Empower businesses to succeed! Sastrify is building the future of software management. Our AI-powered platform helps IT, Procurement, and Finance teams discover, acquire, and optimize their software landscape. Founded in Cologne in 2020, we’ve raised €57M+ from top-tier investors (FirstMark, Endeit, HV Capital) and serve 50,000+ users. Join our team of Sastronauts!

We’re looking for a Tech Lead who acts as the primary technical counterpart to our Head of Product & Engineering. This is a high-impact, non-managerial, 70%+ hands-on coding role designed for a seasoned engineer who loves the craft of building as much as the “why” of product development. You’ll report directly to the CTO and bridge the gap between product discovery and technical execution.

As we scale, you’ll have the opportunity to build and lead a small team of engineers who will report to you.
Ready to shape the future of SaaS management? Let’s do it together! You'll be working with Max Messing, CTO and Lars Klein, Head of Product.

What you’ll do as our Tech Lead (m/f/d)

• Hands-on Execution: Lead by example by writing high-quality, production-ready code across the entire stack (React/Node.js). You’ll tackle the most complex technical challenges and set the quality bar for the team.
• AI-Native Development: Pioneer AI-augmented development workflows for the entire team. We don’t just want someone who “uses Copilot” — we want someone who can architect AI features (LLMs, agents, automation) into our platform AND use AI tools to fundamentally change how our team ships code. You should have opinions on when to prompt-engineer vs. fine-tune, how to evaluate LLM output quality, and how to build reliable AI pipelines in production.
• Product Partnership: Collaborate daily with the Head of Product & Engineering to translate the product vision into a robust technical roadmap. You’ll be the “voice of engineering” in product discovery.
• Technical Evolution: Define and evolve our full-stack architecture. We’re pragmatic about our infrastructure — the right tool for the right problem, not dogmatic about any specific cloud pattern.
• Technical Feasibility: Evaluate new feature requests for technical risk and effort, providing high-level estimates and alternative technical paths to achieve business goals.
• DevOps Culture: Advocate for and implement best practices in IaC and CI/CD, ensuring our deployment cycles remain fast and reliable.
• Mentorship & Quality: Drive technical excellence through deep code reviews, pair programming, and setting the standard for documentation and testing.

Our Tech Stack

• Front-End: TypeScript, React.js, React Query, Storybook
• Back-End: Node.js, TypeScript, PostgreSQL (via TypeORM)
• Infrastructure: Serverless Framework, AWS Lambda, Terraform
• AI/LLM: AI SDK, LangChain.js, Agents SDK for building AI-native features
• Workflow: Fully automated CI/CD with daily production deployments

• Experience: 7+ years of professional software development, with meaningful time in a senior, staff, or founding engineer role. High-growth SaaS experience is a plus, but we value builders who’ve shipped products from zero-to-one just as much as those who’ve scaled existing platforms.
• Full-stack Mastery: Expert-level proficiency in the TypeScript/Node.js/React ecosystem. You should be equally comfortable optimizing a React component and debugging a PostgreSQL query.
• Cloud-Native Mindset: Strong experience with cloud infrastructure (AWS preferred, but GCP/Azure experience with willingness to learn is fine). Comfort with IaC (Terraform or similar) and event-driven architectures.
• AI-Augmented Workflow: You actively use AI tools (Claude Code, Cursor, Copilot, or similar) in your daily development and can demonstrate how they change your process — not just autocomplete, but planning, architecture, and code generation. You should have built something with LLMs beyond wrapper APIs: RAG pipelines, agent architectures, or production AI features.
• Product Fluency: You think in terms of user value, not just lines of code. You can explain complex technical trade-offs to non-technical stakeholders clearly.
• Execution Focus: A proven track record of taking products from initial concept to production. We care more about what you’ve shipped than what you’ve designed on a whiteboard.
• Communication: Fluent English. Clear, concise async communication. The ability to influence without formal authority

Nice to Have

• Experience as a founding engineer or early-stage technical co-founder
• Production experience with LangChain.js, LangGraph, or similar agent frameworks in TypeScript
• Experience migrating or evolving legacy architectures while keeping the product running
• German language skills

Location

• Remote (EMEA, GMT±2) | Ideally DACH region with occasional Cologne office presence

• Build strong technical and market expertise in the high-growing SaaS market.
• Full responsibility from day one.
• Work with our amazing international team.
• 30 days of vacation.
• Flexible working hours.
• €1.000 / year Learning budget.
• State-of-the-art equipment and equipment budget.
• In-person Gatherings.

Application Process

• Interview with Talent Acquisition Manager
• Interview with the Hiring Manager
• Technical Interview with Team
• Interview with one of our Founders
• Reference Check

The contact person for this role is Frieda Möcker, Head of People & Culture. Feel free to reach out to her with any questions!

As an equal employment opportunity employer, Sastrify is committed to promoting an inclusive work environment. We want all of our employees to feel valued, appreciated, and free to be who they are at work, regardless of race, colour, ancestry, religion, gender, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or veteran status.