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5 senior software engineer jobs found

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senior software engineer £400 - £500
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Contract Spy
Sep 18, 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
Sep 11, 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
Sep 04, 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
Sep 16, 2026
Duration not stated
Test Engineer (SFIA Level 4) - SC Cleared at Layer7, Remote/Manchester, £420 per day
£420 per day
Contract Spy Remote (Manchester, UK)
Rate: £420.00 per day Inside IR35 Location: Hybrid with occasional onsite attendance in Newcastle or Manchester Security Clearance: Active SC Clearance required Role Overview We are seeking an experienced Test Engineer (SFIA Level 4) to support the delivery of high-quality digital services within a Public Sector/Government environment. The successful candidate will contribute to the design, development and execution of automated testing solutions, ensuring robust quality assurance throughout the software development lifecycle. This role is suited to a hands-on test professional with strong automation experience and a passion for quality engineering and continuous improvement. Key Responsibilities Design, develop and maintain automated test frameworks and test suites. Create and execute functional, integration, regression and end-to-end automated tests. Work collaboratively within Agile delivery teams alongside Developers, Business...
Contract Spy
Sep 16, 2026
Duration not stated
Software Engineer (Full Stack) SFIA Level 4 - SC Cleared at Layer7, Remote/Newcastle-Upon-Tyne, £470 per day
£470 per day
Contract Spy Remote (Newcastle-Upon-Tyne, UK)
Rate: £470 per day Inside IR35 Location: Hybrid with occasional onsite attendance in Newcastle or Manchester Clearance: Active SC Clearance or eligibility to obtain SC Clearance required Contract Type: Contract Overview We are seeking an experienced SFIA Level 4 Software Engineer to join a high-profile public sector delivery programme. The successful candidate will be a strong full-stack engineer with extensive experience across Java-based Back End technologies and modern web development frameworks. You will work within agile, multidisciplinary teams to design, develop, test, and deliver scalable digital services supporting critical government and public sector initiatives. Key Responsibilities Design, develop and maintain high-quality software solutions across the full technology stack. Build and enhance Back End services using Java and Spring-based technologies. Develop and maintain RESTful APIs and microservices architectures....
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