Junior Backend Developer - Sports Trading
Summary
Junior backend developer building real-time sports trading infrastructure in Lisbon (hybrid): designing and deploying scalable APIs and databases that aggregate odds and liquidity from multiple sportsbooks. Core stack is SQL, Node.js and TypeScript, with Rust and Python as pluses.
Junior Backend Developer - Sports Trading
Lisbon (Hybrid)
Full-time
About the Role
We built a real-time sports trading infrastructure that aggregates odds and liquidity from multiple sportsbooks into a single unified platform. Users can execute trades seamlessly at the best available prices and liquidity across multiple venues in one click.
As a Backend Developer, you will play a key role in developing and deploying scalable API infrastructure. You will also be involved in database design, optimization, and management.
You will work closely with a small team of 3-4 engineers to build robust, high-performance backend systems capable of handling high-frequency data flows and real-time execution.
If you enjoy solving distributed systems challenges, optimizing for latency, and designing reliable API architectures, this role is for you.
Preferred Background
- 2+ years of backend development experience
- Mandatory experience in SQL / Node.js (and API frameworks) / Typescript
- Experience with Git, GitHub / GitLab or equivalent
- Finance knowledge is a plus
- Sports knowledge is plus
- Experience in Rust
- Experience in Python
Must Haves
- You get things done.
- You’re willing to work long hours to achieve goals.
- You’re relentless and surpass expectations.
- You hold high standards, always putting customers first.
- You’re driven, go above and beyond, and strive for excellence.
- You communicate clearly and effectively.
- You’re not afraid to challenge ideas or disagree when it matters, fostering a team-oriented approach.
- You work autonomously and thrive independently.
- You’re ready to work hard.
- Most importantly, you’re genuinely a nice person.
About 55 Tech
What We Do
At 55 Tech, we’re building the data infrastructure for the sports and esports industries - two of the most dynamic and fast-evolving sectors in entertainment. Launched in late 2023, we’ve been growing at an incredible pace, and this is just the beginning. We are 13 people now at 55 Tech.
Our Vision
Our ambition is to empower organizations of all sizes to access, understand, and leverage sports data seamlessly - unlocking smarter decisions, greater efficiency, and new opportunities for innovation.
We focus on precision, speed, and reliability. In a world where milliseconds matter, our goal is to be the infrastructure layer that our partners can fully trust.