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3 senior software engineer jobs found in London

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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 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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