24 senior software engineer jobs found

Location: London 1-2 days a week. Department: Engineering Employment Type: Contract Contract Length: 6 months (with potential for extension) About YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done. About the role: As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious, passionate, driven, and...

Full job description Location: London 1-2 days a week. Department: Engineering Employment Type: Contract Contract Length: 6 months (with potential for extension) About YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done. About the role: As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious,...

Location: London 1-2 days a week. Department: Engineering Employment Type: Contract Contract Length: 6 months (with potential for extension) About YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done. About the role: As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious, passionate, driven, and...

Role: Senior Applied AI Engineer (Private Sector Contractor) Rate: £700–£900 per day, dependent on experience Location: Hybrid: 2 days a week on site at Harwell, Oxfordshire; remainder remote (UK-based) Engagement: Contract, outside IR35: initial [6]-month term with strong likelihood of extension Start: Immediate Start   A note from the Founders   Oxford Dynamics is at an inflection point. We build frontier AI for environments where the cost of a wrong decision is high: defence and national security, critical infrastructure, and commercial organisations making high-stakes decisions on complex data. We are growing fast, and the constraint on how fast is no longer ideas or opportunity. It is whether the systems we ship are good enough for the people who stake decisions on them. That is where you come in. We need engineers who can build the systems this mission depends on, and build them to a standard that holds...

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...

About the Role We are seeking a Senior Test Engineer to join a newly formed team within a large scale DWP programme. The role will focus on ensuring the quality, security and performance of services supporting identity, authentication, authorisation and access management, while driving test automation and quality engineering practices across Agile delivery teams.   As a Senior Test Engineer  your main responsibilities will be to: Test Strategy & Planning: Define and implement a comprehensive testing strategy for microservices or APIs Automation: Develop and maintain automated test scripts using Cucumber for integration with continuous integration/continuous deployment (CI/CD) pipelines. Collaboration: Work closely with developers, QA engineers, and product managers in an Agile environment to identify issues. Security & Identity Testing: Define and execute testing activities for authentication, authorisation and identity management...

Waracle is looking for a  Senior QA Engineer  to join our world-class digital technology consultancy. We are home to a diverse, smart, curious, and ambitious community of specialists in technology-driven transformation. We partner with ambitious clients to help them solve their biggest business and customer challenges. Together, we innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design, and delivery to operations. This role is available on  Contract (Inside IR35)  bases, initially for 6 months. If you love collaborating with multi-disciplinary teams and designing smart automation strategies we would love to hear from you! We champion modern, balanced working and offer a  hybrid setup , asking you to collaborate in person  2 days a week  from either our  Glasgow, Edinburgh or Dundee...

Waracle is looking for a  Senior QA Engineer  to join our world-class digital technology consultancy. We are home to a diverse, smart, curious, and ambitious community of specialists in technology-driven transformation. We partner with ambitious clients to help them solve their biggest business and customer challenges. Together, we innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design, and delivery to operations. This role is available on  Contract (Inside IR35)  bases, initially for 6 months. If you love collaborating with multi-disciplinary teams and designing smart automation strategies we would love to hear from you! We champion modern, balanced working and offer a  hybrid setup , asking you to collaborate in person  2 days a week  from either our  Glasgow, Edinburgh or Dundee...

Waracle is looking for a  Senior QA Engineer  to join our world-class digital technology consultancy. We are home to a diverse, smart, curious, and ambitious community of specialists in technology-driven transformation. We partner with ambitious clients to help them solve their biggest business and customer challenges. Together, we innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design, and delivery to operations. This role is available on  Contract (Inside IR35)  bases, initially for 6 months. If you love collaborating with multi-disciplinary teams and designing smart automation strategies we would love to hear from you! We champion modern, balanced working and offer a  hybrid setup , asking you to collaborate in person  2 days a week  from either our  Glasgow, Edinburgh or Dundee...

Contract - Cyber Security Engineer (Threat Modelling) Basic information Location London Business Line Technology & Transformation Job Type Contract Date published 10-Sep-2026 Req # 25099 Job description Job Title: Senior Threat Modeler (contract) Location: London Hybrid, 2-3 days a week in the London office Duration: 4 months Contract Start Date: ASAP Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with...

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...

Role: Senior Applied AI Engineer (Private Sector Contractor) Rate: £700–£900 per day, dependent on experience Location: Hybrid: 2 days a week on site at Harwell, Oxfordshire; remainder remote (UK-based) Engagement: Contract, outside IR35: initial [6]-month term with strong likelihood of extension Start: Immediate Start   A note from the Founders   Oxford Dynamics is at an inflection point. We build frontier AI for environments where the cost of a wrong decision is high: defence and national security, critical infrastructure, and commercial organisations making high-stakes decisions on complex data. We are growing fast, and the constraint on how fast is no longer ideas or opportunity. It is whether the systems we ship are good enough for the people who stake decisions on them. That is where you come in. We need engineers who can build the systems this mission depends on, and build them to a standard that holds...

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...

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...

3-6 month contract | Reading / Hybrid   We're looking for a smart, energetic and hands-on person to join us as we launch and test a brand new AI product, BuildEngine.   BuildEngine is designed to help engineering teams use AI to build software faster, while giving businesses the governance, security and control they need.   This isn't a narrow role. You'll get involved across the whole product.   You could be: Testing new features and finding bugs Helping shape how the product works Working with our engineers on smaller technical tasks Testing AI agents and development workflows Helping prepare customer demos Joining customer calls and showing BuildEngine in action Gathering feedback and helping turn it into product improvements Travelling to tradeshows Trying new AI models, tools and ideas   We're not looking for someone with 10 years of experience.   We're looking for someone...

  Job Title: Full Stack Developer (contract) Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires a...

Description Key Details... Job Type: Contract (6 months) Location: London or Cirencester Working Style: Hybrid (2-3 days onsite a week) Day rate: £600-750 Why this role exists… We're working with a leading wealth management client to strengthen how non-functional quality is embedded across their technology estate Rather than treating performance, resilience, security, and operational readiness as activities that happen towards the end of delivery, we're building a proactive, shift-left approach where these considerations are built into solutions from the start. We are looking for a Test Architect who will sit within the central technology teams and be responsible for defining and implementing the enterprise-wide Performance Engineering and Non-Functional Testing strategy. What you'll be doing... You'll play a central role in shaping how non-functional quality is approached across an entire organisation, helping teams deliver...

Description Key Details... Job Type: Contract (6 months) Location: London or Cirencester Working Style: Hybrid (2-3 days onsite a week) Day rate: £600-750 Why this role exists… We're working with a leading wealth management client to strengthen how non-functional quality is embedded across their technology estate Rather than treating performance, resilience, security, and operational readiness as activities that happen towards the end of delivery, we're building a proactive, shift-left approach where these considerations are built into solutions from the start. We are looking for a Test Architect who will sit within the central technology teams and be responsible for defining and implementing the enterprise-wide Performance Engineering and Non-Functional Testing strategy. What you'll be doing... You'll play a central role in shaping how non-functional quality is approached across an entire organisation, helping teams deliver...

Description Key Details... Job Type: Contract (6 months) Location: London or Cirencester Working Style: Hybrid (2-3 days onsite a week) Day rate: £600-750 Why this role exists… We're working with a leading wealth management client to strengthen how non-functional quality is embedded across their technology estate Rather than treating performance, resilience, security, and operational readiness as activities that happen towards the end of delivery, we're building a proactive, shift-left approach where these considerations are built into solutions from the start. We are looking for a Test Architect who will sit within the central technology teams and be responsible for defining and implementing the enterprise-wide Performance Engineering and Non-Functional Testing strategy. What you'll be doing... You'll play a central role in shaping how non-functional quality is approached across an entire organisation, helping teams deliver...

Description Key Details... Job Type: Contract (6 months) Location: London or Cirencester Working Style: Hybrid (2-3 days onsite a week) Day rate: £600-750 Why this role exists… We're working with a leading wealth management client to strengthen how non-functional quality is embedded across their technology estate Rather than treating performance, resilience, security, and operational readiness as activities that happen towards the end of delivery, we're building a proactive, shift-left approach where these considerations are built into solutions from the start. We are looking for a Test Architect who will sit within the central technology teams and be responsible for defining and implementing the enterprise-wide Performance Engineering and Non-Functional Testing strategy. What you'll be doing... You'll play a central role in shaping how non-functional quality is approached across an entire organisation, helping teams deliver...