Staff Backend Engineer: Scale, Reliability & Architecture

Trading 212 Ltd.; Polska; On-site; PLN 180,000 - 340,000; Full time

Job summary

Trading 212 Ltd. is seeking a Staff Backend Engineer to shape technical direction across teams, tackling high-consequence backend problems that span services and product domains.

You will stay hands-on, mentor senior engineers and collaborate with product leaders on sequencing and long-term technical investments. A focus on reliability, data integrity and scalable design drives this role.

Qualifications

• Evidence of technical impact across multiple teams or a substantial product domain.
• Deep ownership of distributed backend systems operating at meaningful scale.
• Strong judgement in service boundaries, asynchronous communication, data ownership, consistency and failure modes.
• Deep knowledge of relational databases, transactions, concurrency and high-performance design.
• A track record of improving reliability, scalability, observability or developer effectiveness through durable mechanisms.
• The ability to influence technical direction through evidence, clarity and trusted execution rather than title.
• Clear communication that helps teams act on complex technical decisions.
• Strong engineering fundamentals and the judgement to choose when to standardise, simplify or leave a system alone.

Responsibilities

• Own high-consequence backend problems that span services, teams or product domains.
• Establish clear system boundaries and architectural direction without creating unnecessary central control.
• Lead technical decisions by making constraints, alternatives, risks and trade-offs explicit.
• Improve performance, resilience, data integrity, operability and failure handling across production systems.
• Resolve recurring structural problems rather than treating symptoms team by team.
• Remain hands-on where implementation, diagnosis or prototyping is the fastest way to create clarity.
• Mentor senior engineers, raise review quality and make strong engineering judgement easier to reproduce across teams.
• Partner with engineering and product leaders on sequencing, risk and long-term technical investment.

Skills

Distributed systems

Backend architecture

Data integrity

Relational databases

Technical judgement

Mentoring

Communication

Tools

Java

Spring

Go

TypeScript

Node.js

PostgreSQL

Redis

Kafka

Elasticsearch

Docker

Kubernetes

AWS

Job description

Trading 212 Ltd. is seeking a Staff Backend Engineer to shape technical direction across teams, tackling high-consequence backend problems that span services and product domains.

You will stay hands-on, mentor senior engineers and collaborate with product leaders on sequencing and long-term technical investments. A focus on reliability, data integrity and scalable design drives this role.