Senior Full Stack Engineer

8 hours ago

Belgrade, Central Serbia Friendly karijere Full time €40,000 - €70,000 per year

Friendly client empowers hoteliers to build smarter digital relationships through the industry's first data-native Marketing CRM. Their solution centralizes guest data from fragmented systems to build unified 360° profiles, enabling hotels to run hyper-personalized marketing campaigns, increase direct bookings, and drive guest loyalty — all through a platform purpose-built for the AI era.

Role Overview

  • Senior full stack engineer who pairs systems thinking with hands-on delivery; report to the CTO and partner closely with product, design, and data teams.
  • Own features from idea to production across data ingestion, backend services, web experience, and DevOps automation.
  • Raise the technical bar through architecture input, code review, tooling improvements, and mentoring peers.

What You'll Do

  • Shape product functionality with leadership, translating growth and retention goals into resilient technical and product roadmaps.
  • Build polished, accessible customer journeys to create a seamless user experience. Be able to lead the "front end" aspect of engineering at Familiar.
  • Design and ship backend services in our NestJS + Fastify API, including data pipelines feeding our unified hotel profile and marketing automation engine.
  • Safeguard quality through automated tests (Jest unit, Playwright e2e), observability, and iterative refactors that keep the monorepo healthy.

Tech Environment

  • TypeScript-first monorepo with pnpm, Node 20+, Turborepo orchestration, Biome linting/formatting, and GitHub Actions quality gates.
  • Frontend: 15, React 18, Storybook-driven component development, Playwright e2e coverage.
  • Backend: NestJS + Fastify, background jobs for property data ingestion, Jest coverage per package.
  • Infra & Data: Terraform-managed cloud footprint, interactive scripts for seeding realistic hotel data, emphasis on secure integrations (e.g., PMS providers like Mews).

What We're Looking For

  • 7+ years building product-focused web platforms with modern TypeScript/Node and React, ideally in data-rich or multi-tenant domains.
  • Proven experience shipping to production in a fast-paced startup: balancing speed, reliability, and thoughtful technical debt paydown.
  • Architectural instincts across API design, event/data pipelines, and front-end state management; comfortable with trade-offs in distributed systems.
  • Strong testing philosophy (unit, integration, e2e) and familiarity with CI/CD automation in monorepos.
  • Ability to mentor engineers, influence product direction with data, and communicate clearly with stakeholders across time zones.
  • Bonus: hospitality tech, marketing automation, or analytics platform experience; Terraform/AWS familiarity.

Employment type:
B2B contract, with a gross monthly rate of
€5,000–€7,000.
If you thrive on ownership, architecture, and building products that blend data and design we'd love to hear from you.

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