Backend Engineer – AI/ML

qontext· Engineering
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📍 BerlinFullTime

About this role

We’re building the independent context layer for AI – a missing piece of infrastructure that allows every AI process in a company to act on relevant and up-to-date context.

We’re a fast-moving, well-funded team based in Berlin, backed by HV Capital, Zero Prime and the founders of n8n, neo4j, Cognigy, make.com, Celonis and Nabla.

The Opportunity

In this role, you’ll design and scale the backend systems that power how a company’s “brain” functions – the logic that lets AI reason over live company knowledge instead of static data.

You’ll own the architecture behind our ingestion and retrieval layers, transforming unstructured information into structured, queryable context. Your work will directly define how AI systems across our customers’ organizations access relevant, up-to-date context in real time.

Qontext is already getting used by 10+ design partners and we are aiming to launch v1 of our platform in Q2 2026.

If you enjoy deep technical challenges, working from first principles, and shipping products that define a new category – this role is for you.


What You’ll Do

  • Design and implement the core backend logic of our AI context engine

  • Build and optimize our data ingestion pipeline – transforming raw tool data into structured knowledge graphs

  • Develop high-performance retrieval and ranking systems, combining vector search, rule-based logic, and entity recognition

  • Productize complex processes via APIs and modular components (MCP, SDK)

  • Create evaluation and experimentation frameworks to continuously improve performance and contextual accuracy


You’ll Thrive Here If You…

  • Love building distributed systems and tackling high-complexity logic problems

  • Are fluent in TypeScript or Python and have an eye for clean, scalable architecture

  • Enjoy turning research and theory into production-grade products

  • Have a bias for ownership, and thrive in fast-paced, early-stage environments

  • Are endlessly curious, pragmatic, and care about how AI can be made truly useful


Why Join Us

  • Challenge: Highly complex intellectual & logical challenge

  • Cutting Edge: Turning latest research into a product used by the masses

  • Mission: Build the foundational context infrastructure for AI processes

  • Impact: Shape the company and architecture from day one

  • Ownership: Competitive salary + meaningful early equity

  • Culture: Deep-tech mindset, transparency, radical candor and fast execution


Process

  1. Get to know each other – 30 min

  2. Technical interview – 30 min

  3. Technical take-home case – 3 h

  4. Case discussion – 45 min

  5. Offer


Practical Info

  • Location: Berlin

  • Start date: ASAP

  • Type: Full-time

  • Compensation: €65k - €100k + equity package

Frequently Asked Questions

Is the salary disclosed for the Backend Engineer – AI/ML position at qontext?
The salary for this Backend Engineer – AI/ML role at qontext is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Backend Engineer – AI/ML position at qontext located?
This Backend Engineer – AI/ML role at qontext is based in Berlin. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Backend Engineer – AI/ML role at qontext full-time or part-time?
This is listed as a FullTime position. It is posted as a Backend Engineer – AI/ML role in the Engineering department at qontext.
Which team or department does the Backend Engineer – AI/ML at qontext belong to?
This Backend Engineer – AI/ML position is part of the Engineering department at qontext. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Backend Engineer – AI/ML position at qontext?
Click the "Apply Now" button on this page. You will be redirected to qontext's official application portal hosted on ashby where you can submit your application directly.
When was the Backend Engineer – AI/ML job at qontext posted?
This Backend Engineer – AI/ML position at qontext was posted on Mar 6, 2026. Apply as soon as possible — early applications are often reviewed first.
Backend Engineer – AI/ML
qontext
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