1 to 25 of 29 Contract Software Engineer Jobs in the South East

World Class Defence Organisation is currently looking to recruit a C#/C++ Software Engineer subcontractor on an initial 12 month contract. The department are happy to consider candidates with a mixture of C# and C++ or someone with just C# experience. Job Title: C#/C++ Software Engineer Rate: £65.00 per hour Location: Stevenage Hybrid … per week will be calculated at time and a quarter Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) C#/C++ Software Engineer Job Description: WSSE are integral in the development of weapon systems and system architectures, and as a result we have developed a capability supporting developments across the … work as part of a heterogeneous agile development team, made up of mixed discipline engineers working in synergy to develop simulations and representations of real equipment. Our approach to software development includes Configuration control Continuous Integration Continuous Delivery or Deployment. Unit testing and test driven development. Skillset/experience required: Proficient in C#/C++ Microsoft Visual Studio, Eclipse More ❯

Software Engineer - Remote - 6 months - up to £500 per day (Outside IR35) Our client is looking for a Software Engineer to transform commercial real estate with an AI-powered platform that automates workflows, integrates seamlessly with Microsoft 365, and delivers smarter, scalable processes. What You'll Do: Develop back-end services and APIs powering AI automation … PowerPoint. Collaborate with the founding team to streamline data processing and reporting. Mentor engineers and help shape the platform's architecture. What We're Looking For: 4+ years in software engineering (start-up or SaaS preferred). Strong Python & C# skills; API and cloud architecture experience (Azure a plus). Experience with Excel add-ins or Office JS APIs More ❯

Software Engineer Special Purpose Machinery Milton Keynes (On-site) 12-month contract Outside IR35 available We re supporting a special purpose machine builder in Milton Keynes with the appointment of three Software Engineers for a long-term contract assignment. This is an opportunity to join a growing engineering team delivering complex automation projects for high-precision machinery. … IR35). Location: On-site in Milton Keynes, Monday to Thursday. Remote: Fridays are remote working. Duration: Initial 12-month contract with potential extension. If you're an experienced software engineer looking for a technically engaging contract in the automation or machinery sector, this could be a great fit. More ❯

World Class Defence Organisation based in Stevenage is currently looking to recruit an Embedded C Software Engineer subcontractor on an initial 6 month contract. This role can be worked on a 4 day week basis. Hourly Rate: £68.00ph (Umbrella). Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at time and a … . Duration: 6 Months with very likely extension. Contracts are often ongoing and long-term thereafter. IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview Embedded C Software Engineer Job Description: Join a growing Software team in Stevenage, working as part of a dynamic team to develop, test and deliver innovative solutions by exploiting a … wide portfolio of software technologies. You will work as part of a small team and be empowered to work individually with little supervision. You will need to be able to work independently and be self driven whilst providing some technical leadership. You will need to be very proactive and comfortable working with teams outside of the SW department, and More ❯

Software Engineer - Embedded Systems (Safety-Critical) ?? Stevenage | Onsite (some hybrid flexibility) ?? £70 per hour via umbrella | 6-month contract (extensions likely) Overview A leading defence technology company is seeking a skilled Software Engineer to join their development team in Stevenage. You'll play a key role in designing and delivering safety-critical, real-time embedded software for next-generation missile and defence systems. This is a hands-on role working across the full software development lifecycle - from requirements and design through to testing, verification, and delivery. Key Responsibilities Develop, test, and verify embedded software in C/C++ for safety-critical real-time systems. Work across the full software lifecycle, including requirements … systems, electronics, and integration engineers. Ensure compliance with safety-critical standards such as DO-178C Level B or equivalent. Skills & Experience Required Essential: Proven experience developing bare-metal embedded software in C/C++. Strong understanding of the full software lifecycle, including requirements and verification. Experience with requirements management and version control tools (e.g., DOORS, GIT, RTC). More ❯

C# Software Engineer About the Role: We are seeking an experienced Embedded Software Engineer to develop safety-related real-time application software for next-generation systems. This is a hands-on role covering the full software lifecycle, from architecture and design to implementation and testing. Key Responsibilities: Design, implement, and verify embedded software … management processes. Conduct unit testing and code coverage analysis using industry-standard tools. Collaborate with multidisciplinary teams in a lab environment. Essential Skills: Strong experience in bare-metal embedded software development using C/C++. Knowledge of safety-critical standards (e.g., DO178C Level B, SIL-4). Familiarity with tools such as DOORS, LDRA, RAPITA, and configuration control systems More ❯

Embedded Software Engineer About the Role: We are seeking an experienced Embedded Software Engineer to develop safety-related real-time application software for next-generation systems. This is a hands-on role covering the full software lifecycle, from architecture and design to implementation and testing. Key Responsibilities: Design, implement, and verify embedded software … management processes. Conduct unit testing and code coverage analysis using industry-standard tools. Collaborate with multidisciplinary teams in a lab environment. Essential Skills: Strong experience in bare-metal embedded software development using C/C++. Knowledge of safety-critical standards (e.g., DO178C Level B, SIL-4). Familiarity with tools such as DOORS, LDRA, RAPITA, and configuration control systems More ❯

Embedded C Software Engineer Location: Stevenage Contract: 6-Month Contract (Likely Extension) Rate: £51.98/hour PAYE (£59.54/hour incl. holiday) or £68/hour Umbrella We seek an engineer who has worked in a military/defence environment/industry within the last 12 months or who is capable of obtaining security clearance (SC level … minimum) Overview This engineering role focuses on the development and implementation of embedded C software solutions for real-time systems. The successful candidate will work on-site within a collaborative engineering environment, contributing to the design and programming of embedded systems operating on bare-metal and real-time operating systems. Key Responsibilities Design and develop embedded software using … C for real-time applications. Implement and debug bare-metal software solutions. Develop software within real-time operating systems such as FreeRTOS. Apply UML methodologies for structured software design. Manage and trace software requirements using DOORS. Support testing, integration, and validation of embedded software. Collaborate with multidisciplinary engineering teams throughout the software lifecycle. Ensure software More ❯

Senior Software Engineer – TypeScript – GovernmentWe’re looking for a Senior Software Engineer to design, build, and deliver secure, scalable digital services for the UK public sector. You’ll develop cloud-native systems using TypeScript, AWS, and modern frameworks, ensuring high performance, resilience, and compliance.Key Responsibilities Develop and maintain applications using TypeScript with Express or Fastify. Build … Mocha, Jest, AWS SAM). Apply security and performance best practices throughout development. Essential Skills & Experience Experience in government or GDS-aligned projects. 5+ years’ experience in large-scale software engineering. Strong in TypeScript, JavaScript, Express/Fastify, and AWS. Expertise in Terraform, IaC, and microservice architectures. Hands-on experience with CI/CD, Docker, and automated testing. Strong More ❯

World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit an Embedded ADA Software Engineer subcontractor on an initial 12 month contract. The role will likely be required to be onsite, but it can be worked on a 4-day week basis. Hourly Rate: £70.00ph (Umbrella). Overtime Rate: Hours worked over the standard … . Duration: 6 Months with very likely extension. Contracts are often ongoing and long-term thereafter. IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview Embedded ADA Software Engineer Job Description: Join the growing Software team in Stevenage, working as part of a dynamic team to develop, test and deliver innovative solutions by exploiting a … wide portfolio of software technologies. You will work as part of a small team and be empowered to work individually with little supervision. You will need to be able to work independently and be self driven whilst providing some technical leadership. You will need to be very proactive and comfortable working with teams outside of the SW department, and More ❯

Backend Software Engineer (AI) £750 - £800 per day 2 days onsite We're working with a global healthcare and AI research organisation that's pioneering the use of advanced Machine Learning to accelerate the discovery and delivery of life-changing treatments. Their vision is to enable faster, personalised therapies that improve patient outcomes worldwide - and they're seeking … a Backend Software Engineer to help bring that mission to life. The Role You'll be joining a multidisciplinary AI/ML team responsible for developing the infrastructure and software that powers cutting-edge research and intelligent applications. The role focuses on backend development in Python, integrating AI components with data, compute, and frontend systems to create More ❯

World Class Defence Organisation based in Stevenage is currently looking to recruit an Embedded C/C++ Software Engineer subcontractor on an initial 6 month contract. Hourly Rate: £70.00ph (Umbrella). 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 … Months with very likely extension. Contracts are often ongoing and long-term thereafter. IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview Embedded C/C++ Software Engineer Job Description: The company is a world leader in missile and missile systems looking for a highly capable and adaptable Engineers to join the Development Facility in Stevenage … Hertfordshire. You will be responsible for developing the software through the full lifecycle for safety related real-time systems application software for the next generation of Missile Systems. This is a technical hands-on role working the full software lifecycle. Responsibilities: Responsible for delivering the on-board software for the next generation of Missile Systems. This More ❯

C++ or C Software Engineer Location: Bristol, Full time on site Duration: 12 Months initial SC Clearance Required Rate: £65 ph Umbrella Overview of department: Our team, at our Bristol facility, develop solutions for the next generation of Air Defence Systems developing evolving products whilst maintaining our enviable reputation for safety, performance and dependability. Skillset/Experience required … C++ programming language Knowledge of DDS middleware and Real Time Operating Systems Knowledge of standards such as DefStan 00-55, DO-178C or IEC61508 Desirable A strong background in software engineering, its realisation and system wide impact. Collaborative, open approach to development and have the ability to work well in a team and maintain momentum during development. Experience of … working across the entire software development process from engaging with requirement authorities to automated target integration and proving, supported with effective documentation Experience of new tools, techniques and approaches that might enable us to evolve our processes to improve our efficiency and sustainability Experience in ontologies and Domain specific languages Responsibilities: This is a very hands-on role and More ❯

SOFTWARE ENGINEER - CONTRACT 12 MONTHS - PORTSMOUTH HYBRID 3 DAYS ON SITE 2 DAYS FROM HOME Essential C++ experience Worked in windows applications, preferably with knowledge of MFC and C# Desirable Real time control coding using ADA preferred but not required. ADDITIONAL SECURITY INFORMATION: WE SEEK A SOFTWARE ENGINEER WHO HAS WORKED IN A MILITARY/DEFENCE More ❯

Our esteemed client, a trusted partner of the UK Ministry of Defence, is seeking a highly skilled Software Engineer with expertise in C# and C++. This exciting role involves integrating real products, models, and synthetic environments to provide visualizations, demonstrations, verification and validation, training capabilities, and support. As a Software Engineer, you will join a vital … industry standards. You'll be part of an agile development team of engineers from different disciplines, working together to create simulations and representations of actual equipment. Our approach to software development includes Configuration control Continuous Integration Continuous Delivery or Deployment. Unit testing and test-driven development. What do you need?: Proficient/Expert in C#/C++ Microsoft Visual More ❯

Software Engineer - Robotics Systems Job Experience Contract Details : £500-800 Per Day, 6-month contract, outside IR35, hybrid (2-3 days/week in London). Role Overview: Develop and integrate robotic software systems, focusing on production-level coding and sensor integration in an Agile environment within an exciting start-up. Required Experience - Jira, Python, Docker, ROS2 … C++ Minimum 3 years of production-level software engineering in robotics or related fields. Developed robotic manipulators (kinematics, dynamics, motion planning) using Python (NumPy) and C++ (Eigen). Integrated sensors (RGB, depth, LiDAR) for navigation/localisation on platforms like Clearpath using ROS2 . Worked in Agile (Scrum) teams, managing tasks with Jira , contributing to sprints and retrospectives. Applied More ❯

Ada Software Engineer Duration: Stevenage, full time on site or 4 day compressed Week Rate: up to £53.73 ph PAYE + Holiday pay or £70 ph Umbrella Inside IR35 Duration: 6 Months SC Clearance required Overview of department: Join a growing Software team in Stevenage, working as part of a dynamic team to develop, test and deliver … innovative solutions by exploiting a wide portfolio of software technologies. You will work as part of a small team and be empowered to work individually with little supervision. Responsibilities: Developing Real Time Embedded SW in ADA on a power PC Testing the embedded SW Producing test requirements & test scripts for Unit, Subsystem and System level testing on both host … and target platforms Running tests, analysing results and using target test facilities such as debuggers, probes, logic analysers and oscilloscopes Documenting the Software Key Skillset Proven ability developing in the ADA Programming Language and motivated to develop reliable, high performance, standardised, and documented software Programming embedded Software on a Power PC Testing embedded SW and using test More ❯

Job: Software Engineer Company: BAE Systems Hourly Rate: £33.30 PAYE or £44.81 Umbrella Location : Portsmouth - hybrid 2/4 days pw on-site Contract : 12 months (Opportunity to be extended) Working Hours : 37 hours per week Key Responsibilities : Supporting the maintenance and further development and enhancement of multiple software systems within the Autonomy group. Designing, reviewing, developing … testing, documenting, configuring and delivering software products to the agreed standards and procedures using the specified tools. Testing software products sufficiently to ensure software product quality is maintained and minimal or no re-work is required. Investigating and resolving obsolescence issues and problems raised during any stage of the development lifecycle, including software and system integration … qualification, and in-service trials. Communicating effectively, identifying early potential risks, seeking clarification and providing feedback to the software and integration lead. Skills & Qualifications : Minimum of 3 years C++ experience Minimum of 5 years software development experience Understanding of UML or similarly high level design methodology Understanding of the Linux Operating System will be desirable If you would More ❯

Embedded Software Engineer Location: Stevenage, UK Contract: 6 months Rate: £53.51/hour PAYE (£61.29/hour incl. holiday) or £70/hour Umbrella We seek an engineer with recent high-integrity or safety-critical industry experience (defence, aerospace, or similar), or eligible for UK security clearance. Overview: Hands-on role developing safety-critical embedded software for next-generation missile systems, covering the full software lifecycle from requirements and design to implementation, testing, and verification. Key Responsibilities: Develop, test, and verify embedded real-time software. Produce and maintain specifications, design, and test documentation. Debug complex issues and ensure compliance with safety standards. Work in a lab environment with live hardware and cross-disciplinary teams. … embedded development experience. Knowledge of requirements tools (e.g., DOORS) and configuration management (e.g., Git, RTC). Unit testing experience with LDRA, RAPITA, or similar tools. Familiarity with high-integrity software standards (DO178C Level B, SIL-4). Desirable: Experience with defence standards, microcontrollers, hardware testing, and virtual environments. Familiarity with RAPITA, Ansys SCADE, or ALM tools (JIRA, IBM EWM More ❯

C# Software Engineer Location: Stevenage, UK Contract: 12 months Rate: £49.70/hour PAYE (£56.93/hour incl. holiday) or £65/hour Umbrella We seek an engineer with recent high-integrity or safety-critical industry experience (defence, aerospace, or similar), or eligible for UK security clearance. Overview: Contribute to the development of advanced defence systems across … service support. The role focuses on creating and integrating simulation components, digital twins, and emulators that accurately represent weapon systems within synthetic environments. Responsibilities: Design, develop, and integrate simulation software using C# and C++. Collaborate with project leads and architects to deliver complete system representations. Implement configuration control, continuous integration, and test-driven development practices. Work within an agile More ❯

SOFTWARE ENGINEER - CONTRACT 12 MONTHS - PORTSMOUTH HYBRID 3 DAYS ON SITE 2 DAYS FROM HOME Essential C++ experience Worked in windows applications, preferably with knowledge of MFC and C# Desirable Real time control coding using ADA preferred but not required click apply for full job details More ❯

Contract Role: Senior Software Engineer (x2) Rate: Up to £375/day (Inside IR35) Location: London - 1 day a week onsite Duration: ASAP - 31 March 2026 We're building a brand-new engineering team to modernise and futureproof Media Services products. This is your chance to join a major legacy replacement programme, tackling technical debt and designing cloud … background with Java microservices Expertise in AWS, particularly CDK Hands-on DevOps and CI/CD pipeline knowledge Proven record with component migrations and TDD If you're an engineer who thrives on modernisation, clean architecture, and technical challenges at scale, this gig is for you. More ❯

Job Title: Senior Engineer with Node.js and Python or Back End (Java and ideally Kafka) Max rate: £537/Day on Umbrella Location: Croydon (Hybrid) Clearance required: SC Transfer (Active SC only ) Contract Duration: 05 months Experience of Java Experience of Spring framework or equivalent. Knowledge of software design patterns and when to apply them Excellent knowledge of … Experience of containerisation using Docker or Kubernetes Experience of Continuous Integration (CI) and Continuous Delivery (CD) A passion for delivering quality code, by use of TDD and setting high software quality standard We're also using the following technologies and patterns, it would be great if you had some of the skills, if not we can help develop them More ❯

Senior Software Developer - Ruby 12-Month Contract Inside IR35 Role Details Location: London or Manchester (2 days/week onsite + monthly team rotation) Duration: 12 months Clearance: BPSS to start; active SC required due to timescale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary More ❯

THE COMPANY This organisation is pushing the boundaries of AI and data-driven software, developing next-generation tools that integrate advanced machine learning with scalable backend systems. They're looking for an experienced Python Backend Engineer to support the build and integration of key AI components across their tech stack. THE ROLE As a Contract Python Backend Engineer More ❯