I'm an AI Engineer with 15 years of experience, specializing in AI Agent Development, Documents Automation, Voice Agents and any Workflow Automation.
I help businesses to solve document-heavy challenges in Legal, Finance, Real Estate and Healthcare: no more missed payments, messy documents, lost contract deadlines, duplicate records, endless email chains and hours wasted searching through contracts & agreements, reports or spreadsheets.
🎯 Design and implement intelligent search or Retrieval Augmented Generation (RAG, Light RAG, Graph RAG) systems
🎯 Build and fine-tune custom AI agents tailored to your users and domain
🎯 Evaluate and compare AI models to choose the best fit for your goals
🎯 Add AI-powered features to your product with minimal disruption
🎯 Implementing Text-to-Speech (TTS) and Speech-to-Text (STT) pipelines for voice-enabled products
🎯 Architect and develop scalable full-stack and AI infrastructure, from MVP to production
🎯 Set up monitoring, observability, and continuous evaluation for your AI systems
🎯 Provide technical guidance on tools, models, and architectures to accelerate delivery
AI Integration & AI Architecture
• LLM agents, AI chatbots, multi-step reasoning, agent evaluation & orchestration
• Retrieval Augmented Generation (RAG, Light RAG, Graph RAG) systems
• Voice AI: TTS/STT pipelines (OpenAI, Whisper, Google, custom models)
• Embedding strategies, chunking techniques, prompt engineering
• LangChain, LangGraph (multi-agent workflows), LangSmith, Letta, LlamaIndex
• Vector databases: Pinecone, Milvus, Qdrant, Faiss
• Graph databases: Neo4j, Qdrant, ArangoDB
• Observability: feedback loops, self-reflection, hallucination mitigation, AI safety
• Model evaluation, fine-tuning, bias reduction
• AI Automation, NLP, intelligent task chaining
Solution Architecture & Technical Strategy
• CTO-as-a-Service: startup guidance, architecture, delivery leadership: from MVP to scale
• Event-driven systems, microservice & serverless patterns
• Cross-functional team orchestration, agile delivery
Tech Stack & Tools
• Python, Node.js, JavaScript (React, Angular, Vue)
• TensorFlow, PyTorch, PyBrain, deeplearn.js
• OpenAI, Anthropic, Hugging Face, LangChain, LangGraph, LangSmith, Letta, LlamaIndex
• Prompt design, chunking, vectorizing, embedding, fine-tuning
• Arize.ai for evaluation and monitoring
• n8n, Zapier, Make - API Integration, serverless, event-driven architecture
• Data Science, Data Analysis, Data Mining, Natural Language Processing (NLP)
• MongoDB, SQL, Firestore, Redis, Elasticsearch
• Vector DBs: Pinecone, Qdrant, Milvus, Faiss, Neo4j, Chroma
• Graphs: Neo4j, Qdrant, ArangoDB
• Google Cloud, AWS, Heroku
• Docker, CI/CD, scalable infrastructure
• Web, Android, iOS development, full-stack from MVP to production
JavaScript
Node.js
Artificial Intelligence
Chatbot Development
AI Agent Development
Machine Learning
AI Chatbot
Python
n8n
Automation
API Integration
OpenAI API
Bot Development
Natural Language Processing
Deep Learning
Juan Agustin T.
Geneve, Switzerland
$100/hr
4.8
81 jobs
MS CS & For 10 years the best threejs developer on upwork.
Working from the webgl fundamentals, all the way to R3F, webgpu and BabylonJS.
Why I do three.js? During my master in CS I realized the future was 3d graphics for the web.
I do GIS, CAD, data visualizations, ecommerce, landing pages and more. For custemers like American Express, Coca Cola, The Champion League and more.
Recently a lot of people vibe coding with claude asked me for help to improve their code.
Are you stuck with threejs? Get a proper WebGL engineer like me.
Need more support? I can develop, optimise, design and put into production complex systems and applications. Specialised in three.js, React, and JavaScript.
People also hire me because I'm fast and I don't get stuck in technical limitations. I specialised in getting into complex projects that were already running and fixing them quickly.
Trusted by The World Bank, American Express, Siemens, MIT & PerkinsWill.
I also like to discuss WebGPU, WebXR and VR.
🌟 Good to know
‣Degree in Computer Science with distinctions (top 1%),
-Master's in CS and MBA candidate at UvA, Amsterdam
‣Co-founder at ohzi .io
‣Education in fine arts, design and architecture
‣Living in🇪🇺, ex🇦🇷🇺🇸🇨🇭🇦🇩🇬🇧🇹🇼🇨🇳
‣Working remotely for ten years; +15 years with CAD tools, Data Visualization & GIS application
‣Excited about the latest web developments (WebGPU, Metaverse, XR, AI, WebGPU)
‣100% job success
‣75+ WebGL projects delivered in Upwork and many more outside
‣3000+ hours tracked
‣Happy to get into calls
Here's what I bring to the table:
△ Experience: I've released and maintained hundreds of WebGL/WebGPU/WebXR and Three.js/Babylon.js applications over the past decade.
Specialities:
- interactive web experiences
- e-commerce 3D customization tools
- 3D CAD platforms
- Data Visualisations
- GIS, Geographical Information System
- BIM, Building Information Modelling
△ Developer and Business person mentality: I run a business myself and understand KPIs and corp. values when pursuing a project.
△ Problem-Solving: I can define your new architecture and connect complex systems, whether in the back end or the front end.
△ Performance: I'm obsessed with getting high 90fps+ for real-time rendering in the browser
△ Versatility: I am good at understanding other developers' source codes, now it's even better with AI
Let's collaborate and bring your vision to life!
🌟 Strengths
△ Excellent understanding and elicitation skills (excellent usage of the English language).
△ Natural care for a well-designed code using good design patterns and OOP techniques.
△ Organized by nature, I use Trello, Jira, GitHub and Slack
△ I keep a live version of the project so that you can always track where I am.
△ I do pay attention to the details.
△ Self-motivated, competent, hard worker and responsible.
🌟 Projects I have been working at
△ Astrophysics visualization tool. A front-end + node tool that takes many results from astrophysics analysis and can plot them for easier visualization of outliers and interesting datasets.
△ “Opinion mining on social media and possible use in marketing” 2017 SaaS (B.SE. thesis final project): automated software for understanding public opinion on a topic of interest. Using Opinion Mining on social networks to understand and generate opinion networks for automatic consumer segmentation and labelling. In-house design and developed web architecture (angular.js, three.js, node.js, etc.).
△ Vegetation Simulation project. A distributed Java ML algorithm for vegetation growth simulation based on several parameters and a front-end view on the browser to visualize results. This app lets architects and agronomists analyze how vegetation grows depending on the soil type, nutrients, humidity, and sunshine and simulate the biome in the long run.
△Android puzzle game: directed a Unity 3D game development.
△ A high-performance CUDA encrypter/decrypter from scratch. Leveraging the power of the GPU, this piece of software can cypher a large number of megabytes in just milliseconds.
△ A PHP framework from scratch with MVC architecture, full CRUD operations, a central router, templates for the browser and top security measures.
🌟 Technical Skills
Web | Three.js, WebGL2, WebGPU, Babylonjs, JavaScript, WebSocket, Angular, React.js, Next.js, and Tailwind CSSS
Server | C, C++, Node, PHP, Mongo, Ruby, CUDA, Bootstrap, shell scripting, Linux, SQL, AWS
Engineering | Trello, UML, Design Patterns, Agile methodologies, Git, Jira, Slack.
Techniques | GIS, Computer graphics, Data and Opinion Mining, Parallel programming, AI.
Software. | Blender, SketchUp, Autocad, Unity.
File formats. | GLTF, GLB, COLLADA, FBX, OBJ, .VERT, .FRAG, STP ISO 10303, JS, TS, JSON
JavaScript
Web Design
Data Visualization
3D Animation
Game Development
HTML5 Canvas
WebGL
Three.js
English
Computer Graphics
HTML5
3D Rendering
Babylon.js
Mosh M.
Aarburg, Switzerland
$80/hr
5.0
5 jobs
10+ years experience in software development, from frontend to fullstack
Expert in React, TypeScript, Next.JS, Vue, Angular, JavaScript, HTML, CSS
Former Head of Development / CTO leading distributed teams and full product lifecycles
Strong track record in scalable frontend apps, API integrations, and CI/CD
Web3 / Blockchain experience with Solidity and hackathon projects (ETH Lisbon & ETH Porto)
Focus on performance, UX, and delivering business value
Node.js
Blockchain Architecture
Web Application
Product Development
Web Development
Software Architecture
Next.js
PostgreSQL
Tailwind CSS
Artificial Intelligence
API Development
TypeScript
OpenAI API
Adel E.
Oensingen, Switzerland
$100/hr
4.9
44 jobs
✅ Top Rated on Upwork
✅ 610+ Hours
My name is Adel and thank you for checking my profile, I have over 13+ years of extensive experience in frontend engineering, and 7+ years with backend development and more years in UI/UX design i have developed a lot of complex and enterprise web applications and websites and CMS development and i have helped many companies to consult and define rich frontend frontend architecture.
My skills:
✔ Web Applications
✔ Web Sites
✔ CMS Development
✔ Backend & API Development
✔ Full-Stack Web Applications
✔ Secure Systems & IAM
✔ Security Audits & Best Practices
Technologies I use
✔ React.js / Next.js
✔ TypeScript
✔ Svelte / SvelteKit
✔ Vue.js(2/3) / Nuxt.js(2/3/4)
✔ HTML / CSS3
✔ BEM / SCSS/SASS, SVG, Animation
✔ Ruby on rails
✔ Webpack, Vite
Tools I use:
✔ Claude Code
✔ Sketch / Figma / Zeplin / Invision
✔ Jetbrains Products ;)
✔ Visual Studio Code
Have any questions? Want to discuss your project?
Feel free to contact me anytime just drop me a message!
Have a nice day :)
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
“Upwork provides an umbrella-level of security. I can see a talent’s work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.”
KD
Kim Darling
Emerald Tiger
“Upwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.”
DM
David Merry
Kinetic Investments
“Our very specific requirements can be a challenge—With Upwork, we’re able to access a bigger community to ensure the success of our projects.”
Top interview questions to help you hire the right JavaScript developers, faster.
How do I hire a JavaScript Developer in Switzerland on Upwork?
You can hire a JavaScript Developer in Switzerland on Upwork in four simple steps:
Create a job post tailored to your JavaScript Developer project scope. We'll walk you through the process step by step.
Browse top JavaScript Developer talent on Upwork and invite them to your project.
Once the proposals start flowing in, create a shortlist of top JavaScript Developer profiles and interview.
Hire the right JavaScript Developer for your project from Upwork, the world's largest work marketplace.
At Upwork, we believe talent staffing should be easy.
How much does it cost to hire a JavaScript Developer?
Rates charged by JavaScript Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.
Why hire a JavaScript Developer in Switzerland on Upwork?
As the world's work marketplace, we connect highly-skilled freelance JavaScript Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream JavaScript Developer team you need to succeed.
Can I hire a JavaScript Developer in Switzerland within 24 hours on Upwork?
Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive JavaScript Developer proposals within 24 hours of posting a job description.
Find more freelancers
Top cities for JavaScript Developers in Switzerland