Product Engineer (AI Apply)
Product Engineer (AI) @Kombo
📍 Berlin (On-site) · Full-time
TL;DR
Kombo (YC S22) is building HR tech infrastructure that saves engineering teams hundreds of hours by replacing the need for dozens of integrations with one. We're looking for a product-minded full-stack engineer to help build and scale products for a rapidly growing customer base. This is a Berlin-based onsite role.
About Kombo
Kombo is building the unified API for HR, payroll, and recruiting systems. Instead of companies spending months integrating with dozens of different systems, they can integrate once with Kombo and instantly connect to over hundred platforms. We abstract away the complexity of handling different data schemas, authentication methods, and API quirks.
Since going through Y Combinator in 2022, we:
Raised $30M+ of funding from Y Combinator, Acadian Ventures, 486 and other investors
Grew from 0→ $10M+ ARR and hundreds of customers (growth-wise among the ~top-5% of VC-backed startups)
Scaled to process data for the equivalent of 10% of Germany's workforce
Grew to a team of 50+ team members (pictures!) in 2x offices
Kombo is an international company by default. We operate across two main hubs (NYC 🇺🇸 and Berlin 🇩🇪) and work with a globally distributed team representing 20+ nationalities.
What You'll Be Working On
As a Product Engineer (AI), you’ll take full ownership of major features in our AI Apply product — architecting our product, working closely with customers, and shipping high-impact features end-to-end.
Projects you would have worked on in the past:
Using LLMs to power browser automations to parse and apply to job pages at scale
(De)-validating an internal MCP for building integrations more efficiently in a few-week PoC
Stack: TypeScript (required), Node.js, React, PostgreSQL, GCP, Docker, Prisma, Gemini & Langfuse.
Hands-on experience with LLMs and context engineering in production use cases is highly valued.
You don’t need to know everything — we value strong fundamentals and learning velocity.
The Challenge
You're joining at a critical time. This means:
You'll build features that customers actively request and start using the same day - we often get "when can we have this?" messages within hours of releasing new features
Identify and solve problems without bureaucracy — we release 20+ times per day and move fast
Operate in a high-growth environment (2–3× per year) that feels like a new company every few months
Who We're Looking For
We hire entrepreneurial engineers who want to move fast and maintain a high bar for quality.
On a high level, we are looking for entrepreneurial people that are at the top-of-their-game. People at Kombo come from Harvard, Oxford, Stanford, CODE etc., 50% are ex-founders themselves and in general have always done hard, impressive things. Specifically for this role, we are looking for the following skills:
Expertise in designing B2B Software applications
Familiarity with major LLM providers (OpenAI, Anthropic, Google, open-source models) and their APIs
Ideally 3+ years of software development experience
Proficiency or capacity to learn our tech stack: Node.js, React, Postgres, Prisma, TypeScript
Experience with LLM observability and evaluation frameworks (Braintrust, Langfuse, etc.)
Enthusiastic and collaborative work attitude
Previous founding experience is a plus!
This role is perfect for an experienced engineer looking to join a company that has already proven product-market fit but is still in its early days. You are likely a great fit, if:
You thrive when you have autonomy, own as many of the details as possible, and project manage your own work
You have strong engineering fundamentals, code efficiently, and you know what you're great at and what you're less great at
You dislike meetings and would much rather focus your time on building, being productive, and shipping code
Location: This is a Berlin-based onsite role — we believe the best ideas happen together, in person.
Note that while we are rather looking for senior candidates at the moment, we are open to various levels of experience, and if in doubt, please apply :)
What It’s Like To Work at Kombo
Our culture is built around two pillars: high ambition (and thus high-performance) while still providing a fun and supportive environment.
Some tidbits that illustrate this:
We aspire to create an environment of few but very high-performing team members (similar to Netflix or Ashby).
Even though we are in-office, we have a strong writing culture and use long-form documents to make important (one-way) decisions because we believe we make better decisions this way
On average, we get together for a company-wide celebration ~once a week (larger feature release, big new closing, anniversary or birthday!)
Kombo’s Engineering Meme culture is legendary within the company:
Our Engineering Culture
At Kombo, we move fast without compromising long-term quality. Our engineering culture is built around a few clear principles that guide how we design, ship, and maintain software:
Quality & Long-Term Velocity
We optimize for sustainable speed. That means making thoughtful trade-offs between shipping quickly today and protecting future velocity. We invest in strong fundamentals like testing, observability, sound API design, and security, and we treat AI as an accelerator, not a replacement for good engineering judgment.
Ownership End-to-End
Engineers at Kombo own their work from idea to production and beyond. A feature isn’t “done” when the PR is merged, it’s done when it runs reliably in production, delivers customer value, and is maintained over time. This includes rollout, monitoring, iteration, and follow-ups when things break.
Clarity & Written Thinking
We believe good decisions scale when they’re written down. We document context, trade-offs, and intent in PRs, Notion docs, and code comments so others can understand not just what changed, but why. This helps us avoid hidden technical debt and move faster as a team.
If you enjoy high ownership, clear standards, and building systems that last — you’ll feel at home at Kombo.
Closing
Overall, if joining an “SF company in Berlin” sounds appealing to you, then you should apply - even if you don't match all criteria 🙂