CapitalFlow GmbH
Full Stack Engineer (m/f/d) TypeScript/Node.js | Fintech Start-up Stuttgart
Stuttgart, Germany
Employee
Software Development
€60,000 to €85,000 / year
We are redefining how financial consulting works in Germany.
The insurance and finance sector is one of the country’s largest industries—and technologically, it’s stuck in 2005. Broken processes, cobbled-together tools, zero scalability.
CapitalFlow is the platform that advisors use live during client meetings—a seamless system from data collection to the final report. Not a concept. A product in daily use.
Over 800 paying users. 400% growth last year. 100% bootstrapped. And we’re just getting started.
Responsibilities
You’ll work directly with the CTO—not as a ticket processor, but as someone who independently implements features end-to-end. From conception to production deployment.
What this means in practice: You’ll take responsibility for entire feature areas, contribute to architectural decisions, and see what you’ve built in real customer conversations the very next day
Qualifications
* At least 4 years of experience as a full-stack developer in the Node.js ecosystem
* Solid knowledge of TypeScript
* Experience with PostgreSQL
* Next.js and/or NestJS – ideally both, but at least one is required
* You can independently implement features end-to-end – from conception to production deployment
* Basic knowledge of AWS
Bonus: Experience with monorepos (Turborepo), testing with Jest and/or Playwright
You don’t need financial knowledge. You need the drive to build a complex product that’s transforming an entire industry.
Benefits
Real product, real users. What you build will be used by people the very next day in real customer interactions. No feature graveyard.
Ownership. Small team, short lines of communication, big impact. No five layers of hierarchy between you and a decision.
Growth. 400% last year—and that’s just the beginning. Those who take on responsibility early grow with the company. Including the opportunity for equity.
Office. A historic city villa near Hölderlinplatz in Stuttgart. Hybrid—but an office where you’ll love to be.
Equipment. MacBook, everything you need.
Team. Joint events, trips, a team that builds together and celebrates together.
Our process is short and straightforward
* Getting to know each other – a brief conversation to see if we’re on the same page
* Technical interview – architecture and code
* Trial day at the Stuttgart office – work together, get to know the team
* Offer & Start
If you’re ready to work on a product that’s actually used – apply now.
CapitalFlow GmbH
1–10 employees
Software development
CapitalFlow is the consulting system for financial advisors. Not just another tool—it’s an end-to-end process that supports advisors live during client meetings: from digital data capture and cash flow and needs analysis to the final financial report.
Over 800 paying users utilize CapitalFlow daily in real-life consulting sessions. The system runs under the advisor’s own branding, integrates with existing CRM and administrative tools, and replaces the typical patchwork of Excel, PDFs, and standalone solutions with a single, structured workflow.
400% growth last year. 100% bootstrapped. Built in Stuttgart.
Website
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Contact Person
MA
Mark Aganin
Recruiting Team