Backend Developer (Node.js / NestJS)

Backend Developer (Node.js / NestJS)

Work format: On-site

Location: Prague, Czech Republic

About the Company

We are building a high-load iGaming product and are looking for a Backend Developer to join our engineering team. You will work on payment infrastructure, develop new services, and contribute to the evolution of our scalable backend architecture.

Responsibilities:

• Develop and maintain microservices using Node.js and NestJS.

• Integrate external payment providers and game aggregators.

• Maintain and enhance existing payment modules.

• Develop new product features, including bonus systems, categories, and other platform functionality.

• Design database schemas, indexes, migrations, and optimize queries.

• Work with infrastructure technologies such as Docker, Kubernetes, and AWS.

• Participate in architecture design and technical decision-making.

• Collaborate closely with Backend, QA, and Product teams.

• Take part in code reviews, testing, and mentoring.

Requirements:

• On-site work in Prague.

• 3–6 years of commercial Backend development experience.

• Strong knowledge of JavaScript and TypeScript.

• Solid experience with Node.js.

• Strong knowledge of NestJS.

• Experience with microservice architecture.

• Experience working with SQL and NoSQL databases.

• Strong knowledge of PostgreSQL and MongoDB.

• Experience with Docker and Kubernetes.

• Experience with AWS (EKS, S3, IAM).

• Experience with RabbitMQ.

• Ability to write clean, maintainable, and reliable code.

• Understanding of scalable backend architecture and best practices.

• English level: B2 or higher.

Nice to Have:

• Experience with Express.js.

• Knowledge of Go (we have existing Go microservices).

• Experience with Redis.

• Experience with ClickHouse.

• Experience writing Unit and Integration tests.

• Experience with payment systems.

Technology Stack:

• Languages: JavaScript, TypeScript.

• Frameworks: Node.js, NestJS, Express.js.

• Architecture: Microservices.

• Infrastructure: AWS (EKS, S3, IAM), Docker, Kubernetes.

• Databases: PostgreSQL, MongoDB, Redis, ClickHouse.

• Messaging: RabbitMQ.

• Tools: Git.

What We Offer:

• Work on an international high-load product.

• Opportunity to influence architecture and technical decisions.

• Modern technology stack.

• Strong engineering team.

• Professional growth and career development opportunities.

• Competitive compensation.