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Senior Back-End Engineer

🕒 yesterday
Node.jsJavaScript (es6+)TypeScriptNestjs
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📜 Description

  • Develop and maintain API-based backend services and applications.
  • Build services with JavaScript, TypeScript, Node.js, and NestJS.
  • Design and implement new product features within a microservices architecture.
  • Optimise applications for performance, scalability, and reliability.
  • Troubleshoot complex technical issues and contribute to code reviews and engineering best practices.
  • Collaborate with colleagues across an international engineering team.

🛠️ Requirements

  • Strong commercial experience with Node.js development.
  • Proficiency in JavaScript (ES6+) and/or TypeScript.
  • Experience working with NestJS.
  • Good understanding of RESTful APIs and backend service design.
  • Strong analytical and problem-solving skills.
  • Excellent communication and teamwork abilities.
  • Good written and spoken English.
  • Experience operating mature API products in production.
  • Exposure to high-load systems and scalable architectures.
  • Experience with Apache Pulsar, Aerospike or similar technologies.

✨ Benefits

  • Flexible working hours.
  • Up to 24 days of paid annual leave.
  • Food vouchers.
  • Additional health insurance.
  • Sports card and office perks.
  • Career development opportunities.
  • Team-building activities.
Full job description

Senior Back-End Engineer

Sofia, Bulgaria | Hybrid | Full-time

About

Global technology company providing B2B SaaS solutions for online sports platforms. The company develops sportsbook software and data-driven technology that enables betting operators to deliver reliable, high-performance sports betting experiences across international markets.

The Role

We are looking for a Senior Back-End Engineer to join our team in Sofia, contributing to the development and evolution of our sportsbook platform.

You'll work within a microservices-based architecture, building and maintaining API-driven services that support complex, high-performance applications. Working closely with other engineers, you'll contribute to new feature development, system optimisation and the continued improvement of our technical infrastructure.

Key Responsibilities

  • Develop and maintain API-based backend services and applications.
  • Build and enhance services using JavaScript, TypeScript, Node.js and NestJS.
  • Contribute to the design and implementation of new product features.
  • Work with a microservices architecture and technologies including MongoDB and Pulsar.
  • Optimise applications for performance, scalability and reliability.
  • Troubleshoot and resolve complex technical issues.
  • Write clean, maintainable code and contribute to code reviews and engineering best practices.
  • Collaborate with colleagues across an international engineering team.

What We're Looking For

  • Strong commercial experience with Node.js development.
  • Proficiency in JavaScript (ES6+) and/or TypeScript.
  • Experience working with NestJS.
  • Good understanding of RESTful APIs and backend service design.
  • Strong analytical and problem-solving skills.
  • Excellent communication and teamwork abilities.
  • Good written and spoken English.

Desirable Experience

  • Experience operating mature API products in production.
  • Exposure to high-load systems and scalable architectures.
  • Experience with Apache Pulsar, Aerospike or similar technologies.
  • A degree in Computer Science, Software Engineering, Mathematics or a related discipline.

Package:

  • An international and multicultural working environment.
  • Hybrid working in Sofia.
  • Flexible working hours.
  • Up to 24 days of paid annual leave.
  • Food vouchers and additional health insurance.
  • Sports card and office perks.
  • Career development opportunities and team-building activities.

Location: Sofia, Bulgaria | Working arrangement: Hybrid | Employment type: Full-time

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