Senior Backend Developer (Node.js)

TL;DR

Senior Backend Developer (Node.js): Developing and maintaining in-house platforms and integrating third-party APIs with an accent on microservices architecture and high-load system performance. Focus on building new features from scratch, ensuring code quality through TDD, and optimizing database interactions using SQL and NoSQL technologies.

Location: Must be based in Sofia, Bulgaria (Office-based). Relocation assistance is provided.

Company

Sofia Stars is an operational services company providing R&D, Marketing, Customer Support, and Anti-Fraud solutions for online businesses.

What you will do

• Develop and maintain in-house platform components.
• Integrate various 3rd party APIs into existing systems.
• Actively participate in the full development lifecycle of new features from scratch.
• Collaborate on microservice architecture design and implementation.
• Ensure system reliability and performance for high-load environments.

Requirements

• 5+ years of commercial experience with Node.js and Nest.js.
• 5+ years of commercial experience in web development.
• Strong knowledge of JavaScript and ECMAScript 6 standards.
• Experience with high-load SQL or NoSQL databases (MongoDB, MySQL).
• Proficiency in REST, GraphQL, and WebSockets.
• Understanding of TDD principles and microservice architecture.
• English proficiency: Intermediate level or higher.

Nice to have

• Experience with CI/CD, Containers, and Kubernetes.
• Knowledge of TypeScript, Nats, and RabbitMQ.

Culture & Benefits

• Official employment with full medical insurance (including dental and maternity).
• Competitive salary and monthly food vouchers.
• Up to 25 days of paid leave plus 6 additional days of undocumented sick leave.
• Multisport card and regular team-building events.
• Office perks including breakfast, fruits, and snacks.
• Opportunities for professional growth in a dynamic international environment.