Senior Full Stack Developer

About Fintech 42 GmbH

Fintech 42 GmbH is a financial technology company building a comprehensive platform for digital financial services. Our platform enables blockchain-based

tokenization and investor services with compliance-focused KYC/AML processes. We integrate with leading financial service providers to deliver secure, scalable

solutions for modern finance.

Role Overview

We are seeking experienced Senior Full Stack Developers to join our engineering team. You will work on a sophisticated financial technology platform built with

modern web technologies, contributing to both frontend and backend development. This role offers the opportunity to work with cutting-edge technologies including

blockchain integration, cloud infrastructure, and enterprise-grade financial systems.

Key Responsibilities

Design, develop, and maintain full-stack features across our platform ecosystem

Build scalable backend services using NestJS with clean architecture principles

Develop responsive and performant frontend applications using and React

Work with PostgreSQL databases and Prisma ORM for data modeling and persistence

Collaborate with cross-functional teams to deliver high-quality software solutions

Write clean, maintainable, and well-tested code with comprehensive test coverage

Participate in code reviews and contribute to technical architecture decisions

Optimize application performance and ensure security best practices

Debug and resolve complex technical issues across the stack

Contribute to API design and implementation following RESTful principles

Technical Stack

Backend

Framework: NestJS )

Database: PostgreSQL

ORM: Prisma

Testing: Jest, Supertest

Frontend

Framework:

Language: TypeScript

Styling: TailwindCSS

Infrastructure & DevOps

Cloud Platform: AWS (S3, etc.)

Build System: Nx Monorepo

Containerization: Docker

Version Control: Git

Required Qualifications

7+ years of professional software development experience

Strong expertise in TypeScript and modern JavaScript (ES6+)

Proven experience building production applications with React and

Deep understanding of RESTful API design and implementation

Strong knowledge of relational databases and SQL

Experience with modern frontend frameworks , React)

Experience with backend frameworks (NestJS, Express, or similar)

Solid understanding of software design patterns and clean architecture

Experience with Git version control and collaborative development workflows

Strong problem-solving skills and attention to detail

Excellent communication skills and ability to work in a team environment

Experience with testing frameworks and writing comprehensive tests

Understanding of security best practices for web applications

Fluent in English

Nice to Have

Experience with blockchain technologies and smart contracts

Background in financial technology or regulated industries

Experience with monorepo architectures (Nx, Turborepo, etc.)

Knowledge of DevOps practices and CI/CD pipelines

Experience with cloud platforms (AWS, Azure, GCP)

Familiarity with microservices architecture

Knowledge of compliance requirements (KYC/AML)

Contributions to open-source projects

German language skills

What We Offer

Opportunity to work on innovative financial technology solutions

Collaborative and professional work environment

Hybrid work arrangement with flexible scheduling

Modern technology stack and best practices

Continuous learning and professional development opportunities

Challenging technical problems in the fintech domain

Direct impact on product development and architecture decisions

Application Process

Please submit your application including:

Current CV/Resume

Cover letter highlighting relevant experience

Links to GitHub profile or portfolio (if available)

Any relevant certifications or projects

We are looking to fill multiple positions and welcome applications from qualified candidates at various experience levels within the senior range.

Fintech 42 GmbH is committed to creating a diverse and inclusive workplace. We welcome applications from all qualified candidates regardless of background.

Please send your application to

Art der Stelle: Vollzeit

Gehalt: 60 000,00€ ,00€ pro Jahr

Leistungen:

• Erfolgsbeteiligung

Arbeitsort: Vor Ort