Job
- Level
- Lead
- Job Field
- Web, Software, Full Stack
- Employment Type
- Full Time
- Contract Type
- Permanent employment
- Location
- Berlin
- Working Model
- Onsite
Job Summary
In this role, you will design and develop core systems for a property management platform, ranging from intuitive frontends to robust backend services, while owning critical user experiences.
Job Technologies
Your role in the team
- As Lead Fullstack Engineer at hallo theo, you design, build and operate the core systems of our AI-native property management platform.
- You work hands-on across the stack - from intuitive frontends to robust backend services and data flows - and take real ownership for critical user journeys.
- You work with great attention to detail, empathy and a solution-oriented mindset, with a strong feel for both our users and our technology, and you help turn ambiguous problems into simple, impactful product experiences.
- Own the end-to-end delivery of features and services - from discovery and technical design through implementation, testing, rollout and monitoring in production.
- Build and evolve reliable backend and frontend components (APIs, services, UIs) that integrate with our web tech stack and data layer.
- Improve our architecture and codebase: refactor, define clear interfaces and keep our platform secure, observable and maintainable.
- Collaborate closely with Product, Design, and Operations to shape scope, break down complex problems, and make pragmatic trade-offs between speed and quality.
- Act as a technical sparring partner and mentor for other engineers, supporting good engineering practices and a healthy engineering culture.
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Our expectations of you
Qualifications
- Strong product mindset: you think in user journeys and outcomes, not just tickets, and you are comfortable making trade-offs under ambiguity.
- Solid understanding of LLMs, RAG and current AI trends, and motivation to apply them pragmatically in a real product.
- Business-fluent German (C1 or higher) and strong English skills, as you'll work with German-speaking stakeholders and an international team.
Experience
- 6-8 years of experience in software engineering, ideally in product-driven environments (startups, scale-ups or similar), with a strong track record in complex and uncertain projects.
- Proficient in at least one modern programming language and experienced in a web tech stack (e.g., Python and SQL, plus modern web frameworks and APIs).
- Experience operating services in the cloud (e.g., AWS, GCP, or Azure), including CI/CD, logging, monitoring, and basic security practices.
- Experience in domains with complex operations or workflows (e.g. proptech, fintech, marketplaces or B2B SaaS).
- Prior experience in a "tech lead" capacity (leading projects or streams), even without formal line management.
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What we offer
- At hallo theo, you work on AI with real impact: we are not just building tools, we are reshaping the everyday reality of millions of people who live in and manage properties.
- You will join an interdisciplinary team of experts from real estate, tech, and operations and help define how modern AI products are built and operated in our industry.
- With a clear, ambitious vision and a tech- and AI-first operating model, you'll have the autonomy and responsibility to shape our platform, our engineering practices and the future of property management in Germany.
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Topics that you deal with on the job
Job Locations
This is your employer
hallo theo
hallo theo GmbH is a forward-thinking company based in Berlin that specializes in contemporary property management. With an emphasis on local teams and AI-driven methods, it is transforming the property management sector in Germany. The company is expanding through strategic acquisitions and investments in personnel and infrastructure.
Description
- Company Type
- Startup
- Working Model
- Onsite
- Industry
- Construction, Real Estate, Building Services
Lead Full Stack Engineer
- Location
- Berlin
- Working Model
- Onsite
- Diversity
- Open for all genders
