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Contractor 139
software engineer

139 software engineer jobs found

CL
Jul 12, 2026  
Software Engineer
I'm working with a key client on a high-impact contract role within a fast-paced engineering team building scalable, cloud-native applications. This isn't just another full stack role - they're looking for a hands-on engineer who can build, deploy, and own production systems end-to-end. 📍 The basics 12-month contract (strong extension potential) London - hybrid working £500/day 💡 What you'll actually be doing Building full stack applications using Java (Spring Boot) + Angular 17+ Developing microservices, REST APIs, and GraphQL services Working within a cloud-native Azure environment Implementing NgRx for state management on the frontend Setting up and improving CI/CD pipelines (GitHub Actions) Collaborating closely with product, QA, and SRE teams ✅ What they're looking for Strong Java (Spring Boot, ideally Java 17) Modern Angular (16/17+) with NgRx experience Solid hands-on Azure experience (App Services, Functions, DevOps) Experience building and deploying...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
Jul 12, 2026  
Senior Software Engineer
Senior Software Engineer - (phone number removed) - £57.20/hr Are you ready to elevate your career as a Senior Software Engineer? This exciting opportunity offers the chance to work on cutting-edge projects in a dynamic and collaborative environment. With a focus on innovation and operational excellence, this company is looking for talented individuals like you to make a real impact. Take the next step in your career and be part of a team that values quality, performance, and professional growth. What You Will Do: - Collaborate as a Senior Software Engineer within a high-performing squad to deliver high-quality software deployments. - Optimise communication and integration between development, quality assurance, and IT operations teams. - Develop and implement infrastructure solutions that leverage the latest technology best practices. - Enhance operational performance through innovative problem-solving and process improvements. - Lead and mentor junior team members,...
IR35 Status:
Unknown Status

CV-Library Manchester, UK Contractor
CL
Jul 12, 2026  
Senior Software Engineer
Duties: Responsible for working as a senior software engineer with a squad to ensure quality software deployments and overall application health and performance. Optimizes relationships between the development, quality assurance and IT operations teams. Promotes communication, integration, and collaboration for enhanced software development productivity. Develops infrastructure to incorporate latest technology best practices and improve operational performance. Requires broad technical knowledge and experience across a variety of IT areas, including infrastructure, development, operations, and quality assurance. Level: A Specialist Professional (P4) is a recognized subject matter expert in job area typically obtained through advanced education and work experience. Responsibilities typically include: Managing large projects or processes with limited oversight from manager. Coaching, reviewing and delegating work to lower level professionals. Problems faced are difficult and...
IR35 Status:
Outside IR35

CV-Library Manchester, Greater Manchester Contractor
CL
Jul 10, 2026  
Hardware & Embedded Software Engineer
Location: London (Hybrid) Rate: £50-55 per hour + VAT IR35 Status: Outside IR35 About the Opportunity We're supporting an innovative technology business developing cutting-edge wearable products that combine hardware, embedded systems, AI, and data analytics to deliver real-time performance coaching. The business has grown from an early-stage concept into a globally recognised technology platform, leveraging large-scale real-world data and intelligent sensing to create industry-leading products. We're seeking a Hardware & Embedded Software Engineer to help develop the next generation of wearable technology. The Role This is a highly varied engineering position sitting at the intersection of hardware, embedded software, sensors, and product development. You'll work closely with product, AI, mobile, and data teams to develop wearable electronics that deliver accurate real-time performance feedback in demanding environments. This role is ideal for an engineer who enjoys...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jul 09, 2026  
Software Engineer
Role: Software Location: Cheltenham Duration: 12 months Rate: £75/hour Inside IR35: Umbrella Role Summary As a Software Engineer in the Displays Application team you will be responsible for the design and development of real-time embedded software within an integrated team environment, developing Aircraft Standby Display Systems. You will demonstrate independence & sound technical judgement to execute on assignments, identifying problems and formulating solutions. Essential Responsibilities Execute the requirements, design, implementation and verification of assigned software projects using sound engineering principles and adhering to business standards, practices, procedures and product / program requirements Document technical data generated by the assigned project consistent with engineering policies and procedures Provide timely communications on significant issues or developments Assure proper documentation of technical data is generated for the assigned projects...
IR35 Status:
Inside IR35

CV-Library Cheltenham, Gloucestershire Contractor
CL
Jul 08, 2026  
C / C++ Software Engineer
World Class Defence Organisation based in Stevenage is currently looking to recruit 2x Software Engineer subcontractors on an initial 12 month contract, with very likely extension.  The role will be onsite 4 days per week.  A 4 day working week is OK (Monday to Thursday).   Rate: £65.00 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 onsite 4 days per week. A 4 day working week is OK (Monday to Thursday).  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: Our ever-evolving team powers the business across Europe and brings the next generation of defence solutions to life. Together we experiment, innovate and create across the full product lifecycle. And, in a collaborative and close-knit culture, we support...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
Jul 08, 2026  
Embedded Software Engineer
World Class Defence Organisation based in Stevenage and Bolton is currently looking to recruit 2x Embedded Software Engineer subcontractors on an initial 12 month contract, with very likely extension.  The role will be onsite 4 days per week.  A 4 day working week is OK (Monday to Thursday).   Rate: £65.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage or Bolton (depending on your preference) Hybrid / Remote working: The role will be onsite 4 days per week. A 4 day working week is OK (Monday to Thursday).  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: We supply a full range of hard real time software solutions for the next generation of missile and defence solutions. This unique and exciting opportunity will allow you to develop technical...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
Jul 08, 2026  
Embedded Software Engineer
World Class Defence Organisation based in Stevenage and Bolton is currently looking to recruit 2x Embedded Software Engineer subcontractors on an initial 12 month contract, with very likely extension.  The role will be onsite 4 days per week.  A 4 day working week is OK (Monday to Thursday).   Rate: £65.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage or Bolton (depending on your preference) Hybrid / Remote working: The role will be onsite 4 days per week. A 4 day working week is OK (Monday to Thursday).  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: We supply a full range of hard real time software solutions for the next generation of missile and defence solutions. This unique and exciting opportunity will allow you to develop technical...
IR35 Status:
Inside IR35

CV-Library Bolton, UK Contractor
CL
Jul 07, 2026  
Embedded Software Engineer - 3490-1
Our client, a leading player in the Defence & Security and Aerospace sectors, is seeking an Embedded Software Engineer to join their Embedded Software team on an initial 6-month contract. Based onsite in Stevenage, this role provides a unique opportunity to develop both technical and leadership skills across a variety of cutting-edge missile and defence solutions. Key Responsibilities: Developing embedded, real-time software components Continuing the development and integration of missile subsystem software products Targeting software development in C, C++, and/or Ada languages Integrating software with other software components, firmware, and hardware Solving technical problems that sometimes extend beyond the typical software boundaries Ensuring the software complies with relevant standards and practices Job Requirements: Experience in the development of embedded software using C, C++ (Ada experience beneficial) Understanding of Real-Time Operating Systems Excellent...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 06, 2026  
Software Engineer C C
Software Engineer JOB LOCATION: Stevenage SECURITY CLEARANCE LEVEL: SC to Start DURATION: 12+ Months (Extension Possible) WORK PATTERN: Full Time ONSITE (Compressed Option Available) RATE: £ 65.00 Per hr on Umbrella (Inside IR35) Essential Skillset & Tools * Previous software engineering experience in the development of test solutions * Strong ability to write software in C / C++; scripting languages would be an advantage to our future direction. * Previous experience working in an agile development team. * A good understanding of automation, continuous integration * Knowledge of electronics measurement and debug techniques using equipment such as oscilloscopes and spectrum analysers Overview: * Technology matters more at MBDA. Our ever-evolving team powers the business across Europe and brings the next generation of defence solutions to life. Together we experiment, innovate and create across the full product lifecycle. And, in a collaborative and...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 06, 2026  
Software Engineer C, C++ / ADA
Software Engineer JOB LOCATION: Stevenage & Bolton SECURITY CLEARANCE LEVEL: SC to Start DURATION: 6+ Months (Extension Possible) WORK PATTERN: Full Time ONSITE (Compressed Option Available) RATE: £ 70.00 Per hr on Umbrella (Inside IR35) TARGET INDUSTRIES AND COMPANIES. Is Defence a must? If not what industries can be considered Open to all industries where skillset is apparent; Def/Aero would be ideal however. Essential Skillset & Tools * C/C++ EXPERIENCE (ADA WOULD BE A DESIRABLE ON TOP OF THIS, BUT NOT ESSENTIAL) * An awareness of developing and deploying software on real-time Operating Systems, Risc-V and ARM-based processing platforms. * Excellent analytical and design ability, including review and critical analysis. * Knowledge of modern software development practices Overview: * The growing workload within MBDA UK has created an exciting opportunity within the Embedded Software team . * We supply a full range of hard real time software...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 06, 2026  
Software Engineer RTOS
Software Engineer required for long term contract based on site in Stevenage (Bolton could also be considered) Skillset/experience required: Experience in the development of embedded software with C, C++ (Ada experience could also be beneficial, but not essential). It would be desirable for you to have knowledge of Real Time Operating Systems. Can do' and flexible approach - you'll enjoy solving technical problems that sometimes extend beyond the bounds of "software" Excellent analytical and design ability, including review and critical analysis The ability to communicate effectively with multiple stakeholders. An awareness of developing and deploying software on real-time Operating Systems, Risc-V and ARM-based processing platforms. Knowledge of modern software development practices. It would be advantageous to have a knowledge of standards such as DefStan 00-55 & DO178B/C and restricted coding standards such as MISRA / SPARK. Responsibilities: You will be developing...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 05, 2026  
Software Engineer (Test Equip)
Software Engineer required for long term contract assignment based in Stevenage You will be responsible for designing and developing Test equipment software to test the world leading and Complex missile systems and sub-components. Skillset/experience required: Previous software engineering experience in the development of test solutions Strong ability to write software in C / C++; scripting languages would be an advantage to our future direction. Previous experience working in an agile development team. A strong understanding of what is required to create high quality software and the ability to support quality practices A good understanding of automation, continuous integration and DevOps principles and practices Knowledge of electronics measurement and debug techniques using equipment such as oscilloscopes and spectrum analysersResponsibilities: Designing and developing Test Equipment software to test world leading complex missile systems and sub-components; Working with a...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 05, 2026  
Lead Software Engineer / Senior Software Engineer
Lead Software Engineer / Senior Software Engineer (Python & Django) Contract Length: 12 Months Rate: Up to £750 per day (Umbrella) IR35 Status: Inside IR35 Clearance Required: Active SC Clearance Working Pattern: Hybrid – 2 days per week onsite Locations London Manchester Birmingham Cardiff Darlington The Opportunity We are seeking an experienced Lead Software Engineer / Senior Software Engineer with strong Python and Django expertise to join a major digital transformation programme operating within a secure and highly regulated environment. This is an exciting opportunity to contribute to the design, development, and delivery of secure, scalable digital services supporting business-critical systems. Working within a modern agile delivery environment, you will play a key role in shaping technical solutions, leading engineering activities, and collaborating across multidisciplinary teams. The successful candidate will be a hands-on technical leader with a passion...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
Jul 05, 2026  
Software Engineer C
We're working with a leading engineering and technology organisation within the defence sector, currently looking for a Senior Software Engineer to join a highly skilled team developing advanced test software for complex systems. This is a fantastic opportunity to work on cutting-edge technology in an environment that combines software engineering, automation, electronics and innovation. The Role You'll be responsible for designing and developing software used within advanced test equipment systems, supporting products from early concept through to production. Working closely with multidisciplinary engineering teams, you'll help deliver high-quality software solutions while contributing to continuous improvement, automation and modern development practices. Key Responsibilities Design and develop software for advanced test and measurement systems Develop robust applications primarily using C/C++ Work collaboratively across software, systems and electronics teams Support Agile...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jun 26, 2026  
Contract C# Software Engineer
Contract C# Software Engineer Near Wimbledon 6-month contract Software Engineer role developing C# Windows applications that interface with hardware. This role is inside IR35 and requires on-site work 3 days per week (full time for the first few weeks). C# Software Engineer skills required - * Good analytical skills and experience of code and design review for large projects. * Experience of multi-threaded and distributed applications, preferably with an understanding network of protocols. * Strong Experience in developing Windows desktop applications in C# * Interfacing with hardware/physical products * .NET environment, Windows Forms, TCP/IP & UDP protocols Please apply or call for more information
IR35 Status:
Inside IR35

CV-Library KT3, Malden, Greater London Contractor
CL
Jun 21, 2026  
Embedded Software Engineer | 6-Month Contract (Outside IR35) | Cambridge
Embedded Software Engineer | 6-Month Contract (Outside IR35) | CambridgeLocation: Cambridge, UK (Onsite) Contract Type: 6 months (Outside IR35) Rate: Competitive (DOE) Responsibilities: Develop embedded software in C (Linux environment) Design, implement, and maintain device drivers Work closely with hardware and systems engineers onsiteRequired Experience: 3+ years’ embedded software development experience Strong C programming skills in Linux environments Experience with device drivers or kernel-adjacent developmentApply: If you're looking for a 6-month Outside IR35 contract in Cambridge, apply with your CV today
IR35 Status:
Outside IR35

CV-Library Cambridge, UK Contractor
CL
Jun 09, 2026  
Embedded Software Engineer
I'm recruiting for a small business in Cheltenham who are looking for an Embedded Software Contractor on a 6 month contract (outside IR35). The work is based around Zephyr RTOS on Nordic chips. Previous experience on Zephyr would be hugely beneficial for this. ** Work can be done remotely after an initial period of 3-4 days on-site. Also may require on-site visits to Cheltenham throughout depending on project progression. ** ROLE: Embedded Software Engineer LOCATION: Remote (Cheltenham) RATE: up to £60ph DURATION: 6 months Skills required for the Embedded SW Engineer: * C / C++ * Zephyr RTOS / CMake (massively beneficial) * Nordic chips * Linux * GitHub If you're interested, please apply below or get in touch with any questions Cheers, Nathan
IR35 Status:
Outside IR35

CV-Library GL50, Montpellier, Gloucestershire Contractor
CL
Jul 07, 2026  
Software Test Engineer
Our client, a leader in the defence and security sector, is currently seeking a Software Test Engineer for a contract position in Stevenage. This role is integral in designing and developing test equipment software for cutting-edge missile systems and sub-components. Our client's dynamic and innovative team across Europe drives advancements in defence technology. Key Responsibilities: Designing and developing test equipment software for complex missile systems and sub-components Collaborating with various teams and stakeholders across the organisation to deliver test software capabilities from early concepts to production Experimenting with new technologies and implementations to meet evolving customer requirements Implementing changes to improve software development practices both within the test software domain and the broader software community Embracing agile methodologies to deliver value and achieve a real sense of accomplishment Engaging with test equipment and electronic...
IR35 Status:
Unknown Status

CV-Library Stevenage, Hertfordshire Contractor
CL
Jul 10, 2026  
Software Test Engineer / Lead – Outside IR35
Software Test Engineer / Lead – Outside IR35 My client is the fastest growing technology company who is seeking a Software Test Engineer / Lead for an initial 12-month contract. As a Software Test Engineer / Lead you should have experience with both Manual and Automated Testing, Regression Testing or Performance Testing. As a team player you will be liaising with other multi-functional testers and software designer / developers to understand the business requirements and product functionality, You will be involved in software test spec, manual test cases, automated test scripts and performance testing solutions that will need to be implemented throughout the delivery pipeline. Involvement in production and maintenance of system testing and systems integration of hardware and software components through to resolution of all faults found in the software. You will ideally be degree educated in an engineering or science subject, with a good IT content and ISTQB® certification is...
IR35 Status:
Outside IR35

CV-Library United Kingdom Contractor
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