25 of 25 Contract Distributed Systems Jobs in the UK excluding London

AI Technical Lead

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
build of this platform, shape its architecture, and partner with deep technical SMEs across the business to ensure our AI systems operate with the highest levels of performance, security, and responsible oversight The client is investing in the next generation of AI capabilities, with safety, resilience, and trust … core. We're creating a cutting-edge AI Control Tower -a centralised platform and dashboard that monitors, governs, and optimises AI systems across the bank. This is a hands-on, high-impact role at the intersection of AI governance, distributed systems, observability, and platform engineering. This role ...

Senior Software Engineer

Hiring Organisation
Randstad Technologies
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£53.85 - £61.68 per hour
Hybrid) Contract Duration: 6 months Join a specialized Applied AI team driving innovation in business operations. The group accelerates AI transformation by developing agentic systems and full-stack infrastructure to automate workflows and drive efficiency. We're seeking a Senior Software Engineer (L5) to deliver production-grade code while … architecting autonomous AI workflows. This role combines technical expertise, product thinking, and scaling AI solutions across complex systems, working in a small agile team within a larger engineering organization. Key Responsibilities Design, develop, and deploy AI-powered systems that enhance global sales workflows. Build scalable backend services ...

Application Developer

Hiring Organisation
VANLOQ LIMITED
Location
Sheffield, South Yorkshire, Yorkshire, United Kingdom
Employment Type
Contract, Work From Home
permissions Support CI/CD pipelines, automated testing, and validation of IAM policies and API behaviour Troubleshoot identity, access, and API issues across distributed systems Collaborate with security teams on audits, compliance, and incident investigations Produce clear technical documentation and reusable components Required Experience Strong experience building identity ...

Senior Ruby Developer - EU Based

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
cloud optimisation initiatives What We’re Looking For Strong commercial experience as a Senior Ruby or Ruby on Rails Engineer Deep understanding of distributed systems and cloud-based application design Extensive hands-on experience with AWS Solid background in building scalable APIs, microservices, and backend systems Familiarity ...

FX e Trading Senior Full Stack Engineer (React TypeScript + Java)

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£759 - £900 per day
TypeScript, modern tooling (bundlers, linting, testing frameworks). Backend: Core Java, Spring Boot (or similar), multithreading/concurrency, performance tuning. Experience designing and operating distributed systems (microservices, event-driven architectures, messaging/streaming). Strong understanding of computer science fundamentals (data structures, algorithms, concurrency, networking, OS). Proven … experience in e-trading or real-time financial systems (FX highly desirable), including familiarity with market data, order flows, and execution workflows. Hands-on with CI/CD, containerization, cloud/on-prem deployments, and observability. Comfort evaluating and integrating AI coding tools into daily development workflows. Excellent communication ...

Senior Full Stack Engineer – FX e-trading – Java / React

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£759 - £900 per day
TypeScript, modern tooling (bundlers, linting, testing frameworks). Backend: Core Java, Spring Boot (or similar), multithreading/concurrency, performance tuning. Experience designing and operating distributed systems (microservices, event-driven architectures, messaging/streaming). Strong understanding of computer science fundamentals (data structures, algorithms, concurrency, networking, OS). Proven … experience in e-trading or real-time financial systems (FX highly desirable), including familiarity with market data, order flows, and execution workflows. Hands-on with CI/CD, containerization, cloud/on-prem deployments, and observability. Comfort evaluating and integrating AI coding tools into daily development workflows. Excellent communication ...

Java Developer-Golang

Hiring Organisation
Qualient Technology Solutions UK Limited
Location
Burgess Hill, West Sussex, United Kingdom
Employment Type
Contract
Contract Rate
£300 - £400/day
internals and object-oriented design principles Experience with frameworks such as Spring/Spring Boot Familiarity with REST APIs, microservices architecture, and distributed systems Experience with relational and/or NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB) Knowledge of version control systems (Git) Understanding of unit testing ...

Senior DevOps Engineer

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
Leeds, West Yorkshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£450 per day
Contribute to the design, development and operation of a large-scale observability platform Build and maintain cloud infrastructure using Infrastructure as Code Work across distributed systems at scale Write, review and test code as part of DevOps engineering practices Manage deployments and work with modern source-control workflows ...

Java Software Developer

Hiring Organisation
Line Up Aviation
Location
Portsmouth, Hampshire, United Kingdom
Employment Type
Contract
Contract Rate
£55/hour
Developing in Spring with Hibernate Good Knowledge of developing REST within HTTPS Experience of developing within a microservice architecture Web Services using RESTful APIs Distributed systems Knowledge and use of software design patterns Agile Development Processes CI/CD delivery techniques Source code management … Issue tracking systems (such as Jira) UML/SysML using Enterprise Architect or similar Ability to self-motivate and to work well within a team environment. Ability to promote innovation in self and others Ability to interact with internal & external stakeholders in a confident and professional manner ...

Software Developer (Java)

Hiring Organisation
IO Associates
Location
Portsmouth, Hampshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
£51 - £55 per hour + (Via Umbrella)
days per week onsite) About the Role & Organisation: This organisation operates at the forefront of advanced engineering and technology, delivering complex, mission-critical systems within highly regulated environments. It offers a collaborative, quality-driven culture where innovation, technical excellence, and continuous improvement are actively encouraged, providing engineers the opportunity … 8+) Good knowledge of Spring Boot, Spring Framework, and Hibernate Experience building RESTful services over HTTPS Hands-on experience with microservices architectures Understanding of distributed systems Knowledge of software design patterns Experience working within Agile development frameworks Familiarity with CI/CD pipelines and delivery techniques Source control ...

Software Developer

Hiring Organisation
Belcan
Location
Portsmouth, Hampshire, United Kingdom
Employment Type
Contract
Contract Rate
£55/hour
global leader in aeronautics, space, and advanced technology is seeking a skilled Software Developer to join a highperforming Scrum team working on the management systems for a new satellite. The organisation brings together thousands of passionate innovators dedicated to making the world more connected, safer, and smarter. Its culture … Java (version 8+) Strong knowledge of Spring Boot, Spring Framework, and Hibernate Experience developing RESTful services over HTTPS Handson experience with microservice architectures and distributed systems Solid understanding of software design patterns Familiarity with Agile development processes Experience with CI/CD pipelines Proficiency with Git for source ...

AWS Architect

Hiring Organisation
Fairfield Consultancy Services Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £625 per day
modernization frameworks. Migration & Modernization Expertise Proven experience leading end-to-end large-scale migration programs . Strong understanding of application architectures (monolith, microservices, distributed systems). Skilled in designing containerization & orchestration strategies (Docker, Kubernetes, EKS). Leadership & Communication Ability to influence senior stakeholders and articulate architecture decisions. Strong ...

.Net Developer E-Trading & Front Office

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£0 per annum
Server Must have experience with multi-threading programming Experience with asynchronous and event driven programming Experience developing real-time applications Familiar with building distributed systems Knowledge of networks and topologies Firm grounding of common algorithms Excellent oral and written communication skills Proactive team player with ...

Senior QA Engineer – RingOne Advanced Identity Cloud (AIC)

Hiring Organisation
KBC Technologies UK LTD
Location
Edinburgh, Midlothian, Scotland, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
quality reports. Mentor junior testers and share best QA practices. Required Skills & Experience: 8+ years IT experience, including 4+ years in test automation for distributed systems, REST APIs, or cloud apps. 3+ years programming in Java, Python, or C# , building automated frameworks. Hands-on with BDD tools ...

Observability Architect

Hiring Organisation
Fairfield Consultancy Services Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £625 per day
Logging platforms: Splunk, ELK/Opensearch, CloudWatch Logs Metrics & telemetry: Prometheus, Grafana, OpenTelemetry Event management: ServiceNow, PagerDuty, Moogsoft, BigPanda Strong knowledge of instrumentation for distributed systems, microservices, containers (EKS, ECS), serverless workloads, and legacy systems. Migration & Architecture Skills Proven experience supporting large-scale on-prem to AWS migrations ...

Technical Architect

Hiring Organisation
RCRTR
Location
Swansea, City and County of Swansea, West Glamorgan, United Kingdom
Employment Type
Contract
Contract Rate
£470 - £500/day
frameworks such as Spring/Spring Boot. Create robust, well-governed API architectures (RESTful, event-driven, synchronous/asynchronous). Lead the design of distributed microservices, ensuring scalability, resilience, observability, and maintainability. Apply schema-driven design principles (e.g., JSON Schema, OpenAPI, AsyncAPI) to ensure consistent and reusable domain models. … AWS. Strong hands-on background in Java, Spring Boot , and JVM-based service architectures. Deep experience with APIs (REST, event-driven, messaging), microservices, and distributed system design. Strong understanding of schema-driven design , using tools such as JSON Schema, OpenAPI, or AsyncAPI. Solid understanding of cloud security, identity ...

Hadoop Platform Engineer

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
quality data solutions Contributing to our cloud migration strategy , helping move legacy workloads into modern cloud platforms Driving platform simplification and engineering excellence across distributed systems Supporting enterprise data transformation activities that enable the bank's strategic objectives Ensuring stability, performance, and security of critical data services What … Looking For Strong hands-on experience with Hadoop ecosystem tools (HDFS, Spark, Hive, Oozie, YARN, etc.) Experience operating and supporting large, complex, distributed clusters Understanding of data engineering principles and data platform design Experience with on-prem Hadoop environments and ideally cloud-based data platforms Exposure to cloud technologies ...

Software Release Specialist

Hiring Organisation
Cathcart Technology
Location
Edinburgh, Midlothian, Scotland, United Kingdom
Employment Type
Contract, Work From Home
join a leading technology business in Edinburgh. In this role, you'll coordinate the end-to-end delivery of software changes across production systems, ensuring releases are reliable, compliant, and delivered smoothly across complex platforms. The Opportunity This is a chance to play a central role in how software … production at scale. You'll work as part of a global release function, supporting engineering teams that deliver frequent, high-impact changes across multiple systems and environments. You'll coordinate releases end to end, helping teams move changes efficiently from development through to production while maintaining strong governance, quality ...

Senior Platform Engineer

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £600 per annum
deliver industry-leading features at scale. Requirements Background in software development Strong communication and ability to influence technical direction Experience with microservices and distributed systems Proven cross-team collaboration Strong AWS experience (EKS, RDS, S3, CloudFront, MSK) Understanding of SLIs, SLOs, SLAs Knowledge of networking and Linux administration ...

Senior Full Stack Engineer - FX e-Trading

Hiring Organisation
Pontoon
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£900 per day
quality code. What we're looking for Strong experience in full-stack development with React/TypeScript and Java . Proven experience with microservices, distributed systems, and real-time trading or financial platforms . Hands-on understanding of system performance, latency optimisation, and observability . Ability to collaborate ...

Site Reliability Engineer (SRE)

Hiring Organisation
Henderson Scott
Location
Wokingham, Berkshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
Up to £385 per day
Tekton; Kustomize or Helm . Scripting: Proficiency in Bash and Python . Observability: Prometheus, Grafana, Loki, and Tempo. Ecosystem: Multi-cloud/hybrid distributed systems. Requirements: Ability to work in secure environments (Security Clearance likely required). Drive to learn from senior engineers and adopt modern best practices. ...

Senior Test Engineering Manager Automation-First

Hiring Organisation
Salt Search
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£480 - £500 per day
engineering leadership experience Proven track record of creating and evolving test strategies, not just executing them Experience building and scaling test automation in complex, distributed systems Strong people leadership experience, including coaching and developing engineers Background in sell-side or mission-critical platforms (fintech, SaaS, infrastructure, high-availability … systems) Deep understanding of automation strategy, CI/CD, and modern delivery practices *Rates depend on experience and client requirements ...

Machine Learning Infrastructure Developer

Hiring Organisation
US TECH SOLUTIONS LIMITED
Location
Cambridgeshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£54.00 - £56.00 per hour
Responsibilities: Create robust, flexible, and scalable machine learning tooling and infrastructure that supports research scientists in leveraging large-scale internal infrastructure (e.g., source control, distributed compute clusters, data storage). Work collaboratively as part of a multifunctional team where communication, documentation, and teamwork are highly valued. Write clean, maintainable … focus on building and maintaining scalable infrastructure. Hands-on experience with PyTorch or similar machine learning frameworks (e.g., TensorFlow). Experience working with distributed systems or high-performance compute infrastructure. 2+ years of experience working with large, complex datasets for machine learning, including data capture and annotation. Demonstrated ...

Test Manager Connected Services

Hiring Organisation
Signet Resources
Location
Bracknell, Berkshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 per day
recommendations based on results and risk. Lead risk-based testing, identifying, managing, and mitigating quality risks throughout the lifecycle. Validate integration architecture across multiple systems, including APIs, microservices, and third-party platforms, ensuring testability is built into system design Assess and challenge architectural decisions that may compromise system stability … Waterfall) and integration into test management practices. Understanding of API technologies and integration patterns (synchronous, asynchronous, event-driven) with hands-on experience testing distributed systems and microservices architectures. Working knowledge of OWASP standards, common security vulnerabilities, and experience conducting or coordinating security testing including SAST, DAST, and penetration ...

Fullstack Engineer

Hiring Organisation
Randstad Digital
Location
Manchester, North West, United Kingdom
Employment Type
Contract
Contract Rate
£55 - £70 per hour
millions of travelers worldwide. As part of our Cars Search Experience Team , you will be at the heart of the customer journey-modernizing the systems that handle search requests, power real-time filtering, and drive global conversions. The Tech Stack We are in a high-growth phase, evolving … building and operating production-grade backend services. Frontend Fluency: Hands-on experience with modern React frameworks. Microservices Experience: A must-have understanding of distributed systems. Cloud Native: Familiarity with AWS (specifically SQS, Lambda, or EventBridge) is a significant plus. The Mindset: A pragmatic, detail-oriented engineer who is passionate ...