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10 senior software engineer jobs found

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senior software engineer Hybrid
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6 Months or more  (6) Duration not stated  (3) up to 6 Months  (1)
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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
May 14, 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 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...
Contract Spy
May 20, 2026
6 Months or more
Lead Software Engineer at Department for Work & Pensions, UK Office/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (United Kingdom)
The Department for Work and Pensions (DWP) is responsible for welfare, pensions, and child maintenance policy. As the UK's biggest public service department, it administers the State Pension and a range of working age, disability and ill health benefits to around 20 million claimants and customers. As such, we operate on a scale that is almost unmatched anywhere in Europe and most people in Britain come into contact with us at some point in their lives.   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...
Contract Spy
May 20, 2026
6 Months or more
Scientific Software Engineer at Met Office, Exeter/Remote, 6 Months, £Contract Rate
Contract Spy Hybrid (Exeter, UK)
In this role you will provide technical leadership in the re-design, development and translation, maintenance, and support of existing specialised scientific software applications into an updated code base to enable easier scientific changes and maintenance of existing capabilities.   As a Scientific Software Engineer your main responsibilities will be to:   Proficiently provide deep and/or broad scientific and technical insight into the re-coding of legacy scientific software into supportable code. Engage with internal and/or external users alongside the Project and Product roles in the team to understand the requirements for your work and significantly contribute to the development and evaluation of plans to meet these requirements. Apply, promote, and support good Quality Assurance processes, best practice and standards in both your and others' work to ensure agreed standards are maintained and support collaborative team ways of working....
Contract Spy
May 19, 2026
6 Months or more
Test Engineer at Department for Work & Pensions, Newcastle/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (Newcastle, UK)
Core Purpose  Join DWP's Digital Payment Services team on a major, multi-year transformation programme modernising one of the UK's largest and most critical payment platforms. As the UK's biggest payer, supporting over 22 million citizens and processing approximately £230 billion in payments annually, this programme is re-platforming core systems to improve resilience, scalability and future innovation across government services.   As part of an Agile delivery team, you will support the delivery of applications across AME Payments, contributing to the reliability and performance of critical citizen-facing services.   As a Test Engineer , your main responsibilities will be to: Test applications that underpin critical citizen services, ensuring usability, accessibility, security, stability and performance. Build and maintain robust automated test frameworks and test suites. Identify, log and support resolution of defects impacting...
Contract Spy
May 19, 2026
6 Months or more
Test Engineer at Department for Work & Pensions, Manchester/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (Manchester, UK)
Core Purpose  Join DWP's Digital Payment Services team on a major, multi-year transformation programme modernising one of the UK's largest and most critical payment platforms. As the UK's biggest payer, supporting over 22 million citizens and processing approximately £230 billion in payments annually, this programme is re-platforming core systems to improve resilience, scalability and future innovation across government services.   As part of an Agile delivery team, you will support the delivery of applications across AME Payments, contributing to the reliability and performance of critical citizen-facing services.   As a Test Engineer , your main responsibilities will be to: Test applications that underpin critical citizen services, ensuring usability, accessibility, security, stability and performance. Build and maintain robust automated test frameworks and test suites. Identify, log and support resolution of defects impacting...
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