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Freelance OpenAI Developer - Adrian Segui
Freelance OpenAI Developer5.0 (237 reviews)

**📝 Profile Context / Summary** With 10+ years across enterprise IT and global freelancing, I am an AI-Stack Architect—not just a full-stack developer. In 2026, the industry has shifted decisively: software is no longer just written; it is architected, governed, and continuously learned. The most valuable engineers are no longer those who simply write code, but those who can turn code into cognition—engineers fluent in the AI-stack. I am that engineer. I design and build agentic platforms—systems where AI doesn't just assist but actively plans, builds, tests, and releases software. I have successfully delivered complex solutions across Medical, Fintech, Employee Management, and SaaS industries, handling everything from AI-native frontends to hyper-scalable microservices with autonomous agent orchestration. **🤖 AGENTIC AI & MACHINE LEARNING** 2026 is the breakout year of AI inferencing—where trained models generate predictions and outputs from new data. Most AI computing is now spent on inference rather than training. I specialize in: Agentic AI & Orchestration: LangChain, LlamaIndex, AutoGen, CrewAI—building multi-agent systems that plan, act, and adapt in real time. Full-stack agent platforms combining proprietary training data, planning models, and custom actuation layers. Generative AI & LLMs: OpenAI GPT-4/API, Google Gemini, Anthropic Claude, HuggingFace Transformers. Retrieval-Augmented Generation (RAG) with vector databases (Pinecone, Chroma, Weaviate, FAISS). AI-Native Development: 42% of committed code is now AI-generated, projected to reach 65% by 2027. I don't just use AI tools—I orchestrate AI agents across the entire SDLC: planning, design, build, test, deployment, and maintenance. Deep Learning & Classical ML: TensorFlow, PyTorch, CNNs (Computer Vision), RNNs/LSTMs (Time-Series/NLP), Scikit-learn, Pandas, NumPy. Model Deployment & Optimization: Model compression, quantization, edge computing, cost-per-prediction optimization. AI Governance & Security: AI-generated code carries roughly double the security risk violations of human-written code. I implement robust governance, testing, and security controls for AI systems. **⚛️ MODERN FRONTEND** React remains the most widely used UI library, with 67% of new enterprise React projects now built on Next.js—a 300% increase since 2023. React Server Components are now the default: Core: React 19, Next.js 16 (App Router, Server Components, Turbopack), Remix, Svelte 5 (runes), Astro. Styling: Tailwind CSS, shadcn/ui (1.87M weekly downloads), Framer Motion, Material-UI. State: Zustand (35% adoption, 35ms updates) vs Redux (38% adoption, 65ms), TanStack Query, Jotai. Build Tooling: Vite 8 with Rolldown (Rust-based, 10-30x faster builds), Turbopack. TypeScript: Used by 38% of professional developers, required in 72% of frontend job postings. **📱 MODERN MOBILE** React Native's New Architecture (stable since 2024) delivers significant performance improvements through synchronous native module calls: Frameworks: React Native (Expo), NativeScript, Flutter. Native: iOS (Swift/SwiftUI), Android (Kotlin & Jetpack Compose). Emerging: GPU-powered rendering for consumer and enterprise apps. **⚙️ MODERN BACKEND & API** Runtimes: Node.js (NestJS, Express), Bun, Deno, Python (FastAPI—57.9% developer usage, up 7% from 2024), Java (Spring Boot 4.0—modularized, Java 25 LTS support). Spring AI 1.0: Built-in support for integrating LLMs and AI services into enterprise Java applications. API Design: RESTful, GraphQL (Federation), gRPC, Webhooks, WebSockets. Event-Driven: Apache Kafka, RabbitMQ, AWS SNS/SQS. **☁️ DEVOPS & CLOUD (2026 Standard)** Cloud-native and Serverless adoption has surpassed 70% penetration in enterprise IT. Multi-cloud is now the standard—Gartner projects over 75% of cloud customers will adopt this model: Cloud: AWS, GCP, Azure (multi-cloud architecture). Containerization & Orchestration: Docker, Kubernetes (K8s), Helm. Serverless: AWS Fargate, Lambda, Cloudflare Workers—extending to data pipelines, real-time streaming, and event-driven microservices. IaC: Terraform, AWS CDK, Pulumi. CI/CD: GitHub Actions, GitLab CI, ArgoCD, Jenkins. **🗄️ DATABASES & SEARCH** Relational: PostgreSQL (PostGIS), MySQL, SQLite. NoSQL: MongoDB, DynamoDB, Firebase. Vector (AI): Pinecone, Chroma, Weaviate (for RAG and semantic search). Search: Elasticsearch, Algolia, Meilisearch. Caching: Redis, Memcached. **🔗 CRM, AUTOMATION & INTEGRATION** In 2026, the CRM market is consolidating around Salesforce, Microsoft, ServiceNow, and HubSpot as a durable challenger. Both platforms have invested heavily in agentic AI, predictive intelligence, and conversational AI: CRMs: Salesforce (Apex), HubSpot (Agentic Engagement Object), Zoho. Low-Code/No-Code: Gartner forecasts the low-code market at $44.5 billion in 2026, with 75% of new enterprise apps built on low-code platforms. Automation: VBA, Excel Macros, Google App Script, Bubble.io, n8n, Make, Zapier. Citizen Development: 80% of low-code users are now "citizen developers". **🚀 Why Partner With Me in 2026?** The software industry has crossed a clear threshold in 2026. Generative AI is no longer just helping developers write code faster—it is reshaping how software is planned, built, tested, and delivered. The role of the developer has evolved from coder to curator of intent, constraints, and outcomes. **I bring:** 10+ years of battle-tested engineering across the full spectrum. Agentic AI fluency—the ability to orchestrate AI agents across the entire SDLC. Systems thinking and architectural judgment—skills that AI cannot replace. Security-first mindset—AI amplifies what's already there; where code quality is managed, AI accelerates delivery; where it isn't, it accelerates technical debt and security exposure. Whether you need an AI-native application, a microservices overhaul, an agentic workflow orchestration, or an intelligent CRM integration—I deliver professional, scalable, and governable solutions. Let's architect intelligence together. **Contact me today.**

Freelance OpenAI Developer - RajhaRajesuwari S
Freelance OpenAI Developer5.0 (2473 reviews)

⏱ MY WORK HOURS : 7AM to 11 PM INDIAN STANDARD TIME . 16 HOURS A DAY :) I’m a senior full-stack developer with 19+ years of real-world experience delivering scalable web and mobile solutions across industries. I work end-to-end—from architecture and development to optimization, security, and deployment. 💻 Web Technologies AI, OPEN AI, GIThub Copilot, Claude Code, Loveable PYTHON , CORE JAVA , ASP.NET PHP Ecosystem: WordPress, Magento, Shopify, OpenCart, Joomla, OsCommerce Frameworks: Laravel, CakePHP, CodeIgniter, Yii Frontend: JavaScript, Angular, React Backend: Node.js, Python (Flask, Django) Automations : Zapier 📱 Mobile & Cross-Platform React Native FlutterFlow API-driven mobile app backends 🤖 Advanced Skills AI & third-party API integrations Payment gateway integrations SEO, speed optimization & performance tuning Malware removal & security hardening VB Macros & automation solutions ⚡ Strengths: Fast delivery, clear communication, production-ready solutions 👥 Team Support: Backed by a 10-member team (2 designers + 8 developers) for large-scale and long-term projects I don’t just write code—I solve problems, mentor developers, and deliver results. If you need reliable guidance or hands-on execution across web, mobile, or AI-powered systems, I’m here to help. Faster delivery and 24/7 communication are my greatest plus.

Freelance OpenAI Developer - Calvin T
Freelance OpenAI Developer5.0 (433 reviews)

- 5+ projects in freelancing mobile+website games in Construct 3 for clients - 1 year of daily tutoring in Construct 3 and C++ - 3 years of school learning experience with Java - 5 months of tutoring in Unity game dev - published one commercial Construct 2 game on Wii U "Reversi 32" - tutored Intro to Computer Science material using Python with Minecraft every week since Dec 2019

Freelance OpenAI Developer - Umair Jameel
Freelance OpenAI Developer5.0 (18 reviews)

● AI Powered development using Javascript and its frameworks/libraries like Angular, React, Next.js, Express, Node, Express, mongodb, mongoose etc. ● AI agents, prompt engineering, RAG, MCP servers, vibe coding. ● Full stack development in next.js including frontend, backend and databases. ● Architecture projects from scratch as well as building new features in existing projects. ● Debug and fix errors in existing projects. ● Database architecture using mongodb, postgres, ORMs like prisma and drizzle. ● Implement the best practices of code structure, logic building and making code efficient. ● Follow pure Object Oriented Programming and Data Structures for solving problems. ● REST API development using node and its frameworks (mainly express). ● Know best practices of writing test cases (it includes unit testing and automation testing). ● Decision making in choosing programming languages, frameworks and libraries for a particular project. ● Good communication skills and understanding client requirements. ● Do research and development to stay up to date with new technologies and always keen to adopt better approaches in solving any kind of problem. ● Experience in CI/CD, docker, github actions etc. ● Teaching experience for over 5 years now. These are some projects I have worked on: https://learnwith.flashclass.io/ https://www.getconch.ai/ https://eahousing.es/ https://www.blackbox.ai/ https://unation.com/

Freelance OpenAI Developer - Kevin Gonzalez
Freelance OpenAI Developer5.0 (2 reviews)

American (native English speaker) born and raised in New York City and now living in the richest country in the world, Luxembourg! I'm a product-centric CTO, engineering leader, and software engineer with 12+ years of experience crafting world-class software. I have strong expertise in React, Node, TypeScript, Python, Go, AI/ML, Azure, and much more. I've scaled organizations responsible for defining, engineering, and operating mission-critical systems optimizing $10B+ space assets while partnering with companies like SpaceX and other space. I have a powerful track record of establishing autonomous product-minded teams, pioneering agentic development workflows, and driving measurable commercial impact. For Codementor mentees: I remember exactly what it feels like to be stuck. You are writing good code, but you aren't sure how to break through to the next level. Whether that is becoming a Senior, Staff, or Principal Engineer, or eventually a VP of Engineering or CTO. Nobody hands you a manual for that transition. I started exactly where you are. I went from building React UIs as part of a scrum team to leading large organizations engineering the systems for multi-billion dollar satellite assets. Today, as the CTO of Symphonee AI, I still code every day. I do this because you can't lead engineers if you don't understand the reality of the work. I am here to help you see the things you don't know you don't know. I want to be the mentor I wish I had. Someone to cut through the noise, show you the shortcuts I learned the hard way, and help you get to that next level faster. Whether you are feeling lost, facing a specific technical challenge, or just ready to move up, let's talk.

Freelance OpenAI Developer - Maria Samuel
Freelance OpenAI Developer5.0 (14 reviews)

I am a Microsoft Certified Professional with over 15 years of development and solutions Architect experience. I have several MSFT certifications to back my skills and prove my expertise. I am also well versed in all Azure AI services and can work on small-mid projects that require GenAI features including RAG pipelines. I can work on backend and frontend applications. I have worked on a number of projects ranging from fully Azure based cloud app, DevOps set up from scratch to Mobile development using React Native. I have a range of hands on skills and also the ability to architect and maintain complete solutions.

Freelance OpenAI Developer - Saurabh Gupta
Freelance OpenAI Developer

I am a **Senior** **Product Architect & Engineer** with 10+ years of experience bridging product strategy, system architecture, and full-stack execution. I specialize in taking products from zero to one and architecting scalable, cross-platform applications across Web, Mobile (Capacitor/Ionic), and Desktop (Tauri/Electron). I operate at the intersection of UX fidelity, clean system design, and business constraints—ensuring applications are fast, maintainable, and aligned with user needs. ### Core Offerings & Focus Areas: * **0-to-1 Product Architecture & Multi-Tenant Platforms:** Designing modular, cloud-native frontend and backend systems (Next.js, Node.js, Python, PostgreSQL/Supabase, AWS) with strict isolation, high performance, and rapid deployment cycles. * **AI-Native Applications & Interfaces:** Architecting user-facing AI workflows with OpenAI and Google Gemini APIs. Specialization in building transparent interfaces requiring source attribution, confidence metrics, and audit trails. * **Cross-Platform Product Strategy:** Unified codebases powering Web, Hybrid Mobile (Ionic/Capacitor), and native-feel Desktop apps (Tauri/Electron) to maximize feature velocity and reduce maintenance overhead. * **Design Systems & Frontend Infrastructure:** Establishing robust component libraries (Tailwind, Radix/Shadcn) and end-to-end testing pipelines (Playwright) to accelerate teams without sacrificing UI polish. **Core Stack:** TypeScript, React, Next.js, Node.js, Python, PostgreSQL, Supabase, Tauri, Ionic/Capacitor, React Native, AWS, Playwright.

Freelance OpenAI Developer - Nishant Tiwari
Freelance OpenAI Developer

- A Full-stack software developer - Passionate about new technologies - Always ready to help - Experience .Net ecosystem, Java and react - Clean coder

Freelance OpenAI Developer - Kazi Sohan
Freelance OpenAI Developer5.0 (172 reviews)

I love to teach what I know. I think I can explain things easily with examples. I have been working as a Software Engineer for the last 5 years and have worked with some of the world's most reputed companies like **Open AI, Scale AI, Doloras Lab**, etc as a freelancer.

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Frequently asked questions

How long do OpenAI projects normally take?

The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance OpenAI project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance OpenAI request on Codementor, check out our article.

How much does it cost to hire a freelance OpenAI developer?

We don’t charge anything when you post a freelance hiring request for OpenAI developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.

What makes Codementor OpenAI developers different?

We do a comprehensive technical and communications screen of all OpenAI developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing OpenAI developers’ user satisfaction rates.

What happens if I’m not happy with the freelancer’s work?

As a platform, we strive to ensure you’re always happy with your OpenAI project’s results. If you’re unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.

For more answers to frequently asked questions, see here.

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