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

Description

Job Overview

• Source: Arbeitnow
• Location: Berlin
• Job Type: Full-Time

Job Description

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.

Find Jobs in Germany on Arbeitnow

Expert Career Tips for Senior React Engineer - Full Stack & AI Products (m/w/d) Roles

To succeed in a competitive market as a Senior React Engineer - Full Stack & AI Products (m/w/d), you need more than just technical skills. Here are some expert strategies to elevate your profile:

• Build a Strong Portfolio: For technical roles, a clean GitHub or a personal project site is essential. For non-technical roles, a case study portfolio demonstrating problem-solving and impact is equally valuable. Show, don't just tell, what you have achieved in your previous positions.
• Master the Narrative: When interviewing, use the STAR method (Situation, Task, Action, Result) to structure your answers. Quantify your results wherever possible—mentioning "increased efficiency by 20%" is much more impactful than saying "improved efficiency."
• Continuous Learning: The industry moves fast. Whether it's staying updated with the latest AI tools or mastering a new management methodology, continuous professional development is key. Consider obtaining industry-recognized certifications that align with Senior React Engineer - Full Stack & AI Products (m/w/d) requirements.
• Networking: Connect with other professionals in similar roles. Join online communities, attend webinars, and engage in meaningful discussions on professional social networks. Often, the best opportunities come through referrals and community engagement.
• Soft Skills Matter: Communication, empathy, and leadership are often the deciding factors between two equally qualified technical candidates. Cultivate these skills as they are universally valued across all industries and seniority levels.

Additionally, research the specific company's culture and values. Tailoring your application to show how you align with their mission can significantly increase your chances of moving forward in the process.

Salary & Compensation

Salary not disclosed; typically competitive for the role.

Work Arrangement

Type: On-Site

Standard business hours at the office.

Comprehensive Application Strategy & Hiring Process

Applying for a new role is a marathon, not a sprint. Follow this strategic approach to maximize your success rate:

1. Initial Research & Tailoring

Don't send the same resume to every employer. Spend at least 30 minutes researching the company. Look for recent news, their product roadmap, and their team structure. Modify your summary and core competencies to reflect the specific keywords found in the job description.

2. The Perfect Cover Letter

If the application allows for a cover letter, use it to tell a story that your resume cannot. Explain why you are passionate about this specific company and how your unique background makes you the perfect fit for the challenges they are currently facing.

3. Navigating the Multi-Stage Interview

Most modern hiring processes involve 3-5 stages. This typically includes a recruiter screen, a technical or skill-based assessment, a peer interview, and a final leadership round. Prepare for each stage differently: focus on enthusiasm and fit for the recruiter, technical depth for the assessment, and strategic vision for the leadership round.

4. Post-Interview Follow-Up

Always send a personalized thank-you note within 24 hours of each interview. Reference a specific topic discussed during the call to demonstrate your active listening and genuine interest in the role.

By following these steps, you demonstrate a high level of professionalism and attention to detail that sets you apart from the average applicant.

Typical Interview Process

1. Resume screening
2. HR call
3. Skill interview
4. Final manager interview
5. Offer

Tip: Research the company's products and culture.

Global Market Intelligence & Relocation Insights

At JobSetuu, we specialize in helping talent navigate the global job market. Here is what you need to know about the current landscape in Berlin and beyond:

The demand for skilled professionals is increasingly borderless. For roles based in Berlin, understanding the local cost of living, visa requirements (if applicable), and cultural nuances is vital. If this is a remote role, consider the time zone alignment and the asynchronous communication culture of the hiring organization.

Relocation Support: Many forward-thinking companies offer relocation packages that include moving stipends, temporary housing, and legal assistance with work permits. When evaluating an offer, look beyond the base salary—consider the total compensation package, including equity, bonuses, and healthcare benefits.

Work-Life Balance Trends: Hybrid and remote work have become standard in many regions. Research the local labor laws and common practices regarding work hours and vacation time to ensure the role aligns with your lifestyle goals.

Leveraging JobSetuu's tools can help you compare salaries across different cities and understand the "purchasing power" of your potential offer, ensuring you make an informed decision for your long-term career path.

Skills & Competency Roadmap for Professional Development

To remain competitive in Professional Development, we recommend focusing on the following core competencies over the next 12-18 months:

• Technical Mastery: Deepen your expertise in the core tools and languages relevant to your field. For developers, this might be cloud architecture; for marketers, it might be data-driven attribution modeling.
• AI Augmentation: Learn how to leverage generative AI and automation tools to increase your productivity. Understanding how to integrate these technologies into your workflow is becoming a non-negotiable skill.
• Leadership & Strategy: Even in individual contributor roles, the ability to think strategically and lead projects from inception to completion is highly valued. Focus on stakeholder management and high-level project planning.
• Data Literacy: The ability to interpret data and use it to drive decisions is essential across all business functions. Familiarize yourself with data visualization and basic analytical concepts.

By investing in these areas, you not only prepare yourself for the role you are applying for today but also build a resilient foundation for the opportunities of tomorrow.

Apply via JobSetuu

Discover your next career milestone on JobSetuu. This Senior React Engineer - Full Stack & AI Products (m/w/d) position is part of our commitment to bringing you the most relevant and high-impact job openings globally. At JobSetuu, we simplify your job search by aggregating premier listings and providing the tools you need to stand out. Don't miss the chance to elevate your professional journey—explore more opportunities and career insights on our platform today.