Senior Backend Engineer (Payments focused)

Senior Backend Engineer (Payments focused)

Position Title: Senior Backend Engineer (Payments focused)
Department: Business & Product
Reports To: Technical Delivery Manager
Location: Remote / Europe
Date: ASAP
Projects & Initiatives: Multi-project

Node.js       NestJS       Stripe (Adyen, Checkout.com, PayPal)       PostgreSQL       Microservices

1. Job Purpose
We're a fast-growing tech company with a portfolio of SaaS products serving diverse
industries. Innovation, performance, and design precision are core to our values.
As we scale, we're looking for a Senior Back-End Engineer to take a key role in crafting
highly performant, maintainable, and user-focused web applications, with a strong focus on
payments infrastructure across multiple products.

2. Key Responsibilities
– Participate in daily team routines, stand-ups, sprint planning, and retrospectives.
– Actively contribute to sprint work: feature development, code reviews, and merge
requests.
– Develop testable, maintainable code; troubleshoot and debug issues as they arise.
– Gather and evaluate requirements in collaboration with the Tech Lead, Product
Manager, and fellow engineers.
– Translate requirements into solid backend features
– Integrate software components into a fully functional system
– Collaborate effectively with Product, Engineering, QA, and Customer Support
– Integrate with third-party APIs and monitor system performance
– Apply engineering best practices and agreed standards consistently
– Prepare and present technical ideas to internal teams and stakeholders

3. Requirements

MUST HAVE
– 5+ years of commercial experience with Node.js and RESTful APIs
– 1+ year of commercial experience with NestJS
– 1+ year integrating and maintaining Stripe
– 1+ year integrating and maintaining a payment orchestration platform, Primer, Gr4vy,
or Spreedly
– Proficient in English, written and spoken

ALSO REQUIRED
– Hands-on experience with the full payment lifecycle:
◦ Authorization, capture, refunds, webhooks, reconciliation
◦ Third-party API integrations
– Thorough understanding of web application and microservice architecture
– Comprehensive understanding of OOP, design patterns, and service-oriented
architecture
– Advanced PostgreSQL experience with ORM:
◦ Designing scalable schemas
◦ Performance optimization
◦ Schema and data migrations under heavy load
– Experience with unit and integration tests, e.g., Jest
– Experience with observability and monitoring in distributed environments, e.g.,
GroundCover
– Knowledge of application performance optimization techniques
– Understanding of web technologies
– Comfortable with Docker and Kubernetes
– Hands-on with modern AI development tools, e.g., GitHub Copilot, Cursor, ChatGPT,
or similar
– Strategic thinker with a problem-solver mindset
– Able to work autonomously in a fast-paced, agile, remote environment
– Strong communication skills and experience working with distributed teams

4. Nice to Have
– Experience with other payment processors, Adyen, Checkout.com, and PayPal
– Understanding of payment performance processes, EFWs, chargebacks, and refunds
– Experience with Redis
– Familiarity with CI/CD tools and practices
– Experience with AWS
– React.js / Next.js
– HTML / CSS
– Experience with SaaS products
– Past or current Tech Lead experience

5. What We Offer
– Full-time, long-term role
– 22 days paid leave + local bank holidays
– 100% remote
– Flexible hours, core window 7:00–18:00 EET
– High-traffic, global SaaS products, real scale, real impact