AI Full Stack Engineer (m/w/d)

What we do

Merantix Momentum, part of the Merantix Group, is a Berlin-based boutique consulting and implementation firm accelerating AI transformation across many industries through B2B solutions as well as publicly funded research projects. We work across domains including manufacturing, the public sector, healthcare, and more, transforming businesses by acting as an external machine learning department, combining state-of-the-art machine learning with a culture of rapid iteration.

Companies are under pressure to make rapid progress with AI, and most don’t know where to start. Your role is to act as a trusted bridge: to understand where a client’s real operational pain points lie and, together with our technical team, develop solutions that truly deliver. You’ll be responsible for managing relationships with mid-market and enterprise clients - from the initial discussion through to handover and beyond. We already have reference projects in the industry. You’ll build on this foundation and take it further.

Your role

An AI solution is only as valuable as the experience it delivers to its users.Your role will be to bring our AI solutions to life by building intuitive, scalable, and production-ready applications that serve users and integrate seamlessly with other systems.

You'll work on challenging, high-impact project, taking ideas from initial concepts to real-world products. We're looking for someone who doesn't just build what's requested, but actively thinks about what should be built - and how to make it better.

Your main responsibilities

• Solve complex industry problems by designing and developing production-grade, AI-augmented information systems.

• Develop platforms for integration, curation, exploration, and monitoring of data at scale.

• Build, deploy, and maintain scalable applications in cloud environments such as AWS or GCP.

• Collaborate closely with ML, data, and infrastructure engineers to deliver reliable, production-ready AI solutions.

• Take ownership beyond implementation:proactively identify opportunities to improve products, challenge existing approaches, and propose solutions that create meaningful value for our clients and their users.

• Work closely with clients to understand their business objectives, translate them into technical solutions, and help shape the product vision and roadmap.

• Contribute to architectural decisions and continuously improve the performance, reliability, and usability of our solutions.

Your profile

You are a great fit for our team if you bring these qualifications:

• BSc in Computer Science, Software Engineering, a related technical field, or equivalent professional experience.

• Strong programming skills in Python, TypeScript, HTML5, CSS3, and React.

• Experience in user-centered frontend development and API development (e.g., REST, GraphQL).

• Experience designing and developing scalable Python backends.

• Hands-on experience with cloud platforms such as AWS or GCP, including deploying, operating, and maintaining production applications.

• Experience with SQL (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., Bigtable, MongoDB).

• An entrepreneurial mindset and strong product intuition:you think beyond technical requirements, understand the bigger picture, and actively look for ways to make products more valuable, effective, and successful.

• A proactive, solution-oriented attitude, with the confidence to challenge assumptions, suggest improvements, and take ownership of outcomes.

• Strong communication and collaboration skills, including the ability to engage with clients and understand their needs.

• Fluency in English.

• Willingness to work onsite at our Berlin AI Campus five days a week. This is needed due to a special project you would work for.

Nice to have qualifications:

• Experience in Finance, Financial Services, or FinTech, including familiarity with financial data, workflows, or industry-specific challenges.

• Experience with cloud-native architectures, containerization, Kubernetes, or infrastructure-as-code.

• Experience building applications powered by machine learning, LLMs, or other AI technologies.

What we offer

• Exciting topics & excellence: Insights into applied ML research, working alongside strong engineers and entrepreneurs

• Growth opportunities: Real career prospects at a fast-growing startup

• International team with a flat hierarchy and an open feedback culture

• Learning & development: Annual budget for conferences and further training (EUR 2,500), plus weekly and monthly AI events and extra vacation days (5 days)

• Budget for additional IT equipment (EUR 350)

• Benefits of your choice (EUR 50 per month): mobility, gym membership, shopping, company bike leasing

• Modern office at the AI Campus Berlin, with the equipment you need

• Regular team and company events

Please note: This will be a fixed term contract starting from January 2027 till July 2027 with the possibility to extend.