Informacje o stanowisku

technologies-expected :

• TypeScript
• PostgreSQL

• Our Tech Stack
• Backend: TypeScript, NestJS
• Database: PostgreSQL, TypeORM
• Messaging: RabbitMQ
• Testing: Jest, Supertest
• Infrastructure: Docker, docker-compose
• Observability: Winston, config-driven environments
• How We Work
• Pragmatic engineering with strong standards for correctness and reliability.
• Code reviews, CI pipelines, and incremental delivery.
• Full ownership: from feature design to production support.
• Why Join Us
• At Fiinu, you’ll work in a banking environment where correctness, performance, and resilience matter. You’ll have the opportunity to shape critical systems from the ground up, solve meaningful problems, and build products that scale.
• Apply
• Apply now if you’re passionate about building backend systems that stay reliable, fast, and correct as complexity grows.

• About Us
• Fiinu P.S.A. is part of the UK-listed Fiinu PLC banking group. We are building the future of fintech within a regulated banking environment—combining innovation, scale, and responsibility.
Our mission is to deliver platforms that:
- Enable clients to exchange currencies with confidence.
- Empower dealers with robust transaction-tracking tools.
- Provide leadership with a centralized data cube for real-time insights.
If you’re motivated by impact and want to work at the intersection of finance and cutting-edge technology, this role is for you.
• The Role
• We are seeking a Senior Backend Engineer to take ownership of our NestJS services, powering complex financial workflows at scale. You will design reliable APIs, build resilient services, and ensure data accuracy across a large TypeScript monorepo.
• Responsibilities
• Design, implement, and maintain backend services and REST APIs (NestJS/TypeScript).
• Model relational database schemas, write migrations, and optimize queries (PostgreSQL).
• Develop domain modules (e.g., trades, settlements, margin, orders) with clean abstractions.
• Implement background jobs, message-driven workflows, and third-party integrations (RabbitMQ, APIs).
• Maintain code quality through strong typing, unit/integration testing (Jest), and peer reviews.
• Enhance reliability and performance with observability, logging, tracing, and runtime optimization.
• Deliver secure code (authentication, authorization, validation, sanitization, least-privilege).
• Contribute to CI/CD pipelines, containerization, and operational excellence (Docker).
• Collaborate closely with product and data teams to deliver features end-to-end.
• Requirements
• 4+ years of experience building production backends in Node.js with TypeScript.
• 2+ years hands-on with NestJS (modules, providers, DI, interceptors, pipes, guards, filters).
• Strong SQL fundamentals and PostgreSQL experience (migrations with TypeORM or similar).
• Experience with messaging/queues and event-driven patterns (ideally RabbitMQ).
• Solid testing background (Jest, integration tests with real services/DBs).
• Proficiency with Docker-based dev environments and multi-env configurations.
• Comfortable working with large codebases, with a focus on clarity and maintainability.
• Security-first mindset (JWT/OAuth, secrets management, PII handling).
• Strong communication and documentation skills.
• Nice to Have
• Experience in fintech, accounting flows, or other high-integrity data systems.
• Observability stack knowledge (Winston, OpenTelemetry, metrics/tracing).
• Background in large-scale data pipelines and migrations.
• Familiarity with domain-driven design and modular monoliths.
• Exposure to Firebase, Plaid, or email templating systems.
• AWS/GCP and Infrastructure-as-Code experience.
• Ability to maintain Retool frontend app
• Our Tech Stack
• Backend: TypeScript, NestJS
• Database: PostgreSQL, TypeORM
• Messaging: RabbitMQ
• Testing: Jest, Supertest
• Infrastructure: Docker, docker-compose
• Observability: Winston, config-driven environments
• How We Work
• Pragmatic engineering with strong standards for correctness and reliability.
• Code reviews, CI pipelines, and incremental delivery.
• Full ownership: from feature design to production support.
• Why Join Us
• At Fiinu, you’ll work in a banking environment where correctness, performance, and resilience matter. You’ll have the opportunity to shape critical systems from the ground up, solve meaningful problems, and build products that scale.
• Apply
• Apply now if you’re passionate about building backend systems that stay reliable, fast, and correct as complexity grows.

• The Role:
• We are seeking a Senior Backend Engineer to take ownership of our NestJS services, powering complex financial workflows at scale. You will design reliable APIs, build resilient services, and ensure data accuracy across a large TypeScript monorepo.
• Responsibilities
• Design, implement, and maintain backend services and REST APIs (NestJS/TypeScript).
• Model relational database schemas, write migrations, and optimize queries (PostgreSQL).
• Develop domain modules (e.g., trades, settlements, margin, orders) with clean abstractions.
• Implement background jobs, message-driven workflows, and third-party integrations (RabbitMQ, APIs).
• Maintain code quality through strong typing, unit/integration testing (Jest), and peer reviews.
• Enhance reliability and performance with observability, logging, tracing, and runtime optimization.
• Deliver secure code (authentication, authorization, validation, sanitization, least-privilege).
• Contribute to CI/CD pipelines, containerization, and operational excellence (Docker).
• Collaborate closely with product and data teams to deliver features end-to-end.
• Requirements:
• 4+ years of experience building production backends in Node.js with TypeScript.
• 2+ years hands-on with NestJS (modules, providers, DI, interceptors, pipes, guards, filters).
• Strong SQL fundamentals and PostgreSQL experience (migrations with TypeORM or similar).
• Experience with messaging/queues and event-driven patterns (ideally RabbitMQ).
• Solid testing background (Jest, integration tests with real services/DBs).
• Proficiency with Docker-based dev environments and multi-env configurations.
• Comfortable working with large codebases, with a focus on clarity and maintainability.
• Security-first mindset (JWT/OAuth, secrets management, PII handling).
• Strong communication and documentation skills.
• Nice to Have
• Experience in fintech, accounting flows, or other high-integrity data systems.
• Observability stack knowledge (Winston, OpenTelemetry, metrics/tracing).
• Background in large-scale data pipelines and migrations.
• Familiarity with domain-driven design and modular monoliths.
• Exposure to Firebase, Plaid, or email templating systems.
• AWS/GCP and Infrastructure-as-Code experience.
• Ability to maintain Retool frontend app
• Our Tech Stack
• Backend: TypeScript, NestJS
• Database: PostgreSQL, TypeORM
• Messaging: RabbitMQ
• Testing: Jest, Supertest
• Infrastructure: Docker, docker-compose
• Observability: Winston, config-driven environments
• How We Work
• Pragmatic engineering with strong standards for correctness and reliability.
• Code reviews, CI pipelines, and incremental delivery.
• Full ownership: from feature design to production support.
• Why Join Us
• At Fiinu, you’ll work in a banking environment where correctness, performance, and resilience matter. You’ll have the opportunity to shape critical systems from the ground up, solve meaningful problems, and build products that scale.
• Apply
• Apply now if you’re passionate about building backend systems that stay reliable, fast, and correct as complexity grows.

• Hybrid Work
• International Team
• Employee Share Option Programme

Warszawa - Oferty pracy w okolicznych lokalizacjach