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9 senior software engineer jobs found

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Hybrid senior software engineer
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Contract Spy
Jun 10, 2026
6 Months or more
Lead Full Stack Engineer - SC Cleared at Department for Business and Trade, UK Office/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (UK)
SC Clearance is an essential requirement for this role, as a minimum you must be willing & eligible to undergo checks. Please note, due to the exceptional requirements of this position (short-term nature of this role and speed at which we require a postholder in situ) preference may be given to candidates who meet all of the essential criteria and hold active SC clearance.    A Senior Engineer responsible for designing, building, running, and continuously improving software that meets user needs. You will write clean, secure, and test-driven code, ensuring solutions are open by default and easily reusable by others. The role involves delivering integrated software solutions as part of a complete service, with accountability for both development and live service operation. You will plan and lead development across related workstreams, maintaining a clear understanding of the wider system architecture, while collaborating with multidisciplinary teams to...
Contract Spy
Jun 05, 2026
Duration not stated
Senior Solidity Engineer at Test Yantra, London/Remote, £400 per day
£400 per day
Contract Spy Hybrid (London, UK)
Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...
Contract Spy
May 29, 2026
Duration not stated
Senior Solidity Engineer at Test Yantra, London/Remote, £400 per day
£400 per day
Contract Spy Hybrid (London, UK)
Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...
Contract Spy
Jun 11, 2026
6 Months or more
Senior Full Stack Developer - Active SC at Ministry of Justice, UK Offices/Hybrid, 12 Months, £Contract Rate
Contract Spy Hybrid (United Kingdom)
HM Courts & Tribunals Service is responsible for the administration of criminal, civil and family Courts and Tribunals in England & Wales. Their roles support service users and colleagues within HMCTS, where people and businesses access potentially life-changing justice. We're looking for individuals who are committed to public service and making a difference in people's lives to deliver justice.   As a Senior Software Developer at HMCTS you will work with a wide range of stakeholders such as user researchers, product managers, designers, business analysts, delivery managers and digital architects, all of whom share a vision for making better government through smarter use of technology. You will innovate to radically transform public services for the better.   As a Senior Full Stack Developer your main responsibilities will be to:   Develop, improve and document code, following best practices and internal standards. Continuously...
Contract Spy
Jun 11, 2026
6 Months or more
Full Stack Node.js Developer at Department for Work & Pensions, Newcastle/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (Newcastle, UK)
Working with DWP, you will be helping us to drive our priorities to: Help people to move into work and support those already in work to progress, with the aim of increasing overall workforce participation Help people to plan and save for later life, while providing a safety net for those who need it now Provide effective, efficient, and innovative services to the millions of claimants who rely on us every day, including the most vulnerable in society Improve experience of our services while maximising value for money for the taxpayer.   As a Full Stack Node. js developer you will develop and maintain software products that make up citizen services and contribute towards their design. You will be responsible for the operational stability of the products you build and be in a position to affect change in the on-going robustness and resilience of those products. You will work within, and contribute to, the overall Software Development Lifecycle...
Contract Spy
Jun 11, 2026
6 Months or more
Full Stack Node.js Developer at Department for Work & Pensions, Blackpool/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (Blackpool, UK)
Working with DWP, you will be helping us to drive our priorities to: Help people to move into work and support those already in work to progress, with the aim of increasing overall workforce participation Help people to plan and save for later life, while providing a safety net for those who need it now Provide effective, efficient, and innovative services to the millions of claimants who rely on us every day, including the most vulnerable in society Improve experience of our services while maximising value for money for the taxpayer.   As a Full Stack Node. js developer you will develop and maintain software products that make up citizen services and contribute towards their design. You will be responsible for the operational stability of the products you build and be in a position to affect change in the on-going robustness and resilience of those products. You will work within, and contribute to, the overall Software Development Lifecycle...
Contract Spy
Jun 11, 2026
6 Months or more
Full Stack Node.js Developer at Department for Work & Pensions, Manchester/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (Manchester, UK)
Working with DWP, you will be helping us to drive our priorities to: Help people to move into work and support those already in work to progress, with the aim of increasing overall workforce participation Help people to plan and save for later life, while providing a safety net for those who need it now Provide effective, efficient, and innovative services to the millions of claimants who rely on us every day, including the most vulnerable in society Improve experience of our services while maximising value for money for the taxpayer.   As a Full Stack Node. js developer you will develop and maintain software products that make up citizen services and contribute towards their design. You will be responsible for the operational stability of the products you build and be in a position to affect change in the on-going robustness and resilience of those products. You will work within, and contribute to, the overall Software Development Lifecycle...
Contract Spy
Jun 04, 2026
6 Months or more
Test Engineer at Nuclear Decommissioning Authority, Warrington/Remote, 9 Months, £Contract Rate
Contract Spy Hybrid (Warrington, UK)
The Nuclear Decommissioning Authority (NDA) is a non-departmental public body created through the Energy Act 2004 .   We have 5 offices across the UK, in Cumbria, Dounreay, Harwell, Warrington and London. We have 17 sites including the first fleet of nuclear power stations, research centres, fuel-related facilities, and Sellafield, which has the largest radioactive inventory and the most complex facilities to decommission.   We are sponsored by the Department for Energy Security and Net Zero (DESNZ) and supported by Dounreay, Magnox, Nuclear Waste Services, Nuclear Transport Solutions and Sellafield. The Scottish government also has a governance role, working closely with DESNZ to ensure its expectations are met.   Our role is strategic - we establish the overall approach, allocate budgets, set targets and monitor progress.   We do not have a hands-on role in cleaning up our facilities. Instead, we deliver our mission through others,...
Contract Spy
May 27, 2026
up to 6 Months
Software Developer in Test - SC Cleared at TEN10 SOLUTIONS LIMITED, London/Remote, 3 Months initial, £Contract Rate
Contract Spy Hybrid (Southwark, London SE1 3SS, UK)
Contract Opportunity: Security Cleared Software Developer in Test Job Type: Contract -3 month initial - Inside IR35 Location: Hybrid - London Start Date: ASAP Are you an experienced Security Cleared Software Developer in Test looking for your next contract opportunity? We’re seeking a highly capable SDET to support a major public sector programme, helping deliver secure, high-quality software solutions within a complex Agile environment. This is an exciting opportunity to work on large-scale digital transformation initiatives, contributing to the design and implementation of robust automated testing frameworks using Java and Selenium . ?? Important: Candidates must hold active Security Clearance Existing NPPV3 clearance would be highly advantageous. The Role As a Security Cleared Software Developer in Test , you will play a key role in ensuring software quality across critical public sector systems and services. Working closely...
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