Principal Software Engineer - API & Architecture Lead

Dex

United Kingdom

On-site

GBP 120,000 - 160,000

Full time

4 hours ago

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Job summary

Dex’s trusted partner company is building the definitive API for global tax automation. You will join a lean engineering team, co-owning the roadmap, driving architecture, and operating what you ship in production.

This principal-level role emphasizes setting the technical bar and shipping continuously across the product lifecycle. You’ll design, build, and operate mission-critical REST APIs with Node.js/TypeScript, Go, and ReactJS, owning products end-to-end and delivering value through

Qualifications

Fluency across the stack with hands-on experience in Node.js/TypeScript, Go, or ReactJS.
Proven track record scaling and operating large-scale microservices in high-growth environments.
Strong ownership: ensure code is tested, features delivered, production clean.
Builder mindset: ship fast, continuously, and iteratively using data to drive decisions.

Responsibilities

Design, build, and operate mission-critical REST APIs powering global tax compliance for enterprises.
Take full ownership of products from ideation through delivery, gaining deep customer insight.
Ship across the stack from backend logic to customer-facing interfaces.
Drive architectural decisions and tooling to ensure scalability and reliability in a high-growth setting.
Champion continuous delivery, shipping fast and iteratively while maintaining high quality.