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Contract Backend Engineer Jobs
Overview
Discover top contract Backend Engineer jobs on Haystack, the leading IT job board connecting skilled developers with exciting short-term opportunities. Whether you specialize in Java, Python, Node.js, or other backend technologies, find flexible contract roles that match your expertise and advance your career today. Start your search for the best Backend Engineer contract jobs now!
Azure Data Engineer
Opus Recruitment Solutions
Liverpool
Hybrid
Mid
£400/day - £450/day
RECENTLY POSTED

Azure Data Engineer | Outside IR35 | £400 - £450 | 6 months | Hybrid Liverpool You’ll be designing, developing, and managing data pipelines across Azure, primarily using Azure Data Factory to integrate multiple data sources and deliver streamlined workflows into Azure SQL. A strong grasp of Python will be essential as you'll be transforming, cleansing, and validating complex datasets to ensure they’re accurate, efficient, and ready for analytics and product teams to leverage. This position plays a key role in supporting ongoing modernisation efforts by strengthening the way data is collected, processed, and made available across the business. Responsibilities Build, maintain, and improve scalable ETL/ELT pipelines using Azure Data Factory Model, manage, and optimise datasets within Azure SQL Use Python and Pandas for data preparation, transformation, and quality checks Work closely with engineering, product, and analytics teams to understand data requirements and deliver robust solutions Maintain high standards around data integrity, reliability, and performance Contribute to modernising data tools, workflows, and overall data infrastructureWhat We’re Looking For Strong hands-on experience with Azure Data Factory and cloud-based data orchestration Solid Azure SQL knowledge, including schema design and performance tuning Proficiency in Python, with practical experience using Pandas for data manipulation Comfortable delivering in environments where onboarding is minimal and pace is high Background working with product-led or digitally focused teams is beneficial Able to start immediatelyIf this is a role that suits your skillset, can work onsite 2 days per week and immediately available then please apply for the job advert directly or reach out to myself at (url removed). Azure Data Engineer | Outside IR35 | £400 - £450 | 6 months | Hybrid Liverpool

Contract Software Engineer - C
Verso Recruitment Group
Cambridge
Hybrid
Mid - Senior
Private salary
RECENTLY POSTED

Job Title: Contract Software Engineer - C++ Location: Cambridge Rate: We know rate transparency matters. While we can’t list a figure on this advert, we are more than happy to disclose immediately upon application Employment Type: Contract - 6 Month Contract Working Arrangements: Hybrid working (3 days on site, 2 from home) A contract opportunity for an experienced C++ Software Engineer to join a high‑performance engineering team in Cambridge, working on motor control, embedded systems, and cross‑platform development across Windows and Linux. This is an initial 6‑month contract with strong potential for extension. You will develop and enhance software that drives complex motor‑control systems used in advanced engineering environments. The work involves low‑level control, real‑time performance, and robust cross‑platform implementation. Collaboration with electronics, firmware, and systems engineers is central to the role. Key Responsibilities - Design, develop, and maintain C++ applications for motor‑control systems - Implement and optimise algorithms for real‑time motor control - Develop software for Windows and Linux environments - Integrate software with motor drivers and controllers - Debug, test, and validate system behaviour using lab equipment and simulation tools - Contribute to architecture decisions, code reviews, and continuous improvement Essential Skills and Experience - Strong commercial experience in modern C++ (C++14/17) - Proven background in motor control, motion systems, or embedded control loops - Confident working across Windows and Linux platforms - Experience with hardware interaction, device drivers, or real‑time systems - Solid understanding of multithreading, performance optimisation, and low‑level debugging - Ability to work independently in a fast‑paced R&D environment This contract does not accept candidates operating through a Personal Service Company (PSC). Therefore, you will be required to work through an Umbrella company. For more information, please contact Cathy Swain. T: (phone number removed) E: (url removed)

Senior AI Engineer
Hyre AI Limited
London
Remote or hybrid
Senior
£400/day - £500/day
RECENTLY POSTED

In short: A high-growth fintech is looking to bring on a Senior AI Engineer to build and ship production-grade scam intelligence that runs before payments clear. You’ll turn multi-source signals (transaction context, counterparty intelligence, behavioural patterns, unstructured evidence) into reliable, explainable risk decisions - under real-world constraints like latency, uptime, and auditability. About the company: The company is building a payment intelligence layer for banks - running real-time “investigations” on payments to provide rich context on the counterparty and situation. The goal: intercept scams while ensuring genuine payments flow smoothly. They’re early-stage, moving fast, and working on problems where correctness, security and reliability are non-negotiable. Who we’re looking for You’re a hands-on ML/AI builder who’s comfortable owning the full loop: data → modelling → deployment → monitoring → iteration. You care about practical decisioning (not just metrics), you’re thoughtful about trade-offs (customer experience vs protection), and you’re excited about building systems that are explainable and bank-grade. What you’ll do - Build and ship scam risk models and signals (typology classification, risk scoring, decision logic) - Engineer features across heterogeneous data: transaction context, behavioural sequences, counterparty signals, network/graph patterns, and unstructured evidence - Design calibrated outputs (scores + reason codes) that are actionable and explainable for banking workflows - Own evaluation end-to-end: leakage avoidance, cost-sensitive metrics, thresholding, phased rollouts, and post-incident learning - Productionise ML: packaging, deployment, monitoring, drift detection, and retraining strategies - Collaborate closely with backend/product teams to integrate intelligence into real-time payment flows - Work alongside agent/LLM workflows for evidence gathering and synthesis, while keeping the decision core predictable and auditable Must-haves: - Strong experience shipping applied ML into production (not just experimentation) - Strong Python + ability to write maintainable, tested code - Strong SQL + comfort working directly with messy, high-volume data - Solid modelling judgement: calibration, leakage, bias, thresholding, cost trade-offs, monitoring/drift - Experience building decisioning systems where reliability, latency, and explainability matter Nice-to-haves: - Experience in fraud/scams, payments, risk, trust & safety, AML, or adjacent domains - Familiarity with graph/network features and entity resolution style problems - Experience with MLOps tooling (model registry/MLflow, feature stores, orchestration) - Comfort with cloud-native/event-driven systems and working closely with platform/backend engineers - Experience integrating unstructured signals (text/embeddings/RAG style pipelines) into decision systems Why join - Work on a mission with real-world impact: stopping scams before money leaves - Build real-time, bank-grade ML systems with ownership end-to-end - Early team + high autonomy + meaningful technical decisions

Starburst Developer
Stackstudio Digital Ltd.
Multiple locations
Hybrid
Mid - Senior
£450/day - £500/day
RECENTLY POSTED

Role/Job title: Starburst Developer
Work Location: London (2 days in a week MUFG Client Office)
The RoleStarburst DeveloperYour responsibilities: Design and maintain data pipelines using Starburst and related technologies.
Optimize query performance and resolve data processing bottlenecks.
Manage databases to ensure high availability, reliability and security.
Integrate Starburst with various data sources including cloud services and APIs.
Monitor data pipelines and troubleshoot issues proactively.
Collaborate with business users and stakeholders on data requirements.
Maintain comprehensive and up-to-date documentation for data processes.
Stay current with data engineering advancements and propose innovative solutions.
Implement best practices for data quality assurance and testing.Your ProfileEssential skills/knowledge/experience: (Up to 10, Avoid repetition) Minimum 8+ Years of Strong hands-on experience with Starburst Enterprise or Denodo Tool
Advanced SQL skills, including query optimization and performance tuning.
Experience with cloud data platforms (Snowflake, Databricks)
Proficiency in any Scripting language (e.g. Python/Scala)
Proficiency in data analytics and data engineeringDesirable skills/knowledge/experience: (As applicable) Handson experience Starburst or Denodo data virtualization
Data Integration background
Database development experience in any database (Oracle, SQL Server)
Banking domain preferred.

PEGA Developer
Stackstudio Digital Ltd.
Multiple locations
Hybrid
Mid - Senior
£450/day - £500/day
RECENTLY POSTED

Role DetailsRole/Job Title: PEGA Developer
Work Location: London / Edinburgh
Role Type: Contracting
Mode of Working: Hybrid
Hybrid Requirement: 2 days in officeThe RolePEGA DeveloperYour Responsibilities Design, develop, and maintain PEGA-based applications and workflows to support data-driven banking use cases, ensuring scalability, performance, and reliability.
Collaborate with business stakeholders, data analysts, and product owners to translate functional and analytical requirements into effective Pega solutions.
Build and configure case management solutions, including case lifecycles, SLAs, routing, approvals, and exception handling.
Develop and manage Pega rules, data pages, decision tables, and integrations to enable seamless data flow across banking systems and analytics platforms.
Implement business rules and decision logic that support analytics, reporting, and operational decision-making.
Design and develop user interfaces using Pega UI frameworks, ensuring usability, consistency, and alignment with enterprise standards.
Perform unit testing, debugging, and performance tuning, proactively identifying and resolving defects and bottlenecks.
Support application releases and deployments, working closely with DevOps, QA, and support teams across environments.
Contribute to best practices, design standards, and reusable assets, and provide knowledge sharing and mentoring within the development team.Your ProfileEssential Skills / Knowledge / Experience Strong hands-on experience in Pega Platform with proven delivery of end-to-end Pega applications in enterprise environments.
Expertise in Pega Case Management includes lifecycle design, stages, steps, SLAs, approvals, and exception handling.
Sound knowledge of Pega architecture and rule resolution, including class structure, rulesets, circumstancing, inheritance, and performance tuning.
Experience in building integrations using REST/SOAP services, JSON/XML, and handling real-time and batch data exchanges with upstream/downstream systems.
Strong understanding of data modelling in Pega, including Data Pages, data transforms, decision tables, and report definitions.
Hands-on experience with Pega UI development, including Sections, Harnesses, Views (Cosmos / UI-Kit), and responsive design principles.
Experience in decisioning and analytics features such as Pega Decision Tables, Strategies, and basic exposure to Customer Decision Hub or business rules supporting analytics use cases.
Working knowledge of banking and financial services domain
Proficiency in debugging, performance analysis, and issue resolution using Pega Tracer, PAL, and log analysis.
Experience working in Agile / Scrum delivery models, collaborating with product owners, data teams, and QA to deliver incremental business value.

Data Platform Engineer
Morson Edge
Preston
In office
Mid - Senior
£64/hour - £74/hour

Data Platform Engineer – Warton – SC Cleared – 12 Month Contract

About Your Role:

As a Data Platform Engineer in a highly regulated environment, you will be responsible for designing, building, and maintaining secure and scalable data infrastructure that supports both cloud and on premises platforms.
You will play a key role in ensuring that all data systems comply with industry regulations and security standards while enabling efficient access for analytics and operational teams.
A strong command of Apache NiFi is essential for this role.
You will design, implement, and maintain data flows using NiFi, ensuring accurate, efficient, and secure data ingestion, transformation, and delivery.
You should be adept at identifying and resolving issues within NiFi flows, managing performance bottlenecks, and implementing robust error handling strategies.
You’ll work closely with cross-functional teams including data architects, compliance officers, and cybersecurity specialists to integrate data from various systems such as databases, APIs, and cloud platforms.

About You:

As an experienced Data Platform Engineer, your skills and experience may include;

• Strong experience of Apache NiFi
• Experience designing and optimizing data flows for batch, real-time streaming, and event-driven architectures.
• Ability to identify and resolve flow issues, optimize performance, and implement error-handling strategies.
• Optional scripting skills for creating custom NiFi processors.
• Knowledge of data modelling, replication, and query optimization.
• Hands-on experience with SQL and NoSQL databases is desirable.
• Familiarity with data warehousing solutions (e.g., Snowflake, Redshift, BigQuery) would be beneficial.
• Data Platform Management
• Comfortable operating in hybrid environments (cloud and on-prem).
• Experience integrating diverse data sources and systems

Senior GraphQL Engineer (Federation) TypeScript | Node.js | Kubernetes
Staffworx Limited
UK
Hybrid
Senior
Private salary
+3

Senior GraphQL Engineer (GraphQL Federation) to design, build and scale high-performance GraphQL APIs in a modern TypeScript/Node.js stack, deployed to Kubernetes in a cloud-native environment. This is an ideal contract for a GraphQL specialist who loves clean schemas, resilient services, and production-grade delivery.

The Role (Key Responsibilities)

  • Own end-to-end GraphQL API delivery: schema design through to production integration, focusing on performance, maintainability, security, and scalability.
  • GraphQL Federation expertise: design and implement supergraphs, subgraphs, resolvers, and governance patterns (versioning, evolution, backward compatibility).
  • Build and maintain TypeScript + Node.js backend services, integrating with modern frontends and varied data sources.
  • Apply DevOps best practices: CI/CD pipelines (Jenkins, Concourse), Docker, Helm, Kubernetes, and YAML-based deployments.
  • Work in an Agile engineering environment: collaborate closely, review PRs, influence architecture, and continuously improve delivery.
  • Ensure APIs are observable and reliable in production using modern telemetry and APM tooling.
  • Champion GraphQL best practices and share knowledge across teams (mentoring/coaching desirable).

Required Experience (Skills & Tech)

  • Strong commercial experience delivering Federated GraphQL in production (schema-first design, supergraph/subgraph architecture, resolvers, schema governance, and API evolution).
  • Advanced TypeScript and Node.js backend development.
  • Testing experience with modern frameworks such as Vitest and Playwright (API + end-to-end).
  • Hands-on delivery with Kubernetes, Helm, Docker, and YAML (cloud-native deployments).
  • Observability / telemetry: Prometheus, Grafana, OpenTelemetry, Datadog, APM tools.
  • Good understanding of CI/CD, infrastructure-as-code concepts, and production support best practices.
  • Ability to improve existing codebases and influence architectural direction.
  • Experience mentoring / coaching engineers is a plus.

Location:West London (Hybrid 2 days/week on-site)

Contract:6 months initial (extensions highly likely)
Start:ASAP
Eligibility:UK-based candidates only
Rate:Market rates (Outside IR35)

Please send yourlatest CV, confirming:

  • Availability / start date
  • Outside IR35 day rate

Staffworx Limited are a UK-based recruitment consultancy supporting the global digital, e-commerce, software, and business consulting sectors.

Salesforce Developer
Damia Group Ltd
London
Hybrid
Mid - Senior
£635/day - £655/day

Salesforce Developer SC Clearable - London (Mainly Remote) 6 months - INSIDE 665 per day

We are seeking an experienced Salesforce Developer to join a major public sector digital transformation programme. You will work within a secure government environment, delivering and enhancing solutions on the Salesforce platform.

This role offers the chance to work with cutting-edge Salesforce Industry Cloud technologies while contributing to a high-impact national project.

Key Responsibilities

  • Develop Salesforce Industry Cloud solutions using Public Sector Solutions (PSS)
  • Implement Flows, Apex classes, and Lightning Web Components (LWC)
  • Support CI/CD pipelines using Git and collaborate via Jira and Confluence
  • Work with stakeholders to design scalable, sustainable solutions following best practice
  • Ensure testing, documentation, and quality standards are maintained

Experience and Skills Required

  • 5+ years of Salesforce development experience (Public Sector or Industries Cloud preferred)
  • Proven experience in Apex, Flows, and LWC
  • Understanding of Salesforce security and sharing model
  • Experience with integration (MuleSoft, APIGEE) desirable
  • Familiarity with automated testing tools (Provar, Selenium) advantageous
  • Salesforce certifications such as Platform Developer, App Builder, or Public Sector Solutions Accredited Professional are highly desirable

Damia Group 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 our Data Protection Policy which can be found on our website.

Please note that no terminology in this advert is intended to discriminate on the grounds of a person’s gender, marital status, race, religion, colour, age, disability or sexual orientation. Every candidate will be assessed only in accordance with their merits, qualifications and ability to perform the duties of the job.

Should the role require the successful candidate to undergo and be eligible for UK Security Vetting. Clearance sponsorship will be provided where required. Due to the nature of the work, candidates should meet the relevant residency requirements. If applicable, Reserved Post nationality restrictions will be confirmed by the client. Damia is committed to inclusive recruitment and welcomes applicants from all backgrounds.

Damia Group is acting as an Employment Business in relation to this vacancy and in accordance to Conduct Regulations 2003.

Java Developers
Fusion People Ltd
Multiple locations
Hybrid
Mid - Senior
£700/day - £750/day

Java Developers - Java21 min, TDD & BDD, West Yorkshire, 12 month contract - Inside IR35 - 750 /day Major Government client has superb opportunities for outstanding Java Developers with recent experience of Java21 or later. Working within a Team of Developers, Designers and Analysts, you will be an experienced Java Developer with a solid understanding of Agile, and on a day-to-day basis you will be responsible for designing, creating and improving new and existing products, platforms and transactions across government projects. Skills/ experience: You will have recent experience with Java 21 (or later), an excellent understanding of TDD and BDD, large microservice architectures, working in an Agile environment, be willing to work in a pair programming environment, have experience in implementing APIs for internal and external use along with the skills to build up a useful, robust automated test suite to support a continuous deployment environment. Additionally you will take part in 2nd-line support of applications and platforms, including occasional support outside of office hours, working knowledge of Unix-like operating systems such as Linux and/or Mac OS X coupled with understanding of the use of Responsive Web Design. Desirable skills include working knowledge of Jackson, JAX-RS, mocking frameworks such as Mockito, and messaging platforms such as ActiveMQ or Kafka, MongoDB or other document databases, building and scaling high-traffic websites and handling large data sets and scaling their handling and storage. Hybrid role, 60% in the office per week in Leeds Fusion People are committed to promoting equal opportunities to people regardless of age, gender, religion, belief, race, sexuality or disability. We operate as an employment agency and employment business. You'll find a wide selection of vacancies on our website.

Backend Software Engineer - Bazel Java
Randstad Technologies Recruitment
Not Specified
Fully remote
Senior
£500/day - £650/day

Senior Software Engineer - Bazel / Java

We are seeking a collaborative and curious backend Engineer to help drive and develop the next generation of developer infrastructure and tooling as we establish a unified, robust and scalable monorepo ecosystem for all engineers at Spotify

This role helps to support VCS and CI systems in addition to a Fleet Management product for helping developers at our client manage large scale software changes. In the last year, we have invested a huge amount of time and effort into the next steps of that and our migration towards monorepos.

The role is located in our Platform Developer Experience (PDX) R&D Studio. The PDX R&D Studio oversees and owns cross discipline infrastructure that cuts across all engineering at our clent including our VCS, CI systems and beyond.

YOU MUST HAVE EXPERIENCE WITH BAZEL TO BE CONSIDERED FOR THIS ROLE

Role Duties

Bring your experience and knowledge of working with Bazel and scaling monorepos to millions of lines of code to help us rethink the future of backend engineering at Spotify

Help us migrate to, in addition to own and maintain Bazel and any related abstractions built to improve the developer experience

Collaborate with our adjacent infrastructure teams across the company to develop what a best in class monorepo experience means

Essential Skills

  • Strong passion for making developers highly productive
  • Experience developing and maintaining tools for large monorepo-based codebases
  • Excellent problem solving skills
  • Experience working with the Bazel build system and its ecosystem (e.g: rulesets such as rules_jvm_external, IntelliJ Bazel plugin, etc.)
  • Fluency in Java, Python, Starlark and TypeScript

This contract role can be worked fully renmotely but you must be based in the UK. I have interview slots ready to be filled so dont delay and apply ASAP to be considered.

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

C# / .net Software Engineer
Experis
Milton Keynes
Hybrid
Mid - Senior
£500/day - £550/day
+5

Milton Keynes - first few days for training then 1 site visit a month
6 Months Contract

550 per day

We are looking for an experienced C# Software Engineer to join the team and support us on our journey in transforming our application landscape to provide a modern, cloud hosted finance platform.

This exciting opportunity offers the chance for you to work for a fantastic brand and to help shape our digital future.

About the role

As a key part of the scrum team, you will help to shape the company’s core products, working on green and brownfield solutions using the latest technologies.

You will play an important role in the product lifecycle, contributing to design, from development through to delivery.

About you

We are looking for a good communicator and strong team player with skills aligned to our tech stack. We would expect you to have strong experience in most of the following:

Tech Stack

  • C# .Net Core
  • Typescript
  • React
  • Web API
  • Kubernetes / Docker
  • AWS / Azure
  • GIT
  • SQL / NoSQL

Working Principles

  • REST
  • SOLID
  • TDD
  • Agile / SCRUM
  • CI / CD
  • DevOps
Contract Software Engineer - C
Verso Recruitment Group
Cambridge
Hybrid
Mid - Senior
Private salary

Job Title: Contract Software Engineer - C++
Location: Cambridge
Rate: We know rate transparency matters. While we can t list a figure on this advert, we are more than happy to disclose immediately upon application
Employment Type: Contract - 6 Month Contract
Working Arrangements: Hybrid working (3 days on site, 2 from home)

A contract opportunity for an experienced C++ Software Engineer to join a high performance engineering team in Cambridge, working on motor control, embedded systems, and cross platform development across Windows and Linux. This is an initial 6 month contract with strong potential for extension.

You will develop and enhance software that drives complex motor control systems used in advanced engineering environments. The work involves low level control, real time performance, and robust cross platform implementation. Collaboration with electronics, firmware, and systems engineers is central to the role.

Key Responsibilities

  • Design, develop, and maintain C++ applications for motor control systems
  • Implement and optimise algorithms for real time motor control
  • Develop software for Windows and Linux environments
  • Integrate software with motor drivers and controllers
  • Debug, test, and validate system behaviour using lab equipment and simulation tools
  • Contribute to architecture decisions, code reviews, and continuous improvement

Essential Skills and Experience

  • Strong commercial experience in modern C++ (C+/17)
  • Proven background in motor control, motion systems, or embedded control loops
  • Confident working across Windows and Linux platforms
  • Experience with hardware interaction, device drivers, or real time systems
  • Solid understanding of multithreading, performance optimisation, and low level debugging
  • Ability to work independently in a fast paced R&D environment

This contract does not accept candidates operating through a Personal Service Company (PSC). Therefore, you will be required to work through an Umbrella company.

For more information, please contact Cathy Swain.
T: (phone number removed)
E: (url removed)

MS Dynamics and PowerApps Developer
Experis
London
In office
Mid - Senior
£500/day - £560/day

Rate - 565
Clearance required: Active SC with a government agency used within the last 6 months
Location: London, Croydon

Job Description:

  • Have experience with Dynamics 365
  • Have experience with Power Platform and Power Automate Have experience with Azure and Azure DevOps

Must be SC Cleared

Project overview:
The CRM project aims to introduce a new Customer Relationship Manager (CRM) to replace the current manual processes. We are using Microsoft Dynamics 365 to build the alpha version for two key business areas. Once the alpha phase is approved, we will move into the beta phase to develop the production-ready CRM."

‘This role requires additional vetting, which means this could take longer than our normal onboarding process. You will require additional vetting for this position, which means the process can take longer than the usual onboarding process with Capgemini. Please do not hesitate to get in touch if you have any queries.’

Senior Cloud Full Stack Developer
James Newbury
Dunstable
Hybrid
Senior
£60,000 - £80,000
+1

If you are a versatile and highly skilled Senior Cloud & Full Stack Engineer ready to work, support and advance this UK leading companies modern application ecosystem, then please, do read on!

This role requires strong expertise across cloud infrastructure, backend microservices, frontend development, and legacy system support. The ideal candidate will possess comprehensive skills in all these areas, ensuring a well-rounded and robust contribution to our technology landscape.

Duration: temporary contract for 3-6months or so

This is a paid per hour PAYE temporary role

Rate of Pay PH: 33-43ph plus holiday pay (circa 60-80,000 if salaried)

Location: hybrid. Need to work in the office in Central Bedfordshire for meetings, reviews and handovers, which will be once a week or so.

Hours: 35 hrs per week 9am-5pm (1 hr lunch) Days: Mon-Fri

Benefits:

  • free parking
  • electric vehicle charge points
  • holiday pay accrual
  • wfh most of the time
  • pension after a qualifying period

Key Responsibilities

  • Design, build, and maintain AWS infrastructure-as-code deployments using Terraform and related tooling.
  • Manage and optimize serverless microservices, including Lambda functions, API Gateway, and Amplify-hosted applications.
  • Support and enhance Python-based Lambda microservices and Node.js backend components.
  • Maintain and develop React-based front-end applications, including complex UI components and dynamic API integrations.
  • Oversee database administration for MySQL/RDS
  • Apply strong security best practices across infrastructure, applications, and data flows.
  • Provide maintenance and incremental improvements to legacy .NET applications where required.
  • Produce and maintain clear technical documentation for infrastructure, services, and processes.
  • Collaborate effectively with cross functional teams through strong communication and teamwork.

Core Technical Skills (Primary Focus & Essentials/Nice to have)

  • AWS (essential) IaC & Terraform
  • Python (essential) for Lambda microservices
  • Node.js backend development (essential)
  • MySQL/RDS administration (essential)
  • React, HTML, CSS, and AG Grid
  • API Gateway & dynamic API integrations
  • Documentation and communication excellence (essential)
  • AWS Amplify workflows
  • Legacy .NET application support

Ideal Candidate Profile

  • Comfortable working across cloud infrastructure, backend services, and front-end applications.
  • Able to take ownership of systems end-to-end, from architecture to deployment.
  • Strong documentation habits and the ability to communicate clearly with technical and non?technical stakeholders.
  • A collaborative mindset with a focus on team alignment and shared problem?solving.
  • Eager to learn new technologies and expand into unfamiliar areas.
  • Excellent communication skills and a proactive approach.
  • Proven relevant experience, 3 years or more.
  • Eligibility to work in the UK on a full time basis (please, no student visas as it will not cover the duration of the hours/contract)
  • Ideally, a driver as the location of the office is not close by any public transport links

This is to start asap. So if you are this amazing, talented Cloud & Full Stack Engineer, then please send your cv to James Newbury Appointments for immediate review. If you do not hear back within 3 working days, unfortunately, you will not have been shortlisted on this occasion, however ,we would like to thank you for your interest and wish you all of the very best in your search.

Automated Intelligence SME
Experis
Basingstoke
In office
Mid - Senior
£600/day
+2

Clearance Required: SC

An opportunity is available for an experienced AI Subject Matter Expert to support the implementation and delivery of Automated Intelligence solutions within secure environments.

You will work across technical and business teams to design, develop and deploy AI enabled automation capabilities that integrate into existing enterprise systems.

The Role

You will support the delivery of AI driven automation initiatives across secure programmes. The position requires strong technical capability combined with stakeholder engagement and risk awareness.

Key Responsibilities

  • Design, build and deploy automation solutions integrating AI and machine learning models into existing systems and workflows.
  • Analyse business processes with stakeholders to identify automation opportunities and define clear requirements.
  • Develop automation scripts and build data pipelines covering ingestion, preprocessing and feature engineering.
  • Conduct testing, troubleshooting and performance monitoring to maintain system accuracy and reliability.
  • Collaborate with data scientists, software engineers and IT teams to ensure seamless deployment.
  • Produce clear technical documentation and performance reporting.
  • Support contract discussions, stakeholder engagement and business risk considerations where required.

Technical Skills Required

  • Proficiency in programming languages such as Python, Java, C# or R.
  • Experience with machine learning frameworks including TensorFlow, PyTorch or Scikit-learn.
  • Familiarity with cloud platforms such as AWS, Azure or Google Cloud and associated MLOps practices.
  • Experience with automation and orchestration tooling such as UiPath, Airflow or Kubeflow.

Experience and Capability

  • Strong experience delivering AI or automation solutions within enterprise environments.
  • Ability to work with cross functional teams and translate technical solutions into business value.
  • Experience operating within controlled or regulated environments.
  • Strong written and verbal communication skills.
  • Experience supporting stakeholder engagement and business risk management.

This role suits a technically credible AI professional who can design and implement automation solutions while engaging effectively across secure and regulated programmes.

To apply, please send your CV by pressing the apply button

RPA Consultant
ECS Resource Group Ltd
London
Fully remote
Mid - Senior
£500/day - £700/day
TECH-AGNOSTIC ROLE

Contract Inside IR35 Remote 1-2 Months

We are seeking an experienced RPA Consultant to review, optimise and support the migration of an existing automation solution into a cloud-based environment.

The current estate (3 production workflows) requires technical assessment, remediation and structured migration aligned to best practice.

Key Responsibilities

  • Conduct a health check of existing RPA workflows (design quality, error handling, logging, security, environment configuration).
  • Produce and implement a prioritised improvement plan.
  • Review and validate cloud architecture and deployment approach.
  • Support migration of unattended RPA processes to a cloud VM environment.
  • Perform end-to-end testing to ensure stability and performance.
  • Provide documentation and structured knowledge transfer to internal stakeholders.

Required Experience

  • Strong experience delivering RPA / intelligent automation solutions (e.g. Power Automate, UiPath, Blue Prism or similar).
  • Experience migrating automation solutions from on-premise to cloud environments.
  • Solid understanding of cloud infrastructure, identity management and security best practice.
  • Proven experience conducting RPA health checks, remediation and optimisation.
  • Comfortable engaging with business stakeholders and translating technical improvements into operational outcomes.

Contract Details:

  • Inside IR35
  • Remote
  • Duration: 1-2 months

ECS Resource Group are an Equal Opportunity Employer, for more information please click the following link: (url removed) In accordance with the Equality Act 2010, if you require an alternative form of application please click the following link: Flexible Application Process - (url removed)/work/flexible-application-process

C# .NET Developer
Adecco
London
Hybrid
Mid - Senior
£600/day - £650/day

Contract
Daily Rate: 600 - 650 (inside IR35 via umbrella)
Contract Length: 6 months initially
Location: Hybrid Working - 2/3 days onsite per week

Our client, a leading organisation in the tech sector, is seeking a talented C# .NET Developer to join their dynamic team on a contract basis. If you are passionate about software development and are eager to tackle exciting challenges, we want to hear from you!

Key Responsibilities:

As a C# .NET Developer, you will:

Understand business requirements and design applications that meet those needs.
Engage in business data analysis to inform application design and development.
programme in Visual C#.NET while utilising both Oracle and SQL Server databases.
Conduct unit testing and ensure quality assurance (QA) for all developed applications.
Implement solutions in production and disaster recovery environments, providing support to users.
Prepare and maintain technical documentation related to your projects.

In addition to new application development, your role will also encompass supporting existing C# and .NET applications. You will work closely with the IT department to provide general IT support and maintain the environments where applications are hosted.

Additional Responsibilities:

Define database objects required for various systems and interact with SQL and Oracle Database Administrators in both London and New York.
Provide scripts for database inquiry languages (T-SQL for SQL Server and PL/SQL for Oracle) to enable data analysis based on business requirements.
Support the setup of system distribution methods for Citrix and application servers for both web and Windows applications.
Troubleshoot systems during failures and implement solutions, including code fixes and SQL scripting, while checking Windows Servers and databases.
Follow the Development Team’s Change Management Control procedures to secure proper approvals prior to production updates.
Update versions of MS .NET Framework and MS Visual .NET platform as needed to ensure existing systems run smoothly in the production environment.
Liaise with relevant support teams such as Technical Support, Network and Infrastructure, and Database Administrators when business users encounter system issues.
Assess the impact of data processing loads on SQL and Oracle databases and propose alternative solutions when necessary.
Actively assist in rolling out changes through coordination with the Release team and maintain a change history of applications.
Communicate effectively with primary support Helpdesk staff in both London and New York to provide necessary system support.
Be available for occasional out-of-office hours support during weekdays and weekends.

If you are a proactive C# .NET Developer looking for a challenging opportunity to showcase your skills, please apply now with your CV and a brief cover letter detailing your relevant experience.

Join us in shaping the future of technology!

Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Oracle DBA
Adecco
Wokingham
Hybrid
Mid - Senior
£500/day - £600/day

Oracle Database Administrator (DBA)

Contract
Daily Rate: Up to 600 (Inside IR35 via umbrella)
Contract Length: 6 months initially
Location: Sindlesham, Wokingham (1 day per week onsite is required)

Overview:

Our client is seeking an experienced Oracle Database Administrator to provide essential support for Oracle and SQL Server databases within the estate. This role is vital in maintaining the systems that ensure operational continuity in the UK. As part of a dedicated DBA team, the successful candidate will be instrumental in managing an extensive Oracle database estate, ranging from legacy systems to modern deployments.

Key Responsibilities:

Provide 24x7 database management and administration expertise in high availability environments.
Conduct proactive maintenance and monitoring of Oracle databases.
utilise change, problem, incident, and release management tools effectively.
Liaise with third-party service centres as necessary.
Perform technical analyses and engage with other technical leads to adopt best practises.
Assist in application/system transitions to ensure standby and site failover capabilities.
Offer technical assistance and mentoring to junior resources.
Monitor and respond to incidents and requests using workflow management tools.

Knowledge and Qualifications Required:

Degree or higher educational qualification, coupled with significant IT experience.
ITIL certification (minimum foundation level; higher preferred).
Industry-recognised technical certification in database administration.

Experience Required:

Extensive experience in Oracle 12-19C Database and RAC Administration.
Proficient in Oracle ASM, RMAN, GoldenGate, and Enterprise Manager.
Basic UNIX administration and KSH shell scripting skills.
Familiarity with OpenVMS is a plus.
Strong verbal and written communication skills, with experience in writing and reviewing technical documentation.

Desired Experience:

Proven customer-facing experience in an IT service role.
Methodical and positive approach to problem-solving.
Experience in supporting business-critical, real-time systems.
Capability to work independently or as part of a motivated team.
Previous involvement in 2nd line Out Of Hours support and on-site attendance as required.

Working Environment:

Hybrid working model: 1 day per week onsite.
Standard hours: 9 am - 5 pm.

If you are an Oracle DBA ready to make a significant impact in a critical environment, we invite you to apply. Please submit your CV and a brief cover letter outlining your relevant experience. Our client looks forward to welcoming a new member to their team!

Note: Only candidates who meet the eligibility requirements will be contacted for an interview.

Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

SQL DBA
VIQU IT
London
Hybrid
Mid - Senior
£500/day - £600/day

SQL DBA 6 Months Contract - Inside IR35 - Security Clearance

Job Description

We re on the lookout for an experienced SQL DBA (Database Administrator) to join our client s database team.

In this role, the SQL DBA will work across several different projects, handling tasks independently, making informed decisions, and collaborating effectively with the team. The work includes installing, migrating, and supporting BI stacks within the business.

The SQL DBA will be involved in the testing, implementation, and post-deployment support of SQL systems, and you’ll play a part in the operational management of the applications developed following a DevOps approach.

SQL DBA Responsibilities:

  • Develop robust SQL and database solutions.
  • Lead migrations of BI stacks from older versions (such as 2008 R2 and 2012) to newer versions (2016/2019).
  • Take ownership of code reviews and actively participate in peer reviews.
  • Configure and maintain SQL Server Databases
  • Performance tuning and optimization
  • Experience with High Availability and Disaster Recovery processes
  • Support the full data lifecycle, contributing to an agile working environment
  • Provide coaching and mentoring to colleagues when necessary
  • Experience with Terraform, Git and PowerShell is a plus

This role is based in central London, the SQL DBA will be required onsite 2 days per-week.

My client also requires the SQL DBA to hold current, valid Security Clearance for this role.

To discuss this exciting SQL DBA opportunity in more detail, please APPLY NOW for a no obligation chat with your VIQU Consultant. Additionally, you can contact Ruby Ufton, by exploring the VIQU IT Recruitment website.

To be the first to hear about other exciting opportunities, technology, and recruitment news, please also follow us at VIQU IT Recruitment on LinkedIn, and

Senior Moodle Developer
SF Recruitment
Coventry
Hybrid
Senior
£47,000 - £56,000

(Full Stack / PHP) - 6 Month FTC - Hybrid 1 day a week, West Midlands
£47,000 - £56,000 per annum

SF Technology are supporting a leading UK Higher Education institution in the recruitment of a Senior Moodle Developer to join their Digital Learning team on a 6-month fixed-term contract.

This is a hands-on, senior-level development role requiring strong experience in Moodle plugin development, integrations and enterprise-scale platform enhancement.

The Role
You will be responsible for the ongoing development, integration and optimisation of a large-scale Moodle environment within a complex Higher Education setting.

Key responsibilities:
Developing and maintaining custom Moodle plugins
Building and supporting deep Moodle integrations (REST APIs, LTI, data exchange)
Enhancing performance through logging, caching and clean code practices
Supporting Echo360 and related learning technologies
Providing senior-level troubleshooting (2nd/3rd line support)
Collaborating with internal developers and technical stakeholders
Contributing to continuous improvement and technical best practice
This role requires someone who can operate independently and deliver high-quality, scalable solutions.

Essential Experience
Proven hands-on Moodle development experience
Moodle plugin development (build or significant customisation)
Strong PHP development skills
REST API design and implementation experience
JavaScript, CSS and front-end development capability
Experience working with integrations across multiple systems
Linux command line familiarity
Higher Education experience is highly desirable.

Working Arrangement
1 day a week on site
West Midlands University
6-month fixed-term contract
Pro rata salary
Immediate start preferred

Due to the specialist nature of this role, we are particularly keen to speak with developers who can demonstrate deep Moodle plugin and integration expertise.
Apply via SF Technology for a confidential discussion.

Snowflake Data Engineer
Square One Resources
London
Hybrid
Mid - Senior
£550/day - £600/day

Job Title: Snowflake Data Engineer
Location: London (2 days on-site per week)
Salary/Rate: 550 - 600 per day inside IR35
Start Date: March
Job Type: Initial 3-6 month contract

Company Introduction
We have an exciting opportunity now available with one of our sector-leading consultancy clients! They are currently looking for a skilled Snowflake Data Engineer to help on their cloud migration project.

Job Responsibilities/Objectives
You will be responsible for designing and building scalable data pipelines, Data Vault models/Dimension Model, and Snowflake/dbt workloads for cloud migration projects.

? Implement Data Vault 2.0 (Hubs, Links, Satellites) /Dimension Model on Snowflake.
? Build ELT pipelines using Snowflake, dbt, Python/PySpark.
? Develop ingestion from APIs, databases, streams.
? Optimize Snowflake warehouses, cost, and performance.
? Collaborate with architects, analysts, and DevOps.
? Maintain documentation, lineage, governance standards.

Required Skills/Experience
The ideal candidate will have the following:

? Strong SQL; Snowflake ELT; dbt experience.
? Python/PySpark, ETL/ELT design.
? Data Vault 2.0 or dimensional modeling.
? AWS services (S3, Glue, Lambda, Redshift) or GCP equivalents.
? Experience with CI/CD for data pipelines.

Good to have skills
Although not essential, the following skills are desired by the client:

? Kafka/Kinesis, Airflow, CodePipeline.
? BI tools (Power BI/Tableau).
? Docker/OpenShift; metadata driven pipelines.

? 3-8+ years Data Engineering experience.
? Cloud data engineering and Snowflake/dbt hands on exposure.

If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format.

Disclaimer
Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies.
Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.

Frequently asked questions
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To apply, simply create a profile on Haystack, upload your resume, and submit your application directly through the job listing. Some employers may require additional screening or coding tests.
Haystack offers both remote and on-site contract Backend Engineer positions. You can filter job listings based on location preferences to find opportunities that match your availability.
Commonly required skills include proficiency in backend programming languages like Java, Python, Ruby, or Node.js, experience with databases such as MySQL or MongoDB, and familiarity with cloud platforms like AWS or Azure.
Yes, many contract Backend Engineer jobs on Haystack allow for negotiation on contract length, hourly rate, and other terms. Communication with the employer or recruiter during the interview process will help clarify these details.