Backend Developer

Requirements

• 5+ years of experience in backend development of financial systems (fintech, crypto, payment systems);

• Experience in designing and maintaining transactional systems (balances, settlements, funds accounting);

• Experience building scalable and fault-tolerant production services;

• Production experience developing services in TypeScript (Nest.js);

• Experience working with nodes, RPC/REST/GraphQL/gRPC APIs, and integrating with various networks;

• Strong knowledge of PostgreSQL, use of ORMs, and query optimization;

• Experience with testing: unit, functional, and end-to-end;

• Ability to conduct code reviews, plan tasks, and support team development;

• Experience organizing on-call rotations, incident management, and conducting post-mortems;

• Experience working with event-driven architectures (Kafka, RabbitMQ).

Key responsibilities

• Service Development and Maintenance: building and evolving APIs for merchants and wallets, fee calculation services, and balance and transaction management systems;

• Architecture: contributing to the design and evolution of the payment system architecture, ensuring scalability and fault tolerance of the solutions;

• Optimization: improving the performance and reliability of existing services, eliminating bottlenecks in transactional flows;

• Integrations: collaborating with other domains and external payment systems to ensure stable end-to-end process execution;

• Testing: implementing and maintaining unit, integration, and end-to-end tests; ensuring release quality;

• Databases: working with PostgreSQL, optimizing queries, designing schemas, and performing zero-downtime migrations;

• Observability: implementing and maintaining monitoring, metrics, and alerting; analyzing incidents and improving system stability;

• Incidents & Resilience: participating in on-call rotations, responding quickly to incidents, conducting post-mortems, and implementing corrective actions to prevent recurrences;

• Security: ensuring compliance with security standards when working with financial data; preventing incidents and data leaks;

• Code & Processes: participating in code reviews, documenting technical decisions, and following internal engineering standards and best practices.

Desirable

• Experience working with fintech or crypto products;

• Experience designing accounting systems;

• Knowledge of principles behind double-entry systems;

• Experience integrating with external payment providers or banks;

• Experience working with observability tools (Prometheus, Grafana);

• Knowledge of CI/CD best practices and release management.

What we offer

• High salary (plus performance bonuses and salary revision regularly);

• Remote work;

• Work schedule: Mon-Fri (8 hours per day) with flexible starting hours;

• 24 days holiday leave;

• Corporate English lessons;

• Exciting work challenges that allow you to grow to your full potential;

• A strong team of like-minded professionals who will be by your side to accomplish ambitious projects, stimulate your professional development and bring experience.