The Opportunity This is your chance to build the foundational systems for 'Citi Assist', a Generative AI assistant that will reach every Citi employee globally. You'll join us on the ground floor, becoming a core builder on a high-visibility platform that sets the standard for how a global bank adopts this technology safely and at scale. Here's what makes this role unique: we know that data is the key to building a successful, safe, and scalable generative AI assistant. The difference between a good AI product and a great one isn't just the model—it's the testing, evaluation, and feedback loops that make it better every day. As a data-focused full-stack engineer, you'll help us craft the tools and systems that let us understand how Assist is performing, where it's succeeding, and where it needs to improve. You'll work across the stack, building everything from intuitive dashboards that surface insights to robust backend pipelines that process evaluation data at scale....

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.   Why Citi? Over 200 years in business with a wonderful team of creative, visionary, and entrepreneurial thinkers. Tremendous opportunities to advance, open to everyone across all levels. Learn and grow simultaneously! We a unique journey of personal and professional development,...

At Citi, we are pioneering the future of enterprise operations through innovative technology. Our COO-Technology Engineering and Architecture capability is at the forefront, responsible for architecting best-in-class solutions, driving end-to-end transformation, and integrating cutting-edge Generative AI solutions to unlock unparalleled efficiency, automation, and risk reduction across our global operations. The Team: Innovating at Scale Our team is a dynamic hub of engineers and innovators dedicated to solving complex business challenges with intelligent solutions. We believe in building robust, scalable products that deliver tangible impact. We foster an environment of continuous learning, rapid iteration, and strong engineering practices. Here, you'll work alongside passionate experts, leverage the latest in AI, and contribute to a culture that values clean code, thoughtful design, and direct, hands-on problem-solving. We're not just adopting AI; we're building the...

Senior Ruby on Rails Engineer Remote 60,000 - 80,000 + Private Healthcare & Benefits This is an excellent opportunity for a Mid-to-Senior Ruby on Rails Engineer to join a start-up in a role where you will play a major part in future developments. This company is a Series A startup, breaking down barriers and making the world more accessible for everyone. Originally founded within the UK transport sector, they have developed award-winning, innovative solutions that prioritise dignity, safety, and inclusion for millions of users. In this varied role, you will move beyond feature development to focus on the stability, performance, and observability of the core Rails ecosystem. You will act as a trusted backend partner for Product and Platform teams, stabilising third-party integrations, improving background job efficiency, and utilising architectural documentation like C4 models to ensure long-term scalability. The ideal candidate will be a seasoned Ruby on Rails developer...

Senior Front-End Developer (React, TypeScript) - VP, FX Options Pricing Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. The Opportunity We are seeking a highly skilled and motivated Senior Front-End Developer to join a critical greenfield program focused on transforming our electronic FX Options Trading business. This is a multi-year,...

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech . As an Engineering Manager you will improve the productivity of engineers, create effective reporting mechanisms, and ensure timely and budget-conscious completion of work within the Site Reliability Engineering (SRE) team. You will play a crucial role in driving operational excellence, fostering...

Why   Citi     Citi, the leading global bank, has approximately 200 million customer accounts and does business in more than 160 countries and   jurisdictions . Citi provides consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management.     As a bank with a brain and a soul, Citi creates economic value that is systemically responsible   and in our clients’   best interests. As a financial institution that touches every region of the world and every sector that shapes your daily life, our Enterprise Operations & Technology teams are charged with a mission that rivals any large tech company. Our technology solutions are the foundations of everything we do from keeping the bank safe, managing global resources, and providing the technical tools our workers...

eTrading Infrastructure Systems Architect - Low Latency Engineering (Rates Tech) Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. About the Position:   We are looking for an industry wide Senior Systems Architect (Infrastructure) who can provide leadership and direction for Change-The-Bank (CTB) electronic trading infrastructure initiatives...

Structural Engineer London EC2 37k- 43k An exciting opportunity has arisen for a Structural Engineer seeking a new challenge. You will be joining the Civil & Structural Engineering division within this well established and highly reputable property consultancy working on buildings projects. The firm covers architecture, MEP, Surveying, Sustainability, Masterplanning and structural design. They have around 150 staff and have been established over 100 years with a highly reputable industry name. They are backed by a large investment firm meaning that they are assured financial stability and are in an excellent market position for continued success. They work on a collaborative basis between teams and are able to offer the ability of all round resource to clients. They offer a mutual team support philosophy and bonus to incorporate a team sharing ethos rather than separate teams just acting as cost centres. They work to unlock efficiencies as a business to enhance margins...

Senior Structural Engineer London EC2 55k- 65k Are you a Chartered structural engineer seeking a new challenge? Are you forward thinking and dynamic in your design approach? Able to manage projects and do you enjoy diversity of work? You will be involved in RIBA projects at stage 1 & 2, so good concept design skills, creativity and liaison skills are essential. You will be joining the Civil & Structural Engineering division within this well established and highly reputable property consultancy working on buildings projects. The firm covers architecture, MEP, Surveying, Sustainability, Masterplanning and structural design. They have around 200 staff and have been established over 100 years with a highly reputable industry name. They are backed by a large investment firm meaning that they are assured financial stability and are in an excellent market position for continued success. They work on a collaborative basis between teams and are able to offer the ability...

Contract Maintenance Engineer - West London (Outside IR35) Rate: Outside IR35 LTD or Umbrella Hours: 8-hour shifts - Monday to Friday 6am-2pm Length: 24+ months (long-term) Start: ASAP About the Role We're looking for an experienced Contract Maintenance Engineer to join a packaging manufacturer in West London. This is a hands-on, long-term contract where you'll keep high-speed production lines running smoothly in a modern, well-invested site. Why Apply? Outside IR35 (LTD or umbrella) 12+ month contract with long-term security Supportive team with great feedback from current engineers Key Duties Preventive and reactive maintenance of machinery Mechanical/electrical fault finding and repairs Work on conveyors and automated production equipment Minimise downtime and support continuous improvement What We're Looking For Mechanical or Electrical qualification (Apprenticeship / NVQ / C&G) Hands-on experience as a Maintenance Engineer in...

Our client has been building their business to comfortably sit alongside the elite consulting engineering business involved in the British construction industry. Employing staff across a talented and diverse team of multidisciplinary capabilities. This agile and intelligent business has positioned itself at the forefront of the built and natural environment, collaborating with an enviable variety of customers to provide the very best advice and consultative services for complex projects within both the public and private sector. They specialise in the delivery of building services, energy and sustainability services and deliver mechanical and electrical engineering design solutions from initial feasibility stages through detailed design and on to construction, handover and post-occupancy. They offer a refreshing approach to M&E, getting involved early and working collaboratively with the design team, whilst highlighting options, guiding design development and using...

Contract Maintenance Engineer - West London (Outside IR35) Rate: Outside IR35 LTD or Umbrella Hours: 8-hour shifts - Monday to Friday 6am-2pm Length: 12+ months (long-term) Start: ASAP About the Role We're looking for an experienced Contract Maintenance Engineer to join a packaging manufacturer in West London. This is a hands-on, long-term contract where you'll keep high-speed production lines running smoothly in a modern, well-invested site. Why Apply? Outside IR35 (LTD or umbrella) 12+ month contract with long-term security Supportive team with great feedback from current engineers Key Duties Preventive and reactive maintenance of machinery Mechanical/electrical fault finding and repairs Work on conveyors and automated production equipment Minimise downtime and support continuous improvement What We're Looking For Mechanical or Electrical qualification (Apprenticeship / NVQ / C&G) Hands-on experience as a Maintenance Engineer in...