Full-Stack Engineer (Mid/Senior)

Tellet; Amsterdam; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

Tellet in Amsterdam is seeking a mid/senior Full-Stack Engineer to own features from concept to delivery, collaborating with the Product Designer and Product Lead to build solutions that address real user problems.

You will contribute to a modern stack (React, NextJS, TypeScript, Node.js/NestJS, Supabase) and participate in AI-enhanced development. The role is based in the Netherlands with hybrid office presence in Amsterdam.

Qualifications

• Solid full-stack experience with the stack used (React, NextJS, TS, Node.js/NestJS, Supabase).
• Strong product mindset and ownership of features end-to-end.
• Experience in startups or building pet projects from start to finish.
• Interest in AI technology and ability to leverage AI tools in development.
• Based in the Netherlands and able to work from Amsterdam office 2–3 days per week.

Responsibilities

• Product ownership: own features from inception to delivery with Design and Product Lead support.
• Tech support duty: investigate and resolve customer-reported issues weekly.

Skills

Full-stack

Product ownership

Startup experience

AI tools

Tools

React

NextJS

Typescript

Node.js

NestJS

Supabase

Job description

Full-Stack Engineer (Mid/Senior)

Dec 2, 2025

Full Stack Developer (Mid/Senior)

Amsterdam | Hybrid

We have build an virtual qualitative research interviewer. Seriously – it's done 500,000+ interviews in 57 languages for companies like Amazon, Heineken, and Ikea. We are now extending this research platform and need your help!

What you'll do

• Product ownership: You will own the features from the beginning till the end and work together with the Product Designer and Product Lead on building solutions that solve real problems. You will actively come up with ideas and solutions based on the users’ feedback and our bigger strategy goals.

• Tech support duty: Every week, one person from the engineering team is delegated a support duty. You will need to investigate and resolve issues reported by customers and internally (which is one of the best ways to understand our users too!)

What we are looking for

• You have a solid full-stack experience with the technologies we are using.

• You enjoy actively participating in product discussions, have a strong product mindset, and own features end-to-end as opposed to just pushing tickets that have been assigned to you (that was always kinda boring anyways).

• You've worked at a startup before and/or have built pet project(s) from start to finish.

• You're excited about AI technology and know how to leverage AI tools in your development process. Experience with AI/ML frameworks is valuable but not required.

• You are based in the Netherlands and are willing work from our Amsterdam office at least 2-3 days a week.

Our stack

React (NextJS), Typescript, Node.js (NestJS), Supabase

Why join us

The vibe: We're a small team moving fast. You'll ship real features that thousands of people use. No endless meetings, no corporate shenanigans – just build cutting edge features with the latest AI models and technologies. If you want responsibility over hand-holding, and you're curious about where AI x research is heading, please reach out. We are curious to get to know you!

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