and market infrastructure. Due to continued growth within their Messaging team, they’re looking to appoint an experienced Solace Messaging Administrator to help support and optimise a critical low latency messaging environment.

You’ll be joining a highly technical, collaborative team responsible for delivering resilient, high throughput messaging systems that underpin pricing, trading, and other mission critical applications across a complex global infrastructure.

THE BENEFITS

• Competitive bonus structure
• Exposure to enterprise-scale messaging infrastructure
• Opportunity to develop automation and programming skills
• Work within a highly collaborative engineering environment
• Access to modern observability and monitoring tooling
• Long-term progression opportunities within infrastructure and messaging engineering

THE SOLACE MESSAGING ADMINISTRATOR ROLE:

As a Solace Messaging Administrator, you’ll be responsible for administering and supporting enterprise Solace PubSub+ infrastructure across production and non-production environments. You’ll work closely with infrastructure, development, and support teams to ensure messaging reliability, scalability, and performance across mission critical systems.

You’ll play a key role in incident response, monitoring, capacity planning, WAN optimisation, and automation while helping maintain a highly available messaging platform supporting real-time trading and financial applications.

SOLACE MESSAGING ADMINISTRATOR ESSENTIAL SKILLS

• Experience administrating critical Solace messaging systems
• Strong background supporting enterprise production environments
• Experience with Solace PubSub+ appliances and software brokers
• Strong understanding of distributed systems and WAN environments
• Experience with Prometheus and Grafana monitoring tools
• Linux/Unix administration and scripting experience
• Strong troubleshooting and analytical problem-solving skills
• Experience supporting low latency, high throughput messaging systems

TO BE CONSIDERED:

Please either apply through this advert or email me directly via

For further information please call me on / .

By applying for this role, you give express consent for us to process and submit (subject to required skills) your application to our client in conjunction with this vacancy only.

KEY SKILLS

Solace, PubSub+, Messaging Administrator, Linux, Prometheus, Grafana, WAN, Low Latency Systems, Distributed Systems, Python, Bash, Infrastructure, Production Support, Kafka, RabbitMQ, Docker, Kubernetes, AWS, Azure, Messaging Systems

DevSecOps Engineer Hybrid - 3 days a week Due to the nature the Company and work must be eligible for UK Security Clearance (SC)

We are working with a leading UK technology and engineering organisation at the forefront of national security, defence, and advanced innovation. They deliver mission-critical solutions that give customers a decisive information advantage in complex, high-stakes environments.

They are now seeking a DevSecOps Engineer to join a specialist team tackling some of the most challenging problems in modern technology spanning across cloud, security, automation, and AI/ML operations.

You’ll operate at the intersection of cloud engineering, cyber security, and reliability, working on problems such as:

• Securely updating deployed systems in sensitive environments
• Scaling and maintaining resilient platforms under operational pressure
• Applying DevSecOps and SRE principles to mission-critical systems

Required responsibilities

• Drive end-to-end DevSecOps best practice across the SDLC
• Design and implement CI/CD pipelines and deployment automation
• Apply Site Reliability Engineering (SRE) principles to improve system uptime and performance
• Support live operational systems, troubleshooting and resolving issues
• Collaborate across engineering, security, and product teams to deliver secure, high-quality solutions
• Act as a technical leader and mentor, helping teams adopt modern DevSecOps approaches

Key skills required

Cloud Platforms: Strong experience with AWS (primary), with exposure to Azure and/or GCP

DevSecOps & Automation: End-to-end ownership of CI/CD pipelines (GitLab or similar), Infrastructure as Code (Terraform, Ansible, Puppet), and Linux-based scripting

Security Engineering: Hands-on with vulnerability management (e.g. Tenable), IAM (Azure AD, Keycloak), secure networking (certificates, tokens), and code scanning (e.g. SonarQube)

Containerisation & Orchestration: Solid experience with Docker/Podman and Kubernetes, with exposure to GPU/container workloads (desirable)

Architecture & Integration: Experience designing microservices, serverless, and edge architectures, with strong capability across APIs (REST/gRPC) and event-driven systems (Kafka, MQTT)

Observability & SRE: Familiar with Prometheus, Grafana, Elastic, applying SRE principles to improve system reliability, uptime, and performance

Programming & Automation: Ability to script and automate using Python (or similar languages such as Rust)

Role Title: Senior Database Administrator (Terraform & DevOps Focus)

Duration: contract to run until 31/08/2026

Location: Manchester, Hybrid 1 day per month. The client may ask to visit Coventry’s office at Birmingham in future for only 1 day per month depending on the business needs

Rate: up to 441.60 p/d Umbrella inside IR35

Role purpose / summary

We are seeking a hands-on Senior Database Administrator with immediate production experience in PostgreSQL (Essential), MySQL, and MongoDB, alongside strong Terraform and DevOps practices. This is a delivery-critical role-ideal for a candidate who thrives in fast-paced environments and can own database infrastructure end-to-end, from provisioning to CI/CD integration.

This role is not suitable for upskilling or learning; we require proven expertise in cloud-based database administration, automation, and infrastructure-as-code.

Key Responsibilities

Database Administration:

• Own installation, upgrades, performance tuning, troubleshooting, and disaster recovery for PostgreSQL, MySQL, and MongoDB.
• Design and execute database maintenance plans and housekeeping to ensure optimal performance and reliability.
• Implement backup, recovery, security, and access control strategies.
• Demonstrate mid to expert-level knowledge of both RDBMS and NoSQL systems.

Cloud & Infrastructure:

• Deliver production-grade database solutions in cloud based environments.
• Automate database provisioning, scaling, and management using Terraform (non-negotiable).
• Collaborate with DevOps teams to integrate database operations into CI/CD pipelines.

DevOps & Automation:

• Compose Terraform configurations from infrastructure to Git pipelines.
• Work within CI/CD pipelines (GitLab or GitHub) to deploy and manage database changes.
• Ensure Git best practices for version control, collaboration, and pipeline setup.

Required Skills & Experience

• Proven production DBA experience in cloud-based environments.
• Hands-on expertise in PostgreSQL (Essential), MySQL, and MongoDB.
• Strong performance tuning and troubleshooting skills.
• Terraform proficiency is mandatory; ability to design, deploy, and manage database infrastructure using Infrastructure-as-Code (IaC).
• Experience working within CI/CD pipelines and DevOps practices.
• Familiarity with GitLab or GitHub and pipeline setup.

Nice to Have

• Experience with JSON/XML data formats.
• Exposure and some experience to Oracle databases.
• Familiarity with Kafka or event-driven architectures.
• Experience in Agile/DevOps-driven environments.

All profiles will be reviewed against the required skills and experience. Due to the high number of applications we will only be able to respond to successful applicants in the first instance. We thank you for your interest and the time taken to apply!

Principal Java Engineer (AWS/Microservices)
Salary: Up to £100,000 + Bonus + Benefits
Location: Coventry or Central London - Hybrid (2 days per week onsite)
Working Hours: 40 hours per week - Full time
Job Type: Permanent

A globally established organisation is seeking an experienced Principal Java Engineer to shape the future of large-scale digital platforms used by millions of customers.

This role will focus on driving engineering excellence, defining technical standards and leading the design of scalable, high-availability systems across a modern cloud-native environment.

Responsibilities for the Principal Java Engineer:

• Define and evolve engineering strategy, standards and best practices across your domain
• Lead technical direction across multiple engineering teams and programmes
• Design and oversee delivery of large-scale, distributed systems using modern technologies
• Provide expert guidance on technical risk, architecture decisions and prioritisation
• Support Staff Engineers and development teams with deep technical leadership
• Drive adoption of DevOps, CI/CD, automation and modern engineering practices
• Leverage AI and intelligent automation to improve productivity and delivery outcomes
• Mentor engineers and contribute to a strong engineering culture and community of practice
• Work closely with senior stakeholders to align technology with business goals

Essential Skills for the Principal Java Engineer:

• Deep hands-on expertise in Java, Spring Boot, Microservices, Kafka and AWS
• Strong understanding of software architecture and scalable system design
• Experience leading development of high-performance distributed systems
• Proven experience in a Principal, Lead or Senior Engineering role
• Experience defining and governing technical standards and engineering practices
• Experience influencing strategy across multiple teams or domains
• Practical experience using Generative AI tools to improve engineering productivity
• Strong leadership, mentoring and stakeholder engagement skills

Desirable Skills for the Principal Java Engineer:

• Strong advocate of Agile delivery and modern engineering ways of working
• Experience building collaborative engineering communities
• Comfortable making data-driven technical decisions at scale
• Experience working closely with senior engineering leadership teams

If you are a senior Java engineering leader looking to shape modern platforms at scale while remaining close to technology, this role offers strong influence, complex challenges and long-term impact.

About the Role:

• We are hiring a Java Backend Developer to join a leading banking client in the UK. The role involves building and modernizing scalable backend systems, working on microservices architecture, and contributing to high-performance, secure financial applications.

Key Responsibilities:

• Design and develop backend services using Java and Spring Boot
• Build and enhance microservices-based applications
• Develop and integrate REST APIs for enterprise systems
• Work on event-driven architecture using messaging tools (e.g., Kafka)
• Collaborate with cross-functional teams in an Agile environment
• Support CI/CD pipelines, deployments, and production releases
• Ensure high performance, scalability, and reliability of applications

Required Skills:

• Strong experience in Java (8/11/17) and Spring Boot
• Hands-on experience with Microservices architecture
• Experience with REST APIs and backend development
• Exposure to event-driven systems / Kafka (or similar tools)
• Experience with databases (SQL/NoSQL)
• Familiarity with CI/CD tools and containerization (Docker)
• Experience working in Agile environments

Domain Experience:

• Prior experience in Banking / Financial Services is preferred.

£60,000 - £85,000 DOE Southampton - Hybrid Security Clearable \*Are you a software engineer who wants your work to genuinely matter?\* We're looking for a passionate software engineer to join a high-performing team tackling some of the most technically demanding challenges in the defence sector. This isn't about maintaining Legacy systems or shipping incremental updates - it's about building cutting-edge capability that operates at the edge, in the field, and under pressure. The Role You'll be part of a team delivering software solutions that leverage the latest in machine learning, edge compute, and DevOps automation. Think rapid capability deployment, deployed hardware environments, sensors, and robotics - the kind of engineering problems that push you to grow. You'll own code releases and deployments, support operational systems, and collaborate across disciplines to drive agile best practice into real-world solutions. What You'll Be Doing You'll work closely with product owners and fellow engineers across the full delivery life cycle - from architecture discussions to production deployments. Day to day, that means contributing to agile ceremonies (Scrum, Kanban or SAFe), participating in code reviews, working with quality engineers to uphold high standards, and troubleshooting operational systems when it counts. This is a collaborative, technically ambitious environment where your voice matters and your ideas get heard. What We're Looking For You'll have a degree in a STEM subject, or equivalent practical experience. Beyond that, we're interested in engineers who are curious, proactive, and genuinely energised by solving hard problems. You'll be familiar with some combination of the following - we don't expect expertise across everything, but we do want depth in some areas and a hunger to learn the rest. \*Languages:\* Python, Java, Rust, or JavaScript \*Cloud:\* AWS (primary), with Azure or GCP experience a bonus \*Containerisation & Virtualisation:\* Docker or Podman, Kubernetes, and ideally some exposure to GPU containerisation (NVIDIA Container Toolkit, Run:AI) \*Architecture:\* Microservices, serverless, edge compute, RESTful APIs, Protobuf/gRPC, and stream-based pub/sub systems including Kafka and MQTT \*DevSecOps:\* Git, CI/CD pipelines (eg GitLab), Infrastructure as Code (Terraform, Puppet, Ansible), and Linux Shell Scripting As important as the technical profile is the person behind it. You'll communicate clearly with colleagues at all levels, thrive in a team, and take ownership of your work with a solutions-first mindset. What's on Offer Alongside a competitive salary, you'll have access to a flexible benefits package spanning health and wellbeing, financial protection, and lifestyle perks. You'll join a genuinely inclusive organisation that invests in its people and its technology in equal measure - having doubled in size over the last four years, the growth here is real and the opportunities that come with it are too. There's also a thriving internal community of technical groups where engineers come together around shared interests, tools, and ideas. It's the kind of place where intellectual curiosity is encouraged, not just tolerated. \*This role requires the ability to obtain UK Security Clearance.\ If you're ready to work on problems that matter, with people who take pride in what they build, we'd love to hear from you.

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.