(Senior) Full-Stack Developer / Software Engineer (f/m/x)

Are you a versatile developer ready to build something extraordinary? Join us as our software engineer and spearhead the creation of a cutting-edge platform.

Pactos is a venture-backed B2B SaaS start-up based in Munich. We’re revolutionizing the external workforce management with an AI-powered operating system. Used by leading corporates, Pactos help streamline the source-to-pay process with staffing providers in a compliant, scalable, and transparent way. Thus, our customers excel in operation efficiency and re-gain full workforce visibility.

• 💻 Architect our Application: Design, develop, and optimize modern web applications with a focus on the backend.


• 💪 End-to-End Ownership: Manage the complete development lifecycle - from requirements analysis to testing and deployment.


• 🗣 Cross-Functional Collaboration: Work closely with design, product, and other engineering teams to continually refine the system architecture.


• 📈 System Optimization & Scaling: Establish best practices to ensure code quality and maintainability.


• 🗿 Technical Leadership: Contribute to technical decisions, perform code reviews, and mentor junior developers to foster a culture of innovation, knowledge sharing and excellence.

• 3+ years of professional experience in full-stack / backend development


• Demonstrated ability to build scalable, high-performance web applications and implement effective optimization strategies


• Proficiency in modern backend frameworks (e.g., Nest.js) and the integration of RESTful APIs


• Familiarity with relational and non-relational databases (e.g., PostgreSQL, MongoDB)


• Excellent analytical and troubleshooting abilities with a passion for clean, maintainable code, as well as experience in agile development methodologies


• Strong interpersonal skills with a proven track record of cross-functional collaboration and glue work


• Highly motivated and proactive, eager to take ownership of the full domain and follow through in a fast-paced, aspiring startup environment


• Fluency in English

• Attractive comp + ESOP: Competitive salary plus meaningful equity


• True Ownership: You’ll be among the first, well-experienced developers. Everything is yours to shape. Define our product from day one.


• Speed: We make decisions in hours, not weeks. No politics. No BS.


• Colleagues you’ll want to work with: Pragmatic, product-obsessed, and committed to winning - we're a tight-knit, ambitious team with a builder mindset


• Modern stack, flexible setup: hybrid either in Munich or Berlin, outcome-driven, and lots of fun (e.g., Oktoberfest)

Tell us why this role is exciting for you and link some work references you're proud of. Let’s build something bold!