⭐⭐ I help companies modernize Java applications, integrate AI capabilities, and solve performance bottlenecks in enterprise systems. ⭐⭐ I'm the creator of TraceLM, an open-source Java Agent for LLM observability, and I have 24+ years of experience building scalable Java solutions for startups and Fortune 500 companies. ⭐⭐ 24+ years of experience, 150+ completed Upwork projects, and $100K+ earned, delivering production-ready solutions for startups and Fortune 500 companies. ## Senior Java Backend Engineer | Fullstack & Performance Tuning **👑 24 years** of professional application development experience **✅ 150+** Jobs completed **✅ 150+** 5-star reviews **✅ 3000+** Hours delivered --- ### Trusted by High-Profile Clients | FirstTennessee (Fortune 500) | Amex (Fortune 500) | EDB Norway | ICICI Bank | --- ⭐⭐ What I Do Best (My Core Focus) | Area | What that means for you | |------|------------------------| | 👉 Java Backend | 20+ years. Spring Boot, microservices, REST APIs | | 👉 Performance Tuning | JVM optimization, query tuning, caching | | 👉 Complex Integrations | WebSocket, WebRTC, banking APIs | | 👉 Fullstack (when needed) | JavaScript, HTML5, basic React | | 👉 Cloud & Containers | Docker, Kubernetes, AWS (Lambda, DynamoDB, Amplify) | | 👉 Legacy Modernization | Moving old Java to modern Spring Boot | --- ⭐⭐ AI for Java Applications 👉 LLM integration 👉 LangChain4J 👉 AI agents 👉 RAG 👉 Enterprise AI APIs --- ⭐⭐ Technologies I Use ⭐Core:⭐ Java (8/11/17), Spring Boot, AI, LLM, Spring Framework, REST APIs, Microservices, JPA/Hibernate ⭐Backend tools:⭐ Docker, Kubernetes, AWS, GraphQL, CI/CD ⭐Fullstack:⭐ JavaScript, React (basic), HTML5 ⭐Specialized:⭐ WebSocket, WebRTC, Quarkus, Micronaut (learning/exploring) ### How I Work (Remote-Ready) - ✅ Daily async updates (Slack, Upwork) - ✅ Weekly sync call if needed - ✅ 4+ hours overlap with US/EU time zones - ✅ First response within 4 working hours - ✅ I go the extra mile to meet customer expectations

CTO level dev & Unreal Engine 5 expert with 20+ years of versatile IT background ✅ C++/Blueprint coding ✅ Expert in Multiplayer and Highload ✅ Generalist - Lightning setup, Material setup, Level design ✅ Game design ✅ Video production ✅ VR/AR ❗ Epic Mega Jam 2022 - 2nd place - the largest contest among Unreal Engine game developers! ❗ 6 times Showcased Unreal Engine Marketplace asset creator ❗ Public speaker Great communicator with a strong product vision. I'd love to help you in building excellent product and perfect it in every aspect. Prior to Unreal Engine got 20+ years of all-round experience, including: front and back-end development, UI/UX design, graphics design, project & product management. Experienced in Highload projects and BigData. Have brought tens of products from scratch to market. My main areas of interest: VR/AR, social apps, game development. My clients background includes: Vodafone, Accenture, Pfizer, BMW, MTS and many others.

Welcome to my Profile! During the last 13 years of my development career, I have made wide range of Applications (Including Cross - Platform mobile ones), Few of them even won first prizes in local startup competition, even including SeedStars Armenia. I am actively involved in acquiring new skills and being on top of the game when it comes to development. I try to constantly improve my skills, am reliable, hardworking and professional.

I am a Senior Software Engineer and Team Lead with over a decade of experience delivering complex software systems for clients in the UK, US, and globally. For the past 7 years I have been contracting as a Senior Team Lead, managing a team of 3 engineers while running multiple client projects in parallel. My work has spanned SaaS platform development, cloud transformations, AI and machine learning integrations, and full legacy system modernization — delivering complex, production-grade software across the UK and US markets. This is the experience I bring to every project on Upwork. I now run Central Code Station, which means I can take on larger and more complex work than a solo freelancer while still being the person you communicate with directly. On Upwork specifically, I have 14 completed projects and a 5-star record — mostly Chrome extensions and web apps. Those projects represent a fraction of what I have actually built. The full picture is above. What we build well: - Custom web applications and SaaS platforms - AI and machine learning integrations - Legacy system modernization and cloud migration - Browser extensions and automation tools - System architecture and technical leadership If you need software built properly — on time, with clean architecture, and by someone who has done this at scale — let us talk. Gavril Founder, Central Code Station

I'm a Senior Technical Specialist, CTO and Tech Lead, specializing in AI (first touched in 2006, exit for $130 M, top agency on Upwork in 2016) with active involvement in AI Agent development since 2023, and hyperactive in blockchain since 2017. 300+ projects shipped across AI, blockchain, and Web2 I help founders and operating teams turn complex AI and blockchain ideas into working systems. The work usually looks like one of three things: ▸ AI AGENTS & AUTOMATION — through ADAIA (Dubai, since 2023) AI venture studio building agentic systems for industries left behind by AI: architecture, engineering, construction, and industrial B2B. 15+ AI ventures launched in three years. Custom AI agents that run inside the tools your team already uses. Built with Claude, GPT, LangGraph, LangChain, n8n, Make, and Python. WHAT CLIENTS TYPICALLY SEE • +20% increase in outreach • +20% sales-conversion lift • +10% upsell optimization • −20% production / service costs • −30% admin overhead • VitruAI (flagship product) — agentic-AEC platform deployed inside Revit, Rhino, Grasshopper, ArchiCAD, AutoCAD, Navisworks, BIM 360, and Procore via MCP, signed add-ins, and SignalR bridges. Dubai Villa Code: 180 rules encoded, compliance review cut from 14 hours to 14 minutes, every finding linked to rule + element + measurement. • Orion AI Systems (sister product) — industrial B2B revenue agents for sales, marketing, and customer-success workflows. Managed service, per-tenant inference isolation, governed and auditable. ▸ BLOCKCHAIN STRATEGY & BUILD — through Applicature (since 2017) and Vidma Security (since 2021) Applicature is a blockchain consulting and venture building house. Concept-to-launch for DeFi, RWA, GameFi, DePIN, and DAO projects. Tokenomics, smart contracts (Solidity, Rust/Anchor), TGE management, and regulatory routing through MiCA, SEC, VARA, and MAS. Vidma Security runs the audit practice — combined automated scanning (Slither, Oyente, Manticore) with line-by-line manual review. TRACK RECORD: 270+ projects delivered · 30+ token launches · 150+ smart contracts deployed · $500M+ raised for clients · $100M+ TVL across DeFi protocols · ZERO post-audit exploits across five jurisdictions. Enterprise Ethereum Alliance member since 2017. Oracle Silver Partner. Named Top 10 ICO Development Agency in 2018. ▸ FRACTIONAL CTO & TECHNICAL CO-FOUNDER Senior leadership embedded part-time. Architecture, hiring, investor calls, vendor evaluation, and product roadmap. 20+ engagements to date. Tech stack: AI / Agents — Claude, GPT, LangGraph, LangChain, n8n, Make, Zapier, Python, vector DBs, MCP, RAG pipelines. Blockchain — Solidity, Rust, Ethereum, Polygon, Arbitrum, Optimism, BSC, Solana, ICP. Hardhat, Foundry, OpenZeppelin, Slither. ERC-20, ERC-721, ERC-1400, ERC-3643. Compliance — MiCA, SEC, VARA, MAS. KYC/AML platform integration. How we work: • Discovery call — 30 minutes, focused on whether your problem is actually a fit. • Scoped engagement — fixed-price or hourly, with weekly working sessions. • Retainer or fractional CTO for ongoing leadership. Send a short brief and I'll come back within one business day what the next step looks like.

1. Overview For the past 7+ years, I’ve worked across the full stack, but my focus goes beyond wiring frontend to backend. I design systems where AI is not a feature added later, but a core part of how the product behaves, adapts, and delivers value. I’ve taken ideas from rough concepts to production, shaping everything from UX decisions to model integration and infrastructure. That includes building fast, intuitive interfaces, architecting reliable APIs, and embedding AI in ways that actually improve user outcomes, not just add complexity. I care about clarity in both code and product direction. Clean architecture, practical AI usage, and scalable design are my defaults. I don’t chase trends. I build things that work, evolve, and last. 2. What I Build - AI-powered web platforms and SaaS products - Full stack applications with scalable architecture - Intelligent workflows and automation systems - Modern frontend experiences with strong UX focus - API-driven systems and backend infrastructure - Internal tools, dashboards, and operational platforms - Cross-platform applications and real-time systems 3. Technical Expertise - Frontend: React, Next.js, TypeScript, Tailwind CSS, Modern UI/UX systems, Performance optimization, Responsive web applications - Mobile: React Native, Expo, Flutter, Swift, Kotlin, Java, Objective-C, Cross-platform iOS & Android development, Native mobile integrations, Push notifications, Mobile-first UI architecture, App performance optimization - Backend & Infrastructure: Node.js, Express.js, NestJS, Python(FastAPI/Django), REST APIs, GraphQL, PostgreSQL, MongoDB, Redis, Docker, AWS, Scalable cloud architecture - AI & Automation: LLM integrations, AI-assisted workflows, Conversational AI systems, Retrieval-based systems (RAG), Intelligent automation, AI-powered product experiences, Prompt workflow architecture, LangChain, Vector databases 4. How I Work I approach engineering with a product mindset. That means balancing technical quality with usability, scalability, and long-term maintainability. My focus is not just shipping features, but designing systems that: - remain maintainable as products grow, - support real user workflows, - scale cleanly over time, - integrate AI in practical, measurable ways. I value clear communication, strong ownership, and thoughtful decision-making throughout the development process. 5. Closing Whether building from scratch or improving an existing platform, I bring deep full stack experience, AI-focused product thinking, and a strong engineering foundation to every project. I build systems that are reliable, adaptable, and designed for long-term growth, not short-term hype.

Senior UX/UI Designer & Web Developer --------------------------------------------------------------------- 🔹 Lead web and mobile design projects, for iOS and Android applications. 🔹 Design end-to-end design processes: from user journey mapping, wireframing, and sitemap creation to high-fidelity UI delivery. 🔹 Expert in apps and tools such as Figma, After Effects, Photoshop, Illustrator, Webflow, WordPress. 🔹 Drive design efficiencies in onboarding, sales funnels, and conversion strategies, ensuring an optimal user-centric approach. 🔹 Ensure accurate implementation on Webflow and WordPress, alongside integrating 2D and 3D animations via tools like After Effects, Lottie, and Spline. 🔹 Emphasize transparent communication and systematic project planning to optimize team collaboration and stakeholder engagement. 👋 Available to chat anytime. Feel free to reach out to consult about your project!

12 years of AWS DevOps engineering. AWS Certified Solutions Architect and AWS Certified DevOps Engineer. Top Rated Plus on Upwork. 100% Job Success Score. $200K+ delivered across cloud infrastructure, CI/CD automation, Terraform IaC, and backend systems for startups and enterprises. ✅ AWS DevOps engineer: cloud architecture, infrastructure automation, CI/CD pipelines ✅ Infrastructure as Code with Terraform and CloudFormation across AWS environments ✅ Containerization and orchestration: Docker, Kubernetes, EKS production deployments ✅ CI/CD pipeline setup with Jenkins, GitHub Actions, and GitLab CI ✅ AWS security and compliance: IAM, VPC, GuardDuty, encryption, and audit-ready setups ✅ Monitoring and observability: Prometheus, Grafana, CloudWatch, centralized logging ✅ AI and ML infrastructure: SageMaker, MLOps pipelines, Python-based AWS automation ✅ AWS cost optimization and performance tuning on live environments ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I DO AS AN AWS DEVOPS ENGINEER ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ - AWS cloud architecture and migration - as an AWS DevOps engineer I design and build cloud environments from scratch and migrate existing infrastructure to AWS. Architecture covers VPC design, EC2 and EKS cluster setup, RDS and Aurora configuration, S3 and CloudFront delivery, and AWS Lambda serverless workflows. Every AWS environment I deliver is built with security and cost control designed in from the first resource, not patched on after. - Infrastructure as Code with Terraform and CloudFormation - as an AWS DevOps engineer I write all infrastructure in code so environments are reproducible, version-controlled, and auditable. Terraform modules for multi-environment setups with state management and drift detection. CloudFormation for AWS-native stacks where Terraform is not the right tool. All IaC delivered in your repository so your team owns it after handoff. - CI/CD pipeline design and implementation - as an AWS DevOps engineer I build pipelines with Jenkins, GitHub Actions, and GitLab CI that take code from commit to production with automated testing, Docker image builds, container registry publication, and deployment to EKS or ECS. Pipeline design covers branch strategy, environment promotion gates, and rollback logic. - Containerization with Docker and Kubernetes - as an AWS DevOps engineer I containerize applications, build Docker images optimized for production, and deploy on Kubernetes EKS with proper resource limits, health checks, horizontal pod autoscaling, and namespace-level RBAC. Helm charts for repeatable deployments across environments. - AWS security and compliance - as an AWS DevOps engineer I implement IAM least-privilege role design, VPC segmentation, security group auditing, GuardDuty threat detection, CloudTrail logging, and AWS Config compliance rules. Every AWS environment I deliver is production-ready from a security posture, not just functionality. - Monitoring and observability - as an AWS DevOps engineer I set up Prometheus and Grafana dashboards, CloudWatch alarms, centralized log aggregation with ELK or OpenSearch, and alerting pipelines so your team knows about problems before users do. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT YOU GET ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Every AWS DevOps engagement starts with a review of the existing infrastructure or requirements before any resource is created. You get documented architecture, Terraform or CloudFormation code in your repository, CI/CD pipelines your team can own, and an AWS environment that is secure, cost-optimized, and maintainable without me being involved in every change. Share your current setup or requirements and I will come back within 24 hours with what needs to change and what it will cost.

I'm a senior full-stack engineer with an economics background and years of experience building products at early-stage, venture-backed startups From med-tech to bio-manufacturing to analytics, I've shipped real products that real people depend on. If you've been left with a half-finished project or a problem that feels so complicated that you don't know where to even begin, that's exactly the situation I'm good at walking into. I'll give you a straight assessment of where things actually stand before promising anything. Then I'll get it across the line.

I'm a seasoned, senior game development executive with 36 years of industry experience, specializing in Unity game development and C# programming. My expertise spans from concept creation to live-service operations, making me an ideal partner for your game development projects. What I Offer: * Unity Game Engine Mastery: Deep expertise in both gameplay programming and rendering. * C# Programming Excellence: Over 23 years of experience crafting advanced game logic and tools. * Full-Stack Game Development: From frontend gameplay to backend systems and cloud integration. * Game Engine Development: Creator of HeroEngine, used in major titles like Star Wars: The Old Republic. * Cross-Platform Development: Proficient in developing for PC, mobile, and web platforms. * Shader and Compute Shader Programming: Optimize graphics and enhance visual effects. * Leadership and Project Management: Experienced in managing teams of up to 50 employees and 100+ contractors. Career Highlights: * Founded Simutronics Corp and Critical Thought Games * Shipped 15+ successful titles across various platforms * Pioneered online gaming with CyberStrike, the first online 3D action game * Created acclaimed mobile games like geoDefense, geoDefense Swarm, Lara Croft Relic Run and many more * Ported games to Unity, such as the famed Temple Run * Led projects such as SIEGE: World War II and GALAHAD 3093 Skills Include * Full Cycle product development from concept to publish (and live service thereafter) * High-Level Architecture * Scripting at all levels: game mechanics, visuals, systems, interactions with external services, etc. * Advanced Techniques: IK Systems, Procedural Motion, Effects, Custom Domain Specific Languages, Threading, ECS/DOTs, custom pathfinding, AI, etc. * Technical Art: Shaders / Compute Shaders, Graphics Optimization * Azure, AWS, Snowflake, various game backends PAS and other platforms * git, GitHub, Trello, Jira, various CI tools You name it, I've done it. And probably the guy who helped Unity get it right in the first place. Whether you need a complete game developed from scratch, technical problem-solving, or expert consulting on your existing project, I bring a wealth of experience and a track record of success to the table. Let's create something extraordinary together!