Senior Software Engineer

Senior Software Engineer — TypeScript Platform

Location: Fully remote · GMT to GMT+3

Team: Product Engineering

Type: Full-time · Individual contributor

Salary: €/£80,000–110,000 per year (flexible depending on location and experience)

About the company

The company is a privately-owned global workforce solutions company operating across 180+ countries. We help organisations hire, pay, manage, and remain compliant wherever their people are — spanning Employer of Record, multi-country payroll, HR services, global recruitment, and international expansion consulting.

The engineering problems we face are genuinely hard: multi-jurisdiction payroll rules, real-time compliance enforcement, HRIS integrations at scale, FX handling across dozens of currencies. The work matters. Your code affects how people get hired and paid across the world.

What this role can offer you

• High-ownership work from day one. A focused team, a serious roadmap, and the expectation that you influence technical direction — not just execute tickets.

• A modern, opinionated stack. TypeScript end-to-end, with Effect for the service layer. We take type safety and composability seriously. If you've been waiting for a production codebase that actually uses functional patterns, this is it.

• A technically interesting immediate focus. You'll be leading work on a large API-first platform revamp — a greenfield opportunity within a live product.

• AI is a first-class part of how we work. We use AI to extend engineering capacity, and we hire engineers who use it daily and use it well. Our hiring process even includes a live AI-assisted coding interview — we want to see how you think with these tools, not whether you can memorise algorithms without them.

• Competitive salary. €/£80,000–110,000 per year, flexible depending on location and experience. No degree required — experience is what matters.

The role

We're hiring a Senior Software Engineer to join the Product Engineering team. This is an individual contributor role — no people management. You'll design, architect, and ship. You'll influence technical direction, raise the bar through code review and mentorship, and own complex features end-to-end.

The immediate focus is a large API-first platform revamp. You'll have a say in how it's shaped.

What you'll work on

• Architect and deliver the API-first platform revamp — defining service boundaries, API contracts, and data models

• Drive technical design reviews and establish engineering best practices

• Own end-to-end delivery of complex features across payroll, compliance, and HR product surfaces

• Improve CI/CD pipelines (GitHub Actions, ArgoCD), testing strategies, and deployment processes

• Mentor engineers through code reviews and pair programming

• Contribute to the technical roadmap and product strategy

• Build and iterate on AI-assisted workflows as agentic tooling becomes part of how we ship

Our stack

• Language: TypeScript (functional style, frontend and backend)

• Frontend: React, Next.js

• Backend: Fastify, Drizzle, Effect

• Database: PostgreSQL, Redis

• Infrastructure: Kubernetes

• CI/CD: GitHub Actions, ArgoCD

• Observability: Grafana, Prometheus, Tempo, Loki

How we work

• 2-week sprints

• Fully remote, GMT to GMT+3

• Sync communication on Discord

• Small, senior-leaning team where your opinions shape how we build

Interview process

Four stages, no surprises

• Recruiter call — Get to know each other, clarify the process. If it's a mutual fit, you'll receive an interview guide to prepare.

• Hiring manager interview — Meet your potential leader, discuss your experience and approach.

• System design interview — We observe how you think architecturally. No trick questions — we want to see your reasoning.

• Coding with AI interview — You'll work in an environment with Claude Code. No prior Claude experience needed. We would like to see how you use AI as a thinking and delivery tool — not test your ability to code in a vacuum.

Requirements

Required

• Based between GMT and GMT+3

• 5+ years of experience at Senior level or above

• Expert-level TypeScript — large-scale production applications, not just familiarity

• Strong software architecture fundamentals — patterns, trade-offs, and the judgement to apply them

• Deep understanding of API design and best practices

• Production experience with PostgreSQL, Kubernetes, and Redis

• Experience in a mid-to-large engineering organisation (50+ developers)

• Active daily use of AI coding tools — this is a hard requirement, not a nice-to-have

Nice to have

• Experience with Effect-ts or similar functional libraries

• Fastify

• Next.js

• Grafana stack (Prometheus, Tempo, Loki)

• Domain experience in HR tech, payroll, compliance, or regulated industries