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Staff Software Engineer/Tech Lead (Distributed systems)

https://www.citi.com/ Logo

Citi

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Location:
United Kingdom , Belfast

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

We’re looking for exceptional Staff Software Engineer to help build and tech lead our next-generation Developer Experience (DevEx) platform at Citi using Kotlin. You’ll be joining a small, high-impact team, shaping the daily lives of our 50,000 engineers globally by building the cockpit where engineers can see all parts of the software development life cycle tied together into a workflow in near real-time, being able to action and monitor agentic AI flows from the cockpit.

Job Responsibility:

  • Lead the architectural design of the system that takes into consideration our future near real-time requirements, complex data integration, and scalability
  • Create core architectural principles, engineering best practices, and deliver performance SLAs for the platform
  • Be the technical authority in solving ambiguous, large-scale engineering challenges
  • Mentor fellow engineers, fostering a culture of technical excellence, collaborative problem-solving, and continuous learning
  • Deliver key parts of the system that support part of the SDLC workflow, such as tracing a JIRA ticket's progression through build, test, and deployment into production
  • Ensure the platform's architecture and implementation is technically robust could theoretically scale to 10,000 users in near real-time

Requirements:

  • Deep expertise (10-15+ years) in server-side engineering: Kotlin (or Java with a strong desire to learn Kotlin), building and consuming RESTful APIs, asynchronous programming
  • Proficiency in Event-Driven architectures, and related principles
  • Expertise with relational and/or NoSQL databases: PostgreSQL, MongoDB
  • Experience with Design patterns for high-throughput, low-latency data streams
  • Deep understanding of containerization (Docker) and orchestration (Kubernetes)
  • Familiarity with CI/CD tools like Tekton and deployment automation platforms like Harness
  • Comfortable collaborating with product, design, and UI engineers, and other stakeholders to understand requirements and deliver robust backend solutions
What we offer:
  • 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
  • Access to an array of learning and development resources

Additional Information:

Job Posted:
December 28, 2025

Employment Type:
Fulltime
Work Type:
On-site work
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