[GBL] Senior Backend Engineer (TypeScript)

Job Description

Project – the aim you’ll have

Join an innovative digital platform, building scalable, high-performance backend systems. You'll be part of a collaborative, cross-functional team focused on creating a solid, well-governed data foundation and backend architecture. Working with modern TypeScript technologies and event-driven systems, you'll help deliver trusted, scalable solutions that power personalized member experiences. The client is a leading UK-based organization investing in next-generation technology to transform its digital ecosystem.

Position – how you’ll contribute

• Design and develop high-load backend services using TypeScript, Bun.js, and Nest.js.
• Build and maintain a robust, scalable data architecture, ensuring proper data storage, structure, and documentation.
• Integrate backend services using gRPC and manage inter-service communication via protobuf contracts.
• Implement event-driven solutions with message brokers such as Nats.io, Kafka, or SQS.
• Work with analytical (ClickHouse) and transactional (PostgreSQL) databases to optimize queries and ensure data reliability.
• Integrate with third-party systems including Auth0, Stripe, Sanity CMS, HubSpot, Algolia, and external APIs (e.g., Google Places).
• Ensure strong data governance: define data structures, storage strategies, and maintain comprehensive documentation.

Qualifications

Expectations – the experience you need

• Proven commercial experience in backend development with TypeScript and Node.js.
• Hands-on experience with Nest.js or similar backend frameworks.
• Solid understanding of microservices architecture and distributed systems.
• Experience with PostgreSQL: indexes, transactions, and query optimization.
• Practical experience with message brokers, preferably Kafka.
• Familiarity with gRPC and building APIs for inter-service communication.
• Understanding of event-driven architecture principles.
• Ability to write clean, maintainable, and type-safe code with a focus on scalability.

Additional skills – the edge you have

• Experience with Bun.js in production or personal projects.
• Hands-on experience with ClickHouse for analytical workloads.
• Experience building high-load systems and real-time or near-real-time data pipelines.
• Familiarity with observability tools: logs, metrics, and distributed tracing.
• Understanding of DDD, CQRS, and Clean Architecture patterns.

Additional Information

Our offer – professional development, personal growth:

• Flexible employment and remote work  
• International projects with leading global clients 
• International business trips  
• Non-corporate atmosphere 
• Language classes 
• Internal & external training 
• Private healthcare and insurance  
• Multisport card 
• Well-being initiatives 

Position at: Software Mind Poland