Trendies
Freelance Senior Fullstack Developer (React/TypeScript/Next.js/Prisma/NestJS) – Berlin Only
TrendiesGermany3 days ago
Part-timeRemote FriendlyEngineering, Information Technology

Type: Freelance contract

Location: Berlin (Hybrid)

Start: ASAP (Otober 2025)

Duration: Estimated 30/40 hours over 2 weeks


About the Project

Trendies is a secure, high-end resale marketplace entering its final sprint before soft launch. We are looking for a reliable, senior full-stack developer based in Berlin to finalize our MVP and help prepare the platform for public testing. This is a short-term but critical mission: your work will directly impact the soft launch.


Responsibilities

  • Audit and finalize existing code (Next.js, Nest.js, Prisma)
  • Implement and fix real-time logic (chat, notifications, product status)
  • Connect frontend UI with backend endpoints
  • Support QA, testing, and basic bug fixes
  • Collaborate with the founder



Tech Stack

  • Frontend: Next.js, TypeScript, Tailwind CSS, Mantine
  • Backend: Nest.js, Prisma, PostgreSQL
  • Other: React, WebSocket logic, email via Brevo, 3rd-party API integrations
  • Bonus: React Native



Requirements

  • 5+ years of full-stack development experience (React)
  • Proven skills in both frontend and backend (Typescript/ Next.js + Nest.js)
  • Already based in Berlin — this is non-negotiable
  • Available to start immediately
    • Comfo
  • rtable working independently with a clear scopeAble
  • to deliver clean, reliable code under a deadlineReact
  • Native is a plus



    • Contract Details

    • Fixed-scope freelance mission (~30–40 hours total)
    • €20/hour
    • Timeline: October 2025 (flexible hours but must deliver within 2 weeks)
    • Possibility of future collaboration if the fit is strong



    How to Apply:

    Email [email protected] with the subject “Senior Dev Application – Berlin” and include:

    • Your GitHub or portfolio + 1–2 examples of full-stack projects you’ve built
    • Your availability + Confirmation that you are based in Berlin



    Hiring Process (4 Steps)

    We value your time and move fast, but we also need to ensure quality and reliability. Here’s how our process works:

    • Screening Call (15–20 minutes):

    Quick intro to assess background, motivation, and availability.

    • Technical Assignment (real module from our platform):

    A substantial and realistic task based on a real feature from our MVP. It reflects the actual work expected and may require up to 2–3 full days of effort.

    • Feedback Session:

    Live code review and technical Q&A to go through your logic, decisions, and approach (pair programming optional).

    • Final Interview:

    Offer discussion, timeline alignment, and next steps for onboarding.

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