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Senior React Engineer - Full Stack & AI Products (m/w/d)

Berlin, Hybrid, München, remote, Sofia
Full-time
Permanent employee

Your mission

You don't just want to build features - you want to build AI products that solve real problems for real users, with React as your primary tool and Python as a solid backend foundation? Then you're in the right place.

We're a family-owned scale-up headquartered in Munich with over 400 employees across five locations in Europe. Our platform gives thousands of people worldwide a flexible, self-determined way to work - and we're still growing.

AI is not a trend for us: we've been running AI features in production long before the hype started - backed by a strong research team in NLP, Speech and Computer Vision. Now we're building a dedicated AI Unit that owns AI products end-to-end - like a startup inside a scale-up.

We're looking for you: a (Senior) Full Stack Engineer (m/f/d) with a strong React foundation who lives end-to-end ownership and builds AI products that users can rely on every single day.

Work fully remote or hybrid from our offices in Munich, Berlin or Sofia (Bulgaria).

  • React-first UI development: You build complex, high-performance frontends with React Router 7+, TypeScript and deliberate component design - for voice interfaces, coaching tools and AI QA dashboards used by agents on a daily basis.
  • AI integration from UI to service layer: You wire LLM APIs, voice models and NLP services into production-ready systems - and build the Python backends (FastAPI/Django) that make those integrations run reliably.
  • End-to-end ownership: You take systems through their full lifecycle - from MVP and pilot to high-scale production systems processing thousands of calls per day. Performance, stability and monitoring (Prometheus/Grafana) are always on your radar.
  • Solve real problems: Working closely with Product Managers, AI Engineers and other engineering teams, you translate business requirements into technical solutions that actually ship - pragmatic, impactful and user-focused. Good UX starts in the code.
  • Creative freedom: You bring your own ideas to architecture decisions, component design and development processes. Your perspective shapes how our AI products look and work.

Your skillset

  • React expertise (must-have): You bring several years of hands-on experience with React and TypeScript - component architecture, state management, performance optimization and testing are part of your daily work, not just theory. You use React Router 7+ and modern patterns (Hooks, Composition) as a matter of course.
  • Full stack breadth: You build solid Python backends with FastAPI or Django and are comfortable with BFF patterns, REST APIs and database integrations (PostgreSQL, MongoDB). Our stack: Python 3.11, React Router 7 with TypeScript, type hints and pre-commit hooks for clean code.
  • AI integration experience: You've shipped LLM APIs, voice services or NLP models into production systems - not just side projects. You know how to embed AI outputs into UIs that actually feel good to use.
  • Tooling & infrastructure: Docker, Git and CI/CD pipelines are part of your everyday workflow. You're comfortable on Linux systems and ensure stable development and deployment processes. "You build it, you run it" - Prometheus and Grafana are familiar territory.
  • Ownership & pace: You turn rough requirements into concrete tasks, work proactively with cross-functional teams, and know when clean code matters and when shipping fast matters more.

Your winning deal

  • Your Benefits: 30 vacation days, monthly lunch allowance (€69), "Givve" card topped up with €50/month, discounts via Corporate Benefits, JobRad leasing, pension scheme support, and legendary team/company events.
  • Your Workplace: A modern, dog-friendly office and flexible hybrid working model. Plus: 2 weeks of "Workation" per year within the EU (for EU passport holders).
  • Your Footprint: A key role in a profitable company where you’ll have the freedom and trust to shape our journey and help define the future of work.
  • Our Culture: We offer an open, authentic, and supportive team culture. We value bold decisions, fresh thinking, and humor – and we’re excited to take the next steps with you.
  • Your Opportunity: From day one, you'll have the chance to take ownership, drive innovation, and grow together with a team of experts – shaping both the company and your career.

About us

Are you looking for a profitable scale-up that offers you long-term prospects and a disruptive business model with a growth-oriented corporate culture? Do you also want to grow beyond the usual standards, bring your own initiative and appreciate actively shaping topics?  

Then yoummday is the right place for you! 

yoummday: “You made my day” - As an innovative SaaS platform, we connect companies with highly qualified freelance call center agents (“Talents”) worldwide. Our digital solution enables flexible, scalable and efficient customer support - without the need for traditional call center structures. We are a family-run Munich-based scale-up with over 350 employees (“Daymakers”) at 5 locations in Europe and 1 in the USA - further growth is inevitable ;).  

Become part of our team and set new standards in AI-supported customer service with us to create smart, data-driven solutions that inspire.

At yoummday, we value diversity and equal opportunities. We welcome applications regardless of gender, background, age, sexual orientation, religion, or disability. Different perspectives make us stronger – which is why we actively promote an inclusive work environment where everyone can reach their full potential.