Upwork home
Sign up
Secondary

Hire the best OpenAPI

More than 2,000 reviews on G2
Rating is 4.6 out of 5.
4.6/5
of Upwork by G2 peer reviewers
Hire freelancers
Hamza I.

Lahore, Pakistan

$40/hr
5.0
68 jobs
Are you looking for a Bubble.io developer who can turn your startup idea into a scalable, production ready web app fast and efficiently? I help startups, SaaS founders, and growing businesses build, launch, and scale high performance web applications with Bubble.io combining speed, structure, and smart API integrations for results that drive growth - What I Build: 🔹 MVPs & SaaS Platforms — Full featured MVPs and SaaS tools built for speed, scalability, and growth 🔹 Custom CRMs & Marketplaces — Multi user dashboards, internal tools, and marketplace systems 🔹 AI Integrated Apps — Intelligent workflows powered by OpenAI 🔹 API Integration & Automation — Stripe, Webhooks, and third party API systems 🔹 Responsive Web Apps — Pixel perfect layouts using Bubble’s new responsive engine 🔹 Performance Optimization — Speed tuning, workflow debugging, and scalable database design - Tech Stack & Expertise ✅ Bubble.io Advanced Development — SaaS, CRMs, Marketplaces ✅ ChatGPT / OpenAI Integration ✅ API Integrations & Webhooks ✅ Scalable Database Architecture ✅ Firebase Authentication, OAuth, Privacy Rules ✅ Responsive UI/UX & App Optimization ✅ Maintenance & Version Control -Why Clients Hire Me ✔️ 4+ Years of Full Time Experience in Bubble.io ✔️ Proven success across 15+ MVPs & SaaS platforms ✔️ Deep understanding of UX, scalability, and performance ✔️ Clean documentation, maintainable databases & workflows ✔️ Excellent communication, fast delivery, and ongoing support - Let’s Build Something Exceptional Whether you’re launching your MVP, improving performance, or integrating AI into your product, I’ll help you build a secure, efficient, and future ready Bubble application that scales with your business.
  • OpenAPI
  • Bubble.io
  • API Integration
  • Mobile App Design
  • Database
  • ChatGPT
  • SaaS Development
  • App Marketplace
  • Stripe API
  • Database Design
  • UX & UI
  • Airtable
  • Responsive Design
  • Web Development
Hafsa H.

Lahore, Pakistan

$35/hr
5.0
31 jobs
Cloud Machine/Deep learning engineer and CS Educator with over 5 years of experience. I have deployed Big Data ML models using AWS SageMaker, AWS GLUE and AMAZON EMR. I have successfully deployed ML pipelines through AWS, GCP and Azure Machine Learning. A few years ago, I obtained Machine Learning and Deep Learning Nanodegrees from Coursera, and have quickly become an expert in Neural Networks and Computer Vision. I use Python, Keras, and Tensorflow to train my Deep Neural Networks, and analyze the data using Python, Numpy, Pandas, Scikit Learn, Matplotlib, etc... I have over 7 years of experience in coding and web/mobile development. I helped put myself through college with freelance web dev work, and gained more coding experience during my masters. I am well versed in Python, HTML, CSS, JavaScript, PHP, SQL, and database design. I am proficient in Java, Visual Basic, VBA, and have created several Android apps. I also have experience in Windows and Linux system administration. I am proficient in Google cloud, aws and utilities like Git, Jira and bash etc CS education is more about my passion than pocket. I love teaching Information and communication technology(ICT), Computer Science, Programming lessons for kids and Python programming. Distance teaching has enabled me to explore and use multiple e-learning tools. I am proficient in several learning management systems (e.g., moodle, Openedx) I have set up and used both of them for my courses. Here is what to do next Send me a note with a bit about your company / Project and track record. If it seems like a good fit we will schedule a call.
  • OpenAPI
  • Machine Learning
  • Chatbot
  • Amazon SageMaker
  • pandas
  • Python
  • Computer Vision
  • Azure Machine Learning
  • ChatGPT
  • Data Visualization
  • Google App Engine
  • Amazon ECS
Titus B.

Oradea, Romania

$50/hr
5.0
20 jobs
👋 Hey there! I'm a Full-Stack Developer (contractor / freelancer) with 𝟔+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 in developing Web Applications and continuously growing by learning new technologies and improving professional & personal skills while implementing high-quality, performant, scalable, maintainable and reliable web applications and bringing enthusiasm, positivity and joy to the others. ✅ My skills: • NodeJS (JavaScript + TypeScript) • ReactJS, AngularJS, VueJS, SAP UI5, Bootstrap, Google MaterialUI • ExpressJS, NestJS, LoopBack 3 & 4, FastifyJS • Redis, SequelizeJS, TypeORM, Prisma, Mongoose (PostgreSQL, MongoDB, YugaByte, MySQL) • RxJs, GraphQL, OpenAPI (Swagger), RabbitMQ • Supertest, Mocha, Chai, Jest, Sinon, Proxyquire • Docker, Kubernetes, Vagrant ✅ Software Architecture: • Functional, Reactive, Imperative programming • Microservices • Domain-Driven Development (DDD) ✅ Management methodologies: • Kanban / Agile (Scrum) • Pair programming ✅ I also got a little bit of experience with the following languages and technologies: • Serverless Framework (Amazon AWS S3, Lambda, Cognito) • Google Cloud Platform (GCP) • Twig 🌎 Only interested in remote work. 🤝 Let me know how my expertise can help your business and 𝐥𝐞𝐭’𝐬 𝐜𝐨𝐧𝐧𝐞𝐜𝐭!
  • OpenAPI
  • Node.js
  • Python
  • JavaScript
  • TypeScript
  • ExpressJS
  • NestJS
  • PostgreSQL
  • MySQL
  • Sequelize
  • Swagger
  • MongoDB
  • React
  • Angular
  • Vue.js
Ivan K.

Chernihiv, Ukraine

$35/hr
5.0
19 jobs
Hi, I have a great experience in PHP and MySQL development. For about 10 years, I've been working as a Web Developer. Ready to help you :)
  • OpenAPI
  • PostgreSQL
  • MySQL
  • HTML
  • HTML5
  • API
  • PHP
  • JavaScript
  • SQL
  • CSS
  • SOAP
  • API Integration
  • CodeIgniter
  • Bootstrap
  • Custom PHP
Usman S.

Bahawalpur, Pakistan

$35/hr
5.0
16 jobs
🥇 𝗘𝘅𝗽𝗲𝗿𝘁-𝗩𝗲𝘁𝘁𝗲𝗱 | 𝗧𝗼𝗽 𝟭% 𝗧𝗮𝗹𝗲𝗻𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 👋 𝗡𝗲𝗲𝗱 𝗮𝗻 𝗲𝘅𝗽𝗲𝗿𝘁 𝘁𝗼 𝗯𝘂𝗶𝗹𝗱 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗔𝗜-𝗱𝗿𝗶𝘃𝗲𝗻 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝗼𝗿 𝗿𝗼𝗯𝘂𝘀𝘁 𝗯𝗮𝗰𝗸𝗲𝗻𝗱 𝘀𝘆𝘀𝘁𝗲𝗺𝘀? I help startups and enterprises turn ideas into production-ready software using Python, FastAPI, and the latest in AI—including LLMs, speech AI, and RAG pipelines. 🧠 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 I design and deploy intelligent applications and backend systems. With 10+ years of experience and a Top-Rated Plus badge, I deliver reliable solutions across AI, automation, and API engineering. 🚀 𝐂𝐨𝐫𝐞 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐭𝐢𝐞𝐬 ✅ Backend & API Engineering ▪️ Python (Advanced), Bash ▪️Django, Flask, FastAPI – Web apps, REST & GraphQL APIs ▪️Async Programming, WebSockets, JWT Auth, SQLAlchemy ✅AI & LLM Integration ▪️OpenAI (GPT-4), Claude, Gemini, DeepSeek, Mistral ▪️LangChain, LlamaIndex – context-aware AI workflows ▪️RAG Pipelines – Retrieval-Augmented Generation using vector DBs ▪️Vector Stores: Pinecone, Weaviate, Qdrant, Milvus ▪️Embeddings: OpenAI, Hugging Face Transformers ✅ Voice & Multimodal AI ▪️ElevenLabs – Voice synthesis ▪️Whisper – Speech-to-text ▪️Google TTS, Azure Cognitive Services ▪️Image-to-Text & OCR integration ✅ Automation & Data Engineering ▪️ETL Pipelines, Pandas, NumPy ▪️MySQL, PostgreSQL, MongoDB ▪️Web Scraping, Cron Jobs, Server Automation ✅ Cloud & DevOps ▪️GCP, Azure, AWS Lambda ▪️Docker, Kubernetes, Terraform ▪️CI/CD: GitHub Actions, Jenkins 🚀 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 ✔ 10+ years of results delivering production-grade systems ✔ Clean, modular, and scalable codebases ✔ Strategic tech guidance, not just development ✔ Trusted by long-term Upwork clients (Top Rated Plus) ✔ Transparent estimates and responsive communication 𝐋𝐞𝐭’𝐬 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞 Have an idea or facing a challenge? Click “Invite to Job” or send a message—I’m ready to help you build and launch. 𝑇𝑎𝑔𝑠 𝑡𝑜 𝑓𝑖𝑛𝑑 𝑚𝑒: Senior Python Developer, Full Stack Developer, Backend Developer, API Backend, Tech Lead, Freelance Python Developer, Tech Lead for AI Projects, AI Developer, AI/ML, Machine Learning, LLM Integration, ChatGPT Developer, OpenAI API, Prompt Engineering, AI-Powered Web Apps, Chatbot Development, NLP, TensorFlow, PyTorch, Vector Database, Pinecone, Weaviate, FastAPI, Django, Flask, Node.js, SQLAlchemy, Docker, Kubernetes, AWS Lambda, GCP, AWS, CI/CD, RESTful API, API Integration, Microservices, Automation, Automated Workflow, ETL Automation, Web Scraping, Data Extraction, Data Mining, Pandas, NumPy, SaaS MVP, Full Stack (Python + React)
  • OpenAPI
  • Python
  • Scripting
  • Django
  • Flask
  • Database
  • Web Scraping
  • RESTful API
  • FastAPI
  • Web Development
  • LLM Prompt Engineering
  • LangChain
  • AWS Lambda
  • Node.js
  • Google Cloud Platform
Elijah G.

Austin, Texas

$70/hr
5.0
13 jobs
UPWORK TOP 1% | EXPERT-VETTED Tired of working with freelance developers who overpromise and never deliver? Hello! I'm Elijah "Lococoder" - Upwork's most proven, top-rated independent developer. 🔑 KEY FACTS - Professional full-stack developer with over 5+ years of Silicon valley and Fortune 500 experience - I develop scalable, beautiful and innovative Web and Mobile Applications used by 10k+ 𝘂𝘀𝗲𝗿𝘀 daily - I've worked with startups across the world to bring their MVPs to market AND generate amazing revenue My specialty is leveraging the power of AI to 𝘁𝗿𝗮𝗻𝘀𝗳𝗼𝗿𝗺 and 𝗿𝗲𝘃𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝗶𝘇𝗲 your business. 💻 SERVICES: 📱 𝗔𝗹𝗹-𝗶𝗻-𝗼𝗻𝗲 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: - No need to hire multiple teams or firms. - I'll handle all aspects of development - Designs, Frontend, Backend, QA, and Project Management - This reduces cost overhead and allows you to focus on your business! ⚙️ 𝐀𝐈 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: - Integrate AI seamlessly into your existing processes and save time and money. - I can help streamline operations and enhance efficiency, so you can focus on the things that matter. ⌨️ 𝐀𝐈 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: - I don’t believe in one-size-fits-all solutions. - Instead, I'll develop a customized software solution tailored precisely to your needs. WHY HIRE ME? 1) Expertise: I'm a real Software Developer - I have real-world, professional insights from working as a Lead Engineer for 5+ years 2) End-to-End Support: From ideation to deployment and beyond, I provide comprehensive support. I guarantee seamless integration and long-term success. 3) Innovation & Quality: I leverage the power of Cursor AI to speed up development and decrease your time to market 4) ROI: I'm committed to delivering measurable results that drive growth and efficiency, ensuring that your investment in AI development yields tangible benefits. Schedule a free consultation with me today where we can: 1) Identify key areas of automation in your business 2) Discuss all the latest AI solutions on the market 3) Learn about how AI can automate your workflow and drive unprecedented growth
  • OpenAPI
  • Python
  • TypeScript
  • React
  • Software Development
  • Next.js
  • CSS
  • HTML
  • Tailwind CSS
  • Django
  • Web Application
  • Web Application Development
  • JavaScript
  • AI Consulting
  • AI Development

How it works

Post a job for free Post a job

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

How do I hire a OpenAPI on Upwork?

You can hire a OpenAPI on Upwork in four simple steps:

  • Create a job post tailored to your OpenAPI project scope. We’ll walk you through the process step by step.
  • Browse top OpenAPI talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top OpenAPI profiles and interview.
  • Hire the right OpenAPI 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 OpenAPI?

Rates charged by OpenAPI 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 OpenAPI on Upwork?

As the world’s work marketplace, we connect highly-skilled freelance OpenAPI and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream OpenAPI team you need to succeed.

Can I hire a OpenAPI 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 OpenAPI proposals within 24 hours of posting a job description.

Find more freelancers

Similar OpenAPI Skills

Top cities for OpenAPI in United States

Similar OpenAPI Jobs