Staff Backend Engineer

Sofia remote Until 8/21/2026 First posted March 26, 2025 Last posted March 28, 2026
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

  • Lead the technical development of an entire business domain. Engage in forming requirements, design the architecture, and lead the entire software development life cycle.

  • Lead a compact, autonomous, cross-functional team with short release cycles - we rely on agile, independent teams of sharp and driven people with just the right amount of processes to steer off anarchy and not sacrifice velocity. Find the most valuable strengths of your teammates and provide them with mentorship in order to develop them further.

  • Develop solutions by taking a holistic approach to problem-solving - we expect you to understand the business problems, our service architecture and the underlying technologies and infrastructure and take everything into consideration.

  • Develop for performance, scale and resilience – your code will run in an uncompromising environment. Downtime, latency and data loss are intolerable.

  • Take initiative to identify areas of product improvement.

What you need to have

  • Experience in leading the development and subsequent release of a complex/high-demand client-facing product.

  • Experience in leading, coaching, and mentoring software engineers towards delivering high-quality software together with them.

  • Experience with developing services in a microservice architecture. 

  • Advanced knowledge of at least two programming languages.

  • Deep understanding of RDBMS, messaging brokers and in-memory data storages.

All applicants will be contacted, regardless of whether they are selected!

Are you ready to accelerate your career with us? We'd love to hear from you!

We process applicant data confidentially and in accordance with applicable data protection laws. We may use AI-powered tools to help review applications, but all hiring decisions are made by our human recruitment team. Where required by law, we rely on your consent to use these tools.
You may withdraw this consent or exercise your data protection rights at any time by contacting us.

About this role

Summary

Lead backend development, design architecture, mentor engineers, optimize for performance and scale.

Job title

Staff Backend Engineer

Experience level

not specified

Industry

financial technology

Location requirements

remote or hybrid work in Sofia

Salary

Not specified

Management role

Yes

Skills & keywords

Required skills

JavaGoNode.jsPostgreSQLmicroservice architectureRDBMSmessaging brokersin-memory data storage

Preferred skills

None specified

Specializations

backendmicroservicesperformancescalability
Locations

Structured locations inferred from the posting.

Sofia, Bulgaria

Hybrid City