Senior Backend Engineer

Trading 212; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Trading 212 is seeking a Senior Backend Engineer to own backend services end to end within a microservices architecture. You will design, build and operate scalable, high-availability systems powering our trading platform used by millions of clients.

You’ll work with Java 21 (Spring), Go and Node.js (TypeScript), plus PostgreSQL/MariaDB and Redis, shaping performance, reliability and data integrity while collaborating with product and engineering to translate complex requirements into robust,

Qualifications

• Experience owning backend services in a microservices setup.
• Strong knowledge of HTTP, WebSockets and AMQP and when to use each.
• Production fluency in at least one modern backend framework.
• Deep understanding of relational databases, including indexing and transactions.
• Track record designing systems for high availability, scalability, and resilience.
• Clear, structured problem-solving and ability to explain technical trade-offs.
• Strong fundamentals and confidence learning new technologies.

Responsibilities

• Own backend solutions end to end from problem definition to production.
• Design and evolve services for performance, scale, resilience and data integrity.
• Make clear technical decisions with full context and trade-offs.
• Keep code and systems maintainable as requirements evolve.
• Diagnose production problems and address root causes.
• Collaborate with product and engineering to translate complex requirements into durable solutions.
• Review work, share knowledge and raise engineering standards.

Skills

Backend ownership

HTTP/WebSockets/AMQP knowledge

Backend framework fluency

Relational databases design

System design for high availability

Problem-solving

Learning unfamiliar technologies

Tools

Java 21 (Spring)

Go

Node.js (TypeScript)

PostgreSQL

MariaDB

Redis

Kafka

ClickHouse

Elasticsearch

Docker

Grafana

AWS

Kubernetes

Kibana

Job description

Our mission is to enable everyone to build wealth

We reinvent how trading and investing work by creating exceptional products people love.

That takes high standards, high velocity and engineers who own what they ship.

Today, we serve over 6 million clients, with more than €38 billion in assets under management. At that scale, performance, reliability and data integrity are part of the product.

Our platform is powered by a modern, high-performance engineering stack designed for scale and reliability: Java 21 (Spring), Go, Node.js (TypeScript), PostgreSQL, MariaDB, Redis, Kafka, ClickHouse, Elasticsearch, Docker, Grafana, AWS, Kubernetes and Kibana.

About The Role

Senior Backend Engineers work across our backend organisation. Your team match will reflect your strengths, interests and where you can contribute most.

Across every team, the model is the same: small, autonomous groups, short release cycles and ownership from problem definition through production.

What You’ll Do

• Own backend solutions end to end: understand the business problem, shape the requirements, design the solution, build it, test it, deploy it and run it in production.
• Design and evolve services for performance, scale, resilience and data integrity.
• Make clear technical decisions with a full understanding of the constraints, alternatives and trade-offs.
• Keep code and systems maintainable as products and requirements evolve.
• Diagnose difficult production problems, address their underlying causes and prevent recurrence.
• Work closely with product and engineering colleagues to turn complex requirements into simple, durable solutions.
• Review work critically, share knowledge and raise the engineering standard across the team.

What you need to have

• Proven ownership of backend services built and operated within a microservices architecture.
• A strong grasp of communication protocols such as HTTP, WebSockets and AMQP, including when to apply each.
• Production fluency in at least one modern backend framework.
• Deep knowledge of relational databases, including indexing, transactions, isolation levels, locking mechanisms and high-performance design.
• A track record of designing systems for high availability, scalability and resilience.
• Clear, structured problem-solving and the ability to explain technical decisions and trade-offs.
• Strong engineering fundamentals, sound judgement and confidence learning unfamiliar technologies.

Depth in one backend ecosystem and sound tool choice matter more than familiarity with every technology listed.

What To Expect

• Recruiter conversation
• Code Review
• System Design
• Managerial interview

Your recruiter will explain each stage clearly and follow up after every conversation.

Bring your ambition to Europe’s fastest-growing mobile broker!