Node.js Sr. Backend Engineer

Overview

Talcom Amsterdam, North Holland, Netherlands. Firsty is building the future of digital connectivity. In their first year, they raised over five million euros. The company is not even two years old and is already moving at high speed. The founders previously worked at Adyen and are now building the Adyen of telecom.

They work in a complex technical environment. Writing code is not enough. You need to understand how your work fits into the broader system, communicate clearly with engineers, and align with existing architecture. Technical depth is important, but so are quick thinking, structured reasoning, and genuine interest in the product. This role is for someone who works well in a team, communicates with focus and clarity, and does not need to be told what the product is about because they have already taken the time to look into it.

You will work closely with the CTO and the founding engineering team. Firsty offers a SARS plan (Stock Appreciation Rights) which allows you to benefit from company value growth without buying shares or paying tax at the time of grant.

What you will do

Build and maintain backend services in Node.js using TypeScript and Express

Work on a scalable serverless architecture on AWS

Replace Firebase with a custom backend stack

Build secure and reliable APIs

Set up observability: logging, monitoring, and alerts

Work closely with mobile and product teams

Build with awareness of product and user impact

Tech stack

Node.js, TypeScript, AWS (Lambda, API Gateway, DynamoDB, S3), PostgreSQL, GraphQL, Docker, Firebase, Adyen, GitHub Actions, Datadog, Sentry

What they are looking for

At least five years of backend development experience

Strong hands-on knowledge of Node.js and AWS

Clear and fast communication with engineers and stakeholders

Ability to translate product needs into backend architecture

Experience contributing to existing systems and codebases

Curiosity about the product and how people use it

Full-time availability on-site in Amsterdam

What they offer

Up to ninety thousand euros per year

SARS plan – share in the value you help create

Daily lunch at the office and dinner if you work late

Office-based role – no hybrid, no remote

Full relocation support for moving and settling in the Netherlands (possible from Europe or Turkey only)

Would you be ready to step in? Let us know. Firsty is growing fast and they are looking for people who can match that pace – not only technically, but also in communication and product involvement. If you want to build with speed, clarity, and ownership, we would like to hear from you.

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