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Software Engineer with 10 years of experience building SaaS products, internal platforms, and cloud-native applications. I've worked across startups, outsourcing companies, and large organizations, helping teams build and scale products from early-stage MVPs to production systems serving thousands of users. My experience spans multiple technology stacks, including Node.js, Python, Rust, React, Next.js, PostgreSQL, and AWS. Throughout my career, I've worked with frameworks such as Django, FastAPI, Laravel, Ruby on Rails, and NestJS, allowing me to adapt quickly to different products and engineering environments. Areas where I bring the most value: ✔ Full-stack web application development ✔ Backend systems and API design ✔ Cloud infrastructure and DevOps on AWS ✔ AI-powered applications using OpenAI, Claude, and modern LLM technologies ✔ Workflow automation and system integrations Recent areas of focus: ✔ AI chatbots and copilots ✔ RAG and knowledge-based AI systems ✔ AI agents and workflow automation ✔ Serverless and cloud-native architectures ✔ SaaS product development Core technologies: Node.js, Python, Rust, TypeScript, React, Next.js, PostgreSQL, AWS, Docker, Terraform, OpenAI, Claude, n8n

I am a senior software engineer with a Master's in Computer Engineering from the University of Waterloo and several years of experience building production systems for companies including Huawei, Sumo Logic, and Rakuten. I help businesses build reliable web applications, scalable backend systems, cloud infrastructure, and AI powered automation tools. My work covers the full development cycle, from architecture and database design to API development, frontend implementation, deployment, and long term maintenance. What I can build for you: Full Stack Web Applications Modern web apps using React, TypeScript, Node.js, Python, Go, PostgreSQL, MongoDB, and cloud based deployment. AI Agents and LLM Integrations Custom AI assistants, RAG pipelines, OpenAI and Anthropic API integrations, prompt workflows, document automation, and AI features inside existing products. Workflow and Business Automation Automation for repetitive business tasks, internal tools, data workflows, SaaS integrations, scraping, scheduled jobs, reporting, and AI assisted operations. Backend and API Development REST APIs, GraphQL APIs, authentication, role based access, database design, microservices, background jobs, and performance optimization. Cloud Infrastructure and DevOps AWS, GCP, Docker, Kubernetes, CI/CD pipelines, server setup, monitoring, deployment automation, and Infrastructure as Code. High Performance Engineering Performance critical services, distributed systems, and backend components using Go, Rust, C, and C++ when speed and reliability matter. Core technologies: Python, TypeScript, JavaScript, Go, Rust, C/C++, SQL React, Node.js, FastAPI, Django, REST, GraphQL PostgreSQL, MySQL, MongoDB, Redis OpenAI API, Anthropic API, RAG, AI agents, LLM workflows AWS, GCP, Docker, Kubernetes, Terraform, GitHub Actions Why clients work with me: I write clean, maintainable, production ready code I communicate clearly and give regular progress updates I can own a project end to end or join an existing engineering team I focus on solving the business problem, not just writing code I care about reliability, scalability, and long term maintainability Whether you need an MVP, backend system, AI automation tool, cloud deployment, or a full product build, I can help you design it properly and ship it with confidence. Send me a message and I will be happy to discuss your project.

20 years experience as a full stack and DevOps developer. Have worked in everything from personal and business web design to complex web applications, healthcare/EMR, Big Data/MapReduce/machine learning/AI applications. Typescript/NodeJS/Fastify/Express, React, Vue, Angular, Ruby & Ruby on Rails, Python/Flask/Django, Rust, Golang, Angular, PHP, Perl, Elixir, Haskell, C, C++, C#, Wordpress, Joomla, Drupal, Docker, Kubernetes, nginx, lighttpd, Redis, memcached, Apache, Linux/BSD, PostgreSQL, MySQL, DynamoDB, SQLite, MongoDB, Elasticsearch/Kibana/Logstash/Grafana, Neo4j, DB2, Oracle, MSSQL, and others. AWS, Google Cloud Platform, Azure, DigitalOcean, Linode, Heroku, Vultr, Bluehost, HostGator, etc..

I specialize in workflow automation and pipeline development primarily for computer graphics, video, and image processing - drawing on years of experience as a technical director at an animation studio. I'm always happy to discuss your task or project and explore solutions together. / __what_i_deliver__ - Automation of production processes, especially where the use of computer graphics is required - Tool & plugin development for 3D applications, building USD-based pipelines - Render farm setup, cloud rendering infrastructure and cost optimization - Synthetic 3d data generation, parametric modeling, Gaussian splatting - Image/video processing: custom ComfyUI workflows, gen ai image/video pipelines, ai motion capture - SaaS Full-stack dev, DevOps/FinOps, serverless GPU deployment - Blockchain apps, smart contracts dev - Reverse engineering, binary analysis, decompilation - R&D, mathematical tasks, algorithm implementation - Embedded/microcontroller programming: ESP32, STM32H7, Raspberry Pi and more / __tech_stack__ - Python, С/C++, TypeScript, Dart, GLSL - Backend: FastAPI, Node.js/Express, NestJS, MongoDB, PostgreSQL, Redis - Frontend: Qt (PySide), Svelte, React, Next.js, Flutter, Three.js, WebGL - ML/Generative: ComfyUI, PyTorch - Computer vision: OpenCV, MediaPipe, SAM, Yolo, ResNet - AI agents: LangGraph, Google ADK, Anthropic API - web3: Solidity, Hardhat, Foundry, OpenZeppelin, Dynamic.xyz, Alchemy, IPFS - Infra cloud: AWS , GCP, Hetzner, Railway, Vercel - Infra GPU cloud: Modal, Runpod, vast.ai, Koyeb - Infra Devops: IaC, Docker, K8s, Terraform, MinIO, NAS, S3 - RE: Frida, Ghidra, IL2CPP / __dcc_&_pipeline_tools__ - Blender (bpy, GeoNodes), Autodesk Maya (mel/python/OpenMaya), SideFX Houdini (hython, hscript, HDK), 3ds Max (maxscript), Unreal Engine, Foundry Nuke (incl. BlinkScript), Katana, DaVinci Resolve (incl. DCTL creation and Lua scripting), NVidia Omniverse kit, NVidia Lyra and more - Character creation automation: MetaHuman, DAZ Genesis, Faceform Wrap - Render engines: Pixar RenderMan, Maxon Redshift, Karma, Arnold, Cycles - Rendering pipeline: AWS Deadline Cloud, Pixar Tractor, Fox renderfarm - Adobe CEP and UXP extensions, ExtendScript and C++ plugins for After Effects, Premiere Pro, Photoshop, Illustrator - Project management: ShotGrid (now Autodesk Flow), FTrack, Perforce - Opensource industry: ASWF projects (ACES, OpenColorIO, OpenImageIO, OpenEXR, OSL, rez etc), OpenGL, WebGL, OpenCL, Vulkan, FFmpeg, OpenUSD ... and more. But if you've read this far, and your task is non-standard or lies at the intersection of different, not necessarily technical, fields, then I really love tackling unusual problems when it difficult to find a specialist. Write to me, I'll be glad if I can be of help.

I'm Adrian Roșian, a seasoned software consultant with over 16 years of experience, specializing in code review, due diligence, and project planning. With a background in computer and military science, I've developed custom solutions using PHP, Python, JavaScript but did not shy away from more exotic languages such as Haskell, Clojure and Scala. I have worked for projects of all size in travel and banking. Why Hire Me? 1. 👨🏻‍💻 Code Review: I thoroughly analyze your software architecture, code, and data to ensure top-notch quality, security, and compliance. 2. 🕵🏻 Due Diligence: I evaluate your software, processes, and teams to provide a clear picture of your current setup and what improvements are needed. 3. 📊 Planning: Got a groundbreaking idea? I assess feasibility, brainstorm the best tech stack, and help set up your technical team. I can even serve as an interim CTO! My leadership experience has a say here. Professional Background: As a Freelance Web Developer since 2009, I've created custom web solutions using technologies like PHP, Python, and JavaScript, but i also enjoy Haskell, Clojure and Go. I've built everything from eCommerce payment plugins to private jet booking systems. At WhiteCity Code, I lead teams to develop innovative solutions that enhance business operations. My teaching experience at Babes Bolyai University keeps me on the cutting edge of computer science. Why Trust Me? With a strong academic background in computer and military science, I bring a diverse skill set in development and project management. I've led successful projects like merchant acquisition portals and file encryption tools. Beyond my technical expertise, I value building strong, collaborative relationships with my clients. I'm here to understand your unique needs and tailor my services to help you succeed. Let's work together to make your IT project a success! Best regards, Adrian Roșian

Self-taught Haskell and NixOS free software developer since 2015, former self-taught OCaml software developer from 2005 to 2015, and self-taught GNU/Linux system administrator since 2010. Most of my work so far has consisted in understanding and (re)implementing algorithms found in scientific papers, with my main focus being on correctness. I do my best to understand what I do. I'm passioned by developing algorithms or fixing bugs. I am hardworking and a fast learner with communication skills for teaching and being accurate on technical matters.