Senior Golang Engineer – AI Products & Platforms

Citi; Greater London; On-site; GBP 90,000 - 150,000; Full time

Benefits offered by this job

27 days annual leave

Discretionary bonus

Private Medical Care

Life Insurance

Employee Assistance Program

Pension Plan

Paid Parental Leave

Special discounts

Job summary

Citi's AI Product & Platform team invites you to join a high-growth engineering group within the Chief Technology Office, building next-generation AI-powered products and platforms. You will design scalable Golang services, contribute to cloud-native microservices, and collaborate with AI specialists to deliver production-ready solutions.

You will mentor engineers, push code quality, and help shape an engineering culture focused on performance and observability.

Qualifications

• Golang expert with production experience building scalable backend services.
• Experience designing large-scale backend APIs.
• Experience with microservices and distributed systems.
• Familiarity with cloud-native tech, containers, and Kubernetes.
• Strong fundamentals in software engineering, system design and performance.
• Experience shipping products from concept to production.
• Exposure to AI/ML or LLM-powered apps is desirable.
• Passion for modern engineering practices and continuous learning.

Responsibilities

• Design and build AI-powered products and platforms using Golang.
• Develop high-performance backend services and APIs at enterprise scale.
• Build and enhance internal developer tools, frameworks and reusable components.
• Partner with product, engineering and AI teams to production-ready solutions.
• Contribute to cloud-native, microservices-based architectures.
• Drive engineering best practices across code quality, testing, observability and CI/CD.
• Solve distributed systems challenges focusing on scalability, resilience and performance.
• Mentor engineers and foster a collaborative, high-performing culture.

Skills

Golang

Backend API design

Microservices

Cloud-native/Kubernetes

Distributed systems

Performance optimization

AI/ML exposure

Job description

About the Role

Join Citi’s AI Product & Platform team, a high‑growth engineering group operating with a start‑up mentality inside one of the world’s largest financial institutions. Working within the Chief Technology Office, you’ll help build the next generation of AI‑powered products and platforms that will shape how technology is delivered across the bank. This is an opportunity to work at the forefront of Generative AI, cloud‑native engineering and distributed systems, building scalable solutions from the ground up while collaborating with some of the industry’s most talented engineers and AI specialists.

Key Responsibilities

• Design and build AI-powered products and platforms using Golang.
• Develop high‑performance backend services and APIs that operate at enterprise scale.
• Build and enhance internal developer tools, frameworks and reusable components.
• Partner with product, engineering and AI teams to turn innovative ideas into production‑ready solutions.
• Contribute to the design and implementation of cloud‑native, microservices‑based architectures.
• Drive engineering best practices across code quality, testing, observability and CI/CD.
• Solve complex distributed systems challenges, focusing on scalability, resilience and performance.
• Mentor engineers and contribute to a collaborative, high‑performing engineering culture.

Skills & Experience

• Golang (Go) expertise is essential, with a proven track record of building scalable, business‑critical applications in production environments.
• Strong experience designing and developing large‑scale backend services and APIs.
• Proven ability to build and operate systems within microservices and distributed environments.
• Experience with cloud‑native technologies, containerisation and Kubernetes.
• Strong understanding of software engineering fundamentals, system design and performance optimisation.
• Experience building products and platforms from concept through to production.
• Exposure to AI, Machine Learning or LLM‑powered applications is highly desirable.
• A passion for modern engineering practices, continuous learning and solving complex technical problems.

Benefits

• 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

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.

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