Hire the Best CSS3 Developers in San Francisco, CA

👑𝗧𝗼𝗽 𝟭% 𝗘𝘅𝗽𝗲𝗿𝘁-𝗩𝗲𝘁𝘁𝗲𝗱 𝗧𝗮𝗹𝗲𝗻𝘁 | 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 𝗡𝗼𝗱𝗲.𝗷𝘀, 𝗣𝘆𝘁𝗵𝗼𝗻 & 𝗙𝗮𝘀𝘁𝗔𝗣𝗜 | 𝗪𝗲𝗯 & 𝗠𝗼𝗯𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 I am an expert Full Stack Developer with over 12 years of experience in building scalable, high-performance web and mobile applications. With a deep understanding of modern frameworks and technologies such as Node.js, Python, and FastAPI, I have consistently delivered innovative solutions to complex challenges, working across the full stack to build end-to-end solutions. As a top 1% Expert-Vetted Talent, I’ve been pre-screened by industry professionals and talent managers to ensure I meet the highest standards of technical expertise and quality. Throughout my career, I’ve had the privilege of working in dynamic, high-impact roles at some of the most renowned tech companies, where I gained extensive experience in leading engineering teams and architecting advanced systems. 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 1- 𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 Spearheaded large-scale, cloud-based software systems that supported Microsoft’s enterprise solutions, focusing on security, performance optimization, and user experience. Led cross-functional teams to implement key features for Microsoft Azure and Office 365. 2- 𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝗙𝗮𝗰𝗲𝗯𝗼𝗼𝗸 Contributed to the core engineering teams responsible for Facebook’s backend services, handling millions of active users and optimizing real-time data processing. Played a pivotal role in building scalable APIs, improving system performance, and enhancing user experience. 𝟯- 𝗟𝗲𝗮𝗱 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝗛𝗲𝗹𝗹𝗼𝗴𝗼𝘃 𝗔𝗜 Directed a team to build AI-powered government solutions, improving efficiency and accessibility for public services. Collaborated with stakeholders to design innovative features while ensuring system reliability and scalability. 𝗞𝗲𝘆 𝗦𝗸𝗶𝗹𝗹𝘀 & 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 1- Backend Development: Skilled in Node.js, Python, FastAPI, and Express.js for building scalable APIs and microservices. 2- Frontend Development: Experienced with React.js, Vue.js, and HTML/CSS for creating responsive web interfaces. 3- Mobile Development: Expertise in React Native and Flutter for cross-platform mobile app development. 4- Cloud & DevOps: Proficient in AWS, Azure, Google Cloud, Docker, Kubernetes, and CI/CD for scalable deployment. 5- Database Management: Strong in relational and NoSQL databases like PostgreSQL, MySQL, MongoDB, and Redis. 6- Agile & Leadership: Experienced in leading Agile teams, driving project success, and mentoring junior developers. 𝗙𝗹𝗲𝘅𝗶𝗯𝗹𝗲 𝗧𝗶𝗺𝗲𝘇𝗼𝗻𝗲 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆: I am comfortable working across a variety of time zones and can adapt to your team’s working hours, ensuring seamless collaboration no matter where you're based. Whether you need overlapping work hours or full-time availability, I am open to flexible arrangements that align with your team’s needs. 𝗛𝗶𝗴𝗵-𝗤𝘂𝗮𝗹𝗶𝘁𝘆, 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: I have a proven track record of building high-performance systems that scale efficiently, ensuring long-term stability and performance. I am committed to delivering robust solutions that meet business goals while optimizing user experience. 𝗙𝗮𝘀𝘁-𝗣𝗮𝗰𝗲𝗱 & 𝗥𝗲𝘀𝘂𝗹𝘁𝘀-𝗗𝗿𝗶𝘃𝗲𝗻: I thrive in fast-paced environments and understand the importance of meeting deadlines without compromising on quality. I take a results-driven approach to development, always focusing on delivering value quickly and effectively. 𝗣𝗿𝗼𝘃𝗲𝗻 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 𝗮𝗻𝗱 𝗧𝗲𝗮𝗺 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻: Throughout my career, I’ve led multiple cross-functional teams, ensuring strong collaboration and clear communication at all stages of development. Whether working as a lead engineer or as part of a team, I take an active role in mentoring and guiding junior developers to achieve their full potential. 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝘃𝗲 & 𝗖𝗼𝗻𝘁𝗶𝗻𝘂𝗼𝘂𝘀 𝗟𝗲𝗮𝗿𝗻𝗲𝗿: I am passionate about staying ahead of the curve in an ever-evolving tech landscape. My curiosity drives me to constantly explore new tools, technologies, and techniques, so I can apply the best possible solutions to each project I undertake. 𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗚𝗿𝗲𝗮𝘁 𝗧𝗼𝗴𝗲𝘁𝗵𝗲𝗿! With expertise in Full Stack Development, cloud solutions, and Agile, I offer flexible timezone availability and a commitment to delivering high-quality, scalable applications, ready to collaborate and drive results. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Full Stack Developer, Senior Software Engineer, Node.js, Python, FastAPI, React.js, Web Development, Mobile Development, Backend Development, Frontend Development, Full Stack Architecture, API Development, RESTful APIs, Microservices, Cloud Computing, AWS, Azure, Google Cloud, Docker, Kubernetes, CI/CD, Continuous Integration.

$53M+ Raised by Clients | 84+ MVPs Launched | 14 Years Building SaaS Startups | 100% Job Success ✅ Co-Founder & CEO at Beyond the Wow — AI Developer & Startup MVP Studio ✅ CEO at Gearheart — Enterprise SaaS MVP Development Studio (14 Years) ✅ 2x Founder of B2B SaaS Products, 1 Exit ✅ 84+ MVP Launches for Startups & Growth-Stage Teams ✅ Built SmartSuite from Scratch — $38M Raised, 7M+ Users ✅ 2–4x Faster MVP Development Using Claude Code, Lovable, Cursor, and Replit ✅ Top-Rated on Clutch & GoodFirms I'm a 2x founder with one exit and 14 years of experience building B2B SaaS startups. I know firsthand what it means to bet on an idea, run out of runway, and figure out product-market fit the hard way. That's why I work with founders — not as a vendor, but as a partner who's been in the same position. I lead Gearheart and co-founded Beyond the Wow — an AI Developer and Startup MVP studio. Our full stack developer and AI Developer team specializes in SaaS MVP Development and AI Integration, helping founders go from idea to revenue-ready product in weeks. Behind me is a team of 23 senior engineers with 14 years in SaaS — together we've shipped 84+ products for 70+ clients across 7 countries. Whether you're looking for a SaaS Developer partner, need AI SaaS Development, or want a team that understands SaaS Business Development as much as the code — we've done it from both sides of the table. 🌟 OUR ENGINEERING STANDARD Our SaaS MVP Development standard — built by a full stack developer team with 14 years of enterprise product work at Gearheart: - SmartSuite — B2B SaaS platform built from scratch: $1.2M ARR in 4 weeks, $38M raised, trusted by Capital One. - Globalli — HR/payroll platform across 125+ countries, SOC2 Type II, $15M raised. 15+ modules, 21 engineers at peak. 🔧 WHAT WE CAN HELP YOU WITH - Founder Briefing: Before touching code, we help you define your ICP, challenge your value proposition, and confirm whether this MVP is worth building at all. After our session, you'll have clarity — and a solid pitch deck foundation for investors. - Discovery & Prototype: For founders with product clarity — a clickable startup mvp prototype in 5 days. Built with Lovable or Replit by our AI Developer team. - Rescue Diagnosis: Built something on Lovable or Base44 but it's breaking in production? Full code review by senior full stack developer engineers. QA, security audit, sprint plan. - MVP Development: SaaS MVP Development in 3–4 weeks — 2–4x faster than traditional agencies. AI Integration, auth, onboarding, deployment included. - Sprint Subscription: Ongoing support — ship new features at a regular sprint pace as your long-term full stack developer partner. ⚡ MVP SPEED Legal SaaS platform + AI chatbot → ~2 months AI Receptionist with CRM AI Integration → shipped in weeks B2B Dental Referral Startup MVP → 3 weeks Early-stage startup mvp prototype → 5 days Medical device SaaS MVP Development — ICP + PMF + build → 2 weeks 💡 WHY WORK WITH US - Been There as a Founder: I've built, launched, and exited SaaS products myself. Our startup mvp process — and our full stack developer team — is built on real founder experience. - Product Before Code: We ask "should you build this?" before "how do we build it?" Most AI Developer studios skip that question entirely. - AI Speed, No Shortcuts: Our full stack developer and AI Developer team uses Claude Code, Lovable, and Cursor as real engineers. AI Integration built in by default — 2–4x faster without cutting corners. - Offshore Pricing, Enterprise Standard: Ukraine-based SaaS MVP Development team. Competitive rates. The same quality we've held for 14 years. Our Our engineers work across the full spectrum: Python Developer backends, React Developer frontends, REST API and API Automation layers, Machine Learning pipelines, and Twilio integrations. Whether you need a Software Developer, Web Developer, or App Developer — one team covers it all. 🌟 WHAT CLIENTS SAY "They were my choice the moment I met them. Their commitment to solving customer problems and creating the best SaaS product is unmatched." — Jon Darbyshire, CEO at SmartSuite "Not only their great skills, but their accountability and sense of ownership. It feels like an internal team, not a vendor." — Febriani, AVP Product at Bababos ⚙ TECH STACK AI & Integration: AI Integration: Claude Code, OpenAI, FastAPI | AI API Integration: LangChain, Supabase Frontend: Full Stack Web Developer: React, TypeScript, Next.js, Vue.js Backend: AI Integration Specialist stack: FastAPI, Django, Python, Node.js, GraphQL DevOps: AWS, DigitalOcean, Kubernetes, Docker From App Developer with AI builds to full stack developer delivery — our team covers SaaS Sales-ready products end to end.

Are you struggling to get traffic, attract buyers, or turn visitors into paying customers? That's exactly the problem I solve. With 10+ years of experience building high-converting Shopify stores, Wix websites, and Etsy shops, I don't just build pretty pages I build systems that drive real sales and sustainable growth for business owners who are hungry to scale. ⭐ Trusted by clients worldwide with 5-star results: *"Absolutely outstanding work. Exceeded expectations, clean professional store, smooth communication, fast delivery. Easily one of the best I've worked with."* 🛍️ **What I Can Build For You** ✔ Shopify store design, setup, SEO & conversion optimization ✔ Shopify dropshipping stores & sales funnels ✔ Wix website design & Wix Studio development ✔ Etsy shop setup, listing SEO & shop optimization ✔ Landing pages, ecommerce stores & CRO strategies ✔ Responsive design mobile, tablet & desktop ✔ Graphic design: banners, mockups & product visuals 🎯 **Who I Work Best With** Small business owners, product sellers, and entrepreneurs who are serious about growth especially those struggling to get traffic and convert visitors into customers. If you're ready to stop guessing and start selling, I'm your person. 👉 Send me a message or invite me to your job let's build something that actually works

𝗜'𝗺 𝗮 𝘀𝗲𝗻𝗶𝗼𝗿 𝗳𝘂𝗹𝗹-𝘀𝘁𝗮𝗰𝗸 𝗮𝗻𝗱 𝗯𝗮𝗰𝗸𝗲𝗻𝗱 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, 𝘁𝗵𝗶𝗻𝗸 𝗼𝗳 𝗺𝗲 𝗮𝘀 𝘆𝗼𝘂𝗿 𝗴𝗼-𝘁𝗼 𝗽𝗿𝗼𝗯𝗹𝗲𝗺 𝘀𝗼𝗹𝘃𝗲𝗿 𝗳𝗼𝗿 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲, 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲, 𝗮𝗻𝗱 𝗺𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 𝘀𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗳𝗿𝗼𝗺 𝗶𝗱𝗲𝗮 𝘁𝗼 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻. With 8+ years of experience, I help teams ship faster, avoid roadblocks, and turn complex SaaS platforms, API-first backends, enterprise dashboards, and cloud-native services into working realities. 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React.js, TypeScript, Next.js, Redux, TailwindCSS, Vue.js 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Node.js, Python, Django, Java, Microservices, Express.js, NestJS 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: PostgreSQL, MongoDB, MySQL, Redis Firebase 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬: AWS, EC2, Lambda, S3, RDS, GCP, Azure, Docker, Kubernetes, CI/CD, GitHub 𝐀𝐏𝐈𝐬 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: REST, GraphQL, WebSockets, Third-Party APIs, gRPC 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞: - I solve real problems with scalable web apps, automation, and AI/ML integrations - I own delivery, from first commit to production deployment - I ship fast, maintain clean code, and design systems that scale - I integrate cloud, APIs, microservices, and serverless architectures - I improve performance, security, and maintainability in every project 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐖𝐢𝐭𝐡:: - Full-stack SaaS apps, dashboards, and MVPs - Backend systems: APIs, microservices, authentication, RBAC - Cloud & DevOps: AWS, serverless, Docker, Kubernetes, CI/CD - AI & ML features: Chatbots, LLMs, CV, Predictive Models - Automation & workflow orchestration: Scraping, bots, API integrations 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐂𝐚𝐧 𝐄𝐱𝐩𝐞𝐜𝐭: - Clear communication and structured delivery - Clean, maintainable architecture and codebase - Fast problem-solving with technical ownership - Scalable systems ready for enterprise or SaaS growth

Need a senior architect who can build it, scale it, and make it beautiful, with AI woven through the whole thing instead of bolted on the side? That's what I do. I'm a principal full-stack architect and polyglot engineer, 15+ years taking products from idea to production across fintech, health-tech, cybersecurity, blockchain, defense, and AI. $500K+ earned, 6,000+ hours, 5.0 rating. I run Claude Code as my daily execution layer, which is how I ship in weeks what used to take quarters, without the quality dropping. 💡 Work clients know me for: - A $500M real-time fintech trading platform (web + mobile) - A $100M real estate CRM built from scratch; the firm was acquired by Cushman & Wakefield - Solana indexing infrastructure handling $1–3T in daily transaction volume - A live algorithmic quant trading platform running real money on a tier-1 broker - Federated-learning threat detection for an AI cybersecurity platform - Solo-replaced a 10-developer offshore team on a national assistive-communication app 🤖 AI / LLM, where much of my recent work lives: - Production LLM systems with structured outputs, guardrails, and audit logging in regulated fintech - Multi-model pipelines (Claude, Whisper, Gemini, OpenAI, ElevenLabs) chosen deliberately for cost, latency, and accuracy - MCP and agentic tooling, with official Anthropic certifications behind it - A production AI agent and grounded voice-and-chat assistant on frontier models (Gemini, Claude, GPT), with real tool-calling into live equipment data, RAG over the actual manuals, a scorer, and an adversarial grounding eval harness that gates every deploy so it cannot hallucinate to users - Architecting specialized-model training on proprietary field data: fine-tuning small open models (Llama/Qwen) for domain tasks like fault diagnosis and failure prediction, with labeled eval sets and an eval-gated deploy pipeline - The discipline that keeps AI output reliable and affordable in production, not just impressive in a demo 🛠 Stack: - Full-stack: TypeScript/React/Next.js, Node/Deno, Python, Go, Rust, Ruby/Rails, PHP/Laravel - Mobile: Flutter, React Native, Swift, Kotlin - APIs & data: GraphQL, REST, PostgreSQL, MySQL, MongoDB, Redis - Cloud & infra: AWS, GCP, Supabase, Docker/K8s, CI/CD - AI: Claude, Gemini, GPT, MCP, multi-model orchestration - Security: PCI DSS remediation, federated learning, RLS/RBAC, signed webhooks 🎯 Clients hire me when: - They're launching something ambitious and want it architected right the first time - Their legacy codebase is a mess and they need someone who can inherit it and stabilize it fast - They want AI built into the product correctly, by someone who's shipped it in production - They want someone who thinks like an engineer, a strategist, and a founder I also direct and design large-scale sculptures and immersive environments. Fluent in product vision, UX/UI, and creative direction, with experience in Rhino3D, Unity, CAD, TouchDesigner, and Adobe. Request my design portfolio directly if you're curious. 📩 Message me and tell me what you're building. I'll tell you how I'd make it better.

🔝Top 1% Expert-Vetted ⭐️ Over $446K earned over 133 different contracts on Upwork I help companies develop data-driven solutions to solve their toughest business challenges. I create robust data scraping & data science programs to help my clients capture leads, monitor prices, identify patterns, make important decisions, and more. Over the past several years, I have worked with dozens of Enterprise clients such as Amazon, Chegg, Spring (formerly TeeSpring), and more. Taking a data-focused approach helps businesses large and small reach new heights. In order for me to help your business grow, I offer the full circle of data-related tasks: 1. Data scraping & extracting - web scraping and extracting unstructured data from internet or APIs 2. Data processing - clean and engineer data to be in the format you need 3. Data loading - store structured data into external source (SQL, S3, Excel, Parquet, Snowflake, etc) 4. Data science - apply state-of-the-art machine learning algorithms to generate high-value insights I combine the many facets of data work into a unified approach, allowing my clients to get clean, organized data that is ready to power their growing business needs. Through my structured approach to generating data-driven solutions, I turn client projects into long-lasting, big-impact work. I can write complex data scraping programs to extract thousands of gigabytes of data. The data scraping software can be combined with other data streams to be fed into data loading and machine learning phases. To realize this return on investment as swiftly as possible, I utilize my large codebase of frameworks and tools to develop time-tested industry-grade solutions. Data is the new gold - let me do the heavy data scraping and data science for you. If it sounds like we may be a good fit, please feel free to message me directly and I would love to chat with you about what you are working on and how I can add the most value. Thank you!