14 senior software engineer jobs found

Senior Software Engineer – Python/C++ - London Inside IR35 - £650 - £900 a day – April Start Hexwired Recruitment has recently partnered with a highly successful solutions provider based in London now seeking Several Senior Software engineers with experience using C++ and/or Python for Digital Transformation projects. This is a government level project, will last at least a year and you will be working in the national security space. Due to the nature of the role, the work is in onsite in London. Candidate must already have Active DV clearance. Key Skills * Degree in CS, Maths, Physics or similar * 5+ years C++ or Python experience * Previous experience working on Digital Transformation projects * Experience working to CI/CD processes * Previous experience working on Defence, NI and Government projects * Active DV clearance is essential Inside IR35, flexible on rate and looking for starters in April. If you’re interested, please apply. For more information...

Senior Software Engineer (DevSecOps) Contract | Inside IR35 | Up to £580/day | Full-time | North Yorkshire (1 day per week on-site, increasing from September) You will join a global IT consultancy delivering digital transformation to a well-established financial services organisation . You will be an experienced Senior Software Engineer with a strong DevSecOps background to join an engineering enablement function on an initial contract running to the end of December 2026. This is a hands-on role at the centre of modernising how software is built, delivered, and operated. You will work within a squad environment, driving adoption of Golden Path patterns, progressive delivery practices, and secure-by-design principles - with a clear focus on measurable outcomes. The role You will take ownership of the full delivery lifecycle: from pipeline design and environment architecture through to release-linked observability and incident readiness. Day to day, you can expect to be shipping...

Job Title: Senior Software Engineer in Test Type: Inside IR35 Contract Rate: £600-£650 per day Duration: 6 months minimum (likely to extend) Location: London - 3 days on site (Canary Wharf)  A large fintech business are looking for a senior-level quality engineer with a strong software engineering mindset to help shape and safeguard new platform capabilities across complex workflow-driven systems on a contract-basis. This role sits embedded within product engineering, operating in a shared ownership model alongside Java and React developers, with a heavy emphasis on automation. What you’ll be doing Building and maintaining automated coverage across the stack, from APIs through to user journeys, using established internal tooling and frameworks. Evolving existing test frameworks where required, while staying aligned with core engineering standards. Working closely with frontend and backend engineers to ensure critical paths are well understood, well tested, and production-ready....

Our client has an opportunity for a Senior Software Engineering Manager to join them on a contract basis. Reporting to the System Design Manager, you will be responsible for the management and day-to-day activities of the software team, collaborating with other disciplines and managers in all areas of the business. Role: Senior Software Engineering Manager Location: Farnborough - fully onsite Hours: 37 per week Hourly Rate: £52.17 per hour via Umbrella, inside IR35 Clearance: BPSS required before starting What you'll be doing: Team Leadership: Lead the day to day activities of the software team, taking responsibility for delivering the agreed team goals. Skills Development: Develop the team's personal and professional skills, acting as a mentor and coach to the team members. Team growth: Be part of the recruiting team seeking new talent as the team grows. Be accountable for the planning, design, development, verification and integration of the software for the...

Senior Manager, Software Engineering Location: Farnborough (On‑Site) Industry: Aerospace / High‑Altitude Platforms / Safety‑Critical Systems Contract: 6 Month inside IR35 Rate: £52ph Lead the software engineering function behind next‑generation, high‑altitude aerospace technology. I'm recruiting on behalf of an innovative aerospace organisation developing world‑leading, solar‑powered, high‑altitude platforms designed for ultra‑long‑endurance flight. Operating above 60,000 ft, these platforms enable mission‑critical applications including direct‑to‑device connectivity, high‑resolution Earth observation, environmental monitoring and global‑scale humanitarian operations. This is a rare opportunity to step into a high‑impact leadership position within a rapidly growing and genuinely pioneering engineering environment. The Role: Senior Manager, Software Engineering As the Senior Manager for Software Engineering, you will lead an expanding team responsible for the full software...

Back End Software Engineer - SC Cleared Contract | Remote (occasional London travel) | £450/day (inside IR35) We're recruiting on behalf of a major government technology programme for a senior software engineer to help design and evolve high-performance, cloud-based systems that support critical public services. This is a hands-on technical role with real influence - you'll contribute to architecture decisions, mentor colleagues, and own complex integrations end-to-end. Working within an Agile squad, you'll lead technical design discussions, manage CI/CD pipelines, and play an active role in incident and change management, all within a modern Azure cloud environment. What you'll need Angular - component architecture and state management Node.js - async programming and API/backend services Azure - designing and managing scalable cloud infrastructure Terraform - infrastructure as code and environment automation Jenkins - CI/CD pipelines and automated testing Git - branching...

Senior Infrastructure Engineer Location: Remote (with occasional site visits) Rate: £45-50 per hour (inside IR35 with possibility of outside) Hours: 37.5 hours per week Contract Type: 6-month contract About the Opportunity: We are seeking a highly skilled Senior Infrastructure Engineer for a 6-month contract. This role offers a competitive hourly rate of £45-50 per hour and the flexibility of remote working for most of the week, with occasional site visits as required. You will play a key role in the delivery of infrastructure projects, particularly focusing on drainage design, highways, and network modelling. Key Responsibilities: ·Lead the design and delivery of infrastructure projects, focusing on drainage systems and highways. ·Utilise Civils 3D, InfoDrainage, and other relevant software to develop drainage and highway models. ·Ensure compliance with industry standards, SAB drainage design, and Welsh drainage design (where applicable). ·Collaborate closely with...

Senior Systems Engineer Livingston or Glenrothes (Hybrid – minimum 3 days onsite) – 12 months (Inside IR35) BPSS needed (SC is ideal) Overview An exciting opportunity for an experienced Senior Systems Engineer to join a high-performing Weapons & Sensors engineering team, supporting the delivery of complex programmes for UK-based customers. Reporting to the Senior Programme Manager within the Power Development Team, the role spans the full product lifecycle and involves working within a collaborative, multi-disciplinary environment using modern digital engineering approaches. This position offers strong professional development opportunities within a growing defence-focused engineering environment. Key Responsibilities * Requirements Management: Capture, analyse, and manage system requirements, ensuring they are clearly defined, verifiable, and traceable throughout the lifecycle. * System Design: Develop and optimise system architectures and components, balancing...

Overview A leading engineering organisation is seeking an experienced Piping Stress Engineer to support a major nuclear civil decommissioning programme. This role is central to ensuring safe, compliant, and efficient piping system design within a highly regulated environment. The successful candidate will collaborate closely with multidiscipline engineering teams, providing technical expertise across stress analysis, flexibility assessment, support design, and compliance verification. Key Responsibilities Stress & Flexibility Analysis Identify stress-critical lines through detailed review of P&IDs and line lists. Perform piping stress analysis using recognised industry software (e.g., CAESAR II / AutoPIPE). Evaluate nozzle loads, support loading, thermal expansion, vibration issues, and system flexibility. Conduct static and dynamic analyses, ensuring systems meet functional, safety, and engineering design requirements. Design & Technical Review Review and...

Java Developer Contract: 12 months Rate: £600 per day (Inside IR35) Location: UK (Remote some days in London, Manchester or Leeds (adhoc) This role sits within a large-scale NHS digital transformation programme delivered via a leading consultancy partner. The programme focuses on modernising critical healthcare systems, improving access to services, and enabling seamless integration across national and local platforms. The work involves building scalable, secure, and interoperable digital services that support high-volume user interactions and integrate with multiple systems across the healthcare ecosystem. The Role As a Java Developer, you will be responsible for designing, building, and maintaining high-quality backend services within a complex, distributed system. You will work closely with product, architecture, and engineering teams to deliver robust, scalable solutions that meet both user and system requirements. Key Responsibilities * Design, develop, and...

2nd Line Desktop Engineer (Contract) Location: Cheltenham (On-site, full-time) Rate: Up to £250 per day (Inside IR35) Contract: 3 months Our client, a leading organisation in their sector, is hiring a 2nd Line Desktop Engineer to provide on-site technical support and break-fix services across a busy operational environment. This role offers the opportunity to work in a hands-on support capacity, resolving issues directly with end users and ensuring minimal disruption to business operations. What you’ll do * Provide 2nd line desktop support across hardware and software environments * Deliver break-fix support for laptops, desktops, and peripheral devices * Support Microsoft 365 applications and user administration * Assist with basic networking issues (connectivity, patching, troubleshooting) * Support hybrid environments, including on-prem and cloud-based systems You’ll work closely with IT support teams and business users to maintain high service levels and...

DV Cleared Software Engineer (DBA / Data-Focused) Contract: 12 months Location: Cheltenham (5 days per week onsite, occasional travel to Gloucester) Rate: £550 - £750 per day (Umbrella, Inside IR35) Must hold live UKIC DV clearance used within the last 12 months About the Role An exciting opportunity has arisen for an experienced Software Engineer with a strong DBA background to support a growing national security programme based in Cheltenham. This role sits within a high-performing technical team delivering solutions that have real-world impact across the UK Government sector. You'll work on data-focused systems, contributing across the full software lifecycle while supporting and improving secure Oracle-based platforms and automation using Ansible. Key Responsibilities Design, develop, test, document and support software components within a secure system environment Provide accurate estimates for development effort from given specifications Work with a strong focus on...

World Class Defence Organisation is currently looking to recruit a Technical Author subcontractor on an initial 12 month contract.  The role will be predominately working remotely from home.   Rate: £43.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role will be 2 or 4 days per month in the office and the rest remote.  (some flexibility on this may be needed). Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: 2 Stage interview process. Initial Virtual or onsite – 2hrs. Author Test & meet the team - onsite for successful candidates.   Technical Author Job Description: To write technical documentation in Standard Generalised Mark-up Language (SGML), Extensible Mark-up Language (XML) and traditional formats for the Company's products in accordance with...

World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a High Speed Digital Design Engineer subcontractor.   Rate: £58.00 - £80 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role can be a mix of onsite and remote working Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview   Job Description: As part of a large team of analogue and digital electronics design engineers, you will be responsible for the electronics design and development of high speed MPSoC FPGA and AI hardware solutions targeting SDR, radar signal processing and sensor fusion applications. As Digital Design Engineer you will support the Technical Lead/Architect in collaboration with the systems, software, firmware, mechanical and...