Senior Backend Software Engineer

Trading 212; Poland; Hybrid; PLN 120,000 - 190,000; Full time

Job summary

Trading 212 in Poland is seeking software engineers to build scalable trading and investing platforms. You will work in autonomous teams, shaping requirements from end to end and delivering reliable, high-performance services.

You should have experience with microservices, modern web frameworks, and relational databases, plus Docker/Kubernetes. Join Europe’s fastest-growing mobile broker and help empower millions of clients.

Qualifications

• Experience with building services using a microservices architecture.
• Strong knowledge of HTTP, WebSockets and AMQP, and when to apply each.
• Experience with at least one modern web framework.
• Deep understanding of relational databases, including indexing and transactions.
• Ability to design and operate systems that perform reliably at scale.

Responsibilities

• Develop solutions by taking a holistic approach to problem solving and understanding business needs.
• Engage in the full SDLC from requirements to deployment and monitoring.
• Take full ownership of code and maintain it to a high standard, refactoring when needed.
• Build for performance, scale, and resilience with low downtime.
• Work in small autonomous teams with short release cycles.
• Learn from peers and share knowledge to improve continuously.

Skills

Microservices architecture

HTTP / WebSockets / AMQP

Modern web framework experience

Relational databases & indexing

Designing scalable distributed systems

Tools

Docker

Kubernetes (k8s)

PostgreSQL

Elasticsearch

Job description

Our mission is to enable everyone to build wealth. We reinvent how trading and investing work by creating exceptional products people love. Fostering a culture of excellence and high velocity is the key to our success. Today, we serve over 6 million clients, with more than €38 billion in assets under management, a testament to the scale and trust we’ve built in just a few years. 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, k8s, Kibana. We offer remote or hybrid working, depending on role, with flexibility balanced against team performance and collaboration needs. We also provide an attractive benefits package, which may vary depending on your location. Full details will be shared during the initial screening, and we encourage you to come prepared with any questions.

What you’ll do

• Develop solutions by taking a holistic approach to problem solving, understanding business needs, service architecture, and underlying technologies and infrastructure.
• Engage in the full SDLC: from forming requirements, design, implementation, testing, deployment, to monitoring, ownership sits with you end to end.
• Take full ownership of your code and maintain it to a high standard, continuously improving and refactoring when needed.
• Build for performance, scale, and resilience, operating in an environment where downtime, latency, and data loss are not acceptable.
• Work in small, autonomous teams with short release cycles, balancing speed with engineering discipline.
• Learn from peers and actively share knowledge, contributing to a culture of honest feedback and continuous improvement.

What you need to have

• Experience building services in a microservices architecture.
• Strong understanding of communication protocols such as HTTP, WebSockets, and AMQP, and when to apply each.
• Experience with at least one modern web framework (language-agnostic mindset preferred).
• Deep understanding of relational databases, including indexing, transactions, isolation levels, locking mechanisms, and high-performance design.
• Ability to design and operate systems that perform reliably at scale.

All applicants will be contacted, regardless of whether they are selected! Bring your ambition to Europe’s fastest-growing mobile broker!