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I’m a Software Engineer with 4+ years of experience building and maintaining enterprise-grade backend applications using Java, Spring Boot, Hibernate, REST APIs, and SQL databases. I specialize in designing scalable backend systems, developing high-performance APIs, optimizing database operations, and integrating complex business platforms. Throughout my career, I’ve worked on document management systems, pharmaceutical serialization platforms, workflow automation, and large-scale data processing solutions. My core expertise includes: • Java (Core, EE) • Spring Boot & Hibernate/JPA • REST API Design & Development • PostgreSQL & MySQL • SQL Optimization & Database Design • Apache Camel Integrations • JSON/XML Processing • Git, Maven, Jenkins & CI/CD • Enterprise System Integration At Antares Vision Group, I contributed to CureSync, a pharmaceutical serialization platform used for compliance and product traceability, where I developed backend features, integration workflows, and optimized high-volume data processing. Currently, at AIGO, I develop enterprise document management solutions, building backend services, integrations, reporting modules, and workflow automation for business-critical applications. I focus on writing clean, maintainable code and delivering reliable solutions that help businesses scale efficiently. If you’re looking for a developer who can quickly understand complex requirements and deliver high-quality backend solutions, I’d be happy to help.

🙌 7+ Years of experience in full-stack web development 🏆 Top Rated Plus on Upwork | 100% Job Success Score | 7+ Years building for founders Hi, I'm Gabriel. For the past 7 years I've helped founders and teams turn ideas into real, working software, from MVPs that get to market fast to full SaaS platforms built to scale. These days, my focus is on full-stack development, AI integration, and SaaS. Many founders come to me after a previous developer disappeared mid-project, usually because of bad communication. So I've built my process around never leaving you guessing: you get a working demo every week, a shared board showing exactly what's done, in progress, and blocked, and honest answers when something's taking longer than expected. No chasing me for updates. That's how I've helped dozens of founders launch their ideas and grow them. You can check out my case studies below to see for yourself, or read what some of my clients have said: Ben Furtado | Founder of Moonlitemoney - ⭐⭐⭐⭐⭐ "Gabriel is awesome. I was struggling to find the right developer to knock out my software MVP. I tried a lot of people who were over complicating the project and taking forever. Gabe came in and rebuilt the whole ring from scratch and did it 10x better in 1/10th the time. He understands the vision and knows how to bring it to life. I really can’t recommend him highly enough. Thank you Gabe!" Seth Carstens | Web Development Lead Nextiva - ⭐⭐⭐⭐⭐ "Gabriel was a valuable member of our web development team. He always delivered high-quality work and was willing to go above and beyond with extra hours on the nights and weekends to get the project across the finish line." Cristian Sava | CEO at Compire LLC - ⭐⭐⭐⭐⭐ "Gabriel is an exceptional engineer, truly one of the best I've worked with. His expertise and willingness to go above and beyond ensure top-notch delivery on every project. Beyond his technical skills, Gabriel stands out for his excellent communication, a rare find on Upwork. He's also highly reliable; I can trust him to complete any assigned task on time and with outstanding quality." I love working with ambitious founders and teams who want their product to stand out and perform. If that sounds like you, let’s connect.

I'm a passionate Front-end and Full-Stack MERN Developer with expertise in Modern web technologies. I'm experienced in developing functional and good-looking websites for any business. Whatever you need, from building websites from scratch using simple HTML, CSS, JavaScript, and TypeScript, to developing bigger web applications using the MERN stack and additional frameworks, you need. I respond quickly and am available most of the time. My stack and technologies: • Front-end: TypeScript/JavaScript, React, Next.js, Vue.js, Nuxt.js, Tailwind CSS • Back-end: Node.js, Express.js, MongoDB, Prisma, PostgreSQL • Tools: GitHub, Git • UI/UX: Responsive designs, accessibility standards, Figma to code 🌐 Let's build something great together!

I fix urgent production problems: downtime, 500/502 errors, DNS/SSL failures, hacked WordPress sites, malware infections, Cloudflare misconfigurations, Magento/Shopify performance issues, failed migrations, server overload, and bot attacks. I start with a capped fixed-price diagnostic, so you know the root cause fast — without open-ended cost. ▸ EMERGENCY TROUBLESHOOTING — AWS/Linux, NGINX, PHP/MySQL, DNS, SSL, cPanel/Plesk. I diagnose across the full chain, stabilize live systems without breaking revenue paths, and explain the root cause in plain language. ▸ MALWARE REMOVAL & HACKED SITE RECOVERY — WordPress, Magento, and Linux server cleanup: webshells, backdoors, crypto miners, spam relays, SEO spam, redirect hacks. I find how they got in, remove everything (not just the visible files), fix the entry point, restore email/Google blacklist reputation, and harden so reinfection doesn't happen. ▸ CLOUDFLARE SECURITY & TRAFFIC ABUSE — WAF, DDoS mitigation, bot protection, rate limiting, Workers, Zero Trust. Scraping, carding, fake signups, login/cart/checkout abuse, API abuse. Cloudflare's defaults stop yesterday's attacks; I write the rules that stop yours. ▸ ECOMMERCE PROTECTION & CLEAN ANALYTICS — Shopify, Magento/OpenMage, WooCommerce. Bots inflating your sessions, wrecking your conversion rate, and feeding bad signals to Meta/Google? I block them at the edge — before they click your ads and pollute your pixels — and migrate analytics to Cloudflare Zaraz for clean attribution. ▸ AWS & DEVOPS — Architecture, EC2, VPC, CloudFront, RDS, ECS/Docker, migrations with zero downtime, monitoring, cost optimization, hardening. ▸ SECURE AI AGENT INFRASTRUCTURE — I deploy and harden agent, MCP, and automation workloads on AWS/Linux and cloud VPS environments. This includes Docker, reverse proxy, SSL, access controls, secrets, backups, monitoring, Cloudflare/API protection, and recovery documentation. I turn working prototypes into secure, operable production services. HOW I WORK: capped diagnostic first → root cause in plain language → fix with your approval → hardening so it doesn't happen again. I sign NDAs, ask only for the access I need, and document what changed. If production is on fire right now, send me the symptoms and URLs — I likely start today.

I build Unity game systems that are designed to last — modular, data-driven, and easy to extend without touching code. My focus: game systems architecture, ScriptableObject-driven design, interactive and gamified experiences. I've taken projects from GDD to final delivery, handling architecture decisions, client communication, and documentation along the way. Published games on Steam. Delivered client projects in Unity. Currently building a new title with an artist. What you get: Clean, scalable architecture from day one Full project ownership — I don't just build features, I think about the whole system Clear communication and documentation throughout EU timezone, fluent English, available for calls I work on projects that ship. If that's what you're building, let's talk.

Full-Stack Software Developer Full-stack software developer with professional experience building scalable, reliable, and maintainable applications using .NET and C#. I specialize in backend development, microservices architecture, cloud-native solutions, and database design, with hands-on experience using Docker, Kubernetes, SQL, and NoSQL technologies. My background includes both software development and QA engineering, giving me a strong focus on code quality, automated testing, and long-term maintainability. I have worked in Agile teams throughout the full software development lifecycle, collaborating closely with stakeholders while also successfully delivering projects independently from concept to deployment. I am proficient in .NET, C#, Python, Ruby, C, and C++, and I leverage modern AI-assisted development tools to improve productivity, accelerate delivery, and enhance code quality while maintaining full engineering oversight and adherence to industry best practices. Core Skills: .NET / C# Full-Stack & Backend Development Microservices Architecture Docker & Kubernetes REST API Development SQL & NoSQL Databases Python, Ruby, C, C++ Automated Testing & QA Agile Development I focus on delivering clean, maintainable, and high-quality software solutions that solve business problems and scale with future growth.