81 senior systems engineer jobs found

Senior Systems Engineer – Microsoft & VMware   £400–£500 per day | Outside IR35 6-month contract with extension potential Hybrid working   Join a globally recognised MedTech and life sciences organisation whose technology supports scientific innovation, diagnostics and products that improve human health. With operations spanning multiple countries, this is an opportunity to work within a complex global enterprise infrastructure environment.   This is a hands-on Senior Infrastructure Engineer role focused on VMware and Microsoft enterprise infrastructure , including Windows Server, Azure, Active Directory/Entra ID, Microsoft 365 and Dynamics. A key focus will be supporting a major tenant-to-tenant migration , alongside wider infrastructure transformation and global site transitions across cloud and on-premises environments.   This is a fantastic opportunity for a seasoned infrastructure...

Senior Systems Engineer – Microsoft & VMware (Multiyear migration)   £450–£550 per day | Outside IR35 6-month contract with extension potential Hybrid working   Join a globally recognised MedTech and life sciences organisation whose technology supports scientific innovation, diagnostics and products that improve human health. With operations spanning multiple countries, this is an opportunity to work within a complex global enterprise infrastructure environment.   This is a hands-on Senior Infrastructure Engineer role focused on VMware and Microsoft enterprise infrastructure , including Windows Server, Azure, Active Directory/Entra ID, Microsoft 365 and Dynamics. A key focus will be supporting a major tenant-to-tenant migration , alongside wider infrastructure transformation and global site transitions across cloud and on-premises environments.   This is a fantastic opportunity for a...

Senior Systems Engineer – Microsoft & VMware (Multiyear migration) £400–£500 per day | Outside IR35 6-month contract with extension potential Hybrid working Join a globally recognised MedTech and life sciences organisation whose technology supports scientific innovation, diagnostics and products that improve human health. With operations spanning multiple countries, this is an opportunity to work within a complex global enterprise infrastructure environment. This is a hands-on Senior Infrastructure Engineer role focused on VMware and Microsoft enterprise infrastructure , including Windows Server, Azure, Active Directory/Entra ID, Microsoft 365 and Dynamics. A key focus will be supporting a major tenant-to-tenant migration , alongside wider infrastructure transformation and global site transitions across cloud and on-premises environments. This is a fantastic opportunity for a seasoned infrastructure professional to become a key contributor within...

Senior Systems Engineer – Microsoft & VMware   £400–£500 per day | Outside IR35 6-month contract with extension potential Hybrid working   Join a globally recognised MedTech and life sciences organisation whose technology supports scientific innovation, diagnostics and products that improve human health. With operations spanning multiple countries, this is an opportunity to work within a complex global enterprise infrastructure environment.   This is a hands-on Senior Infrastructure Engineer role focused on VMware and Microsoft enterprise infrastructure , including Windows Server, Azure, Active Directory/Entra ID, Microsoft 365 and Dynamics. A key focus will be supporting a major tenant-to-tenant migration , alongside wider infrastructure transformation and global site transitions across cloud and on-premises environments.   This is a fantastic opportunity for a seasoned infrastructure...

🚀 Senior C# Developer – Investment Banking £750/day | Outside IR35 | 12-month rolling contract | Largely Remote I’m working with a leading investment bank looking for a strong Senior C# Developer to join a long-term project building and enhancing a large-scale Structured Notes platform . This is a hands-on engineering role with approximately 80% backend C# / 20% frontend , working on complex, distributed systems. The role: You’ll be working across a modern .NET platform, designing and developing scalable backend services while contributing to the Angular frontend where required. The environment involves large-scale distributed systems, asynchronous processing, multithreading and event-driven architecture. Core technical requirements: • Excellent C# / .NET development experience • Strong .NET 8 knowledge • Previous commercial Event Sourcing experience – essential • Strong understanding of multithreading, concurrency and asynchronous...

Interim Software Engineering Manager 6-month contract | c. £500 per day | Outside IR35 | Hybrid, Oxfordshire Are you a senior software leader who can quickly understand complex systems? Do you enjoy combining architecture, hands-on engineering and technology strategy? Would you like the opportunity to shape the next phase of a growing software capability? Our client, an innovative technology-led engineering organisation, is seeking an Interim Software Engineering Manager for an initial six-month contract. This is a high-impact assignment for someone who can provide technical direction, strengthen engineering practices and help turn long-term business goals into a practical software roadmap. Why This Role Is Great: You will have the opportunity to: Take ownership of the technical direction and evolution of a complex software platform. Work closely with senior leaders to align software architecture, delivery priorities and wider business...

Senior Backend Engineer - Node.js / TypeScript 12-Month Contract Fully Remote Outside IR35 We’re looking for a Senior Backend Engineer to join an exciting fintech business, working on highly scalable, mission-critical financial systems. The role is heavily focused on Node.js, TypeScript and AWS , with genuine ownership across the full lifecycle — from system design and architecture through to development, release and production support. You’ll have the opportunity to work on new products and capabilities from an early stage , making key technical decisions and helping shape how the platform evolves. What you’ll be working on Design, build and operate reliable, scalable backend services Own areas of the platform, including architecture and technical direction Build resilient APIs and distributed systems within a regulated financial environment Work with AWS serverless technologies , including Lambda, SQS, EventBridge and API Gateway Work with MongoDB and...

Location: Basildon (3-5 days per week onsite) Duration: 6 month contract Rate: £73.40ph LTD (Outside IR35) Role details: We are looking for an experienced Network Engineer to support our defence client on a contract basis. This is not a traditional enterprise networking role. We're particularly interested in candidates who have worked within systems integration, integration & test, trials, or mission click apply for full job details

Senior Backend Engineer - Node.js/TypeScript 12-Month Contract | Fully Remote | Outside IR35 We're looking for a Senior Backend Engineer to join an exciting fintech business, working on highly scalable, mission-critical financial systems. The role is heavily focused on Node.js, TypeScript and AWS , with genuine ownership across the full lifecycle — from system design and architecture through to development, release and production support. You'll have the opportunity to work on new products and capabilities from an early stage , making key technical decisions and helping shape how the platform evolves. What you'll be working on Design, build and operate reliable, scalable Back End services Own areas of the platform, including architecture and technical direction Build resilient APIs and distributed systems within a regulated financial environment Work with AWS serverless technologies , including Lambda, SQS, EventBridge and API Gateway Work with MongoDB and...

We are seeking a passionate Software Engineering Manager who will provide technical expertise and operate with excellence. Being creative, curious, and confident, you will be an integral part of our empowered, self-managing, multi-disciplinary engineering teams - designing, building, releasing, and maintaining products. You will play a key role in driving our ambition to create a best-in-class software engineering team, environment, and culture. This is an initial 12 month contract (outside IR35) that requires you to work on client site 3 days a week in London, Paddington. Requirements Your key accountabilities will include: Team Management: Build, mentor, and manage a high-performing software engineering team. Foster a culture of collaboration, innovation, and continuous improvement within the team. Facilitate communication and collaboration among team members. Ensure budgets, people and resource allocation, and workload, balance across projects. Agile...

Opportunity for a Senior Product Engineer to work remotely for a UK based AI scale-up on an initial 6-month contract outside IR35. You'd join a product-focused engineering org and would be part of an autonomous team responsible for building cloud-native, event-driven systems from 0-1 in a collaborative DevOps environment. Required experience: Clear end-to-end ownership (discovery → delivery → validation) Strong product thinking (customer value, not just implementation) Evidence of iterative delivery (MVPs, feedback loops, prioritisation) Ability to work with ambiguity and challenge requirements Tech: Python FastAPI, Django, Vue MongoDB, PostgreSQL Kubernetes GCP In return they're offering a remote-first 6-month remote contract outside IR35 paying up to £700pd. If you're interested and would like to know more, please apply through this advert and I'll be in touch.

A leading company is hiring a AI Platform Engineer (MLOps/GenAI). Hybrid position - 6-month rolling contract, paying up to £1100 per day, Outside IR35 depending on experience. Experience and skills required for the AI Platform Engineer (MLOps/GenAI) Experience building, deploying, and maintaining machine learning and generative AI solutions (e.g., LLMs, embeddings, retrieval patterns, vector search, model fine‑tuning). Strong MLOps knowledge across continuous integration, deployment, monitoring, and evaluation of AI/ML models. Experience with AI infrastructure (orchestration pipelines, GPU compute, model hosting services) and scalable AI data structures (including vector databases/semantic search). Deep software engineering capability in .NET Core/C# and modern back-end engineering, with flexibility to work across languages such as Python, Go, or TypeScript. Strong understanding of distributed systems, microservices, cloud-native patterns, and modern data stores...

A leading business is hiring a Agentic AI Developer. Hybrid position. 12-month rolling contract, paying up to £1000 per day, depending on experience. Experience and skills required for the Agentic AI Engineer, Agentic AI Developer, Python Fluency with modern ML toolchains (PyTorch/JAX, agentic frameworks, MCP). Experience with AI agent ecosystems using frameworks such as LangChain, AutoGen, CrewAI, and Semantic Kernel. Solid software-engineering fundamentals - tested, documented, maintainable Python Familiarity with libraries such as TensorFlow, PyTorch, LangChain, or Ray is a plus. Exposure to Knowledge Graphs (Neo4j / RDF / graph-based enrichment or retrieval). Experience with either Docker, Kubernetes, cloud (AWS / Azure) Experience integrating LLM APIs (OpenAI or similar), with prompt design and orchestration. Hands-on experience training and deploying learned policies for complex behaviours in robots or simulated characters is a bonus Ability to write...

Opportunity for a Senior Product Engineer to work remotely for a UK based AI scale-up on an initial 6-month contract outside IR35. You'd join a product-focused engineering org and would be part of an autonomous team responsible for building cloud-native, event-driven systems from 0-1 in a collaborative DevOps environment. Required experience: Clear end-to-end ownership (discovery → delivery → validation) Strong product thinking (customer value, not just implementation) Evidence of iterative delivery (MVPs, feedback loops, prioritisation) Ability to work with ambiguity and challenge requirements Tech: Python FastAPI, Django, Vue MongoDB, PostgreSQL Kubernetes GCP In return they're offering a remote-first 6-month remote contract outside IR35 paying up to £700pd. If you're interested and would like to know more, please apply through this advert and I'll be in touch.

Opportunity for a Senior Fullstack Engineer to join a software consultancy as they go through a scale-up following a number of significant project wins in the iGaming industry. The company is at the forefront of AI-native software engineering, they employ over 500 people and have a strong presence across the UK. As a Senior Fullstack Engineer, you'll join a product-based team with a "you build it, you run it" mentality, owning all aspects of the systems you work on, from design through to deployment and supporting them in production. Skills: Java and Spring Boot TypeScript (Vue or React) REST APIs and Kafka event-driven systems AWS (including S3, Lambda, ECS, EKS, MSK) TDD, CI/CD and IaC Observability AI assisted engineering In return they're offering a remote-first 6-month contract outside IR35 that's paying up to £500pd. To be suitable for this role you must be UK based have prior experience in the iGaming, betting or FS industries. If you're interested and...

Senior JavaScript Engineer contract - Outside IR35 - £575 per day Leading Ecommerce client is now recruiting a talented Full Stack JavaScript Developer' who is proficient in front and Back End development. (React/Node.js), with an emphasis on Back End Node work initially. This role will be joining their platform team, designing, and building the foundations of which our clients innovative web and mobile applications run on. What will a day in the role entail? Working as an integral part of an agile team contributing towards the planning and development of systems/platforms. Collaborating with engineers, product owners and business analysts to define solutions, ways of working and share knowledge across the department. Reviewing code and providing support to members of your team. Working on client-facing applications in react/next.js Designing and building Node.js/GraphQL APIs. The ideal Senior JavaScript Engineer Senior level experience in modern...

Location: London (once a month) Department: Engineering Employment Type: Contract - Outside IR35 Contract Length: 6 months (with potential for extension)   About YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done.   About the role: As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious,...

C# / .NET / SQL   Remote + adhoc onsite in South West office Outside IR35 Start ASAP C# | .NET | SQL Server | PowerShell | Azure Data Factory   We’re looking for a strong Senior or Lead Software Engineer to join a small, experienced development team responsible for a range of business-critical applications and systems. This is a hands-on engineering role combining application development with complex data and problem-solving. You’ll be working across C#/.NET applications, SQL Server databases and system integrations, getting underneath issues to understand not just the code, but the data and business processes behind it.   The Role: Develop and maintain applications using C#, .NET and SQL Server Investigate and troubleshoot issues across both application and database layers Work with complex relational and transactional data Understand how data flows between different systems and identify...

Interim Software Engineering Manager 3-month contract | c. £500 per day | Outside IR35 | Hybrid, Oxfordshire Are you a senior software leader who can quickly understand complex systems? Do you enjoy combining architecture, hands-on engineering and technology strategy? Would you like the opportunity to shape the next phase of a growing software capability? Our client, an innovative technology-led engineering organisation, is seeking an Interim Software Engineering Manager for an initial six-month contract. This is a high-impact assignment for someone who can provide technical direction, strengthen engineering practices and help turn long-term business goals into a practical software roadmap. Why This Role Is Great: You will have the opportunity to: Take ownership of the technical direction and evolution of a complex software platform. Work closely with senior leaders to align software architecture, delivery priorities and wider business...

Senior Android Engineer (Contractor) Location: Manchester city centre, 2 days/week onsite + remote 3 days/week Contract: Initial 3-4 month contract (strong likelihood of extension) Rate: £400-500 (Outside IR35) Start Date: Early October Overview Are you looking to make a genuine, visible impact in a short window rather than settle into a long slow ramp-up? This role offers exactly that. We're looking for an experienced Senior Android Engineer to join the Digital Engineering team of a well-known UK consumer brand, on a hands-on delivery contract supporting a significant new customer-facing proposition. The Android app is a modern, Kotlin-first, Jetpack Compose-only application built on multi-module clean architecture, with an established in-house permanent engineering team already in place. This is a genuine delivery role for someone who can get up to speed fast, ship high-quality software without unnecessary ceremony, and leave the codebase in a better state than they found...