Senior Software Engineer - Java/Kotlin (Developer Enablement) - Vice President

Citigroup Inc.; Belfast; Hybrid; GBP 45,000 - 70,000; Full time

Job summary

A global financial institution is seeking talented Server-Side Engineers in Belfast. You'll engage in high-impact projects within the CTO organization, focusing on developer platforms and internal tools. This role involves building innovative solutions using Kotlin or Java and databases like PostgreSQL and MongoDB, while working in an agile team that values collaboration and engineering excellence. The company offers a hybrid model, competitive salary, and comprehensive benefits.

Benefits

27 days annual leave

Discretionary annual performance-related bonus

Private Medical Care & Life Insurance

Employee Assistance Program

Pension Plan

Paid Parental Leave

Learning and development resources

Qualifications

• Experience building and consuming RESTful APIs.
• Familiarity with CI/CD tools and automated deployments.
• Comfortable collaborating across teams.

Responsibilities

• Work within Developer Enablement in the CTO organization.
• Contribute to the SDLC Automation greenfield project.
• Participate in building the next-generation Developer Experience platform.

Skills

Strong server-side engineering skills: Kotlin or Java

Proficiency with relational and/or NoSQL databases: PostgreSQL, MongoDB

Experience with event-driven architecture

Experience with microservice architecture

Understanding of containerization (Docker) and orchestration (Kubernetes)

Experience with message queuing systems: Apache Kafka

Tools

Kotlin

Java

PostgreSQL

MongoDB

Apache Kafka

Docker

Kubernetes

Job description

We’re looking for multiple talented engineers, Server Side, to join one of our high-impact teams inside Citi’s CTO organization. You’ll sit within Developer Enablement, a group focused on innovation, developer platforms and internal tools used across the bank, where we experiment and ship fast like a startup inside a global bank. Our mission is to save our engineers tens of minutes per day, equating to £10,000,000s of savings at Citi’s scale.

Opportunities in CTO

There are many exciting opportunities for you and flexibility to move between multiple projects if that’s something you’d enjoy.

SDLC Automation

SDLC Automation is a greenfield project that builds on the success we’ve had in automating the SDLC and takes it further. This blue‑sky project looks at ways we can greatly improve the SDLC process at Citi, taking ideas like grad­ing engineering teams and rewarding those who follow best practices, perhaps moving them from manual approval to an automatic one. The use of Artificial Intelligence is highly likely.

Dev hub

Dev hub is the Engineers homepage where engineers can see all parts of the SDL(C), such as code reviews, JIRAs and deployments, all tied together into a single workflow. The next‑generation greenfield Developer Experience (DevEx) platform aims to save days of engineering time per engineer per year at one of the largest engineering organisations in the world. Transforming the way engineers work at Citi.

Why you'll love working here

• You get to work in the engineering focused part of the bank, the Chief Technology Office building tools for other engineers
• You’ll work in a small, agile team, in an organisation led by technologists.
• You’ll impact the daily experience of tens of thousands of engineers at one of the largest engineering organisations in the world.

What you will bring

A selection of the tools and capabilities required across our platforms. We value multi‑disciplined polyglot engineers but also understand and support the need for specialisms too across the wider department.

Server

• Strong server‑side engineering skills: Kotlin or Java (we’re using Java 21), building and consuming RESTful APIs.
• Proficiency with relational and/or NoSQL databases: PostgreSQL, MongoDB.

Desirable skills

• Experience with event‑driven architecture.
• Experience with microservice architecture.
• Contract first APIs, such as swagger.
• Experience with message queuing systems: Apache Kafka.
• SRE/DevOps – Experience with scalability & Observability.
• Understanding of containerization (Docker) and orchestration (Kubernetes).
• Familiarity with CI/CD tools and automated deployments.
• Comfortable collaborating with product, design, and UI engineers, product managers, and other stakeholders to understand requirements and deliver robust backend solutions.

Tools you’ll use

• Server: Kotlin, Java, Spring Boot, http4k, ktor, PostgreSQL, MongoDB, Apache Kafka, Docker, Kubernetes, Helm, Tekton, Harness.
• Infra: OpenShift, Tekton, Harness.
• Mac or PC – It’s up to you.
• Access to time‑saving AI tools such as GitHub Copilot and Cognition.ai’s Devin.

By joining Citi Belfast, 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 discretionary annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources.

Visit our Global Benefits page to learn more.

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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.