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I help startups, agencies, and service-based businesses build scalable web applications, AI-powered platforms, internal tools, dashboards, automation systems, customer-facing SaaS products, and custom Shopify and WordPress solutions. With 10+ years of full-stack engineering experience, I specialize in React, Next.js, TypeScript, Node.js, NestJS, Python, Supabase, PostgreSQL, MongoDB, AWS, Shopify, WordPress, and modern cloud architecture. I can help businesses in customer service, coaching, ecommerce, data operations, analytics, IT services, and digital product industries with: • Custom Shopify theme development, Shopify app integrations, Shopify store customization, and WordPress website development • AI chatbots, OpenAI integrations, and workflow automation • Customer portals, booking systems, CRM platforms, and support dashboards • Data entry tools, transcription workflows, document processing, and admin systems • Analytics dashboards, reporting tools, data visualization, and API integrations • SaaS platforms, marketplaces, subscription systems, and payment integrations • Internal tools for teams, staff management, order management, and operations • Web applications for 3D, AR/VR, NFT, gaming, and digital asset platforms • Cloud deployment, performance optimization, bug fixing, and long-term maintenance I focus on clean architecture, reliable delivery, scalable systems, and clear communication throughout the project lifecycle.

“Trying to cut dev costs by hiring cheap is like trying to win Le Mans with a flat tire.” – A SaaS Founder Who Learned the Hard Way As you are browsing Upwork, comparing profiles, and filtering through flashy buzzwords, here’s what you’re really looking for: Not just a command line developer — but a strategic partner who understands product, speed, and scale. Hiring the wrong dev? That means technical debt, delayed timelines, and missed market opportunities. But hiring the right one? That’s how MVPs get shipped, systems scale, and startups win. Why Work With Me? (CTO-Turned-SaaS Builder | 5+ Years Leadership) As a former CTO and founder of a fast-scaling SaaS company, I don’t just “write code.” I think like a founder, execute like a senior engineer, and deliver like a growth-obsessed partner. ✅ I own the outcome — whether it's a scrappy MVP, an investor-ready demo, or a rock-solid enterprise platform. ✅ I speak both product and tech, which means no translation layers, no fluff, and no micromanaging required. ✅ I challenge assumptions. If your feature roadmap is bloated, or your architecture is fragile, I’ll tell you. Fast. My Approach to Development Success 🔹 Business-First Thinking – Every feature ties back to revenue, retention, or speed-to-market. 🔹 Rapid Prototyping – Build fast. Test fast. Learn faster. 🔹 Scalable Architecture – Clean, modular codebases ready for growth. 🔹 Transparent Communication – Clear daily/weekly updates with zero guesswork. 🔹 Product-Minded Execution – I’ll challenge ideas, offer UX advice, and look at your app like a real user would. Full-Stack Services I Deliver 📌 MVP Development & Launch Readiness 📌 React.js & Next.js Frontend Systems 📌 Node.js / Express / MongoDB APIs 📌 Stripe, Lemonway, Hubtel Integrations 📌 Admin Panels & CRM Dashboards 📌 Scalable SaaS Architecture 📌 Third-party Integrations & Automation 📌 App Optimization & Refactors 📌 KYC Flows, Auth, Multi-Tenancy, GDPR Compliance 📌 Project Rescue & Tech Debt Reduction Industries I’ve Helped Build In 🧠 AI SaaS Tools 📦 E-commerce SaaS & Marketplaces ⚖️ LegalTech & FinTech Platforms 📞 Voicebot & Call Routing Systems 🏥 Medical & 3D Scan Integration Platforms 🎮 Esports & Tournament Systems 🌍 Equity Crowdfunding & Investor Platforms 🏠 Real Estate CRM & Lead Funnels Why Clients Stick With Me ✅ Founder-Level Thinking – I treat your product like my own ✅ 100% Reliable – You’ll never wonder where your dev went ✅ Startup-Savvy – I know what breaks, what scales, and what matters ✅ No Ego – Just clean, maintainable, production-ready code ✅ Limited Clients – I only take on a few projects to give each my full attention Still comparing devs? Cool — I would too if I were you. But before you go, here’s the truth: most developers code. Few understand why they’re building what they build. If you’re serious about launching a high-impact web app, and want a partner who gets both the product and the code — let’s talk. Limited Availability – Book Early. Let’s turn your vision into reality, together.

Dear Sir or Madam, My name is Oleksandr Prognimak. I have been working as a software developer for 33 years. I have extensive and longstanding experience in the following programming languages, frameworks, libraries, and technologies. Currently, my main focus is on the following IT areas: Java, JEE, Spring, Spring Boot, Angular, HTML5, JavaScript, TypeScript, CSS, SQL, PL/SQL, Docker, JUnit, Mockito, WireMock, Pact io, Maven, Oracle, PostgreSQL, and Azure Cloud. Here is the complete list of my skills: Skills, consulting, and development as a freelancer in the following areas: - Java: JDK 1.1 - 21, JSE, Swing, AWT - JEE: J2EE, JEE5,6,7,8,10 (Servlet, CDI, EJB, JPA, JMX, JMS, JSF) - Spring/Spring Boot: Spring Core, Spring Boot, Spring Test, Spring Data, Spring Integration, Spring Batch, Microservices - Cloud: Azure, AWS - Web Development/UI: Angular 4,7,10,16; Vue.js 2,3; TypeScript, GWT, Vaadin, JSP, JSF (RichFaces, PrimeFaces), HTML4, HTML5, JavaScript, JQuery, AJAX, Struts, Spring MVC - Web Services: SOAP, SOA, RESTful, Rest-API, OpenAPI, Swagger, RestEasy, Jersey, JSE HttpClient - ORM: Hibernate, EclipseLink, Apache OpenJPA - RDBMS/SQL: Oracle, Postgres, MySQL, MS-SQL, SQL, PL/SQL, MS Access, Teradata, H2 - App. Server/Servlet Container: Apache HTTP, Apache Tomcat, JBoss, Wildfly, Websphere, OC4J - XML Processing: AXIS-2, XPath, XSLT, XML Schemas, JAXP, JAXB - Build Tools: ANT, Maven, Gradle, Mojo - Source Code Management: GIT, GitLab, GitHub, Bitbucket, SVN, CVS - Case Tools/UML: Magic Draw, Software Architect, Together, ERWin, RationalRose - Report Tools: Jasper Report, BIRT Reports, Oracle Forms and Reports, Eclipse BI-Reports - Security: Java Security, JSSE, PKI, Websecurity, X509 - Test Tools/Testing: JUnit, TestNG, Cucumber, JBehave, Mockito, WireMock, EasyMock, Spring Test, Pact io, LoadTest, IntegrationTest, CI - MS-Office: VB, VBA, Excel-VBA, Access-VBA - Container Virtualization: Docker, Docker-Compose, Swarm, Kubernetes (K8) - Big Data: Apache Kafka, Zookeeper - Very Old Skills: C, C++, Basic, Pascal I am available immediately. Best regards, Oleksandr Prognimak

I help founders and non-technical companies turn software ideas into real products, technical teams, and scalable engineering foundations. That means more than writing code. I can help define what should be built, how it should be built, who should build it, and what process is needed to get the first real product out. I’m a Senior Full-Stack Developer, Software Architect, and hands-on technical leader from Germany with 15+ years of experience building SaaS platforms, custom CMS solutions, internal tools, dashboards, onboarding flows, integrations, and complete product foundations. Core stack: TypeScript, React, Next.js, Node.js, PostgreSQL/MySQL, GraphQL, AWS, Vercel, Supabase, Docker, CI/CD, and modern AI-assisted development tools. Most software projects do not fail because nobody can write code. They fail because the wrong foundation is built: unclear product direction, fragile architecture, bad hiring, weak processes, messy business logic, poor UX, underestimated integrations, or AI-generated code nobody can maintain. When to Involve Me I am most valuable before major product, team, and technical decisions are locked in. For non-technical founders or companies, one common mistake is hiring a project manager, designer, or developer before understanding what the product actually needs. A PM, designer, or developer can all be useful — but only when the technical foundation, product scope, architecture, and collaboration model are clear. I help you decide: - what should be built first - what can wait - what architecture makes sense - what team roles are actually needed - whether AI-assisted design is enough for the first phase - how to organize development without unnecessary overhead - where AI can save time without creating technical debt What I Can Help With - Building a technical/product department from scratch - Hiring and screening developers, designers, and technical roles - Setting up development processes, code quality standards, CI/CD, and project workflows - SaaS MVPs and production-ready web applications - Custom CMS platforms and content management workflows - Admin panels, dashboards, and internal business tools - Multi-step onboarding forms and complex user flows - CRM, payment, email, analytics, monitoring, and third-party API integrations - Business process automation and workflow software - Next.js/Vercel apps, Supabase-backed MVPs, serverless APIs, and startup infrastructure - AI-assisted product features and AI workflow integration - Technical rescue of unstable or hard-to-maintain applications What You Get - Product and technical leadership, not just ticket execution - Stable architecture that can grow with your product - Clean TypeScript, React, Next.js, and Node.js code future developers can maintain - UX-focused implementation that feels intuitive, reliable, calm, and effortless to use - Complex business logic translated into clear workflows, data models, and maintainable systems - DevOps, CI/CD, deployments, monitoring, analytics, SEO basics, and code-quality automation where needed - AI-assisted visual support for logo concepts, website design direction, UI ideas, copy, SEO, and polished product presentation when useful How I Work With AI I use AI heavily, but as a professional engineering tool — not as a replacement for engineering judgment. AI helps me move faster, explore options, generate boilerplate, improve UI concepts, write tests, and reduce repetitive work. But architecture, UX decisions, code quality, and final implementation stay under my control. I use custom workflows, coding standards, architecture rules, review processes, and multiple refinement passes so the final result stays maintainable and feels like software I would have written myself. Highlights - Built and led the entire tech/product department for a social impact platform in Germany, including hiring, product direction, processes, architecture, infrastructure, and core implementation - Built a complete SMS marketing platform as co-founder and lead engineer, including a custom ORM and automated pipeline from database schema to frontend SDK - Built custom rich text editors and CMS-like systems used by thousands of users - Delivered projects across travel, e-commerce, healthcare, government, social impact, workflow automation, and startup SaaS - Led developers, mentored teams, screened candidates, and introduced better engineering processes Who I Work Best With - You are a founder or non-technical company that needs technical/product leadership - You need help turning a business idea into a real product and technical foundation - You care about quality, UX, maintainability, and long-term scalability - You have workflows, integrations, dashboards, onboarding flows, or business logic that need thoughtful planning - You want AI-assisted speed, but not AI-generated technical debt If you need a hands-on technical partner who can help plan, build, hire, organize, and launch. Thats me.

I'm an AI Engineer & Strategist (PhD in CS) who solves the #1 problem businesses face: 'We’ve spent 6 months building AI, but I still can't tell if it actually works.' Most businesses I work with are stuck with: • Features that look good but fail in production because they lack proprietary, robust logic. • Talented engineering teams who lack the specialized AI capabilities required to build auditable, verifiable systems. • Architecture that works for 10 users but will trigger massive security or cost liabilities when signing your first enterprise client. With 15+ years of experience and having architected 20+ high-stakes AI pipelines, I bridge the gap between complex AI research and agile, production-grade software engineering. I provide the senior technical expertise you need to eliminate repetitive workflows using production-grade, safe, and auditable AI automation and ensure your technology is an asset for your business or your next funding round. Recent work: • For a RegTech SaaS: Built a hybrid RAG pipeline with durable workflow orchestration (Temporal). Result: AI responses with 100% citation provenance for regulated document analysis. • For a wellness startup: Architected a 4-agent LLM coaching system with dynamic 6-layer prompt assembly and emotional intensity mapping. • For a cross-chain DEX: Engineered the backend for trustless atomic swaps between Bitcoin/Lightning and EVM/Starknet ecosystems. • Enterprise identity: Led the research and delivery of the KILT Protocol mainnet, including a Deloitte-partnered KYC integration. My pipelines consistently deliver: ✅ 40–80% reduction in manual work ✅ 99%+ accuracy, even in regulated environments ✅ Hours reclaimed per employee, per week ✅ Measurable ROI within 30–90 days How I help your business: ✅ AI strategy & advanced RAG: I provide the elite technical oversight your team needs to eliminate repetitive manual workflows, build safe AI systems, and ensure your technology is a major asset for your next funding round. ✅ Security and compliance: Deep expertise in building verifiable pipelines, secure cloud data flows, and SOC2-ready architectures. ✅ Engineering leadership: I work directly with your developers, streamline your sprint cycles, and implement CI/CD pipelines that ensure your team ships weekly, not monthly. ✅ Technical due diligence: I ensure your codebase and IP are fully optimized for institutional scrutiny during M&A or venture capital funding rounds. Technical expertise: • AI / LLMOps: Python, Pydantic AI, LangGraph, LangChain, PyTorch, Vector Databases, Graph-RAG, Semantic Search, Prompt Engineering, Model Evaluation, Fine-Tuning, Embeddings. • Backend & cloud infrastructure: TypeScript, SQL, Docker, Kubernetes, Terraform, AWS, Azure, GCP, Distributed Systems, CI/CD. • Automation & enterprise tech: n8n, Document Intelligence (Docling), LegalTech/FinTech compliance automation, Decentralized Identity (DID). I can quickly adapt to your stack and I am always happy to learn new tools. How we can work together: ✅ Technical audit and roadmap: We start with a deep dive into your current stack. I identify friction points in accuracy or scale and provide a written assessment with specific, technical recommendations. ✅ Fractional leadership: I join your Slack/Teams, manage the development cycle, and take ownership of the hard technical decisions so you can focus on growth. ✅ Specific sprints: Need a specific RAG pipeline or smart contract protocol built? I offer fixed-scope engagements for high-priority feature launches. Want to get started? Click the "Invite to Job" button. Tell me about your current stack and what would make our first call a success for you.

I'm senior AI Engineer specializing in production LLM applications, AI Agents, RAG pipelines, MCP servers, workflow automation, and Full-Stack development. I build scalable AI products with Python, FastAPI, React, LangChain, OpenAI, Anthropic, and vector databases. 🟢 AVAILABLE TODAY 06.07 ⚡ Message me "ARCHITECT" - get a free 45-min technical review of your AI architecture, RAG pipeline, or mobile app stack. No pitch. Just honest engineering feedback from someone who's shipped production AI. 🔵 PROVEN RESULTS ◈ AxlCoach - AI Twin for Professional Coaches (live on App Store) AI-powered coaching platform · React Native · Python / FastAPI LLM orchestration · RAG · Voice/Video pipelines (CosyVoice, LatentSync) 70-85% routine questions automated · 2-3× higher engagement Multi-agent system: sport, strength, nutrition, recovery coaches Apple Health, Google Health, Garmin, Whoop, Oura integration ◈ Sfera24 - Multi-Vendor Marketplace (Europe) React / Next.js · TypeScript · Node.js · PostgreSQL Real-time booking · Stripe Connect · 10,000+ monthly bookings Multi-country launch · Clean scalable architecture ◈ Gettask24 - Service Marketplace Two-role system · 5,000+ users · Real-time chat Java / Spring Boot · React · PostgreSQL · Redis Full CI/CD · AWS infrastructure ◈ CryptaCount - Crypto Accounting Platform Python / FastAPI · React / Next.js · PostgreSQL 90+ blockchain networks · DeFi (staking, LPs, lending, bridges) Double-entry accounting · Audit trails · Cost basis (FIFO/LIFO/HIFO) 73 tax jurisdictions · IFRS, DAC8, MiCA, CARF compliance ◈ [NDA] - AI Logistics Dispatch Platform GPS tracking · Route optimization · Driver ETA React Native · Node.js · Google Maps API Real-time fleet management · Production-ready MVP 🟠 WHAT I BUILD → AI Agents & LLM Systems Agentic workflows · RAG pipelines · Vector search LangChain · OpenAI / Anthropic / Gemini Voice/Video generation · Real-time AI pipelines → Full-Stack & Mobile React / Next.js · TypeScript · Python / FastAPI React Native · Flutter · Node.js · Java / Spring Boot → FinTech & Blockchain 90+ blockchain integrations · DeFi · Smart contracts Tax compliance · Audit trails · Multi-jurisdiction reporting → Marketplaces & Booking Multi-vendor · Real-time scheduling · Payments Stripe Connect · Two-role systems · Admin panels → AI-Powered Automation Document processing · Lead qualification Workflow orchestration · Human-in-the-loop approval systems 🟡 TECH STACK Backend: Java / Spring Boot · Python / FastAPI · Node.js · SQLAlchemy Frontend: React / Next.js · TypeScript · Redux · Tailwind CSS Mobile: React Native · Flutter AI/LLM: LangChain · OpenAI · Anthropic · Gemini · CosyVoice · LatentSync · Real-ESRGAN · Hugging Face Databases: PostgreSQL · MySQL · Redis · pgvector Message Queues: RabbitMQ · Kafka · Celery Cloud & DevOps: AWS (EC2/ECS/EKS/S3/RDS/Lambda) · Docker · Kubernetes · Terraform · GitHub Actions · CI/CD Monitoring: Prometheus · Grafana · Sentry