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.

As a polyglot engineer, you'll work across the full stack. That means crafting intuitive user interfaces one day and building robust backend APIs the next. You'll be equally excited about both.

What You'll Do

Build and deliver across the stack. This is a hands-on role where you'll write high-quality, tested code and move features from idea to production. Sometimes that's a user-facing component. Sometimes it's a backend API. Often it's both.

Own your features end to end. You'll take responsibility from the UI to the database. That means figuring out the path forward, asking the right questions, and driving your work to completion with support from the team.

Build with security in mind. For us, building safe, sound, and compliant systems is non-negotiable and part of our craft. You'll implement security best practices in everything you build, including navigating the emerging challenges of AI safety.

Be a great teammate. We expect you to be an active participant in our engineering culture. That means offering and receiving constructive code reviews, helping your peers when they're blocked, and sharing what you learn. We succeed as a team.

Communicate proactively. We value open communication about progress and blockers. This helps us support each other effectively and keeps the whole team aligned. No one should have to chase you for updates

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What We're Looking For

We know that people from underrepresented groups are less likely to apply if they don't meet 100% of the criteria. If you're excited about this role but your experience doesn't align perfectly with every qualification, we encourage you to apply anyway. You may be just the right candidate for this or other roles.

You should have

• Experience building and deploying production applications, whether that's frontend, backend, or both
• Proficiency in at least two of these languages: Python, TypeScript/JavaScript, Go, or Java
• Experience building user-facing features with modern frontend frameworks like React, Vue, or Angular
• Experience building backend services and APIs that are reliable and maintainable
• Comfort with containerised environments (we use OpenShift, but Kubernetes or Docker experience transfers well)
• Practical experience with CI/CD pipelines and a belief in automating things
• Solid experience working with relational databases like Postgres or MySQL

What matters most to us

A solutions-first mindset. You find the best path to solve the problem, whether that's writing new code, improving an old system, or integrating the right tool. The outcome is what matters.

A bias for action and a focus on shipping. You understand our goal is to deliver value to users, not just to write perfect code. You know when to be pragmatic and when to invest in technical excellence.

Clear communication and collaboration. You're proactive about sharing your progress and asking for help when you need it. You understand that keeping the team aligned helps everyone succeed.

A collaborative spirit. You find satisfaction in building high-quality software and you thrive in a team environment where you can learn from and help your peers.

A security-conscious approach. You see security and safety as part of the job, not an afterthought.

Bonus points for

• Direct experience with Generative AI concepts, LLMs, or related personal or professional projects
• Contributions to open-source projects or a portfolio that demonstrates your range
• Experience working in highly regulated environments

Our Tech Stack

We work with Python, TypeScript, Go, and Java on the backend. Our frontend is built with TypeScript, React, and Next.js. We use Postgres for our database, run everything on Kubernetes (specifically Red Hat OpenShift), and our DevOps setup includes GitHub and CI/CD tools like Tekton and Harness.

Our Team and Mission

We're the Common Platform Engineering team for GenAI, a central group in the Chief Technology Office. We're a focused agile team that owns our work from idea to production.

Our culture is built on a shared belief in engineering craftsmanship, backed by leadership that actually understands what that means. We're on a journey to prove what's possible inside a large organisation, and that means navigating some legacy while building the future. This isn't a role for someone who wants everything to be perfect on day one. It's for an engineer who wants to be part of the team that gets us there.

We have a dual mission. First, we're building 'Citi Assist', the GenAI digital assistant for our colleagues. Second, we're providing the platforms and guidance that enable the entire organisation to adopt GenAI safely and effectively.

This is not a typical banking job. We'll build foundational technology together that has a direct, positive impact on hundreds of thousands of people. We'll tackle big problems as a team, with executive support behind us. We'll shape our solutions collaboratively, learning from each other along the way. You'll have real autonomy in your work, but you'll never be on your own.

What we’ll provide you

This is a unique role that will put you in the position to be part of a new venture and actively drive change. Every day there will be new challenges that will help you develop new skills that can drive your career.

By joining Citi London, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends

Visit our Global Benefits page to learn more.

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive

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Job Family Group:

Technology

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Job Family:

Applications Development

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Time Type:

Full time

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Most Relevant Skills

Please see the requirements listed above.

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Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.