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I'm a 7+ years experienced Senior Full Stack Developer with a strong focus on backend systems and end-to-end architecture. Most of the work I take on involves systems that are already running in production; often with messy code, inconsistent logic, or performance issues. I’m used to stepping into those environments, understanding how things actually work (not just how they were intended), and then restructuring them into something more stable, maintainable, and easier to extend. From an architectural perspective, I work across the full stack — but my strength is in designing backend systems that handle real-world conditions: concurrent traffic, partial failures, and evolving requirements. I’ve worked extensively with microservices-based designs, async processing, and cloud-native setups, where clear service boundaries and predictable data flow matter more than just writing endpoints. More recently, I’ve been integrating AI into backend workflows — building systems that incorporate LLMs, transcription pipelines, and automated data processing. The challenge there isn’t just integration, but making sure these systems behave reliably under production constraints (latency, retries, streaming responses, and cost control). On the frontend side, I’m comfortable building and adjusting interfaces using React or similar frameworks, mainly to ensure the backend and UI work together cleanly and efficiently. If you have an existing system that needs to be cleaned up, scaled, or extended — especially with AI or cloud-based architecture — I can step in and take ownership of both the technical direction and implementation. 🔹 What I Work On ✅Restructuring and stabilizing existing production systems ✅Designing and implementing backend architectures (monolith → microservices) ✅Building and optimizing APIs (Python, Node.js) ✅AI integration (LLMs, transcription, automation pipelines) ✅Async processing (queues, workers, streaming systems) ✅Cloud-based systems (AWS, GCP, containerized deployments) ✅Frontend integration (React, API-driven UI) ✅Performance tuning and reliability improvements 🔹 Example Work 👉 Production System Refactor & Stabilization Stepped into an existing backend with tightly coupled logic and inconsistent behavior. Broke down responsibilities, clarified data flow, and restructured services to improve reliability and maintainability without disrupting live usage. 👉 Microservices & Cloud Migration Helped transition a monolithic backend into a service-based architecture. Defined service boundaries, introduced async communication patterns, and deployed using containerized infrastructure. 👉 AI-Integrated Backend System Built a backend pipeline combining real-time transcription and LLM-based processing. Addressed latency issues through buffering, retry strategies, and controlled request flows to keep the system stable under continuous usage. 👉 Full Stack Feature Delivery Implemented end-to-end features including backend APIs, database design, and frontend integration. Ensured consistency between data models, API contracts, and UI behavior. 💻 Tech Stack Frontend: React.js, Next.js, Vue.js, Tailwnd CSS Backend: FastAPI, Django, Flask, Node.js (Express/Nest.js), Supabase, Firebase AI & Automation: OpenAI API, Claude, LLM-based pipelines, Custom chatbots, task automation Architecture: Microservices, REST APIs, event-driven systems Cloud & DevOps: AWS, GCP, Docker, Kubernetes Databases: PostgreSQL, MongoDB, Redis Need solid system? – Let’s work together 🚀

I HELP BUSINESSES TURN MANUAL, LEGACY OPERATIONS INTO AUTOMATED, AI-POWERED SYSTEMS THAT HOLD UP UNDER REAL PRODUCTION LOAD. I'm a senior software engineer with 15+ years architecting cloud-native solutions across aviation, logistics, and enterprise domains. I've spent my career on systems where downtime isn't an option, and more recently I've layered AI-assisted engineering (Claude Code, Cursor) on top of that foundation to ship faster without sacrificing reliability. My focus today also includes CRM, ERP, and e-commerce automation, connecting the systems businesses already run on so they work together instead of in silos. Career highlights: • Leveraged AI-assisted engineering workflows (Claude Code, Copilot, Cursor) to accelerate feature development and code reviews, increasing team throughput and code quality • Architected and maintain a serverless-first ERP ecosystem on AWS supporting aviation maintenance operations, with zero downtime for mission-critical workflows • Led integrations connecting TRAX to SABRE Operation Control, Coupa, and AeroXchange, streamlining operations across multiple aviation systems • Engineered secure, high-integrity digital workflows that achieved FAA paperless approval for task-control processes • Modernized a legacy e-billing system for a Fortune 500 logistics company, reducing technical debt and improving resilience • Maintained 99%+ uptime on safety-critical aviation microservices while building real-time data access for remote client sites • Reduced security breaches by 25% while migrating a desktop inventory system to a modern web architecture • Consolidated two employees' worth of manual reporting into a single automated data pipeline, eliminating duplicate effort through intelligent workflow design AI & Automation: Claude Code, Cursor, agentic AI design patterns, AI agent integrations - using AI as a force multiplier, not a replacement for engineering judgment Full-Stack Development: React, Angular, TypeScript, Node.js, REST APIs, microservices - end-to-end web application development with a focus on maintainability CRM & Workflow Automation: GoHighLevel, n8n, API integrations, webhooks - connect CRM systems to the rest of your stack so lead flow, follow-ups, and reporting run without manual handoffs E-Commerce & Payments: Shopify, WooCommerce, Stripe, payment gateway integrations, inventory synchronization, order automation - reliable commerce systems that don't need babysitting during peak traffic Cloud & DevOps: AWS (Lambda, EC2, RDS, S3, IAM), CDK/CloudFormation, Azure, Docker, Kubernetes, GitHub Actions, Jenkins - serverless-first, infrastructure-as-code approach Aviation & Logistics: TRAX ERP, SABRE, Coupa, AeroXchange, Oracle, AWS (Lambda, EC2, RDS, S3) - built and maintained mission-critical MRO and eMobility systems for major airlines Enterprise Modernization: Java, Spring Boot, Spring MVC, Angular, Oracle - led cloud-native modernization of legacy enterprise systems, cutting technical debt and improving resilience WHY CLIENTS KEEP ME ON: I've built systems where a bug means grounded aircraft, not just a bad review. That standard doesn't change when I move to SaaS, automation, or AI projects. I communicate clearly, deliver on schedule, and build things designed to still work a year after launch. If you need something built right the first time, let's talk about what you're working on.

I build AI-powered MVPs and automation systems that take founders from idea → launch → first revenue. Delivered AI solutions generating $1.2M+ in additional revenue and 40% cost reduction for enterprise clients across healthcare, finance, and e-commerce. 🌟 100% Job Success | Top-Rated | $100K+ earned | 60+ projects 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: AI & ML: OpenAI (GPT-4), Claude, Gemini, LangChain, RAG, LLAMA, Pinecone, Weaviate Voice & Conversational AI: Vapi, Retell AI, Whisper, ElevenLabs Automation & Workflows: n8n, Make, Zapier, GoHighLevel, custom pipelines Frontend & Mobile: React.js, Next.js, React Native, Tailwind CSS, TypeScript Backend & APIs: Node.js, Express, Python (FastAPI), GraphQL, .NET MVC Databases: PostgreSQL, MongoDB, Prisma Cloud & Hosting: AWS (Lambda, S3), Firebase, Vercel Integrations: Stripe, Twilio, Shopify, Salesforce, TikTok, Walmart, QuickBooks 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝: AI MVPs & Automation 𝐀𝐈 𝐕𝐨𝐢𝐜𝐞 & 𝐂𝐨𝐧𝐯𝐞𝐫𝐬𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐒𝐲𝐬𝐭𝐞𝐦𝐬: 🎙️Voice Agents: Customer support, sales, engagement; multi-prompt logic, contextual awareness 📚RAG & Knowledge Engines: Internal tools, FAQ bots, AI coaching frameworks (10M+ interaction) ⚙️Automation Pipelines: n8n / Make workflows, logistics dispatch, route optimization 📈Scalable MVP Systems: 1,000+ concurrent calls, sub-800ms latency, multilingual support 𝐑𝐚𝐩𝐢𝐝 𝐒𝐚𝐚𝐒 & 𝐌𝐚𝐫𝐤𝐞𝐭𝐩𝐥𝐚𝐜𝐞 𝐀𝐈: 📊Multi-Channel Dashboards: Amazon, Shopify, eBay, TikTok, one place to manage everything ⚡AI-Powered Optimization: Pricing engines, personalization, anomaly detection 💼Workflow & Financial Automation: Accounting, reconciliation, conditional pipelines 𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞 & 𝐌𝐞𝐝𝐢𝐜𝐚𝐥 𝐌𝐕𝐏𝐬: 🛡️HIPAA/SOC2 compliant Telehealth, diagnostic assistants, CBT frameworks 🏥Multi-tenant clinical systems, secure provider collaboration 𝐅𝐢𝐧𝐚𝐧𝐜𝐞 & 𝐓𝐫𝐚𝐝𝐢𝐧𝐠 𝐌𝐕𝐏𝐬 💰Trading platforms, MT5 integration, payment verification 🎨AI-generated content, interactive avatars, voice/video synthesis 💬Real-time messaging platforms handling 100K+ concurrent users 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲: 30-40 hours/week with under 24hrs response to all communications. If you’re a founder looking to validate, launch, or scale an AI MVP without burning months or budget, let’s talk.

✅ 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