20 senior software engineer jobs found

Senior Software Engineer – RUST   Contract initial 12 months Outside ir35 Hybrid or Remote   Overall Ambition   Solve some of today's most complex hospitality challenges by creating innovative, scalable technology using a modern, open technology stack. Help shape the technical direction of our products while delivering exceptional customer experiences across the USA.   What We're Looking For   We're looking for a Contract Senior Software Engineer to join our passionate, lean, agile, fast-growing and evolving technology team on a permanent basis.   You'll be an experienced engineer who enjoys solving difficult technical problems, building highly scalable systems and helping those around you become better engineers. You'll be comfortable owning complex initiatives from design through to production, influencing technical direction and driving engineering excellence across multiple teams....

Senior Software Engineer - AI Interaction Evaluator (Codex / Claude Code, up to $200/hr) We’re looking for highly experienced software engineer (SR+) to help evaluate the quality of interactions with modern coding agents such as OpenAI Codex and Claude Code. This is not a traditional engineering role. You won’t be writing production code. You’ll be evaluating something harder: whether the model thinks like a great engineer.   What This Role Actually Is You will assess how AI coding agents behave in real-world scenarios — focusing on: Whether the response makes sense Whether the preamble and reasoning are useful Whether the output reflects strong engineering judgment Whether the interaction feels right to an experienced developer This role is about engineering taste — not syntax correctness.   What You’ll Be Doing Evaluate AI-generated...

Location: Remote (EST 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 Solutions Engineer at YLD, you'll embed with a banking client during a proof-of-value or implementation, turning their product requirements into working configuration on the client's...

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...

About Us   We are a technology solutions provider specialising in the public sector. Our mission is to help government organisations become truly data-driven by transforming their digital services, streamlining operational processes, improving citizen outcomes, and enhancing transparency across public services. We work closely with government bodies to design and deliver modern, secure, and scalable digital solutions that have real-world impact.   The Role   We are looking to engage a Data Engin eer on a contract basis to support the delivery of high-quality digital services within the UK public sector. You will lead the design, development, and evolution of scalable data infrastructure, pipelines, and analytics platforms, working closely with our existing Data Engineers, Data Architects, Analysts and wider delivery teams to deliver high-performance data solutions.   This role requires deep knowledge of data engineering best...

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 connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment.What this opportunity involves: We're building a dataset to evaluate AI coding agents - how well a model handles real-world developer tasks. You'll create challenging tasks and evaluation criteria within realistic simulated environments: Build realistic developer environments - a virtual company with codebase, infrastructure, and context (tickets, docs, conversations) that forms a believable development history Design tasks from intermediate states of these environments - craft the prompt, define what "solved" means, and ensure the task is solvable by an AI agent Write tests that verify agent solutions - accept all valid approaches and reject incorrect ones, neither too strict nor too lenient Iterate on tasks and tests based on QA feedback - review agent...

Job Purpose As a Senior Power Platform Developer with experience of implementing solutions using the Microsoft Power platform toolset, the role holder will work as part of a multidisciplinary team delivering a new assessment platform for the Research Excellence Framework (REF). With a passion for cutting edge technology and embracing low code platforms such as the MS Power Platform, the role holder will provide technical input and innovation to ensure appropriate solutions are in place to meet business requirements. As a Power Platform Engineer you will design, build, and maintain low code solutions that support UKRI’s strategic and operational objectives. The role enables teams across UKRI to automate processes, improve data accessibility and deliver secure, scalable digital services using Microsoft Power Platform technologies. Working closely with product owners, business analysts and technical teams you will translate...

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...

Please submit your CV in English and indicate your level of English proficiency. Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment.What this opportunity involves: We 're building a dataset to evaluate AI coding agents - how well a model handles real-world developer tasks. You 'll create challenging tasks and evaluation criteria within realistic simulated environments: Build realistic developer environments - a virtual company with codebase, infrastructure, and context (tickets, docs, conversations) that forms a believable development history Design tasks from intermediate states of these environments - craft the prompt, define what ʺsolved ʺ means, and ensure the task is solvable by an AI agent Write tests that verify agent solutions - accept all valid approaches and reject incorrect ones, neither too...

Location: Remote 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 Forward Deployment Engineer at YLD, you'll embed with a banking client during a proof-of-value or implementation, turning their product requirements into working configuration on the client's platform. You'll sit...

Freelance Backend Engineer - Kotlin (m/f/d) - UK market Why voize? Because we’re more than just a job! At voize, we believe the greatest gift to frontline workers is time - time to care, connect, and be present. Today, that time is lost to admin work that pulls nurses away from what matters most: people .   💡 Your Mission As a Freelance Senior Backend Engineer for our UK Market squad , you’ll ensure that data flows smoothly between our products and our partners' software solutions. You'll build and maintain the integrations that connect the voize with senior care and hospital software platforms. We are open for you to be based in France, Germany or England.   🚀 Your Daily Business – No two days are alike Shape the future of our integrations – Develop interfaces that seamlessly connect voize with systems in the care and medical sector Build future-proof solutions – Develop a scalable API, set...

Senior AI Engineer | Freelance Remote Contract (UK Candidates only) Ideal start date: ASAP Contract Duration: 6 Months Outside IR35 Rate: £500-600 p/d Elsewhen, a London-based consultancy, designs and builds technology solutions for clients like Spotify, Google, Inmarsat, and Zego. Over the past decade, we have built a workplace prioritising impact, drive, and friendliness. We value outcomes over hours and agility over rigid processes. Work Environment: Fully Remote in the UK Join our team: https://www.elsewhen.com . We are looking for a talented Senior AI Engineer to join a brand new delivery squad focused on solving new client problems in 4-week cycles. Each project is designed to produce a working pilot that demonstrates clear value, not a polished long-term system. You’ll work in a 4-person team (AI Engineer, Product Manager, Data Scientist, Principal for AI...

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...

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...

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...

This is a full-time remote contract role for an initial 3-6 months. About Nearform Nearform is an independent team of data & AI experts, engineers, and designers who build intelligent digital solutions and capability at pace. We create AI-enabled solutions that enhance digital experiences, empower developers, and deliver measurable results. In these ways, we partner with ambitious enterprises to deliver enduring impact. Our deep expertise in solving the world’s most complex digital problems, along with our collaborative, people-first approach, enables enterprises to build breakthrough products and modernise legacy systems by unleashing the power of AI. Today, our team of 500 experts in 20+ countries is trusted by leading enterprises including Lululemon, Puma, Sun Life, Starbucks, Travelex, Virgin Media 02, and Walmart.   As part of our Design function, you will play a key role in crafting intuitive and impactful software experiences that align...

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.    Companies House drives confidence in the economy and makes the UK a great place to start, and run, a business.   As an executive agency sponsored by The Department for Business and Trade (DBT) we have the ability to play a leading role in the right against corrupt business practices by providing the transparency and clarity necessary for the UK to continue to be regarded as a world-leading place to do business.   Companies House is undergoing an historic change - to our systems, culture, services, and ways of working. Our people are at the heart of these changes....

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...

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...