Klient: A digital platform leading a new era of private equity investing

Profile: Senior NodeJS Developer

About the role: as a Senior Backend Engineer within our Engineering team, you will be instrumental in building, maintaining and evolving a modular monolith and all related components, structured around clear business domains.

• Take Ownership: Write high-quality, well-tested code that ensures the reliability and performance of our services, helping to streamline operations and improve efficiency across the organization  
• Lead Architectural Transformation and Migration: Lead the strategic migration from our complex legacy monolith and fragmented microservices to a modern, modular monolith. This involves tackling significant technical debt, designing Anti-Corruption Layers (ACLs) to ensure data consistency, and defining the future architectural boundaries of our core platform.  

Oferta:

• Lokalizacja: Warszawa / Berlin; praca 100% zdalna 
• Zatrudnienie: przez apreel na zasadach B2B 
• Stawka: do 185zł netto/ h 

Knowledge/Experience: 

• 8+ years of professional experience as a Backend Engineer, ideally having worked for a Financial Services company  
• Strong background in software architecture, with hands-on experience across service-oriented and distributed systems  
• Hands-on experience applying Domain-Driven Design (DDD) to model complex business domains  
• Fluency in Typescript and Relational Databases  
• Has experience with AWS and ideally Kubernetes  
• Has hands-on experience with GitHub Actions and CI/CD pipelines  
• Experience with logging, monitoring tools (e.g., Newrelic, Grafana), and debugging large systems  
• Is passionate about clean, well-tested code and takes full ownership of the SDLC, including deployment, production reliability, and monitoring  

Technical Skills: 

• Node.js (TypeScript)  
• Express.js  
• Next.js (App Router, Server Components, Route Handlers / API routes, Server Actions)  
• REST & GRPC API design and integration  
• Relational databases (MySQL) with ORMs (TypeORM)  
• Caching & performance optimization (e.g., Redis, CDN, ISR/SSR tuning)  
• Authentication & authorization (NextAuth/Auth.js, JWT, OAuth2, SSO)  
• Security best practices for fintech/PII (encryption, OWASP, rate limiting)  
• Background jobs & event-driven patterns (queues, webhooks)