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Contract software engineer Greater London
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Onsite  (18)
Ganymede Solutions
04 Sep, 2026
Contract
PLC / Controls / Automation Engineer - Water Industry
£45.00 - £55.00 hourly
Ganymede Solutions London, UK
PLC / Controls / Automation Engineer Water Industry Location: London Rate: £45 £55 per hour Outside IR35 Initial Contract: 6 months extension highly likely PLC, Controls or EICA Engineer looking for your next contract? If you're a PLC Engineer, Controls Engineer, Automation Engineer, EICA Engineer or Control Systems Engineer with strong water industry experience, this could be an excellent opportunity to get involved in a technically interesting project in Leicester. We're looking for an experienced controls professional who can bring hands-on technical knowledge across PLC/SCADA, control systems, instrumentation and electrical engineering, supporting the delivery of a major water industry project. With a rate of £45 £55 per hour Outside IR35 and an initial 6-month contract with a strong likelihood of extension, this is well suited to an experienced contractor coming towards the end of a project or looking for their next challenge. The role You'll be working as part of a...
Rullion Managed Services
26 Sep, 2026
Contract
Senior Frontend Developer
£650 - £700 daily
Rullion Managed Services London, UK
Senior Frontend Developer (React Native) 6 Month contract 40 hours per week Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB About the Role We are looking for a highly experienced Senior Frontend Engineer to join a fast-paced and innovative engineering environment, helping to build and scale next-generation digital products and customer experiences. This is an opportunity to work on complex, high-impact applications used by both customers and internal stakeholders, while influencing technical strategy and engineering best practices. As a senior member of the engineering team, you will take ownership of critical frontend systems, mentor engineers across multiple levels, and drive technical decisions that balance business value with long-term maintainability. Key Responsibilities Lead the planning and delivery of complex frontend projects, translating ambiguous requirements into clear technical...
PCR Digital
22 Sep, 2026
Contract
Senior Platform Engineer (Cloud Media Platforms)
£450 - £470 daily
PCR Digital London, UK
Senior Platform Engineer (Cloud Media Platforms) Start ASAP (within 2-4 weeks notice) expected duration 6+ months initially London- Hybrid 2/3 days typically wfh/West London (Apply online only)pd Outside IR35 Must have right to work in the UK and be based near London. Senior Platform Engineer (Cloud Media Platforms) providing technical design and development/implementation of systems that industrialise media workflows. Acting as the primary technical authority for Cloud NAS integration, media ingest pipelines, & automated metadata scripting. Prior experience in the media broadcasting industry, specifically with digital asset management, Cloud NAS, and video ingest or similar workflows is required. You will need strong Cloud DevOps skill set, hands on scripting of either Python, Go, or Node.js for automation and API development, hands-on expertise with AWS (preferred) or GCP and Infrastructure as Code (Terraform) etc Senior Platform Engineer (Cloud Media Platforms)...
Pontoon
09 Sep, 2026
Contract
Senior Full Stack Developer
£700 - £750 daily
Pontoon London, UK
Adecco Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Job title: Senior Full Stack Developer (Front End - Java / Angular / Solidity) Location : London (5 days per week onsite) Contract: 12 months with possible extension Rate : 700 - 750 inside IR35 Overview We are looking for experienced Senior Full Stack Engineers to join a high-performing engineering team building and enhancing modern enterprise applications. This is a hands-on development role for engineers who enjoy working across the full technology stack, delivering scalable web applications, cloud-native services, and modern user experiences. The...
Adecco
24 Sep, 2026
Contract
Front Office Agile Project Manager
£800 - £900 daily
Adecco London, UK
Front Office Agile Project Manager (Contract) Duration: 12 Months (Possibility for extension) Location: London/Bromley/Hybrid (3 days per week on site) Rate: A highly competitive Umbrella Day Rate is available for suitable candidates Role Profile Our client, a leading organisation in the Investment Banking sector, is seeking a highly skilled Project Manager / Release Train Engineer (RTE) to support their Global Rates Risk technology organisation. The successful candidate will play a pivotal role in providing delivery management, planning, governance, and Agile leadership across a portfolio of strategic initiatives. Key Responsibilities: Collaborate closely with the lead for Rates Risk Technology to coordinate delivery across multiple teams. Drive alignment of priorities and roadmaps while ensuring clear visibility of progress, risks, and dependencies. Act as the central point of coordination for the global Rates Risk...
Apex Systems US
23 Sep, 2026
Contract
Data Centre Engineer
£28.00 - £32.00 hourly
Apex Systems US London, UK
Data Center Facility Engineer, Data Center Engineering Operations Location: LONDON, United Kingdom (Onsite) Role Overview Our organization is seeking a mechanically-biased Engineering Operations Technician to join our team. This hands-on role is focused on the installation, maintenance, and troubleshooting of mechanical cooling and water systems infrastructure across our data center portfolio. The ideal candidate must have a data center background and will work directly with air handling units, chillers, cooling towers, and associated water treatment plant. This is a shift-based role requiring flexibility to support 24/7 operations. Key Responsibilities Install, maintain, and repair pipework, fittings, valves, and manifolds across cooling distribution loops and water circuits. Operate and maintain air handling units (AHUs), chillers, cooling towers, evaporative cooling systems, and liquid cooling infrastructure. Perform pressure testing, leak detection, and...
Rullion Managed Services
23 Sep, 2026
Contract
BMS Design Engineer
Rullion Managed Services London, UK
Role: BMS Engineer - Design Location: London - Hybrid working Duration: 12 month initial contract Pay Rate: 400- 450 P/day OUTSIDE IR35 The BMS design engineer should fully understand the engineering requirements of building control systems for a range of building types, varying in complexity. Candidates will need a thorough understanding of both mechanical and electrical building systems and be able to work autonomously. The role will require experience of interpreting customer specifications to develop comprehensive designs and scope packages for individual disciplines including panel design, hardware configuration, field equipment, software configuration, graphic packages as well as installation and commissioning scope. Candidates must also be prepared to work flexibly as part of the team and be pro-active with modern technologies and best practice. Applicants should have engineering skills as detailed below: Electrical and Mechanical systems and plant knowledge, BMS...
Rullion Managed Services
19 Sep, 2026
Contract
BMS Design Engineer
Rullion Managed Services London, UK
Rullion is currently looking foor candidates for the following role for one of our global leading Smart Infrastructure Clients: BMS Design Engineer Location: London ASAP Start 6 months rolling contract Outside IR35 (Apply online only) Per day 8 Hours per day 40 hours per week DBS Required Are you looking for an opportunity to join a growing business leading the way in shaping the future of BMS and Energy Management systems? Our client is looking for an experienced BMS design engineer to provide BMS system designs, and project engineering delivery strategies, for large BMS projects. The BMS design engineer should fully understand the engineering requirements of building control systems for a range of building types, varying in complexity. Candidates will need a thorough understanding of both mechanical and electrical building systems and be able to work autonomously. The role will require experience of interpreting customer specifications to develop comprehensive...
VI
15 Sep, 2026
Contract
QA Tester - Must have Active SC Clearance
£400 - £500 daily
VIQU IT London, UK
QA / Test Engineer READ THIS BEFORE YOU APPLY You will be testing Kafka-based streaming data pipelines at genuinely enormous scale, and you will be writing the test strategy for the whole programme from a blank page. There is nothing in place today. If that sounds like the job you have been waiting for rather than a job with a gap in it, keep reading. WHO THE CLIENT IS Our client is a UK-headquartered AI company building sovereign AI capability for defence and national security. They have been established for around a decade and are one of the country's leading builders of AI for high-risk, high-assurance environments. Their platform is an AI operating system built entirely in the UK, designed for settings where security, trust and full infrastructure control are non-negotiable. It deploys across cloud, edge, on-premise and fully air-gapped systems, and is already live inside UK Defence and national security missions. They closed a substantial Series A round...
Ganymede Solutions
12 Sep, 2026
Contract
Commissioning Engineer - Automotive - Schneider
£40.00 - £50.00 hourly
Ganymede Solutions London Borough of Barking and Dagenham, UK
Commissioning Engineer Automotive - Schneider PLC - Dagenham - Contract We are currently recruiting an experienced Commissioning Engineer to support a major automotive manufacturing and automation project in Dagenham . This is a hands-on opportunity for an engineer with strong Schneider PLC experience , combining PLC software modifications, commissioning, fault-finding and live production-line support. Role Details Position: Commissioning Engineer Schneider PLC Location: Dagenham, Essex Rate: £40 £50 per hour Outside IR35 Contract: Contractor Hours: Monday Friday, 07 00 Weekend Support: Approximately 2 weekends per month The Role You will be working directly on automated manufacturing equipment, supporting commissioning activities and implementing PLC software changes within a live production environment. The role will involve: Developing and modifying Schneider PLC software Commissioning automated production equipment Fault-finding and...
DG
12 Sep, 2026
Contract
Threat Modelling Engineer
£400 - £500 daily
Damia Group Ltd London, UK
Threat Modelling Engineer Location: London Working Pattern: 4 days onsite / 1 day remote Contract: Initial 6-month contract Rate: 400 - 500 per day Damia Group is supporting a leading organisation in the delivery of a high-profile Cyber Security programme and is looking for an experienced Senior Threat Modelling Engineer to join the team in London. You will play a key role in identifying and assessing security threats, defining appropriate mitigating controls, and helping to continuously improve the organisation's threat modelling capability. This is a hands-on position combining Threat Modelling, Cyber Security, Cloud Security and Python development , with responsibility for delivering high-quality threat models while also supporting and mentoring more junior members of the team. Key Responsibilities Conduct Threat Modelling using established and documented methodologies. Apply techniques including STRIDE, PASTA, Attack Trees and MITRE ATT&CK...
Ganymede Solutions
12 Sep, 2026
Contract
PLC Controls Engineer - Automotive
£40.00 - £50.00 hourly
Ganymede Solutions London Borough of Barking and Dagenham, UK
PLC Controls Engineer Automotive - Contract - Dagenham We are currently recruiting 2 experienced PLC Controls Engineers for a major automotive manufacturing and industrial automation project in Dagenham . This is a hands-on commissioning role for experienced engineers who can hit the ground running in a live manufacturing environment, troubleshoot complex faults, modify PLC software and bring automated production equipment online. Role Details Position: PLC Controls Engineer Contractor Location: Dagenham Rate: £40 £50 per hour Outside IR35 Hours: Monday Friday, 07 00 Contract: Contractor Vacancies: 2 The Role You will be working directly on production-line equipment and automated stations as part of a major automotive automation project. The role will include: Siemens S7 PLC programming and commissioning Downloading and commissioning software onto live production equipment Testing sequences, safety circuits, I/O and automated processes Modifying...
Adecco
11 Sep, 2026
Contract
Desktop Support Engineer
£300.00 - £350.00 hourly
Adecco London, UK
Desktop Support Opportunities - London We are currently hiring for two Desktop Support opportunities with our client . While both roles focus on end-user support, they differ in terms of technical requirements and experience . Role Title: 1.Desktop Support Engineer AND 2.DEX TechBar & Desktop Engineer Pay Rate: 350 per day via Umbrella Contract: 6 months, with a strong possibility of conversion to a permanent position Location: London Monday-Friday shift rota About the Client: A leading global financial institution with a strong international presence and a reputation for excellence in banking and technology. This is an exciting opportunity to work within a global, technology-focused environment , supporting modern digital solutions and contributing to a high-quality employee experience across EMEA. DEX TechBar & Desktop Engineer A senior/technical role focused on Desktop Support and Endpoint Management. Key skills:...
Eden Brown
08 Sep, 2026
Contract
Senior Electrical Design Engineer
£45.00 - £55.00 hourly
Eden Brown London, UK
An excellent opportunity has arisen for an experienced Electrical Design Engineer to join a well-established building services consultancy in London on an contract basis outside IR35. This hybrid role will involve working as part of a multidisciplinary building services engineering team, supporting the delivery of electrical design solutions across a range of building projects. The successful Electrical Design Engineer will contribute to the development of electrical building services designs, technical documentation and coordinated BIM models. This role is based in the London office with hybrid working available, offering the chance to work on high-quality building services projects alongside experienced engineers and consultants. Key Responsibilities As an Electrical Design Engineer, your responsibilities will include: Producing electrical building services designs for a variety of building projects Developing electrical schematics, layouts and technical...
Rullion Managed Services
22 Sep, 2026
Contract
Senior Backend Developer
Rullion Managed Services London, UK
Location: London, EC1M 6PB Contract: 6 Month Contract Hours: Full-time, 37 hours per week Hybrid: 1 day per week onsite in London Rate: TBC Join a dynamic energy provider dedicated to delivering sustainable solutions across the UK. We are looking for an enthusiastic and resourceful Senior Backend Developer who is passionate about building exceptional products and developing robust, scalable solutions. This is an initial 6-month contract, with potential for extension. The role is full-time, 37 hours per week, with one day per week onsite in London. Accountabilities Play a pivotal role within the backend engineering team, helping to build cloud-based applications. Develop backend solutions using Python and AWS Cloud services. Adopt a serverless-first approach to application design. Collaborate within an Agile team alongside other backend engineers and product designers. Strategise, develop, test and deploy new features and experiments. Participate in...
Pontoon
17 Sep, 2026
Contract
Python Developer
Pontoon London, UK
Job Title: Python Developer (Backend) Location: Remote (Quarterly Planning Sessions in Bristol) Remuneration: 600 per day (Inside IR35 via Umbrella) Contract Details: Fixed Term Contract, Initial 6 Months with Multi-Year Extension Potential Responsibilities: Our client is seeking talented Backend Python Developers to join an innovative engineering team focused on building a brand-new service platform centred around CRM-related functionality. This is an exciting opportunity to contribute to a greenfield initiative, where the following responsibilities will be key: Design, develop, and maintain backend services using Python. Build scalable APIs and event-driven services that support customer-facing applications. Develop and optimise data solutions within AWS cloud environments. Collaborate with product, engineering, and frontend teams to deliver new platform capabilities. Contribute to architecture decisions and establish best practises for a strategic service....
Aspect Resources
16 Sep, 2026
Contract
Head of Private Office - SC
£500 - £550 daily
Aspect Resources London, UK
Job Title: Head of Private Office - SC Location: Hybrid - Birmingham, Bristol, Leeds, London, Manchester, Nottingham, Norwich or Swindon (2-3 days a week on site) Contract Duration : 13/3/27 Daily Rate: £550 per day IR35 Status: Inside Security Clearance: SC We are looking for a digitally optimised and authoritative individual who thrives in a fast-paced environment to lead the private office of a Director. You will be a confident communicator capable of giving direction at all levels, managing the flow of complex commissions, and setting the standard in your directorate, utilising the latest AI and collaboration tools to ensure seamless information exchange across the agency To act as the strategic engine and trusted advisor to the Director and the guardian of the Directorate s delivery. You are responsible for ensuring the Director s priorities are driven forward, integrating business operations, advising on sensitive issues and ensuring consistent join up across the...
RE
04 Sep, 2026
Contract
Senior Backend Developer
Rullion - Eon London, UK
Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at senior levels who are passionate about crafting exceptional products. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London. It is a full-time role, 37 hours per week. If this role feels right, send us your CV. Accountabilities: Playing a pivotal role in the backend engineering team, you will help to build full-stack cloud apps. You'll be using Python and AWS Cloud services on the backend. Adopt a Server-less first approach to application design, collaborating within an agile team alongside other backend engineers and product designers. Strategize, develop, test, and deploy new features and experiments. Engage in collaborative coding practices such as pair programming and code reviews within the team. Contribute...
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