Hire the Best Software Development Freelancers
in Germany

✅ TOP-RATED PLUS | 🥇 Top 3% of freelancers | Full-time freelancer on Upwork with extensive professional experience in concept and reverse engineering of Robotics/Automation solutions, either using 3D Printing or Industrial machining processes, Qualitative Detail R&D, 2D/3D CAD Modeling, Photorealistic rendering, ROS2 control, testing, and debugging, AI ML/RL, Metaverse, Blockchain NFT marketplace. ✅ I am a Robotics/Automation Engineer with 5+ years of professional experience in various fields. I am willing to travel internationally for work. I specialize in developing real-time motion control RL-based policies for humanoid robots, such as the Unitree G1, encompassing simulation, gait optimization, hardware deployment, and neural inference. I am proficient in: • Smart robotics engineering (from mechanical to software end-to-end solution) • A passion for robots that solve problems or provide a meaningful purpose • New concept R&D design and development of any SPM system, Automation Conveyor system, Humanoid robot, Robotic Arms, etc. • Path planning and navigation planning system on ROS, Isaac Sim, and MuJoCo simulations • 3D modeling, 2D drawing, and Engineering Drawing using SolidWorks and Inventor • 3D model rendering/animation utilizing Blender, Unity, Unreal Engine, and Keyshot • ML / RL & AI algorithms, LLM model development, and also an expert in RoboDK • Highly experienced in working with actuators and motors in machinery development • Brief evolution in Reverse engineering • Have worked with many companies, from startups to corporate R&D groups • I have an extensive network of industry specialists and vendor suppliers, both domestic and international. If it can be defined, it can be made ✅ As a blockchain developer, I led a team under my supervision. All of them are working nowadays and have many clients. We have worked mainly on services in Crypto NFT, Blockchain, Unity 3D, and Metaverse development. ✅ I am eager to work with you to meet your expectations and build a long-term relationship. Please get in touch with me to discuss your project.

Expert Unity Game Developer specializing in high-performance Mobile Games, Multiplayer (Photon/Fusion/Quantum), and AR/VR apps. With 10+ years of experience and 100+ games delivered, I help studios bring prototypes to full-scale launch using Unity and C#. Whether you need an optimized build, complex multiplayer integration, or backend architecture, I deliver stable, scalable, and polished results. What You’ll Get Working With Me: 1️⃣ Clean & Scalable Code: Maintainable, production-ready architecture 🧩 2️⃣ High Performance: Optimized builds with smooth FPS & minimal crashes ⚡ 3️⃣ Full-Stack Mastery: Unity + Backend (PlayFab/Firebase) + Deployment ☁️ 4️⃣ Reliable Delivery: Clear communication and strict adherence to deadlines ⏰ Tech Stack: Engine: Unity (2D/3D), Unreal Engine Languages: C#, .NET Core, Node.js Multiplayer: Photon (PUN2, Fusion, Quantum), Mirror, Custom Servers Backend: Firebase, PlayFab, AWS, Azure Platforms: iOS, Android, WebGL, VR/AR (Quest, Vive), PS5/Xbox/Switch Creative & Design: 3D Modeling, VFX, and Animation (Blender, Maya, Photoshop). 💬 Ready to build? Click 'Invite to Job' to share your project idea. I’ll reply with a short action plan and a clear estimate—no fluff, just solutions.

Hey There! Ready to Crush Your Project Goals? 🚀 Looking for a Technical Product Manager with the experience to get things done, a dash of humor to keep things light, and a knack for delivering results? Look no further! About Me: I'm your go-to Top-Rated Freelancer with 100% job success, armed with over 5 years of hands-on experience in Agile product management. Serious about work but never too serious to crack a joke (or two), I bring a refreshing approach to the table. My Game Plan: My product management playbook is simple yet effective: Rock-solid communication, teamwork vibes, and a relentless pursuit of excellence. I firmly believe that transparency, collaboration, and a positive mindset are the secret sauce for project success. Why Choose Me: Seasoned Pro: With 5 years under my belt, I've seen it all and conquered it all. Your projects are in safe hands. Results-Driven: I'm all about nailing those project goals. Your unique requirements become my mission, and I'm here to make sure they're not just met but exceeded. End-to-End Support: From brainstorming your product's inception to celebrating its successful delivery, I've got you covered every step of the way. Adaptability: Whether you're a trailblazing startup or a corporate giant, I can flex to match your needs and objectives seamlessly. Let's Dive In: Ready to dive into your product adventure? Let's collaborate and make some magic happen. I'm here to lead your product to greatness while ensuring a work atmosphere that's both pro and fun. Reach out today, and let's chat about how I can steer your project ship to success!

👋 Are you a business leader with great ideas, already exploring tools like Lovable and Claude but need a technical expert to bring them to life? I'm Ivan, and I specialize in partnering with growing companies to turn their low-code prototypes and business vision into scalable, production-ready applications. You bring the business expertise; I'll handle the heavy lifting to ensure it's built for performance, security, and long-term growth. Many businesses can build a prototype, but struggle to make it robust. That's where I come in. With 12+ years in full-stack engineering and a deep focus on modern low-code/AI tools, I bridge the gap between your initial concept and a powerful, market-ready solution. How We Can Partner Together: 🧩 Collaborative Build: You and your team can continue to prototype and design the frontend using tools you love (like Lovable). I'll work alongside you, architecting the backend, setting up scalable databases (Supabase, Xano), and handling complex integrations. This way, your vision is executed perfectly. 📦 Full Development: Have an idea but want me and my team to handle the entire process? I can take your concept from zero to a fully functional, scalable application using the best tools for the job (Bubble, WeWeb, Lovable, custom code, etc.). Why Partner With Me? ✅ You get a true technical partner: I don't just build; I provide the architectural guidance and technical clarity you're missing. We'll make the right decisions together to ensure your application is a long-term success. ✅ The best of both worlds: You get the rapid iteration and business involvement of low-code, combined with the robust, scalable power of custom code and expert architecture. Your application will be both quick to market and built to last. ✅ Focus on what you do best: You can concentrate on the business logic and user experience, knowing you have a trusted partner handling the complex technical challenges from custom API integrations to secure, scalable backends. 🤝 Ready to turn your vision into a powerful, scalable reality? Let's discuss your project.

🌟 Expert Vetted Talent – Top 1% on Upwork ✅ Proven Record of Hours, Earnings and Client Satisfaction 🚀 Fast Response and Clear Communication 💯 100% Job Success – Clients’ Top Ratings 🔝 Top Rated Plus (Freelancer and Agency) 🔎 Open to New Challenges and Opportunities 👋 𝐇𝐞𝐥𝐥𝐨 𝐚𝐧𝐝 𝐖𝐞𝐥𝐜𝐨𝐦𝐞! Thank you for visiting my profile. I’m 𝗧𝗮𝗽𝗮𝘀 𝗗𝗮𝘁𝘁𝗮, 𝗮 𝗘𝘂𝗿𝗼𝗽𝗲 𝗯𝗮𝘀𝗲𝗱 𝗳𝘂𝗹𝗹 𝘀𝘁𝗮𝗰𝗸 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with 10 years of experience building scalable, reliable, and business driven software solutions. With thousands of hours logged on Upwork, I’ve helped clients design, develop, and optimize their applications, consistently earning top ratings for quality, problem solving, and responsiveness. If you have a project in mind or a technical challenge to solve, let’s connect. I’d be happy to discuss how I can help you achieve your goals. 💡 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞 1. 𝙀𝙭𝙥𝙚𝙧𝙞𝙚𝙣𝙘𝙚 𝙖𝙣𝙙 𝙀𝙭𝙥𝙚𝙧𝙩𝙞𝙨𝙚 Years of hands on experience across multiple technologies enable me to find elegant, efficient solutions for complex problems. 🗯️ “He was very responsive and clearly explained what was needed. Definitely an expert in his work.” 2. 𝙀𝙛𝙛𝙚𝙘𝙩𝙞𝙫𝙚 𝙋𝙧𝙤𝙗𝙡𝙚𝙢 𝙎𝙤𝙡𝙫𝙞𝙣𝙜 I quickly identify business needs and deliver customized, high impact solutions. 💭 “Tapas was able to quickly understand what I needed and delivered beyond expectations.” 3. 𝙎𝙮𝙨𝙩𝙚𝙢 𝙇𝙚𝙫𝙚𝙡 𝙏𝙝𝙞𝙣𝙠𝙞𝙣𝙜 I take a holistic approach, ensuring code quality, scalability, and long term maintainability. 💬 “LIFE SAVER! I’ve hired Tapas for multiple projects and will continue to do so. Great developer!” ⚙️ 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗮𝗻𝗱 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: PHP, Laravel, Symfony 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, Next.js, JavaScript, HTML, CSS, TailwindCSS, Shadcn, Alpine.js 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: MySQL, PostgreSQL, NoSQL, MongoDB 𝗗𝗲𝘃𝗢𝗽𝘀: Linux, Apache, Nginx, AWS, Git 𝗔𝗣𝗜𝘀 𝗮𝗻𝗱 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: REST, GraphQl, JSON, Third Party Integrations 🧩 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐈 𝐎𝐟𝐟𝐞𝐫 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Architecture, design, coding, testing, deployment, and long term maintenance. 𝐒𝐲𝐬𝐭𝐞𝐦 𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧: Cloud setup, optimization, scaling, recovery, backup, and cost management. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: Schema design, performance tuning, migrations, and recovery strategies. 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐋𝐞𝐚𝐝𝐞𝐫𝐬𝐡𝐢𝐩: Planning, requirements, developer guidance, QA, and stakeholder communication. 🚀 𝐋𝐞𝐭’𝐬 𝐁𝐮𝐢𝐥𝐝 𝐒𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐆𝐫𝐞𝐚𝐭 I’m always excited to take on new challenges, whether it’s optimizing existing systems or building powerful new applications from scratch. 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗼𝗿 𝗮𝗻 𝗶𝗻𝘃𝗶𝘁𝗲 and I’ll respond promptly. Let’s make your next project a success.

Full Stack Developer and AI Engineer - CEO and Co-Founder of Invirial, 𝐚 𝐬𝐞𝐧𝐢𝐨𝐫 𝐭𝐞𝐚𝐦 𝐨𝐟 𝟗+ shipping B2B SaaS and Fintech products. Track record: Member since 𝟐𝟎𝟏𝟐 · 𝟏𝟎𝟎% JSS · $𝟔𝟎𝟎𝐊+ earned on this profile · $𝟒𝐌+ earned across our agency. To be clear upfront: I don’t write the code myself on every project. As Co-Founder, I scope, architect, and oversee delivery — my Full Stack Developers and AI Engineers ship. That’s why clients hire us instead of a solo freelancer: real capacity, senior oversight, and no single point of failure. 𝐖𝐡𝐚𝐭 𝐰𝐞 𝐛𝐮𝐢𝐥𝐝 Most clients come to us with one of two problems: they need a product built properly from scratch — an MVP that ships in weeks, not quarters — or they have an existing system that needs a senior Full Stack Developer or AI Engineer team to take ownership and move it forward without hand-holding. We’re a Full Stack Developer and AI Engineer team in one shop. That matters in 2026 because the line between the two has collapsed: modern SaaS products need React and Next.js on the frontend, Node and Python on the backend, and LangChain, RAG pipelines, and OpenAI or Claude integration as core features — not as a bolt-on. We own the whole stack end-to-end so you don’t have to coordinate three vendors. Our Full Stack Developers ship in: React, Next.js, Node.js, TypeScript, JavaScript, Python, Django, FastAPI, MongoDB, PostgreSQL, Supabase, Tailwind CSS, shadcn/ui, Stripe, AWS, Docker, REST APIs, third-party API integration. MERN stack and Next.js + Supabase + Stripe are our two default builds for SaaS MVPs. Our AI Engineers ship in: Python, LangChain, LangGraph, OpenAI API (GPT-4o, GPT-5), Claude / Anthropic API, RAG pipelines, vector databases (Pinecone, Chroma, FAISS, Weaviate), LlamaIndex, FastAPI, Hugging Face, fine-tuning (LoRA/QLoRA), n8n, Make. com, AWS Bedrock, Azure OpenAI, prompt engineering, AI agent development, chatbot development, and voice stack (Vapi, ElevenLabs, Twilio). We don’t do prompt-only ChatGPT wrappers. Our AI Engineers ship real agentic workflows — multi-step reasoning, tool calling, memory, guardrails, and production deployment. 𝐖𝐡𝐚𝐭 𝐰𝐞 𝐝𝐞𝐥𝐢𝐯𝐞𝐫 Whether you need a React developer for a SaaS dashboard, a MERN stack developer for a full product build, an AI agent developer for a multi-agent system, a generative AI engineer for a RAG chatbot, or a Next.js developer to migrate from WordPress or Bubble — we have the right senior on the team for it. Common deliverables: B2B SaaS MVPs from scratch, Fintech platforms with Stripe and compliance-aware architecture, RAG chatbots and knowledge-base assistants, AI automation with n8n + Claude, AI voice agents, admin dashboards with auth and RBAC, no-code-to-code migrations (Bubble/Lovable/Framer → coded stack), and ongoing engineering for products in growth. Recent Full Stack Developer and AI Engineer projects A snapshot of the project archetypes our team ships most often: 🔘 Fintech SaaS platforms — Next.js + Supabase + Stripe builds with subscription billing, KYC flows, role-based access, and compliance-aware architecture. Senior Full Stack Developer–led. 🔘 RAG chatbots and knowledge-base assistants — production-grade retrieval pipelines built by our AI Engineers using LangChain, Pinecone, and OpenAI or Claude, with guardrails, source citations, and LangSmith evaluation in place from day one. 🔘 AI agent and agentic workflow systems — multi-agent architectures using LangGraph, OpenAI Agents SDK, or n8n + Claude for lead generation, CRM enrichment, and internal operations automation. Built by AI Engineers who’ve shipped agents in production, not just demos. 🔘 B2B SaaS MVPs from scratch — full-cycle Full Stack Developer builds covering product architecture, React/Next.js frontend, Node or FastAPI backend, payment integration, and AWS or Vercel deployment. Designed for clients who need to launch fast and scale without a rebuild. 🔘 AI-augmented Full Stack rebuilds — taking an existing B2B SaaS or Fintech product and adding LLM-powered features (chat with your data, AI copilots, smart automation) through our combined Full Stack Developer + AI Engineer workflow. The hybrid build is what we do best. Why clients pick our Full Stack Developer and AI Engineer team over a solo freelancer A senior team of 9+ means we ship faster than a solo Full Stack Developer or AI Engineer and survive bus factor. CEO and Co-Founder oversight on every project means architecture decisions get made by someone with 14+ years of shipped products behind them — not by whoever happens to be assigned to your account. And because we work as a single agency rather than a marketplace of strangers, the engineer reviewing your code on Friday is the same one fixing the bug on Monday. If you’re building a B2B SaaS or Fintech platform and need a senior team that ships, let’s talk.