Founding Engineer – Build the Next-Gen FinTech Platform

0to9; Wrocław; On-site; PLN 180,000 - 300,000; Full time

Job summary

0TO9 is building a new banking venture in a stealth-like setup. You will contribute to a greenfield, on-site Wrocław engineering effort focusing on .NET backend and TypeScript frontend. The role emphasizes pragmatic, scalable architectures, security-first thinking, and rapid product iteration.

You will work in a small, autonomous team delivering prototypes quickly, shaping the platform as the first engineers to establish architecture, tooling, and best practices for a fintech product.

Qualifications

• Experience with building full-stack applications using .NET and TypeScript.
• Proficiency in designing scalable backend services and efficient frontends.
• Familiarity with cloud infrastructure and secure, observable deployments.

Responsibilities

• Prototype and ship working software with quick feedback from real users.
• Collaborate closely with product and business to shape technical decisions.
• Maintain clean, well-tested code with CI/CD pipelines and automated reviews.
• Ensure security, observability, and compliance across services.

Skills

Backend development

Frontend development

TypeScript

.NET

SQL

AWS

Docker

CI/CD

Security

Observability

Microservices

Testing

Tools

GitHub Actions

Datadog

CloudWatch

Secrets Manager

Job description

0TO9 is building a new banking venture in a stealth-like setup. You will contribute to a greenfield, on-site Wrocław engineering effort focusing on .NET backend and TypeScript frontend. The role emphasizes pragmatic, scalable architectures, security-first thinking, and rapid product iteration.

You will work in a small, autonomous team delivering prototypes quickly, shaping the platform as the first engineers to establish architecture, tooling, and best practices for a fintech product.