Hire the Best OCaml Developers
Kyiv, Ukraine
I build production-grade web applications, APIs, and ERP/CRM systems — from architecture to deployment. My work spans full-stack development, database design, Telegram bot backends, and Odoo customization, with recent projects involving AI integration, ML pipelines, and encrypted infrastructure on AWS. What I deliver Full-stack web applications (React/TypeScript frontend + Laravel or Python backend) REST API design, OAuth 2.0 + PKCE, role-based access control Database architecture and optimization — PostgreSQL, MySQL Odoo ERP/CRM: custom modules, QWeb templates, workflow automation, Telegram bot integrations (v16–v18) Telegram bots with backend logic and database integration AI/ML feature integration — model deployment, automation pipelines, intelligent assistants Server setup and DevOps — AWS EC2, Docker, Nginx, Linux administration Recent projects AI CRM Analytics Platform (SaaS, multi-tenant) Built a production-ready AI-powered CRM analytics platform from scratch. Sales teams connect HubSpot, Salesforce, or Pipedrive and query their live pipeline data in plain English — the AI responds using synced, up-to-date CRM data. OAuth 2.0 + PKCE integrations for 3 CRM providers Auto-sync every 15 min via BullMQ/Redis job queue GPT-4o query layer with intent classification and self-learning user memory Full CRM dashboard: contacts, deals, pipeline kanban, deal canvas, calendar Multi-tenant architecture on Supabase/PostgreSQL, deployed on Railway Encrypted CRM on AWS Secure hacker/terminal-aesthetic CRM with field-level encryption (PBKDF2-HMAC-SHA256), LUKS2-encrypted EBS volume, JWT session revocation with IP binding, Dead Man's Switch, and Twilio SMS/voice integration — deployed on AWS EC2. Odoo Custom Modules (v18) Telegram Bot API integration, custom QWeb print templates, insurance broker management module — built as portfolio deliverables with full documentation. Tech stack Backend: Python, PHP (Laravel), C#, Java Frontend: React, TypeScript, JavaScript, HTML/CSS Databases: PostgreSQL, MySQL Infrastructure: AWS EC2, Docker, Nginx, Linux ERP/CRM: Odoo v16–v19 Other: Telegram Bot API, BullMQ/Redis, GPT-4o, ML model integration, REST APIs Working style I take on projects where technical decisions matter — where someone needs a developer who understands business logic, can own the architecture, and delivers without hand-holding. I prefer clearly scoped work and direct communication. Available for long-term collaboration or well-defined project contracts.
- SQL
- Database
- Python
- Odoo
- Odoo Development
- React
- PostgreSQL
- JavaScript
- Laravel
- Java
- TypeScript
- Artificial Intelligence
- OAuth
- SaaS Development
- Redis
- Docker
- Git
- Node.js
- Kubernetes
Kampar, Indonesia
I’m a Software/AI & VPS Engineer, I can fix anything with zero mistakes n build everythings easily n fastest, i got unlimited Codex token, love to do things OpenClaw, Blockchain, Pipeline, flutter, flutterflow, build tools, Internal tools, Modules, Bot, Mod, sys Linux n i can copy any site 100% match quick n easy n i strong in backend and full-stack systems and build Web apps, Mobile Apps, Desktop Apps, Rust/Tauri, Electron, Browser Extension n trading system, n strong Web3 edge (EVM, Stellar & Solana). I turn ambiguous ideas into secure, reliable, human-centered products using TypeScript/JavaScript, React/Next.js, Node.js/Nest, Go, Python, Solidity, Rust (Anchor), and modern infra. I care about clean architecture, measurable impact, and great developer experience (DX) also so features ship fast and safe, also love building an Apps & AI things. for the security side, I bring pentest/audit mindset to every build: threat modeling, fuzzing & invariants, automated checks in CI, and clear, actionable reports. I also provide English technical translation/localization for whitepapers, docs, and UI strings. Languages: TypeScript/JavaScript, Vue, Go, Python, Solidity, Rust (Anchor), Php, Ruby, C & C++ Frontend: React, Next.js, Tailwind, Radix/shadcn, Vite, SSR/SSG/ISR, Flutter Backend: Node.js (Nest/Express/Fastify), Go (Gin/Fiber), GraphQL, REST, gRPC, WebSockets Web3: Solidity, Rust/Anchor, Hardhat, Foundry, OpenZeppelin, viem/wagmi, ethers.js, WalletConnect v2, Safe, The Graph, IPFS Testing: Jest/Vitest, Playwright, Supertest, Foundry (fuzz/invariants), Slither, Echidna Data: PostgreSQL, MySQL, SQLite, Prisma/TypeORM/Knex, Redis DevOps: Docker, GitHub Actions, basic K8s, AWS/GCP basics, Sentry, OpenTelemetry, Tenderly, OpenZeppelin Defender Security: OWASP ASVS/API, RBAC/ABAC, token design, key/secret rotation, rate limiting & anomaly detection, audit reports DeFi staking: with upgradeable proxies storage-safe upgrades, 0 criticals in audit NFT marketplace royalty splits, subgraph indexing, gas-optimized listings Solana program PDA-secured escrow with CPI, wallet-adapter UX, >95% test coverage Payments & off-chain settlement Webhooks + queues, idempotent APIs, chargeback handling Security engagement BOLA/IDOR class bugs identified; implemented header-precedence fixes & authZ binding
- Blockchain Architecture
- Web Development
- NFT
- App Development
- iOS Development
- Web Application
- Product Development
- Android App Development
- Web3
- Flutter
- Full-Stack Development
- AI Builder
- Flutter Stack
- Technical SEO
- Linux
Rabat, Morocco
I am Hamza, a Top Rated Plus Full Stack and AI Engineer. I specialize in creating dynamic web applications and integrating smart artificial intelligence solutions. I am completely flexible regarding technologies and frameworks, which allows me to adapt my skills directly to your unique project requirements. I am highly capable in both frontend execution and backend logic, ensuring a seamless flow of data and an excellent user experience. I build software that works beautifully and scales effortlessly.
- Elixir
- Deep Learning
- Python
- Machine Learning
- Python Script
- JavaScript
- TypeScript
- Docker
- Terraform
- Ansible
Indore, India
I'm an Odoo Engineer with over 7+ years of experience implementing and customizing ERP solutions, with a passion for Business Process Automation. In my Odoo journey, I’ve had the privilege of working on diverse projects for clients worldwide, enhancing their business operations through tailored Odoo ERP solutions. Here’s a snapshot of my experience: Swiss Project: I spearheaded the migration from SAP to Odoo ERP, developing custom modules for Swiss QR code e-billing, multi-country tax calculations, and procurement/order management. I also built a corporate website and APIs for integration with their proprietary payroll system. US Project: I crafted a custom unified view for various modules, developed a backend theme, and integrated the system with a mobile app. Australian Project: I developed custom APIs and a mobile app for a client in the construction & audit industry. Belgian Project: I managed a services project involving theme development, custom module development, and handling Odoo related tasks/tickets/bugs. In addition to these, I’ve enhanced the community Odoo version with custom features for a Swiss-based ERP/CRM and IT service provider. These enhancements include payment reconciliation functionality, invoice generation with barcode payment information for Swiss companies, Azure AD integration including Microsoft SSO, proprietary HRMS integration, SharePoint integration for project file management, and Stripe payment integration. I’ve also worked on various other Odoo customization projects, including the Payroll Reports Module from Odoo v10 to v14, the Payroll module from v11.0 to v14.0, a Transaction module for a Real estate business from v15.0 to v16.0, and an Accounting module from v15.0 to v16.0. My clients for development and maintenance work in Odoo include 2bit , wift, and powagroup. I’ve successfully customized Odoo apps to meet the specific needs of my clients across different industries, including construction, retail, and manufacturing. I provide ongoing Odoo maintenance and support, and perform customization and feature enhancements in their Odoo ERP system to meet their business requirements. My team is involved in Odoo standard unit testing to ensure error-free working of their Odoo ERP system. I have migrated Odoo modules from older versions to the latest version i.e. Odoo 14 and also enhanced its features according to the client’s requirements. This extensive experience with Odoo ERP implementation and customization makes me a valuable asset in any Odoo-related project. I am always happy to discuss requirements in more detail and provide tailored solutions that meet specific needs. I look forward to hearing from potential clients and partners. Best Regards. Megha
- Odoo
- Dashboard
- Odoo Development
- ERP Software
- Python
- Business Process Automation
- PostgreSQL
- Automated Workflow
- CRM Automation
- Point of Sale & Payment Systems
- Business Process Management
- Data Migration
- Accounting
- Manufacturing & Construction
- Report
- POS Terminal
- AI Model Integration
- Enterprise Software
- XML
- Supply Chain & Logistics
Addis Ababa, Ethiopia
I'm a full-stack software engineer with hands-on experience building SaaS platforms, scalable web & mobile applications, Chrome extensions, enterprise-grade systems, AI-powered automations, and interactive games. I also bring strong DevOps, MLOps, security, and cloud infrastructure expertise, ensuring the solutions I deliver are robust, scalable, and secure. What I Work With: ✅ Frontend & Mobile: React.js, Next.js, React Native, Flutter ✅ Backend: NestJS, Django, Flask, FastAPI, Node.js ✅ Languages: Java, JavaScript, Python ✅ Chrome Extensions & Bots: Chrome extensions (custom UIs, automation, PDF tools), Telegram bots, trading bots ✅ Automation & AI: n8n, LangChain, LangGraph, Flowise, CrewAI ✅ ERP Systems: Odoo, ERPNext – custom modules, workflows, business logic ✅ Integrations: Stripe, PayPal, payment gateways, CRMs, APIs, databases, email systems ✅ Game Development: Unity, Unreal Engine, Blender – 2D/3D games, interactive experiences DevOps, MLOps & Security: ✅ Linux server administration & shell scripting ✅ AWS (EC2, S3, RDS, DynamoDB, Lambda, CloudWatch) ✅ Terraform & Infrastructure as Code (IaC) ✅ Docker & Kubernetes (container orchestration, CI/CD) ✅ Scalable system design & distributed architectures ✅ Security best practices (IAM, encryption, secrets management, vulnerability checks) ✅ MLOps workflows (model deployment, monitoring, scaling, API integrations) Virtual Assistant & IT Support: ✅ Data entry, research, email & calendar management ✅ Document formatting (Google Docs, Word, Excel, Sheets) ✅ Online store management (Shopify, Etsy, Amazon listings) ✅ CRM management (HubSpot, Zoho, Salesforce, Odoo) ✅ Troubleshooting Windows, Linux, macOS issues ✅ Website setup & fixes (WordPress, Shopify, Wix) ✅ Cloud & email setup (AWS, Google Workspace, Microsoft 365, Zoho Mail) ✅ Zapier/Make integrations & workflow automation ✅ Remote technical support & software installation Content Creation & Digital Marketing: ✅ Video editing (social media reels, YouTube, promos, ads – DaVinci Resolve, CapCut, Adobe Premiere Pro) ✅ Graphic design & branding (Canva, Photoshop basics) ✅ Running paid ads (Facebook, Instagram, Google Ads) ✅ Social media management (posting, scheduling, engagement, analytics) ✅ Blog formatting & content uploads (WordPress, Medium) ✅ Copywriting for product descriptions, captions, and ad creatives What I Do Best: 🚀 Build full-stack, scalable SaaS applications for web & mobile 🛠️ Develop Chrome extensions, Telegram bots, and trading bots 🎮 Create interactive games with Unity, Unreal Engine, and Blender 📦 Integrate and customize ERP systems for business workflows 💳 Architect secure payment systems with Stripe & PayPal integration 🤖 Build AI workflows, automations, and agent-based systems ☁️ Deploy & manage scalable cloud infrastructure with DevOps best practices 🔐 Ensure applications follow security-first architecture Why Work With Me? 🔹 Proven experience across frontend, backend, DevOps, MLOps, bots, and game development 🔹 Strong expertise in SaaS, cloud systems, and payment integrations 🔹 Focused on performance, clean code, and scalable architecture 🔹 Clear communicator, deadline-driven, client-focused 📫 Let’s Connect – Available for freelance, contract, or team roles 🔗 GitHub: github.com/Biniyamseid
- Machine Learning
- Python
- JavaScript
- Flutter
- NestJS Development
- Flask
- Django
- React
- FastAPI
- Odoo
- Linux System Administration
- Docker
- OWL
- ERP Software
- Enterprise Resource Planning
Zaandam, Netherlands
🟣 I'm Full-Stack Odoo-Developer since 2018. 🥇 Top-Rated Odoo-Developer in upwork ✔️I always complete work on time and with a high level of quality. My objectives are ethical practices, quality work and client satisfaction for long term in under budget. 🚀 My Skills: ✅ Customizing Odoo modules and creating new modules from scratch. ✅ Odoo Saas customization and Installation. ✅ Experience in JavaScript/Owl .(e.g POS) ✅ Odoo Integrations with third parties. ✅ Odoo + AI integrations (e.g., ChatGPT, automation workflows). ✅ Odoo + n8n / Zapier / make integrations for advanced workflow automation. ✅ Customizing Reports (Qweb and Xlsx). ✅ Setup Odoo behind Nginx with a SSL certificate (https) . ✅ Integration with other systems. ✅ Integration Shopify / woo commerce. ✅ Integration with CanadaPost / Freightcom shipping services. ✅ Python - XML - JavaScript. 💻𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐄𝐱𝐩𝐞𝐫𝐭 𝐎𝐝𝐨𝐨 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫
- Python
- PostgreSQL
- NGINX
- RESTful API
- SQL
- Odoo
- Apache Kafka
- Enterprise Resource Planning
- DigitalOcean
- Amazon ECS
- Odoo Administration
- OWL
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