Hire the Best OpenAPI

Hello! I'm a Senior Software Engineer with 6+ years of experience building scalable and maintainable systems. I specialize in Back-End development, focusing on FastAPI, PostgreSQL, and microservice architecture with event-driven and asynchronous design patterns. Frameworks & Technologies: - Back-End: FastAPI, Flask, Django, NodeJS, ExpressJS - Front-End: ReactJS, VueJS - Databases: PostgreSQL, MongoDB, Redis - Tools: Docker, Linux, Git (GitHub/GitLab) Services I Offer: - Back-End Development - Deployment & Hosting (VPS, CI/CD) - Consulting & Mentoring Looking forward to working with you!

I build SaaS products and AI-powered web apps that hold up in production: clean architecture, well-handled edge cases, and code the next developer can actually work with. I work full-stack: Next.js on the frontend, Laravel or Node.js on the backend whichever fits your stack. My focus is getting the fundamentals right data modeling, API design, auth, and error handling so what I ship keeps working after launch, not just in the demo. I'm comfortable building from scratch or going into an existing codebase to extend and stabilize it. What I Build → AI-powered SaaS - multi-tenant architecture, subscription billing, LLM features built into the product, not bolted on → Full-stack applications - Next.js frontend, Laravel, Node.js, or FastApi backend, REST APIs → Internal tools - custom dashboards, data pipelines, role-based systems AI Integration Into SaaS → OpenAI API & Claude API - chat, completions, function calling, structured outputs → RAG systems - vector search, knowledge base ingestion, context-augmented responses → AI features inside your SaaS - smart search, content generation, AI assistants → Production-ready - proper error handling, retries, rate limiting, token cost optimization Recent work Sequan - B2B Escrow Platform (Next.js 14, Prisma, PostgreSQL): built a complete backend into an existing 30-page frontend auth, wallet, document upload, email notifications, and a milestone-based payment flow. All three milestones delivered on schedule. MyRunStory - AI Fitness SaaS (Next.js, Strava OAuth, OpenAI, Stripe, Redis): syncs workout data from Strava, analyzes performance trends, and generates personalized AI coaching, with full Stripe subscription billing. StockBot ID - AI Stock Analyst (Python, FastAPI, Claude, ChromaDB): a real-time analysis tool with a full RAG pipeline scrapes and embeds news, injects context into Claude prompts for buy/sell signals, with technical-indicator charts, watchlists, and price alerts. Tech Stack Frontend: Next.js, React, TypeScript, Tailwind, Shadcn Backend: Laravel, Node.js, Python, Express, NestJS, Redis Database: PostgreSQL, MySQL, Supabase, MongoDB Auth: NextAuth, Laravel Sanctum, Clerk, JWT, RBAC Payments: Stripe, Laravel Cashier Deploy: Docker, AWS, Vercel, Railway How I work I take ownership from architecture to deployment. You'll get clear milestones, honest timelines, code that's documented and maintainable, and steady communication throughout no disappearing mid-project. Have a project in mind? Send me the details I'll tell you honestly if it's a fit before we start.

Build Scalable Enterprise Systems with a CTO Mindset | Java Spring Boot & Full-Stack Expert High-quality code is not an expense—it’s an investment. I don’t just write endpoints; I architect systems that scale with your business. With a deep focus on the Java ecosystem and modern web technologies, I help startups and established companies turn complex requirements into robust, production-ready solutions. Whether you are building an MVP or scaling a microservices-based platform, I ensure your backend is secure, fast, and maintainable. What I Bring to Your Project: ✅ Strategic Architecture: Designing scalable systems using Spring Boot, focusing on Clean Architecture and SOLID principles. ✅ Security First: Implementing industry-standard security with Spring Security and JWT to protect your data. ✅ Performance & Optimization: Leveraging PostgreSQL, Redis, and optimized query logic for high-load applications. ✅ Seamless Integration: Connecting your system with third-party APIs, payment gateways (like PayZo), and automated services. ✅ Mentorship & Leadership: As a CTO at heart, I ensure the development process follows best practices, making the code easy to handover or scale. Core Tech Stack: ● Backend: Java, Spring Boot (Web, Security, Data JPA, Cloud), NestJS, Rust. ● Frontend: React.js, TypeScript, Tailwind CSS. ● Mobile & Desktop: Tauri. ● Infrastructure: Docker, PostgreSQL, Redis, RESTful API Design. Recent Success: Successfully delivered a high-performance Bookstore Management system with complete API documentation (Swagger/Postman) and 100% client satisfaction on Upwork. If you’re looking for a developer who understands business goals as well as they understand code — let's have a chat and build something great together.

Hi, I'm Shivam, a passionate and detail-oriented Full-Stack Developer specializing in building modern, high-performance web applications using React, Next.js, Node.js, and TypeScript. My goal is to translate your vision into clean, scalable, and efficient code. Whether you're looking to build a complex platform from the ground up or optimize an existing application, I bring the technical expertise and dedication needed to deliver outstanding results. Here are a few highlights of my experience: I engineered a secure, full-stack document collaboration platform using React, TypeScript, and Python (FastAPI), implementing features like a multi-format file previewer and real-time commenting. I have hands-on experience developing and optimizing full-stack features with Next.js and Node.js, focusing on efficient API integration and Server-Side Rendering (SSR). I am proficient in building robust backends with modern frameworks like Cloudflare Workers and Hono, and I have experience with both SQL (PostgreSQL) and NoSQL (MongoDB) databases. I hold a Bachelor's degree from the prestigious Indian Institute of Technology (IIT) Guwahati and have a strong foundation in computer science fundamentals, demonstrated by solving over 1000+ problems on various competitive programming platforms. I am excited to take on new challenges and help you achieve your project goals. Let's connect and discuss how I can bring value to your team.

I used to be the person on the support team fielding the same integration question five times a day - because the docs never explained it properly. That's what pulled me into technical documentation engineering. Not theory. The actual gap between what a product does and what a developer or non-technical end-user can figure out from the docs alone. Since then, I have spent my time cleaning up that gap for SaaS companies. I write and structure API documentation that developers can actually follow without pinging support - OpenAPI/Swagger specs, endpoint references, authentication guides, quickstarts, and the kind of "Getting Started" pages that stop a new user from bouncing in the first five minutes. A good chunk of my recent work has also been in n8n - documenting custom nodes, workflow logic, and automation setups so that teams (and their clients) understand exactly what's running under the hood and why. I like this kind of work because it sits right at the intersection of technical accuracy and plain-English clarity - you need both, or the doc is useless. {What I bring to your project}: - API documentation (OpenAPI/Swagger, REST, Postman collections) - SaaS product docs, help centers, and onboarding guides - n8n workflow and node documentation - Rewriting/auditing existing docs that are outdated, inconsistent, or just confusing If your product works but your documentation is quietly costing you support tickets, churn, or dev time - that's exactly the kind of mess I like sorting out. Send me a message and tell me what you're working with. ------------------------------------------------------------------- {My Background and Skillset} With a strong background in software engineering and web development, I understand the systems behind the documentation. This allows me to work directly with APIs, codebases, product teams and technical stakeholders to create accurate, well-structured documentation that stays useful as products evolve. 🔹 User Guides | How-to Guides I create clear, task-focused documentation that helps users understand your product, complete workflows efficiently, and reduce dependency on support teams. ✅ User guides ✅ How-to guides ✅ Step-by-step tutorials ✅ Product onboarding guides ✅ Feature walkthroughs ✅ Knowledge base articles ✅ FAQs and troubleshooting guides ✅ Internal process documentation ✅ User manuals ✅ Visual workflows and screenshots 🔹 API Documentation (OpenAPI / Swagger Expert) I create complete, production-ready API documentation that includes: ✅ Clear endpoint descriptions ✅ Request body parameters ✅ Query parameters & path parameters ✅ Authentication flows (JWT, OAuth, API Keys) ✅ Response structures with status codes ✅ Error codes with detailed schemas ✅ Properly defined data models ✅ Example requests & responses ✅ Postman collections ✅ SDK usage examples I work extensively with: Markdown • YAML • JSON • OpenAPI • Swagger • Redocly • Postman • GitHub ▪︎ ReadMe • Google Docs ▪︎ Zendesk • Docusaurus Your APIs will not only function well - they will be understood instantly. 🔹 Developer & Technical Documentation I create: ✅ Developer Guides ✅ API References ✅ SDK Documentation ✅ Integration Guides ✅ Database Documentation (SQL & NoSQL) ✅ System Architecture Documentation ✅ Technical Blogs & Articles ✅ Internal Engineering Documentation ✅ System Operating Procedures (SOPs) ✅ User Manuals ✅ How-To Guides ✅ Step-by-Step Tutorials Whether your audience is developers, internal teams or non-technical users - I adapt tone, depth and structure accordingly. 🔹 Developer Portals & Documentation Platforms I build structured, branded documentation portals using: ✅ Redocly ✅ ReadMe ✅ GitBook ✅ Docusaurus ✅ Mintlify ✅ Stoplight ✅ Confluence ✅ GitHub I ensure your documentation is searchable, scalable, version-controlled, and beautifully structured. 🔹 Technical & Engineering Strength My technical capabilities allow me to go beyond surface-level writing: ✅ Testing and validating APIs with Postman ✅ Running and testing SDKs ✅ Code commenting and codebase documentation ✅ JavaScript & TypeScript documentation ✅ Python code refactoring & documentation ✅ REST API workflows ✅ JSON, YAML, HTML, CSS ✅ Database structure documentation (SQL | NoSQL) Because I understand the code, I document it accurately. ----------------------------------------------------------------------------------- ##TechnicalDocumentationEngineering #TechnicalWriting #TechnicalDocumentation #UserDocumentation #UserGuides #APIDocumentation #OpenAPI #Swagger #SOPWriting #KnowledgeBase #DeveloperDocumentation #InstructionManual #ProcessDocumentation #SoftwareDocumentation #Markdown #GitBook #n8n #n8nAutomation

Looking for senior Full Stack developers with real production experience? We build and maintain Next.js, React, Node.js, TypeScript, PostgreSQL, Supabase, AI, and AWS applications that scale. From SaaS platforms to enterprise systems, we own the complete product lifecycle. We are a senior engineering team 𝗔𝗪𝗦 & 𝗔𝘇𝘂𝗿𝗲 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 with 8+ years of experience building scalable 𝗳𝘂𝗹𝗹 𝘀𝘁𝗮𝗰𝗸 𝘄𝗲𝗯 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀, 𝗦𝗮𝗮𝗦 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀, 𝗔𝗜 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀, and 𝗰𝗹𝗼𝘂𝗱 𝗶𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 for startups and businesses across the US, UK, and EU. We take full ownership of every project, from architecture and development through deployment, testing, optimisation, and long-term maintenance. 𝗪𝗵𝗮𝘁 𝗪𝗲 𝗕𝘂𝗶𝗹𝗱 We build custom web applications and SaaS platforms designed for long-term scalability. Whether you're launching a new product or improving an existing one, we focus on clean architecture, maintainable code, performance, and reliability instead of shortcuts. On the 𝗳𝗿𝗼𝗻𝘁𝗲𝗻𝗱 we build with React, Next.js, TypeScript, Tailwind CSS, and modern component libraries. Our 𝗯𝗮𝗰𝗸𝗲𝗻𝗱 services are built using Node.js, NestJS, Express, Python, FastAPI, Go, and .NET depending on the project requirements. We work extensively with PostgreSQL, MongoDB, Redis, DynamoDB, Supabase, and Firebase. We regularly develop production SaaS applications featuring authentication, multi-tenancy, subscription billing, role-based access control, dashboards, REST APIs, GraphQL, server actions, background jobs, queues, file storage, search, notifications, and third-party integrations. 𝗙𝗼𝗿 𝗔𝗜, we build RAG pipelines, AI chatbots, LLM integrations, document intelligence systems, AI agents, MCP servers, and workflow automation using OpenAI, Claude, AWS Bedrock, LangChain, n8n, and custom orchestration frameworks. We integrate AI where it adds measurable value instead of using it as a buzzword. We have also delivered 𝐯𝐨𝐢𝐜𝐞-𝐭𝐨-𝐯𝐨𝐢𝐜𝐞 and 𝐭𝐞𝐱𝐭-𝐭𝐨-𝐭𝐞𝐱𝐭 conversational 𝐀𝐈 agents using 𝐄𝐥𝐞𝐯𝐞𝐧𝐋𝐚𝐛𝐬, 𝐃𝐞𝐞𝐩𝐠𝐫𝐚𝐦, 𝐖𝐡𝐢𝐬𝐩𝐞𝐫, and production LLMs, enabling natural real-time conversations for end users. 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀 is a core part of our delivery. We work across AWS, Azure, GCP, and Hetzner using EC2, ECS, Lambda, RDS, S3, API Gateway, CloudFront, Cognito, CloudWatch, Docker, Kubernetes, Terraform, GitHub Actions, and CI/CD pipelines to ensure reliable deployments and scalable infrastructure. 𝗙𝗼𝗿 𝗽𝗮𝘆𝗺𝗲𝗻𝘁𝘀, we integrate Stripe, PayPal, Razorpay, and custom billing workflows including subscriptions, one-time payments, marketplace payouts, invoicing, and webhook automation. 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗨𝘀 • Production-ready architecture, not quick prototypes. • Clean, maintainable, well-documented code. • Clear communication and regular progress updates. • End-to-end ownership from planning to deployment. • Long-term support, optimisation, and feature development. 𝗪𝗲 𝗔𝗿𝗲 𝗣𝗿𝗼𝗯𝗮𝗯𝗹𝘆 𝗡𝗼𝘁 𝘁𝗵𝗲 𝗥𝗶𝗴𝗵𝘁 𝗙𝗶𝘁 𝗜𝗳 You need the cheapest option available. We optimise for quality, architecture, and long-term maintainability rather than the lowest quote. You need someone who simply writes code without considering scalability, security, or future maintenance. You expect immediate availability without planning or collaboration. If you're looking for a senior engineering team that takes ownership of your product and treats it like their own, a 20-minute call is usually enough to determine whether we're a good fit. 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 𝗔𝗴𝗲𝗻𝗰𝘆 · 𝗔𝗪𝗦 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗧𝗲𝗮𝗺 · 𝗥𝗲𝗮𝗰𝘁 ·𝗡𝗲𝘅𝘁.𝐣𝐬 · 𝐍𝐨𝐝𝐞.𝐣𝐬 · 𝐏𝐲𝐭𝐡𝐨𝐧 · 𝐆𝐨 · 𝐃𝐨𝐭 𝐍𝐞𝐭 · 𝐅𝐚𝐬𝐭𝐀𝐏𝐈 · 𝐏𝐨𝐬𝐭𝐠𝐫𝐞𝐒𝐐𝐋 · 𝐌𝐨𝐧𝐠𝐨𝐃𝐁 · 𝐑𝐞𝐝𝐢𝐬 · 𝐀𝐖𝐒 · 𝐀𝐳𝐮𝐫𝐞 · 𝐆𝐂𝐏 · 𝐇𝐞𝐭𝐳𝐧𝐞𝐫 · 𝐃𝐨𝐜𝐤𝐞𝐫 · 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 · 𝐓𝐞𝐫𝐫𝐚𝐟𝐨𝐫𝐦 · 𝐑𝐀𝐆 · 𝐌𝐂𝐏 𝐒𝐞𝐫𝐯𝐞𝐫𝐬 · 𝐂𝐥𝐚𝐮𝐝𝐞 𝐀𝐏𝐈 · 𝐎𝐩𝐞𝐧𝐀𝐈 · 𝐀𝐖𝐒 𝐁𝐞𝐝𝐫𝐨𝐜𝐤· 𝐋𝐚𝐧𝐠𝐂𝐡𝐚𝐢𝐧 · 𝐧𝟖𝐧 · 𝐒𝐭𝐫𝐢𝐩𝐞 · 𝐑𝐚𝐳𝐨𝐫𝐩𝐚𝐲 · 𝐏𝐚𝐲𝐏𝐚𝐥 · 𝐄𝐥𝐞𝐯𝐞𝐧𝐋𝐚𝐛𝐬 · 𝐖𝐡𝐢𝐬𝐩𝐞𝐫 · 𝐕𝐨𝐢𝐜𝐞 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬 · 𝐓𝐞𝐱𝐭-𝐭𝐨-𝐓𝐞𝐱𝐭 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬 · 𝐂𝐨𝐧𝐯𝐞𝐫𝐬𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐀𝐈