21 senior software engineer jobs found

Contract Software Engineer (Golang) UK (Remote)   Location:  Remote (EU-based, GMT timezone) Department:  Engineering Employment Type:  Contract (B2B) 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...

pubGENIUS is a React.js and Next.js development agency and ad-tech startup. We build websites and apps for clients across the US and Europe, specializing in decentralized finance (DeFi, crypto, NFT, blockchain), fintech, and healthcare, with occasional work in e-commerce and other verticals. Beyond client work, we operate our own high-revenue web product with a website, mobile app, and machine learning systems powering our ad-tech optimization engine. Performance is not a preference here, it is a core requirement.   We are looking for a Principal Software Engineer, who will be the technical authority, responsible for all development, architecture decisions, and long-term technical strategy across a website, mobile app, and ML-powered ad-tech optimization systems. This is a full-time independent contractor engagement. You will work hands-on at a senior level where site speed and server performance are core success metrics. You will work directly with...

Location: Remote / Hybrid Employment Type: Contractor  About ifndautoparts  ifndautoparts (I Find Auto Parts) is a rapidly growing online marketplace dedicated exclusively to automotive parts. Our mission is to make finding and selling automotive parts easier, quicker, and smarter by connecting buyers and sellers through innovative technology. As a start-up, ifndautoparts is a family-owned and founder-led company. We operate with a lean, highly collaborative structure and work closely with specialist contractors and development partners to deliver projects and scale the platform. As we expand our business seller network, we are looking for an experienced Senior Integration Engineer to help businesses connect their inventory systems directly to the ifndautoparts marketplace. This is a highly technical, hands-on role focused on helping business sellers connect and synchronise their inventory with the ifndautoparts marketplace. You will work...

Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...

pubGENIUS is a React.js and Next.js development agency and ad-tech startup. We build websites and apps for clients across the US and Europe, specializing in decentralized finance (DeFi, crypto, NFT, blockchain), fintech, and healthcare, with occasional work in e-commerce and other verticals. Beyond client work, we operate our own high-revenue web product with a website, mobile app, and machine learning systems powering our ad-tech optimization engine. Performance is not a preference here, it is a core requirement.   We are looking for a Principal Software Engineer, who will be the technical authority, responsible for all development, architecture decisions, and long-term technical strategy across a website, mobile app, and ML-powered ad-tech optimization systems. This is a full-time independent contractor engagement. You will work hands-on at a senior level where site speed and server performance are core success metrics. You will work directly with...

Learnfinity Ltd (UKPRN 10097136) is a UK edtech delivering 8-week bootcamps in Cloud & DevOps, Cybersecurity and Software Development. We're hiring an experienced Cloud & DevOps instructor to deliver our live cohort sessions starting July 2026. This is a part-time, fully remote role suited to working professionals who want to teach alongside their main job most of our instructors deliver 1-2 sessions per week. What you'll do: - Deliver live 2-3 hour cohort sessions on AWS, Docker, Terraform, CI/CD and three-tier architecture - Run weekly office hours and answer student questions in our Slack - Mark practical assignments and give feedback on portfolio projects - Support 8-15 students per cohort from week 1 to week 8 - Work from our existing curriculum and slide decks — no content creation required What you'll need: - 3+ years professional experience as a Cloud Engineer, DevOps Engineer, Platform Engineer or similar - Working knowledge...

Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...

pubGENIUS is a React.js and Next.js development agency and ad-tech startup. We build websites and apps for clients across the US and Europe, specializing in decentralized finance (DeFi, crypto, NFT, blockchain), fintech, and healthcare, with occasional work in e-commerce and other verticals. Beyond client work, we operate our own high-revenue web product with a website, mobile app, and machine learning systems powering our ad-tech optimization engine. Performance is not a preference here, it is a core requirement.   We are looking for a Principal Software Engineer, who will be the technical authority, responsible for all development, architecture decisions, and long-term technical strategy across a website, mobile app, and ML-powered ad-tech optimization systems. This is a full-time independent contractor engagement. You will work hands-on at a senior level where site speed and server performance are core success metrics. You will work directly with...

Mindrift is looking for highly skilled Senior Python Data Scraping Engineers to join the Tendem project and drive specialized data scraping workflows within our hybrid AI + human system. In this role, as an AI Pilot - that's how we refer to this role at Mindrift - you'll collaborate with Tendem Agents that handle repetitive tasks, while you provide critical thinking, domain expertise, and quality control to deliver accurate and actionable results. This part-time remote opportunity is ideal for technical professionals with hands-on experience in web scraping, data extraction and processing.   What We Do The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.   This is a freelance role for a Tendem project. As a Senior Python Data Scraping Engineer, you 'll handle data scraping tasks requiring technical...

Mindrift is looking for highly skilled Senior Python Data Scraping Engineers to join the Tendem project and drive specialized data scraping workflows within our hybrid AI + human system. In this role, as an AI Pilot - that's how we refer to this role at Mindrift - you'll collaborate with Tendem Agents that handle repetitive tasks, while you provide critical thinking, domain expertise, and quality control to deliver accurate and actionable results. This part-time remote opportunity is ideal for technical professionals with hands-on experience in web scraping, data extraction and processing. What We Do The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe. About the Role This is a freelance role for a Tendem project. As a Senior Python Data Scraping Engineer, you 'll handle data scraping tasks requiring technical...

Are you a coding expert fluent in Python eager to shape the future of AI? Large‑scale language models are evolving from clever chatbots into powerful engines of scientific discovery. With high‑quality training data, tomorrow's AI can democratize world‑class education, keep pace with cutting‑edge research, and streamline software development for engineers everywhere. That training data begins with you—we need your expertise to help power the next generation of AI. We're looking for Python coding specialists who live and breathe algorithms, data structures, software architecture, frontend and backend development, cloud infrastructure, and systems programming—and who can do so fluently using Python. You'll challenge advanced language models on topics like asynchronous programming, RESTful API integration, memory management, object-oriented design, secure coding practices, and debugging distributed systems—documenting every failure mode so we can harden model...

UK Research and Innovation (UKRI) is the national funding agency investing in science and research in the UK.   UKRI invests £8 billion of taxpayers' money each year into research and innovation and the people who make it happen. They work across a huge range of fields - from biodiversity conservation to quantum computing, and from space telescopes to innovative health care. They give everyone the opportunity to contribute and to benefit, bringing together people and organisations nationally and globally to create, develop and deploy new ideas and technologies.   As a Salesforce Test Engineer your main responsibilities will be to:   Identify and raise awareness of risks arising from the automation test results. Identify new and implement existing test frameworks to improve confidence in testing. Work closely with salesforce developers to reach a common understanding of the code base and test coverage at unit level. Collaborate...

Job Description Freelance Apprenticeship Assessment Assessor Location: Remote with travel for assessments Salary: up to £250 per day Line management responsibilities: No   Overview   Training Qualifications UK (TQUK) is the UKs fastest-growing awarding organisation and a market-leading assessment organisation. We partner with more than 500 schools, colleges, universities, and training providers worldwide, supporting over 150,000 learners each year through qualifications, endorsements, and apprenticeships.   Our success lies in doing things differently, placing innovation, integrity, and quality at the heart of everything we do.   The role of a Freelance Apprenticeship Assessment Assessor is to provide independent, fair, reliable, and consistent assessment services to Training Qualifications UK customers working with Apprenticeship Standards. Apprenticeship Assessment Assessors are required to use assessment...

Are you a coding expert fluent in Python eager to shape the future of AI? Large‑scale language models are evolving from clever chatbots into powerful engines of scientific discovery. With high‑quality training data, tomorrow's AI can democratize world‑class education, keep pace with cutting‑edge research, and streamline software development for engineers everywhere. That training data begins with you—we need your expertise to help power the next generation of AI. We're looking for Python coding specialists who live and breathe algorithms, data structures, software architecture, frontend and backend development, cloud infrastructure, and systems programming—and who can do so fluently using Python. You'll challenge advanced language models on topics like asynchronous programming, RESTful API integration, memory management, object-oriented design, secure coding practices, and debugging distributed systems—documenting every failure mode so we can harden model...

UK Research and Innovation (UKRI) is the national funding agency investing in science and research in the UK.   UKRI invests £8 billion of taxpayers' money each year into research and innovation and the people who make it happen. They work across a huge range of fields - from biodiversity conservation to quantum computing, and from space telescopes to innovative health care. They give everyone the opportunity to contribute and to benefit, bringing together people and organisations nationally and globally to create, develop and deploy new ideas and technologies.   The Data Engineer will be responsible for the requirements analysis and design of solutions for data platforms, ETL, integration and analysis solutions. Our toolset includes AWS hosted databases (postgres, S3 based data lake, MySQL, Athena), integration services (AWS API gateway, lambda functions), ETL services (AWS Glue, Step functions, AWS Batch), infrastructure management tools such as...

Are you a coding expert fluent in Python eager to shape the future of AI? Large‑scale language models are evolving from clever chatbots into powerful engines of scientific discovery. With high‑quality training data, tomorrow's AI can democratize world‑class education, keep pace with cutting‑edge research, and streamline software development for engineers everywhere. That training data begins with you—we need your expertise to help power the next generation of AI. We're looking for Python coding specialists who live and breathe algorithms, data structures, software architecture, frontend and backend development, cloud infrastructure, and systems programming—and who can do so fluently using Python. You'll challenge advanced language models on topics like asynchronous programming, RESTful API integration, memory management, object-oriented design, secure coding practices, and debugging distributed systems—documenting every failure mode so we can harden model...

The Office for National Statistics (ONS) is the UK's largest producer of official statistics, covering a range of key economic, social and demographic topics. These include measuring changes in the value of the UK economy, estimating the size, geographic distribution and characteristics of the population, and providing indicators of price inflation, employment, earnings, crime and migration.   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 security clearance.    As a Software Engineer (GCP, Java), your main responsibilities will be: Develop and maintain scalable, high-quality applications using Java and Spring Boot Design and...

Principal Engineer - Contract We are seeking an experienced Principal AI .NET Engineer to partner with client engineering teams in transforming software delivery through AI-assisted engineering, intelligent automation, and modern software development practices. This role combines deep technical expertise with strategic advisory and coaching responsibilities, helping organizations improve software quality, delivery cadence, and engineering effectiveness across the Software Development Lifecycle (SDLC). The successful candidate will assess existing engineering practices, architecture, tooling, and delivery processes to identify opportunities for enhancement—particularly through the adoption of AI-driven development workflows, agent-based engineering, automation, and modern DevOps practices. You will work closely with engineering leaders, architects, and delivery teams to implement scalable improvements that accelerate delivery while strengthening quality, compliance, and...

Rate: £650 per day (Inside IR35) Clearance: Active SC Clearance mandatory Location: Predominantly remote, with rare occasional visits to Newcastle Duration: 6 months+ We are seeking an experienced Full Stack Engineer to join a high-profile programme within a secure environment. This is a hands-on role for a versatile engineer comfortable working across the full development stack and delivering high-quality, production-ready software. Key Responsibilities Design, develop and maintain applications across both Front End and back-end Build robust, scalable and secure features from concept through to deployment Collaborate with architects, product owners and fellow engineers to deliver against requirements Contribute to technical design decisions and uphold engineering best practice Write clean, well-tested and maintainable code Support continuous integration and deployment pipelines Essential Skills & Experience Proven...

Job Description Freelance Apprenticeship Assessment Assessor Location: Remote with travel for assessments Salary: up to £250 per day Line management responsibilities: No   Overview   Training Qualifications UK (TQUK) is the UKs fastest-growing awarding organisation and a market-leading assessment organisation. We partner with more than 500 schools, colleges, universities, and training providers worldwide, supporting over 150,000 learners each year through qualifications, endorsements, and apprenticeships.   Our success lies in doing things differently, placing innovation, integrity, and quality at the heart of everything we do.   The role of a Freelance Apprenticeship Assessment Assessor is to provide independent, fair, reliable, and consistent assessment services to Training Qualifications UK customers working with Apprenticeship Standards. Apprenticeship Assessment Assessors are required to use assessment...