1 to 25 of 26 Contract Distributed Systems Jobs in London

Lead Backend Software Engineer – Data Services Federated Data Services | Distributed Systems | Apache Spark | DataFusion | Python | Kubernetes Location: London (2 days per week onsite) Rate: £700–£800 per day (Outside IR35) Duration: Initial 6-month contract with likely extension Overview We're looking for an experienced Lead Backend Software … first principles, thrives in ambiguity, and can balance strategic architectural thinking with hands-on software engineering. This role is centred around designing and building distributed data services rather than traditional application development. Role & Responsibilities Lead the design and development of scalable, cloud-native data services supporting a federated platform. ...

Systems Engineer £600 - £675 Inside IR35 Hybrid (2 days a week onsite in London office) 6 month initial contract Long term programme (extensions likely) Help deliver complex modelling and decision-support software used across defence, infrastructure, energy and government. SR2 is supporting a software consultancy to bring … experienced Systems Engineer contractor to lead the design and delivery of scalable software solutions, working closely with customers, engineers and technical stakeholders. The role: Leading the technical delivery of customer projects Designing scalable, secure and resilient system architectures Translating customer requirements into practical technical solutions Working across cloud, integrations ...

Rate is available for suitable candidates Role Profile As a Senior Java Engineer, you will play a pivotal role in delivering resilient and secure systems that meet the demands of modern trading. You'll collaborate closely with product, trading, and infrastructure teams to create seamless end-to-end features … Core Java, multithreading/concurrency, and performance tuning. Low Latency Expertise: Proven experience in low latency design and patterns that enhance trading performance. Distributed Systems: Experience in designing and operating distributed systems, including microservices, event-driven architectures, and messaging/streaming solutions. Computer Science Fundamentals: Solid ...

working within modern engineering environments. Experience required Engineering Ownership - Takes responsibility for delivery end-to-end, including debugging, optimisation and production support. Microservices & Distributed Systems - Experience building scalable distributed systems with a focus on reliability, integration and performance. Event-Driven Thinking - Understanding of event-driven architectures … decoupled systems and real-time data flows. Architecture & Design - Contributes to solution design, applies engineering best practices and influences technical decisions. Seniority & Influence - Operates at Senior/Lead Engineer level, mentors others, challenges requirements and engages confidently with stakeholders. Enterprise Experience - Experience within complex enterprise environments. Financial services experience ...

highly engineering-led team working across Python development, AWS infrastructure, DevOps automation and cloud-native platform delivery. The environment is heavily focused around scalable distributed systems, modern CI/CD practices and cloud-native engineering capability. This is not a traditional enterprise development environment - they need engineers comfortable … responsibilities Designing and developing Python Back End services and APIs Building scalable cloud-native applications within AWS environments Developing event-driven and microservices-based systems Supporting CI/CD and automated deployment pipelines Working closely with DevOps, platform and cloud engineering teams Supporting secure and resilient distributed systems ...

Essential Skills Strong commercial experience with C#/.NET and Java (Spring Boot) . Proven delivery of microservices and REST APIs . Experience with distributed systems and enterprise integration. Strong SQL experience (SQL Server and/or Oracle). We're Looking For Engineering Ownership - Takes responsibility … delivery end-to-end, including debugging, optimisation and resolving production issues. Microservices & Distributed Systems - Strong understanding of scalable, distributed architectures and the challenges around reliability and performance. Event-Driven Thinking - Knowledge of event-driven architectures, decoupled systems and real-time data flows. Architecture & Design - Applies sound ...

with a strong emphasis on usability, user experience, and rapid iteration. Contribute to the enhancement and extension of an existing .NET-based platform and distributed computing architecture. Apply distributed computing principles to build scalable, resilient, and secure solutions. Integrate AI and machine learning capabilities into prototype applications, including … software engineering, R&D, or prototyping-focused roles. Strong experience developing applications within the Microsoft .NET ecosystem, including modern C# development. Experience working with distributed systems, distributed computing concepts, or actor-based architectures. Proven track record of delivering rapid prototypes, proofs of concept, or innovation-focused software ...

Engineer to join a high-performing engineering team delivering business-critical systems. This is a hands-on engineering role focused on building and evolving distributed backend systems in a high-performance environment. You will be working on a distributed calculation engine used for complex index-level computations … based on quantitative models. Distributed, manager-worker architecture Built using Scala and Python components High requirements around: o Performance o Accuracy o Security This is a feature development role, not BAU/support, with significant scope to influence system design and evolution. Role Responsibilities Design, build, and evolve core ...

initiatives, designing and delivering intelligent agent workflows that are scalable, reliable, secure, and enterprise-ready. You'll be responsible for building sophisticated multi-agent systems, integrating LLM capabilities into business processes, and ensuring robust governance, observability, and performance across the AI stack. Key Responsibilities Design and develop multi-agent … systems using frameworks such as Google ADK, LangChain, and LangGraph Build and maintain stateful workflows , orchestration layers, and agent decision-making processes Develop secure, scalable Python APIs and backend services that integrate with AI agents and enterprise systems Implement effective prompt engineering strategies , context management, memory handling ...

data streaming platform. You will be responsible for designing, building and optimising scalable event-driven solutions that enable reliable, high-performance data movement across distributed systems. Working closely with engineering, architecture and platform teams, you will help establish best practices for event modelling, stream processing and system integration within … systems. Strong understanding of: Event-driven architecture Data flow design Event modelling System decoupling Experience integrating streaming platforms within microservices ecosystems. Strong knowledge of distributed systems, messaging patterns and asynchronous processing. Experience designing scalable, resilient and highly available streaming solutions. Excellent problem-solving and communication skills. Desirable Skills ...

organisation, driving continuous innovation and delivering reliable, high-quality solutions to support critical business operations. The technology landscape includes HP NonStop (Tandem) systems and a distributed Linux-based messaging and communications infrastructure. The successful candidate will contribute across the full software development lifecycle, from design through to delivery … WebSphere MQ v9 Databases: Oracle 19 (SQL, PL/SQL, data modelling) Messaging & Data Formats: MRM, XML, JSON Integration Exposure Kafka HP NonStop systems SWIFT connectivity Required Skills & Experience Proven experience across the full software development lifecycle Strong **analysis, design andHeres a clean, fully anonymised and market-ready version ...

reviews and contribute to engineering best practices. Improve system reliability, performance and scalability. Work with cloud-native technologies and modern deployment practices. Support production systems and contribute to continuous improvement initiatives. Essential Skills & Experience Strong commercial experience with Java and Kotlin. Proven experience developing applications using Spring Boot. Strong … practices, testing and CI/CD. Excellent communication and problem-solving skills. Desirable Experience with Gradle. Experience working within Agile development teams. Knowledge of distributed systems and event-driven architectures. Contract Details Initial 2-month contract. Outside IR35. Hybrid working with office attendance in London every Wednesday. Immediate ...

Senior C++ Low Latency Engineer (Real Time Trading Systems) Inside IR35 | £800/day | Canary Wharf (Onsite) | 6-month initial (strong extension potential) We're building a Real Time trade monitoring and market data system operating across a distributed Linux environment, where latency, determinism, and throughput are critical … . This is a hands-on C++ engineering role focused on building and optimising the low-level systems that move and process trading data in Real Time. Key Skills Strong modern C++ (11/14/17) in production systems Deep experience in low/ultra-low latency ...

Backend Engineer to lead the evolution of a global platform supporting international expansion and acquisition integration. This role focuses on building and scaling transaction systems that enable global commerce, while evolving an existing real-time platform to support new markets. You will address backend capacity constraints and help design … senior engineering role requiring both high-quality delivery and strong technical leadership in ambiguous, high-scale environments. You will be expected to: Design scalable systems with correctness and failure modes considered from the outset Clarify and scope requirements before proposing solutions Make pragmatic trade-offs in system design, avoiding ...

software engineering experience, with deep expertise in: Core Java, multithreading/concurrency, performance tuning. Experience with low-latency design and patterns. 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. Comfortable integrating AI coding tools into daily development workflows. Excellent communication and stakeholder ...

frontend development experience with modern JavaScript frameworks Advanced knowledge of JavaScript (ES6+) Experience building and consuming RESTful APIs Strong understanding of software architecture and distributed systems Experience working within microservices environments Strong knowledge of MySQL and NoSQL databases such as MongoDB or Couchbase Experience with event-driven systems … modernising legacy applications Previous involvement in high-traffic, customer-facing platforms Key Responsibilities Design, develop, and maintain full-stack applications across frontend and backend systems Build responsive, scalable, and high-performance user interfaces Develop and maintain APIs and backend services using PHP and Laravel Deliver features from concept through ...

improvement initiatives. Key Responsibilities Design, develop and maintain full-stack applications using modern software engineering practices Build and enhance scalable backend services, APIs and distributed systems Develop AI-powered features, workflows and automation capabilities across business applications Work across the entire technology stack, from Angular front-end development … full-stack development experience across both front-end and back-end technologies Experience building and integrating APIs and microservices Knowledge of cloud-based and distributed application architectures Experience developing or integrating AI-enabled solutions, automation workflows, or generative AI capabilities Strong understanding of software engineering best practices, testing ...

Selenium Playwright Cypress API & Integration Testing Strong experience testing APIs, integrations, and microservices-based architectures. Experience designing end-to-end quality strategies for complex distributed systems. DevOps & CI/CD Experience working within DevOps environments. Strong knowledge of: Azure DevOps GitHub Actions CI/CD Pipelines Continuous Testing practices ...

compliance, and architectural standards Provide technical leadership and guidance to engineering teams Drive best practices across cloud architecture and delivery Oversee integration patterns across systems and services Support design reviews, governance forums, and assurance activities Collaborate with stakeholders to manage risks and dependencies Ensure solutions are optimised for performance … experience as a Solution Architect in complex programmes Strong background in cloud architecture (GCP preferred, AWS/Azure acceptable) Experience designing secure, scalable enterprise systems Strong understanding of integration patterns and distributed systems Experience producing architecture documentation (HLD/LLD) Strong stakeholder engagement and communication skills Experience ...

driving solutions from concept through PoC to production. You will work closely with data, cloud, and DevOps teams to deliver secure, scalable, and compliant distributed ledger solutions. The role: Lead end-to-end design and architecture of blockchain solutions (consensus models, data structures, APIs, security frameworks). Evaluate … Corda, or similar). Proficiency in smart contract development and modern programming languages (e.g. Solidity, Java, Python, Go, Rust). Experience designing and delivering distributed systems and API-driven architectures. Knowledge of cloud platforms (Azure, AWS, GCP) and DevOps practices. Strong understanding of security, cryptography, and regulatory considerations. ...

monitoring, logging and post incident learnings feeding back into the agent/tooling Observability (enablemen for automation) Required skills & Experience Senior SRE experience on distributed systems and batch/intraday workloads in a production environment. Strong Python Provable agentic AI experience showing Tool integration, guard rails, evaluation approach ...

/or Python writing numerically intensive code (not just scripting). Numerical Computing: Solid understanding of algorithm design, performance optimsation, memory management, and distributed systems. Domain Depth: Practical experience with cashflows, resets, curve frameworks (OIS, multi-curve), sensitivities, scenario risk, and regulatory measures. What This Role ...

enterprise integration strategies. Extensive experience designing event-driven architectures. Strong commercial experience with Kafka and event streaming platforms. Deep understanding of microservices architecture and distributed systems. API-first architecture using REST and asynchronous messaging patterns. Strong Java and Spring Boot background. Experience designing cloud-native integration platforms on AWS. … record delivering large-scale event-driven platforms using Kafka. Experience leading architecture across multiple engineering teams. Strong background in cloud-native software engineering and distributed systems. Comfortable operating as both a strategic architect and a hands-on technical leader. Reasonable Adjustments: Respect and equality are core values to us. ...

code using Open Policy Agent (OPA). Strong understanding of OAuth2, OpenID Connect (OIDC), SAML and SCIM. Experience securing cloud-native, API-driven and distributed systems. Knowledge of threat modelling, security non-functional requirements and security assurance. Experience integrating with enterprise identity providers and IAM platforms. Ability to produce ...

backend engineer owning complex services in production. Production-level expertise in Go and/or Java. Experience building or maintaining high-volume, low-latency distributed systems. Strong API design skills. Hands-on experience with AWS cloud-native deployment. A systems-thinking approach to performance, correctness, and failure modes … send your CV to Yogeshwari . sen @ randstaddigital. com along with a brief note on your experience with Go/Java and high-volume distributed systems. Randstad Technologies is acting as an Employment Business in relation to this vacancy. ...