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I do fixed-cost, goal-oriented projects only. No hourly billing. You need results, I need clear goals. We talk, agree what matters most, split it into steps, review weekly. Two kinds of work. Either you have an idea and nothing built yet, and I build the first real working version and get it live, usually in two to six weeks. Or you already have something half finished, slow or broken, often AI-generated, and I find out what is wrong and get it working properly without shutting your business down. ** How we can work together (fixed rate) ** Architecture audit and tech roadmap: from $1,500. I review what you have, or plan what you want to build, and give you a clear written plan. Ready-to-launch MVP: from $6,000. I take your idea and build a working product ready for your first users or investors. ** A few results ** Built the first version of the backend for a trading marketplace that now moves about 1.5 billion dollars a year. Seven years later the CTO asked me back to help it scale. Built a sales tool together with its CEO that went from zero to 40,000 dollars a month within three months of launch. Built a tool for doctors that handles patient health records under HIPAA rules, on my own, start to finish: servers, admin area, email automation, and the sites doctors and patients use. Co-founded a software marketplace worth 20 million dollars at its peak and ran the technical side. Fifth engineer at a hosting company that grew to 15 million users. ** What I build ** Software products, internal tools that replace slow manual work, and iOS and Android apps with React Native. Recent work spans healthcare, education, online stores, and US sports pool apps like pick em and squares. ** Stack ** Full stack TypeScript: Node.js, React, Next.js, React Native. PostgreSQL, MongoDB, Redis. AWS hands-on for 10+ years, from bare metal to Kubernetes and serverless. AI built into features (OpenAI, Claude, Gemini, custom agents, RAG) and into how I deliver, always with tests and guardrails so speed never costs quality. ** Experience ** Top 3% network at Toptal since 2016. 15+ years delivering for founders, from zero to companies running at billions per year. Master's degree in Physics. I keep communication clear and direct, and I ask the same of you. If you have something you want built, or something built badly you want fixed, send me a message and tell me about it.

For the past 2 years, I’ve worked hands-on with OpenAI’s API since the release of GPT-3.5, serving as the Lead Developer and Solution Architect for EdTech startups and agencies. The small and medium enterprises I’ve worked with wanted solid ROI on their GenAI investments, and I was there to make that a reality by implementing custom AI solutions tailored to their unique needs. Imagine scaling your business effortlessly with AI-driven tools that cut costs, automate workflows, and unlock new growth opportunities. My work has helped businesses not only maximize profit margins and boost productivity but also expand their potential for greater impact and innovation. For example: - I developed an AI-powered chat assistant that reduced tutoring costs by 70% for an EdTech startup while improving student engagement. - I implemented an AI-driven CMS for a STEM learning company, boosting tutor productivity by 12% and cutting administrative workload. - I created a GPT-powered agentic workflow automation system that decreased AI response error rates by 3x and reduced operational workload by 10-30% for an EdTech startup. HERE’S HOW I INTEGRATE GEN AI: 💡 OpenAI Technologies I specialize in leveraging OpenAI’s suite of advanced models, including GPT-4, o1-preview, and Whisper, to create intelligent features like conversational AI, transcription, and complex task automation. These tools are tailored to deliver exceptional results that align with your business goals. 💻 Full-Stack Development I handle every stage of development—from initial planning and coding to deployment. With expertise in front-end technologies and a focus on building scalable back-end systems using AWS, I ensure seamless integration of AI into your workflows. ☁️ AWS Solutions For robust and secure back-end systems, I utilize AWS’s scalable infrastructure, focusing on serverless architecture to deliver cost-effective, high-performance solutions that grow with your business. 💬 Let’s connect and explore how we can turn your ideas into scalable, profitable solutions that take your business to the next level. 💼 See my previous work and projects in my PORTFOLIO: augustinastech.com

Greetings! I am an ISTQB Certified seasoned Senior Software Quality Assurance Engineer with over 7 years of hands-on experience specializing in Selenium and Cypress Automation Testing. I thrive on solving critical problems and am dedicated to delivering high-quality solutions for clients. As an SQA Engineer, I excel in both manual and automated testing for diverse web and mobile applications. My expertise includes developing and executing test cases within Agile frameworks, ensuring seamless integration with client workflows. I can create test processes and documentation from scratch (using Test Management Tools: TestRail, VSTS, JIRA); I'm also a professional in manual cross-platform/browser testing, reviewing software behavior and logic, tracking defects, and reporting them. Meanwhile, I have participated in more than 7 projects and can work on more than 2 projects simultaneously. Performing such types of testing: ✅ Manual ✅ Exploratory ✅ Functional ✅ System ✅ Regression Tech Skills: - Deep knowledge of HTML, CSS, SQL for Software Testing; - Development and execution of test cases, checklists, use cases; - Regression, acceptance, smoke, functional testing; - Defects creation/verification; - Preparing test reports/test plans; - Work with the client: requirement analysis, stand-ups and leading demo; - Release support and smoke testing on Production; - API testing (Postman); - Projects were developed and delivered using AGILE methodology; - Reviewing project requirement documents, functional specifications; - Working with bug tracking systems (JIRA, Azure Devops, TestRail, Asana,Trello); - Test Management Tools - TestRail, Zephyr, Azure Devops - Compatibility testing - BrowserStack Soft Skills: ✔️ Excellent Analytical and problem-solving skills ✔️ Strong Written and Verbal Communication ✔️ Willingness to Learn New Technologies ✔️ Ability to work efficiently in a fast paced Environment ✔️ Attention to detail ✔️ Ability to work independently and in team-based Environment ✔️ Strong interpersonal and presentation skills Bulletproof your software with a QA strategy that delivers: - 🧩 Customized Testing Frameworks - 🔍 In-depth Manual Testing - 🤖 Cutting-Edge Automation with Cypress & Selenium - 📊 Data-Driven Results - 🔄 Agile Methodologies for Continuous Improvement Remember, in a world where 'good enough' just doesn't cut it anymore, exceptional quality is what sets you apart. Let's make your software not just work, but wow. 🌟 Hit that 'Invite to Job' button and let's elevate your software to stellar! 🚀

Most "AI developers" can wire ChatGPT to a database. I build agent systems that survive in production — orchestrators with retries, state management, observability, and cost control. 6+ years as a Software Engineer, now full-time System Engineer building AI-driven SaaS at Mplus (DE), available for select Upwork projects. I'm Martin — Top Rated, 100% JSS, 5★ across all closed contracts. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I ACTUALLY SHIP → Production AI agents that don't fall over Stateful agents with retries, tool routing, error recovery, observability, and cost control — not a demo that breaks on the second user. → Custom orchestration when frameworks aren't enough LangGraph and Claude MCP where they fit. Custom architectures when your workflow doesn't fit a framework. I design the agent system — I don't just bolt one together. → Claude & OpenAI integrations done seriously Anthropic Claude with Tools and MCP, OpenAI Assistants & Agents SDK, function calling, structured outputs, streaming, hybrid model routing for cost/latency trade-offs. → Full-stack delivery around the agent Python for the AI layer, Node/TypeScript for APIs and web. Postgres, pgvector, queues, webhooks. The agent isn't the product — the system around it is. I build both. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ CURRENT WORK (gives you a sense of what I do day-to-day) System Engineer at Mplus (DE) — building an AI-driven SaaS for residential energy efficiency analysis: B2C assessment tools plus a B2B contractor marketplace. Real users, real production. Past: R&D monitoring system for a Tel Aviv pharmaceutical client. High-traffic B2C platform with 1.2M+ users at Enkonix (AWS, message queues, cross-team integrations). ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ MY STACK AI Layer: Anthropic Claude (Tools, MCP), OpenAI Assistants & Agents SDK, LangChain, LangGraph, custom orchestration Backend: Python (primary), Node.js, TypeScript, FastAPI, Express Data: PostgreSQL, pgvector, Redis, MongoDB, Supabase Infra: AWS, Vercel, Docker, queues, webhooks, observability Web: React, Next.js (when the agent needs a UI around it) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW I WORK Day 1-2: Discovery call. I map your agent's workflow, edge cases, and failure modes BEFORE writing code. Week 1: First working agent loop in staging — you run real inputs against it. Ongoing: Async updates, weekly demo, observability dashboard so you see what the agent is doing. Handoff: Clean repo, README, evals, deployment docs, runbook for common failures. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ NOT A FIT IF YOU NEED: ✗ "Build me a ChatGPT clone" — that's a wrapper, not an agent ✗ Pure prompt engineering with no system behind it ✗ Trading bots, gambling, or crypto-trading AI ✗ The cheapest bid — I'm not it ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you've hit reliability walls with n8n + GPT, or you're past the prototype stage and need a real system — send me the brief. I'll come back with a scoped architecture plan, not a generic pitch. — Martin