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👋 Hi there, I'm Yevhen! Need a secure Fintech developer Platform, a robust Springboot backend, or a full stack web developer to take ownership of your product from architecture to deployment? I'm a Top Rated Plus full stack web developer expert, a Java springboot backend developer and Springboot backend developer, as well as a fintech web developer and backend developer for Fintech developer products who designs, builds, and scales every API, service, and integration to drive performance, security, and revenue growth. With 9+ years in Fintech software development, 40+ Fintech projects delivered, and deep expertise in Java and Springboot backend architecture, I turn complex financial requirements into secure, scalable, full stack solutions. Clients have recorded 10x transaction volume scaling, PCI-compliant payment integrations, and 99.9% uptime after my backend developer work on their fintech developer platforms. 🏆 Why Our Fintech & Java Springboot Backend Solutions Stand Out Full stack web developer with 9+ years working as a Java springboot backend developer 40+ custom Fintech developer platforms, APIs, and Springboot backend systems delivered Payment integrations (Interac, Plaid, EFT) built for Fintech companies across 15+ countries Spring Boot microservices architecture cutting response times 40% Java backend developer expertise scaling transaction volume 10x Full stack web developer builds reducing deployment time 50% Fintech-grade security (PCI DSS, SOC2) increasing client trust 35% Backend developer risk-intelligence APIs improving fraud detection 45% AWS-integrated Spring Boot deployments improving system reliability 30% 🚀 Fintech & Java Backend Services 📌 Java & Springboot Backend Development – Secure & Scalable Spring Boot microservices for payment processing and banking APIs Java backend developer expertise in REST API design and system architecture Full stack web developer integration between Java springboot backend and modern frontends 📌 Fintech Platform & Payment Integration Interac, Plaid, and EFT banking integrations for Fintech developer SaaS platforms Custom fintech APIs reducing settlement times 35% Full stack web developer support for compliance-heavy financial products 📌 Full Stack Web Development – End-to-End Ownership Full stack web developer delivering React/Angular frontends on a Java springboot backend Backend developer expertise in database design, caching, and scaling Java and Springboot backend deployed via AWS serverless architecture 📌 Ongoing Backend & API Maintenance Backend developer support for legacy Java systems and Spring Boot upgrades Quick fixes, API integrations, and performance audits within 24h Fintech developer platform monitoring and incident response 🔧 Workflow, Tech-Stack & Extra Value Discovery & Architecture Planning, requirements analysis for Fintech clients, defining scalable Java backend and Spring Boot service boundaries. Development & Integration, Java 17+, Springboot, Spring Security, Hibernate/JPA, PostgreSQL, Kafka, Docker, Kubernetes, AWS. I work as a full stack web developer and Java springboot backend developer, delivering fintech-grade REST APIs, banking integrations, and backend developer solutions for SaaS platforms. Testing & QA, unit and integration testing, load testing for high-transaction developer Fintech systems, security audits for Springboot services. Launch & Scaling, CI/CD pipelines, AWS deployment, post-launch monitoring; backend developer tweak cycles improve system throughput by up to 40%. Recent win, for an existing developer Fintech platform, I delivered a Java backend developer migration to Spring Boot microservices that scaled transaction volume 10x while cutting infrastructure costs 30%. Across recent full stack web developer projects, Spring Boot services handled 40+ REST APIs for real-time risk intelligence, and Java backend systems supported developer Fintech clients scaling to millions of transactions monthly. 💡 Data-Backed Results at a Glance ✅ 10x transaction volume scaling via Spring Boot microservices ✅ 40+ REST APIs delivered as a Java backend developer ✅ 35% faster settlement times for developer Fintech payment platforms ✅ 50% faster deployments through full stack web developer automation ✅ 30% infrastructure cost savings after Spring Boot & AWS migration HTML structures my pages. JavaScript adds interactivity. React powers my UI. Node.js runs my server. Angular builds my app. CSS styles my layout. I script in Python. MySQL stores my data. I use API Integration. API endpoints serve data. SQL queries my database. HTML5 structures content. CSS 3 styles design. jQuery adds effects. Java powers logic. I build with Spring Boot. I use Spring Framework. I use Microservice design. I build RESTful API. Docker deploys apps. 🚀 Let's build a fintech backend that scales! 📞 Ready for a Java backend developer to elevate your platform from architecture to production?

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

𝐒𝐞𝐧𝐢𝐨𝐫 .𝐍𝐄𝐓 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝐀𝐒𝐏.𝐍𝐄𝐓 𝐂𝐨𝐫𝐞 · 𝐀𝐳𝐮𝐫𝐞 · 𝐒𝐚𝐚𝐒 · 𝐌𝐢𝐜𝐫𝐨𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬 · 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 If you need a .NET system that actually scales, not just one that works today, you're in the right place. I help startups and enterprises design, build, and modernize web applications, cloud platforms, and APIs using C#, ASP.NET Core, and Microsoft Azure, with 11 years of experience turning complex business problems into clean, maintainable software. 𝐖𝐡𝐚𝐭 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐮𝐬𝐮𝐚𝐥𝐥𝐲 𝐜𝐨𝐦𝐞 𝐭𝐨 𝐦𝐞 𝐰𝐢𝐭𝐡: A legacy .NET Framework or MVC app that needs modernization to .NET 8/9 or Azure A SaaS product idea that needs to be architected from scratch with multi-tenancy, auth, and scalable APIs A backend that's slowing under load and needs refactoring, query optimization, or cloud migration A DevOps bottleneck, no CI/CD pipeline, manual deployments, fragile release process An enterprise integration project, third-party APIs, payment gateways, ERP connectors, or real-time data workflows 𝐈'𝐯𝐞 𝐬𝐨𝐥𝐯𝐞𝐝 𝐚𝐥𝐥 𝐨𝐟 𝐭𝐡𝐞𝐬𝐞. 𝐇𝐞𝐫𝐞'𝐬 𝐡𝐨𝐰 𝐈 𝐰𝐨𝐫𝐤: --𝐁𝐚𝐜𝐤-𝐄𝐧𝐝 & 𝐀𝐏𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧 C#, ASP.NET Core (2.0–9.0), Web API, gRPC, SignalR, Blazor Server and WASM, clean architecture, CQRS, repository pattern, microservices, I don't just write code, I design systems that are easy to extend six months later. --𝐂𝐥𝐨𝐮𝐝 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞, 𝐀𝐳𝐮𝐫𝐞 & 𝐀𝐖𝐒 Azure App Services, Functions, Logic Apps, Service Bus, Key Vault, Blob Storage, Azure SQL, Cosmos DB. AWS: EC2, S3, RDS, Lambda. I design cloud-native architectures that are cost-aware, secure, and production-ready from day one. --𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐂𝐈/𝐂𝐃 Azure DevOps, GitHub Actions, GitLab CI/CD, Jenkins, Bitbucket Pipelines, Docker, Kubernetes. I set up automated build and release pipelines so your team ships faster with fewer surprises. Front-End Angular (v2–v19), React.js, TypeScript, Tailwind CSS, Material UI, Bootstrap, full-stack delivery when your project needs it. Databases SQL Server, Azure SQL, PostgreSQL, MySQL, MongoDB, Cosmos DB, Entity Framework Core (6/7/8), stored procedures, query optimization. I've rescued databases drowning in N+1 queries and missing indexes. Integrations & Security REST APIs, OAuth2, JWT, SSO, Stripe, PayPal, Authorize.Net, SendGrid, Twilio, WebSockets, OpenAPI/Swagger. --𝐀𝐈-𝐀𝐬𝐬𝐢𝐬𝐭𝐞𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 I integrate AI APIs and LLM-powered features into .NET applications ,from OpenAI-based document processing to intelligent automation workflows, helping you ship smarter products without building an ML team. 𝐖𝐡𝐚𝐭 𝐦𝐚𝐤𝐞𝐬 𝐦𝐞 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭 𝐟𝐫𝐨𝐦 𝐨𝐭𝐡𝐞𝐫 .𝐍𝐄𝐓 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤: I've led development teams, architected systems from greenfield to enterprise scale, and mentored junior developers across startup and Fortune 500 environments. I don't disappear after handing over code,, I think about long-term maintainability, onboarding cost, and your next developer's experience. I communicate clearly, give proactive updates, flag risks early, and deliver on time. I've worked across healthcare, fintech, residential management, and enterprise SaaS, I understand that your software isn't just a technical project, it's a business product. 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐬𝐞𝐫𝐯𝐞𝐝: Healthcare · Fintech/Payments · Residential & Property Management · Enterprise SaaS · E-commerce · Internal Tooling 𝐄𝐧𝐠𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐦𝐨𝐝𝐞𝐥𝐬: Long-term retainer · Project-based · Team augmentation · Project rescue · Architecture consulting 𝑳𝒆𝒕'𝒔 𝒕𝒂𝒍𝒌 𝒊𝒇 𝒚𝒐𝒖 𝒏𝒆𝒆𝒅 𝒂 𝒔𝒆𝒏𝒊𝒐𝒓 .𝑵𝑬𝑻 𝒆𝒏𝒈𝒊𝒏𝒆𝒆𝒓 𝒘𝒉𝒐 𝒃𝒓𝒊𝒏𝒈𝒔 𝒃𝒐𝒕𝒉 𝒕𝒆𝒄𝒉𝒏𝒊𝒄𝒂𝒍 𝒅𝒆𝒑𝒕𝒉 𝒂𝒏𝒅 𝒃𝒖𝒔𝒊𝒏𝒆𝒔𝒔 𝒕𝒉𝒊𝒏𝒌𝒊𝒏𝒈 𝒕𝒐 𝒚𝒐𝒖𝒓 𝒑𝒓𝒐𝒋𝒆𝒄𝒕.

As a Full Stack AI developer and Technical Project Manager. I build AI systems that hold up in production. I build production-ready AI agents and automation systems that integrate safely into your business workflows. Unlike standard AI integrations, my work is grounded in spec-first design and rigorous testing (470+ tests on financial logic) to ensure reliability. I specialize in turning complex LLM capabilities into deterministic, safe tools for operations, data analysis, and customer support. What sets my AI work apart is that I treat the model as one component in a system, not the whole system. The LLM proposes, deterministic code decides. That is how I build agents that can take real action without acting dangerously. 💡 What I build ⬡ AI agents and multi-agent systems with CrewAI, AutoGen, LangGraph, and LangChain that coordinate real tasks end to end ⬡ RAG pipelines with LlamaIndex, FAISS, pgvector, and sentence embeddings that ground LLMs in your own knowledge base ⬡ LLM-in-the-loop systems with hard safety boundaries, where a deterministic rule engine authorizes every action the model proposes ⬡ MCP servers that expose your tools to Claude and other agents natively over JSON-RPC ⬡ Workflow automation with n8n, Zapier, and Playwright browser automation that runs unattended with real error handling and retries ⬡ Production APIs in FastAPI, Django, and Flask, and full-stack apps in React 19 and Next.js ⬡ Provider-agnostic LLM integration across OpenAI, Anthropic, Google, Groq, Mistral, and local Ollama models behind one interface 🛠️ Selected work orch, an open-source CLI published to npm that routes prompts across multiple AI coding agents through a single interface, with budget-aware selection learned from real quota and rate-limit failures A human-in-the-loop review service for AI-authored documents: a containerized HTTP API plus an MCP server exposing 20 review tools, deployed multi-user behind OAuth An LLM trading research bot on the Binance test network, where the model reasons over market data through read-only tools and a deterministic risk engine is the only path to an order, verified live and backed by roughly 470 tests A full job-application platform: a FastAPI agent service that scouts, scores, and tailors applications across six sources, with a provider-agnostic LLM layer and Playwright auto-apply, fronted by a Next.js dashboard An autonomous server-maintenance agent packaged in Docker, and a Chrome extension that fills web forms from your own documents using a pluggable local-or-cloud AI layer 🧠 Background and research Generative AI, University Texas at Dallas. My dissertation studies whether large language models actually know what they do not know, probing model calibration and hallucination at knowledge boundaries. I also write about LLM reliability on my engineering blog. Before that I spent years in production software and contact-center systems integration with tools like Cisco Finesse, ActiveMQ, and Jira automation, so I am comfortable both building greenfield AI products and working inside existing enterprise systems. 🛠️ Core stack Languages: Python, TypeScript, Go, JavaScript AI: LangChain, LangGraph, CrewAI, AutoGen, LlamaIndex, MCP, OpenAI API, Anthropic API, Gemini, Groq, Ollama, RAG, PyTorch, Hugging Face Back-end: FastAPI, Django, Flask, NestJS, Node.js Front-end: React 19, Next.js, TypeScript, Tailwind Data: PostgreSQL, SQLite, FAISS, pgvector, Redis, Firebase Infrastructure: Docker, Docker Compose, GitHub Actions, CI/CD, Nginx, VPS deployment If you need an LLM agent, a multi-agent system, a RAG pipeline, or a full-stack AI product built by someone who cares whether it still works next month, send me a message and tell me what you are building. I will tell you honestly whether I am the right fit. Keywords: AI Engineer, LLM Developer, AI Agent Development, Multi-Agent Systems, RAG Systems, LangChain, LangGraph, CrewAI, AutoGen, LlamaIndex, MCP, Model Context Protocol, OpenAI API, Anthropic Claude, Python Developer, FastAPI, Django, Next.js, React, TypeScript, LLM Integration, Prompt Engineering, Vector Databases, Workflow Automation, Playwright, Generative AI, Machine Learning, Ollama, AI Automation, AWS, AWS ECS/ECR, Amazon Web Services, AI Agent, Digital Project Management, Technical Project Manager, Front-end Development, Back-end Development, Versal

✅ 𝗠𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝟳-𝟴 𝗳𝗶𝗴𝘂𝗿𝗲 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗲𝘀 & 𝗦𝗮𝗮𝗦 𝗰𝗹𝗶𝗲𝗻𝘁𝘀/𝗮𝗽𝗽𝘀 𝗮𝗰𝗾𝘂𝗶𝗿𝗲𝗱. ✅ 𝟳𝟱+ 𝗮𝗽𝗽𝘀 𝗯𝘂𝗶𝗹𝘁. 𝟭𝟭+ 𝘆𝗲𝗮𝗿𝘀 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲. ✅ 𝗔𝗰𝗰𝘂𝗿𝗮𝘁𝗲 & 𝗴𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲𝗱 𝗾𝘂𝗼𝘁𝗲𝘀 𝘄𝗶𝘁𝗵 𝟯𝟬-𝟰𝟬% 𝗹𝗼𝘄𝗲𝗿 𝗰𝗼𝘀𝘁𝘀 𝗮𝗻𝗱 𝗱𝗲𝘃 𝘁𝗶𝗺𝗲𝘀 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗽𝗿𝗼𝗽𝗿𝗶𝗲𝘁𝗮𝗿𝘆 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸 𝘂𝘀𝗲(prebuilt-SaaS code). ✅ 𝗣𝗵𝗲𝗻𝗼𝗺𝗲𝗻𝗮𝗹 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝘀𝗸𝗶𝗹𝗹𝘀. 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝘁 𝗱𝗲𝘃 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝗳𝗼𝗹𝗹𝗼𝘄𝗲𝗱 𝗯𝘂𝗶𝗹𝘁 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗼𝘁𝗵𝗲𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗲𝘀. ✅ 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀, 𝗲𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲-𝗿𝗲𝗮𝗱𝘆 𝗳𝗿𝗼𝗺 𝗹𝗮𝘂𝗻𝗰𝗵. ✅ 𝗨𝗦 𝗰𝗹𝗶𝗲𝗻𝘁 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝘁𝘆. Hi, I’m Andrew! I specialize in delivering polished SaaS apps consistently focused on earning revenue. 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗮𝗻𝗱 𝗶𝗳 𝘁𝗵𝗲𝗿𝗲’𝘀 𝗮 𝗹𝗶𝗸𝗲𝗹𝗶𝗵𝗼𝗼𝗱 𝗼𝗳 𝗮 𝗴𝗼𝗼𝗱 𝗳𝗶𝘁 𝘁𝗼 𝘄𝗼𝗿𝗸 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿, 𝗜’𝗹𝗹 𝗶𝗻𝘃𝗶𝘁𝗲 𝘆𝗼𝘂 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮 𝗰𝗼𝗺𝗽𝗹𝗶𝗺𝗲𝗻𝘁𝗮𝗿𝘆 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿. 🗣 𝗝𝗼𝗵𝗻 𝗠𝘂𝗹𝗹𝗲𝗻𝗵𝗼𝗹𝘇 - 𝗛𝗲𝗮𝗱 𝗼𝗳 𝗦𝗮𝗹𝗲𝘀, 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 - 𝗨𝗯𝗲𝗿 𝗘𝗮𝘁𝘀 ❝ Andrew is the most skilled freelancer and developer I have ever worked with, and I have worked with a lot. He was able to take very broad ideas and turn them into actionable insights and plans in a way I could never imagine was possible. Andrew is the best possible thing to happen to our business and the definition of a true professional. I could not recommend him enough. Anyone who has the opportunity to work with Andrew should consider themselves extremely lucky. ❞ I excel at expertly guiding the app dev process to max out your revenue-earning potential in contrast to your costs, and to steer you away from common SaaS app pitfalls. Client Outcome Examples: ⚡ amzalert.com (8-Figure Acquisition - Rebuilt In 4 Months) ⚡ launchcontrol.us (8-Figure Annual Recurring Revenue - ARR) ⚡ GuestBan.com (Concept-To-Live in 5 Months - 1M+ Monthly App Checkins) My support is based on hard-won successes built through more than a decade of SaaS app obsession. Most of my clients are: ☑️ Existing Businesses - Post-revenue ☑️ Solopreneurs & Small Teams - Wanting to build an MVP app ☑️ Funded Startups - Focused on turning funding into MRR ☑️ Existing Early Stage SaaS - Want to rebuild and scale up I’m the founder of a small, hand-picked team of talented humans. I’m personally involved in all projects, and we only employ senior developers and native English speakers from the US for project management and communication. My team and I are able to consistently reduce dev costs by about 30-40% by leveraging pre-built development frameworks for common app experiences like the user login or checkout, for example, while reserving valuable dev hours for truly custom functionality. Every project we build delivers: 📱Cross Device Compatibility - Desktop - Mobile - Tablet 📈 App Speed Optimization 🧩 Scaleable - Cost-Effective Feature Addition Potential 🛡️ Security 📊 User Analytics & Internal Dashboards 🌐 Multi-Language Localization 🤖 Quality Assurance - QA 📜 Paid User Subscription, Billing & Renewal Management Thanks for taking the time to learn more about me. Invite me to your project or send me a direct message if you’re interested in working together. Talk soon! Andrew Mace - Founder - Lean Engineering Highlights of the work I have extensive experience in includes: SaaS MVP • AI Automation • No-Code/Low-Code • Process Automation • RPA • .NET 8 • Python • AWS • Azure • Docker • Serverless • OpenAI / ChatGPT • Generative AI • Zapier • Make.com • UiPath • Power Automate • n8n • Bubble • Airtable • Stripe • PayPal • Twilio • Slack • Teams • REST APIs • Webhooks • SQL • PostgreSQL • Redis • Power BI • KPI Dashboards • ETL • Airflow • Real-Time Chat • Push Notifications • Subscription Billing • CRM Integration • Lead Generation Bots • Data Analytics • Digital Transformation • Workflow Automation • Rapid Prototyping

𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 | 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 | 𝟭𝟯+ 𝗬𝗲𝗮𝗿𝘀 | 𝟴,𝟬𝟬𝟬+ 𝗨𝗽𝘄𝗼𝗿𝗸 𝗛𝗼𝘂𝗿𝘀 | $𝟮𝟬𝟬𝗞+ 𝗘𝗮𝗿𝗻𝗲𝗱 | I'm a senior .NET / C# developer and Azure cloud architect who builds and scales production systems for companies that can't afford downtime or rework — healthcare platforms, fintech products, e-commerce systems, and real estate/property-management software. If your project needs more than someone who writes code to spec — if you need someone who can architect the solution, own the delivery, and still be there for support six months later — that's the role I take on. WHAT I BUILD ──────────────────────── ✦ SaaS Platforms — multi-tenant, subscription-based .NET Core / Azure applications built to scale from a handful of users to enterprise volume ✦ Healthcare Systems — HIPAA-aware EHR/EMR platforms, HL7/FHIR integrations, and clinical workflow tools built to compliance standards ✦ Fintech & Payments — secure transaction processing, Stripe/PayPal integrations, reporting and reconciliation systems, PCI-conscious architecture ✦ E-Commerce Platforms — custom storefronts, order/inventory management, and integrations with payment gateways, CRMs, and ERPs ✦ Real Estate & Property Management Systems — listing platforms, tenant/lease management tools, and workflow automation for property teams ✦ AI-Powered Features — OpenAI/LLM integrations, intelligent document processing, and AI-assisted workflows added to existing .NET applications ✦ Legacy Modernization — turning outdated ASP.NET/VB.NET systems into maintainable, cloud-ready .NET 8 platforms without breaking what already works TECH STACK ──────────────────────── + Backend: C# · .NET 8 / .NET Core · ASP.NET Core · ASP.NET MVC · Web API · Entity Framework Core · LINQ · Blazor · SignalR · Microservices · REST & SOAP APIs + Frontend: Angular · React · TypeScript · JavaScript · HTML5 · CSS3 · Blazor UI + Cloud & DevOps: Microsoft Azure (App Services, Functions, AKS, Service Bus, Key Vault, Azure SQL) · AWS (EC2, Lambda, RDS, S3) · Azure DevOps · GitHub Actions · CI/CD · Docker · Kubernetes · Infrastructure as Code + Databases: SQL Server · PostgreSQL · Cosmos DB · MongoDB · Stored Procedures & Query Optimization for high-volume systems + Integrations: Stripe · PayPal · Twilio · SendGrid · OAuth 2.0 · HL7 · FHIR · CRM/ERP integrations HOW I WORK ──────────────────────── I stay involved from architecture through deployment — writing clean, documented, production-ready code, and communicating progress clearly at every step. I manage scope, timelines, and stakeholder expectations as carefully as I manage the codebase itself. Depending on what your project needs, I can work as a hands-on senior engineer, a solution architect, or a long-term technical lead. I'll tell you honestly, early, if I'm the right fit for what you're building. Send me your project scope and I'll respond within a few hours.