Hire the Best Gemini developers

🚀 🥇 Expert-Vetted | Hands-On AI/ML Engineer | I Build LLM Apps, RAG Systems & AI Agents (MCP, LangGraph) | Python, AWS, GCP, Azure | Healthcare & FinTech 👁‍🗨 Overview I build and ship production AI systems myself, end to end. No handoffs, no delegation: I design the architecture, write the code, and stay on it until it is deployed, monitored, and generating ROI. I bring 15+ years of hands-on AI/ML engineering, a PhD in Machine Learning from Iowa State University, and a Master's in Computational Neuroscience from UC San Diego. ✅ What I Build: • LLM Applications: RAG pipelines, chatbots and copilots, document AI, semantic search, structured data extraction • AI Agents: Multi-agent systems, MCP (Model Context Protocol) tool integrations, LangGraph orchestration, function/tool calling, agentic workflow automation • Model Customization: Fine-tuning (LoRA/QLoRA, RLHF/DPO), prompt optimization, evals and guardrails, open-weight model serving (vLLM) • Healthcare AI: Clinical trial automation, medical document generation, HIPAA-compliant systems • Full-Stack AI Products: Python/FastAPI backends, React frontends, Kubernetes, CI/CD across AWS, GCP, Azure 🎯 Recent Hands-On Builds: • Engineered a clinical trial intelligence system for enterprise pharma: ingested, embedded, and indexed 100K+ trials with multi-index, multi-LLM RAG and advanced PDF parsing, powering Q&A, chat, and benchmarking • Built a GenAI product that drafts 100+ page regulatory clinical trial protocols (95% of the full M11 document), with multi-agent validation, consistency, and styling checks • Coded and deployed an ICD-10 billing code prediction model on GCP and an EHR-integrated physician sidebar on AWS EKS • Rescued a failing third-party ML platform, refactored it, and took it to production on AWS at ResMed (NYSE: RMD), enabling their first commercial AI healthcare product • Built ML-powered ad targeting and recommendation systems generating $100K+/month, plus AI products earning $1M+ revenue in year one 💼 Industry Expertise: • Healthcare/Pharma: Clinical trials, EHR API integration, medical AI, FDA-regulated software • FinTech: Real-time fraud detection, card-linked platforms, transactional APIs (MasterCard and Visa partnerships) • Enterprise SaaS and Retail/E-commerce: Multi-tenant APIs, recommendation engines, customer analytics 🔧 Technical Stack: AI/ML: GPT-5, Claude, Gemini, Llama, DeepSeek, Qwen; fine-tuning (LoRA/QLoRA, PEFT, RLHF/DPO); RAG and GraphRAG, hybrid search, rerankers, embeddings Agents: MCP, LangGraph, LangChain, LlamaIndex, CrewAI, OpenAI Agents SDK, structured outputs, tool calling Languages: Python, TypeScript/JavaScript, SQL, Java, Go Frameworks: PyTorch, Hugging Face, FastAPI, React, TensorFlow, Scikit-learn Serving & MLOps: vLLM, Ollama, AWS (SageMaker, Lambda, ECS/EKS), GCP (Vertex AI), Azure AI Foundry, Kubernetes, Docker, MLflow, Weights & Biases Evals & Observability: LangSmith, Langfuse, RAGAS, guardrails, LLM cost optimization Databases: PostgreSQL/pgvector, Pinecone, Qdrant, Weaviate, ChromaDB, Elasticsearch, MongoDB, Redis 📊 Quantifiable Impact: • 100K+ clinical trials processed, indexed, and made queryable for enterprise users • 100+ page medical documents generated with regulatory compliance • 94% accuracy in crisis detection and 73% engagement increase for a nonprofit youth chatbot • 10X subscriber growth driven by models I built and deployed • $100K+/month revenue from ML-powered ad targeting 🎓 Credentials: • PhD, Machine Learning (Iowa State University); M.Sci., Computational Neuroscience (UC San Diego) • IBM Certified: RAG and Agentic AI; Deep Learning Specialization (Coursera) • Published AI/ML researcher (Psychological Science, ICSE); 4 provisional patents in AI/computer vision 🌟 What Sets Me Apart: I am senior, and I still write the code. On every engagement you get one engineer doing the actual work: architecting, coding, testing, deploying, documenting. Because I have built AI in regulated healthcare and fintech environments, compliance, evals, and monitoring are baked in from day one rather than bolted on. My neuroscience background shapes how I build AI systems that genuinely understand human behavior and needs. 🤝 Working With Me: You work directly with me, and I personally do the work. Expect working code early (usually in the first week), frequent demos, clear async communication, and clean documentation at handover. US-based in San Diego (Pacific time), available for both short sprints and long-term builds. Have an AI feature or product that needs to get built? Send me the details and I will reply with exactly how I would build it.

AI Search & AEO are reshaping how customers find and choose businesses. Your prospective clients still use Google, but they are also asking ChatGPT, Gemini, Perplexity, and Google AI Overviews which brands to trust, compare, and hire. I'm José David Hernández Rincón, an AI Search & AEO specialist and Senior SEO Strategist with 12+ years of experience, 389+ completed projects, 20,000+ hours on Upwork, clients in 42 countries, 100% Job Success, and Top Rated Plus status. I help SaaS, eCommerce, local, and multi-location businesses build dominant visibility across both traditional organic search and modern AI-powered search engines. WHAT I DO AI Search, AEO & GEO AI visibility & citation audits · ChatGPT, Gemini, Perplexity & Google AI Overviews optimization · AEO/GEO strategy · Entity & semantic SEO · Conversational search · AI visibility gap analysis · Content architecture for LLM retrieval · Brand mention tracking & optimization. Technical SEO Full-site technical audits · Crawlability & indexation · Site architecture · Core Web Vitals · Schema & structured data · JavaScript SEO · International SEO (hreflang) · Site migrations · Penalty & traffic-loss recovery. Content & On-Page SEO Search-intent mapping · Topical authority architecture · Competitor & content-gap analysis · Content strategy & briefs · Commercial & service page optimization · Internal linking strategies · Semantic optimization for AI and traditional search. Local SEO Google Business Profile optimization · Google Maps ranking · Local landing pages · Multi-location SEO · Citation auditing & NAP consistency · Review acquisition strategy. WHY CLIENTS HIRE ME SEO experience is easy to claim; a 12-year proven track record is harder to fake. I look at your entire search ecosystem before prescribing a solution. A traffic decline might look content-related but stem from technical architecture, indexation issues, or weak semantic entity signals. WHO I WORK WITH SaaS & Technology: Companies competing for high-intent category and problem-based searches. eCommerce & DTC: Brands scaling visibility across commercial, transactional, and AI search results. Local & Multi-Location Businesses: Law firms, real estate, healthcare, hospitality, and professional services. Agencies: Teams needing a senior AI Search, AEO, and SEO strategist to own execution or lead complex client accounts. HOW WE WORK TOGETHER I don't follow generic SEO checklists. I focus on execution that impacts business revenue. Audit → Strategy → Execution → Measurement I analyze your technical foundation, organic visibility, content, competitors, search intent, and AI visibility. Then I create a prioritized roadmap based on business impact. I handle implementation directly or collaborate seamlessly with your developers, writers, designers, and marketing team. Reporting focuses on meaningful outcomes — visibility, qualified traffic, rankings, conversions, authority, and AI citations — rather than vanity metrics. STACK & TOOLS Ahrefs · Semrush · Screaming Frog · Google Search Console · Google Analytics 4 · Google Tag Manager · BrightLocal · DataForSEO · WordPress · Shopify · WooCommerce LATAM & GLOBAL REACH Bilingual strategy in English and Spanish across LATAM, North America, and global markets. International SEO and AI Search require more than translating keywords — search behavior, competition, terminology, and user intent change significantly between markets. Send me a message with: Your website URL Your top 3 competitors The core products, services, or search terms you most want to win I’ll review your search footprint and identify where you are losing visibility and where your strongest AI Search & AEO opportunities lie. If you need someone to follow a simple SEO checklist, I'm probably not the right fit. If you need an experienced strategist who can unify Technical SEO, content, authority, Local SEO, and AI Search into one coherent strategy — let's talk. CASE STUDIES & PROVEN RESULTS SaaS (B2B): Built an AEO & Technical SEO roadmap that resulted in a 280% increase in ChatGPT & Gemini citations and a 45% lift in demo requests within 6 months. eCommerce (Global): Scaled organic search revenue across 3 international regions while establishing first-page presence in Google AI Overviews for high-intent queries. Multi-Location Local Brand: Optimized 15+ Google Business Profiles alongside local entity signals, driving a 190% increase in map views and phone conversions. FREQUENTLY ASKED QUESTIONS What is the difference between traditional SEO and AEO/AI Search? Traditional SEO optimizes for search engine rankings (Google, Bing). AEO (Answer Engine Optimization) and GEO (Generative Engine Optimization) optimize your content, entities, and citations so AI models (ChatGPT, Gemini, Perplexity) directly recommend your business as the trusted solution. Can you work directly with our existing web development team? Yes. I routinely collaborate with internal d

I help businesses turn AI ideas and repetitive workflows into practical products, AI agents, and automation systems. I combine AI Product Management, Prompt Engineering, Claude, n8n/Make, and business analysis to move from problem to MVP, workflow, and measurable outcome. Most production SaaS platforms break under load because automation pipelines and custom architectures are glued together without enterprise-grade durability. I build resilient, full-stack Next.js and AI systems engineered to scale past 100k active users with zero downtime and sub-second API response execution times. Stop wasting 20+ hours per week on repetitive data entry and manual lead routing. I build autonomous AI pipelines using n8n and make and all Vibe Automation tools, that cut your operational costs by 40%. Let’s architect a system that runs while you sleep, guaranteed to ship within 72 hours. AI Prompt Engineering — design, optimize, test, and standardize prompts for reliable production use. LLM Prompt Evaluation & Testing — build test cases, failure scenarios, scoring rubrics, and prompt QA workflows. Custom AI Agents & Workflow Design — design agent instructions, decision logic, tool-use flows, and multi-step AI processes. RAG Prompting & Retrieval Evaluation — improve grounding, source attribution, retrieval quality, hallucination control, and answer reliability. AI System & Prompt Auditing — review existing prompts, agents, or workflows and identify ambiguity, failure modes, context bloat, and reliability issues. AI Skills / System Instructions Development — create reusable instruction systems for Claude, ChatGPT, Cursor, Codex, and agentic workflows. AI Image Prompt Engineering — build structured visual prompt systems for infographics, marketing visuals, educational content, product graphics, and consistent creative directions. Prompt Product & Template Development — turn an AI use case into reusable prompts, templates, examples, instructions, and tested workflows. I design AI Product Manager specializing in AI Agents, Automation, Prompt Engineering, and LLM-powered business systems. Chat GPT | Claude AI | Amazon Bedrock | RAG | LLM Applications | AI Workflows I help businesses turn AI ideas and repetitive processes into practical, structured AI products and workflows. My core work combines AI Product Management with hands-on AI system design, including: • AI Product Strategy & MVP Planning • AI Agents & Agentic Workflows • Prompt Engineering & Prompt Architecture • AI Automation & Business Workflows • RAG & AI Knowledge Systems • LLM Applications & AI Integration • Claude AI & Amazon Bedrock • ChatGPT, Gemini & other generative AI platforms I approach AI from both the product and implementation side: understanding the business problem, defining the AI solution, designing the workflow and prompt architecture, and translating the concept into a practical system that can be tested and improved. My PromptOS work is a strong example of this approach: a structured AI operating system combining prompt libraries, builders, workflows, agents, search, automation, and reusable AI capabilities. I am also Anthropic-certified in Claude with Amazon Bedrock and continue expanding my specialization in Claude, RAG, AI agents, tool use, and production-oriented AI workflows. What I can help you with: → Chat GPT / Prompts Systems / LLM solution design → AI product discovery and MVP definition → AI product requirements and roadmap planning → AI agent and automation workflow design → Prompt systems for business teams → Claude / LLM solution design → RAG and knowledge-assistant concepts → AI workflow optimization → AI-powered content and marketing systems I don't just create prompts or use AI tools. I design the system around the AI so the solution can be structured, repeatable, and aligned with a real business objective. If you're building an AI product, business AI system, I can help you move from idea → product definition → AI architecture → working workflow.

Most AI freelancers hand you a script you cannot ship. Most web developers cannot build the agent in the first place. The gap between those two is where your budget disappears. I build AI agents and the web and mobile apps they live inside - one accountable partner for the model, the API, the interface and the hosting. Production AI delivered for Microsoft. Top Rated on Upwork with 100% Job Success and 5.0 stars on every contract closed. I lead a 25-engineer team, so every build ships with architecture review, QA and DevOps behind it. 1. AI AGENTS AND AUTONOMOUS WORKFLOWS - Multi-agent systems on LangGraph, LangChain and CrewAI: state machines, tool calling, retries and human-in-the-loop approval gates - Per-run token and cost caps, so your LLM bill never surprises you - Agents wired into the tools you already run: HubSpot, Salesforce, Slack, Notion, Gmail, Stripe and internal APIs - Every agent decision logged and traceable from day one 2. VOICE AI AGENTS - Real-time inbound and outbound voice on Twilio, LiveKit and the OpenAI Realtime API - Sub-second response latency with barge-in handling, so the agent never talks over your customer - Deepgram and Whisper transcription, ElevenLabs voice synthesis - Warm transfer to a human, automatic call disposition and full transcripts pushed to your CRM 3. RAG AND LLM SYSTEMS THAT DO NOT HALLUCINATE - Retrieval augmented generation on Pinecone, Weaviate, Qdrant and pgvector with hybrid search and reranking - Chunking and metadata strategy built around your actual document structure - An evaluation harness so you can measure answer accuracy instead of hoping for it - Citations on every answer so your team can verify the source - OpenAI, Anthropic Claude, Gemini and open-weight LLaMA models, fine-tuned only where it earns its cost 4. WEB APP DEVELOPMENT - Next.js, React, TypeScript and TailwindCSS front ends - FastAPI, Node.js and Django back ends on PostgreSQL, Supabase or MongoDB - Multi-tenant SaaS with role-based access, Stripe billing and usage metering - Admin dashboards where you can see, audit and override everything the agent did - Streaming AI responses instead of a loading spinner 5. MOBILE APP DEVELOPMENT - React Native and Flutter for iOS and Android from a single codebase - Offline-first sync, push notifications, in-app purchases and biometric auth - AI features that stay fast on real mobile networks - App Store and Google Play submission handled end to end, review pushback included SHIPPED, NOT PROTOTYPED Docker, CI/CD, AWS, GCP and Vercel. Monitoring, alerting and cost dashboards configured before launch. Clean, tested, documented code your next developer can actually read. SELECTED WORK - ELEVA - AI-native email assistant SaaS built on React, FastAPI and OpenAI - AI voice-call campaign engine with automatic disposition analysis and CRM logging - Document intelligence agent that reads contracts, extracts key terms and flags risks and deadlines - AI sales assistant that listens to live calls, suggests responses and drafts follow-ups in real time - Workflow orchestrator connecting CRM, Slack, Notion and email into one automated pipeline HOW WE WORK Week 0 - Free 30-minute scoping call. You leave with an architecture sketch and a fixed price, whether you hire me or not. Week 1 - A working prototype on your real data or your real call flow. You see it run before committing further. Weeks 2 to 4 - Build, test, iterate. Friday demos and direct Slack access to me. Launch - Deployed, documented and handed over, with 30 days of post-launch support included. WHO I WORK BEST WITH - Funded startups and enterprise teams with builds of 5,000 USD and up - Companies replacing real manual work: call centres, document review, support queues, internal ops - Founders who want one partner owning the agent, the app, the API and the hosting Not a fit: one-off prompt tweaks, unpaid proofs of concept or hourly script patching. Tell me your problem in two sentences. You will get an approach, a timeline and a number back within 4 hours.

Full-Stack Developer | Web & Mobile | AI | The Guy Who Gets It Done Let me be straight with you — I don't just build apps. I build experiences. Digital products that make your business more money, save you time, and leave your competitors wondering what hit them. 5+ years. Hundreds of hours of code. Zero failed deadlines. I'm not here to waste your time, and I'm definitely not here to waste mine. You want results? Good. So do I. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔫 THE ARSENAL ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ AI & LLMs — OpenAI (GPT-4o), Claude, Gemini, LangChain, LlamaIndex, Hugging Face, Pinecone, RAG Pipelines ✅ Mobile — Flutter, Kotlin, Java, Socket. io | iOS & Android ✅ Web — React, Next.js, Angular, Node.js, WordPress | TypeScript, JavaScript, HTML5/CSS3 ✅ UI/UX — Figma, Adobe XD, Photoshop, Illustrator ✅ Payments — Stripe, Razorpay, PayPal ✅ APIs — Node.js/Express.js, Django/Flask, REST & GraphQL ✅ Databases — PostgreSQL, MySQL, MongoDB ✅ Cloud — AWS (S3, EC2, SES, SNS, SQS), Firebase, Heroku ✅ DevOps — Git, GitHub, GitLab, Bitbucket, Docker ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Most developers will ghost you, miss deadlines, and send you code that looks like it was written at 3 am. I'm not most developers. I communicate. I deliver. I close. So if you're serious about your project — message me. Let's get to work.

🏆- TOP RATED PLUS | SEO Specialist | SEO Expert | SEO Optimization | Local SEO ⚡️- FAST Response (within 2 minutes) - Message me, and let's discuss your project right now! 🥇- 50,000+ Keywords Ranked in Top ⭐️- 5 - Star Feedback Across 167+ Projects done on Upwork 🏆- 100% Recommended by Clients 🏆- 8 Years Experience Across: Ecommerce, Services, Brand Promotion, SaaS, Finance, Real Estate, Technology, Manufacturing, B2B, Healthcare, Education, AI, Startups, Automotive, Retail, Luxury Brands and others. 🌎 Global SEO Campaigns + Across the US, Europe, UK, Canada, Australia, the Middle East, Singapore and International Markets. 🏆Certified in Google Analytics 4, Google Search Console, Google Business Profile, Semrush, and more. ⚡️Send me your website for a FREE MANUAL SEO Audit and personalized SEO Optimization strategy, and let's jump on a call! ⚡️ 🚀 Core SEO Expertise & Specializations: - SEO | SEO Expert | SEO Specialist | SEO Consultant | SEO Strategist | Technical SEO Expert | AI SEO Expert | AEO Expert | GEO Expert | Local SEO Expert | Ecommerce SEO Expert | SaaS SEO Expert | Enterprise SEO Consultant | WordPress SEO Expert | Shopify SEO Expert | On-Page SEO | Off-Page SEO | Technical SEO | Link Building | Digital PR | Guest Post Outreach | SEO Audit | Keyword Research | Competitor Analysis | Content Strategy | Entity SEO | Semantic SEO | Topical Authority | E-E-A-T | Schema Markup | Core Web Vitals | Google Search Console | Google Analytics 4 (GA4) | Screaming Frog | Ahrefs | SEMrush 🙋‍♂️Hi, I’m an SEO Expert / SEO Specialist with 8+ years of hands-on experience helping businesses grow through SEO, On-Page SEO, Off-Page SEO, Local SEO, Ecommerce SEO, SaaS SEO, and AI Search Optimization (AEO & GEO). My expertise includes SEO | SEO Optimization, keyword research, content strategy, link building, entity SEO, schema markup, Core Web Vitals, website migrations, Google Analytics 4 (GA4), Google Search Console, competitor analysis, and sustainable white-hat SEO strategies that drive long-term organic growth. 🚀 Send me your website, get a FREE professional SEO audit, and let's jump on a call! 🛠️SEO Paid Tools I Use: - Ahrefs, SEMrush, Google Search Console, Google Analytics 4 (GA4), Screaming Frog, Google Tag Manager, PageSpeed Insights, Google Keyword Planner, Surfer SEO, Frase, Sitebulb, Majestic, Moz Pro, SpyFu, SE Ranking, Serpstat, GTmetrix, Bing Webmaster Tools, ChatGPT, Gemini, Claude, Perplexity, Copilot, Keyword Insights, AnswerThePublic, AlsoAsked, Screaming Frog Log File Analyser. 🔄 I stay up to date with the latest Google Search algorithm updates, AI search advancements, ranking systems, Core Web Vitals, E-E-A-T guidelines, spam policies, and SEO best practices to ensure every strategy aligns with Google's current recommendations. 🎯 I use only proven, white-hat SEO strategies that deliver real, long-term results. Every SEO campaign is tailored to the unique goals, industry, competition, and current state of each project - there are no one-size-fits-all solutions. My focus is on sustainable rankings, qualified organic traffic, leads, and measurable business growth. 🚀 Send me your website, get a FREE professional SEO audit, and let's jump on a call! 💬 What My Clients Say: ⭐️⭐️⭐️⭐️⭐️ “I have worked several years with other SEOs specialist that promised. Taras is, without any doubt , the best SEO professional we have encountered .He is knowledgable , professional and has excelent communication skills. Hire Taras for your SEO project, you wont regret it!" Johanna, Canada —-- ⭐️⭐️⭐️⭐️⭐️ "Taras is highly responsive, proactive, and focused on delivering measurable results. Communication has been excellent throughout the project, with clear explanations, regular updates, and a well-structured approach. Very satisfied with both the quality of work and the progress achieved so far!" Mitch, USA 🏆 Why Clients Choose Me: ✔ Proven SEO strategies with measurable results ✔ Personalized SEO roadmap for every project ✔ White-Hat SEO techniques only ✔ Transparent communication & weekly updates ✔ Fast response and reliable support ✔ Data-driven decisions backed by SEO tools ✔ Long-term organic growth, not quick fixes ✔ Experience across 100+ successful SEO projects ✔ Expertise in SEO, AEO, GEO & AI Search Optimization ✔ Focus on rankings, leads, conversions, and ROI 🚀 Send me your website, get a FREE professional SEO audit, and let's jump on a call! Warm regards SEO | SEO Expert | SEO Specialist Taras Updated 14.09.2026