Fullstack Software Engineer (FE leaning)

100 000 - 150 000 USDNet per year - B2B
JavaScript

Fullstack Software Engineer (FE leaning)

JavaScript
On-site, Warszawa

TechTree

Full-time
B2B
Senior
Office
100 000 - 150 000 USD
Net per year - B2B

Job description

ABOUT THE ROLE

We're looking for an expert software engineer with an exceptional eye for UI/UX to join a small, high-trust engineering team. You'll own features end-to-end — from pixel-perfect frontend work to shipping backend functionality when needed.

This is not a siloed role. You'll move fast, make real decisions, and have direct impact on a product used by people who care deeply about learning and research. We don't have managers. We have engineers who own their work.

TECH STACK

The stack is heavily TypeScript. On the frontend: SvelteKit, Tailwind, DaisyUI, and Playwright, with DDD and CQRS patterns. On the backend: Node.js, Fastify, PostgreSQL, and queues. ML components are in Python. The stack is pragmatic, not dogmatic — tools may shift as the product evolves.

WHAT WE LOOK FOR

Elite communication

You set accurate expectations and live up to them. No surprises, no ambiguity about status or blockers.

Deep resilience

Bugs, crises, tough reviews — you have a large buffer before stress impacts your output. You don't crack under pressure.

No ego

We're here to build something great, not to manage insecurities. The best idea wins, regardless of who had it.

Product mastery

You understand the engineering principles behind the best software ever made — and care deeply about the difference between good and great.

Independent and obsessive by nature

You go deep on everything you touch. You're a lifelong learner who can't help but care about quality. Being an ex-founder is a bonus.

ENGINEERING CULTURE

Optional code reviews

We trust you. Merge when you're ready. Ask for a second pair of eyes when you want one.

Radical autonomy

We don't second-guess your decisions. You own the call.

High-bandwidth collaboration

Constant communication means everyone has context without formal gates or status meetings.

Direct feedback

Code reviews are blunt, concise, and respectful. We say what we mean.

Ruthless efficiency

We aggressively adopt any tool — AI included — that increases speed and leverage.

Limited frontend test coverage

Supplemented by strong architecture and top talent, not bureaucratic QA processes.

RECRUITMENT PROCESS

  1. Recruiter screening — a short intro call to align on basics.

  2. 1-on-1 with the engineering lead — a conversation about how you think and work.

  3. Technical challenge (~4 hours) — use AI, Google, or any resource you need. We care about the result, not the method.

  4. One-month paid contract — with the possibility to extend indefinitely. Honest, frequent feedback throughout so you always know where you stand.

COMPENSATION & BENEFITS

Salary

$100,000 – $150,000 depending on experience.

Equity and profit share

Core team members receive both equity and profit share as part of the compensation package.

Unlimited PTO

Use your own judgement — we won't count days.

Steep learning curve

You'll grow faster here than almost anywhere else — by design, not accident.

Real ownership

No managers capping your authority. You own your work end-to-end, with the full trust of the team behind you.

Tech stack

    English

    C1

    tailwind

    advanced

    React

    advanced

    DaisyUI

    advanced

    NextJS

    advanced

    TypeScript

    advanced

Office location

Fullstack Software Engineer (FE leaning)

100 000 - 150 000 USDNet per year - B2B
Summary of the offer

Fullstack Software Engineer (FE leaning)

On-site, Warszawa
TechTree
100 000 - 150 000 USDNet per year - B2B
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