Senior Backend Engineer (Go, Python, Node.js)

O projekcie: 📍 Client: lead international bank | B2B contract 🗣️ Recruitment: phone screen with our recruiter + technical test + 2 on-line meetings with the hiring managers 🗺️ Hybrid work: 6 days per month from the office in Cracow Verita HR is an international company providing recruitment support within #Fintech, #Finance and #Banking market in EMEA. We connect the most innovative organizations with the best people in the market. We conduct systematic market research, which allows our Digital Teams to be a step ahead of the competition. You’ll join a Software Security platform focused on building internal products and services deployed at scale. The team is moving away from vendor-based solutions toward open-source, cloud-native architecture, with strong emphasis on automation, engineering discipline, and long-term maintainability. You’ll work in a hands-on engineering role, contributing to backend services that improve security, reliability, and developer productivity across multiple agile teams. The environment values ownership, pragmatic architecture decisions, and continuous improvement of engineering standards. What's in it for you? - Prestigious position at one of the world's largest banks - Stable, long-term projects - Hybrid work (6 days per month from the office in Cracow) and flexible working hours - Working with modern IT technologies - Growth and development opportunities with the possibility to move between projects - Private healthcare and multisport card - Referral program, free parking and company events Wymagania: - Strong commercial experience with Go, Python and Node.js, building production-grade backend services - Experience designing scalable backend systems and distributed architectures - Hands-on experience with Terraform and Infrastructure as Code practices - Understanding of event-driven architecture and asynchronous communication patterns - Experience with PostgreSQL performance tuning in high-concurrency environments - Knowledge of OAuth2 and OpenID Connect authentication mechanisms - Solid understanding of software architecture, SDLC and modern engineering practices - Ability to take ownership of services and operate them in production - Strong problem-solving skills and ownership mindset Nice to have: - Experience with GCP services such as GKE, Cloud Run or Filestore - Exposure to Zero Trust security models - Experience building security-focused platforms or internal developer tooling - Contributions to open-source or public GitHub portfolio - Experience mentoring engineers and driving engineering standards Codzienne zadania: - Design, build and maintain scalable backend services using Go, Python and Node.js - Contribute to architecture decisions for distributed and event-driven systems - Own the lifecycle of services, ensuring reliability, observability and operational stability - Implement authentication and authorization mechanisms based on OAuth2 and OpenID Connect - Optimize PostgreSQL performance in high-concurrency environments - Translate business and security requirements into practical technical solutions - Drive automation and reduce manual operational effort using Infrastructure as Code - Collaborate with cross-functional teams to deliver secure and maintainable solutions - Mentor engineers and share knowledge to improve engineering practices across teams - Challenge existing solutions and propose improvements to architecture and delivery