Hire the Best Back-End Developers

In my opinion, programming languages and frameworks are tools that require deep learning. Proper UX and building architecture are crucial for creating high-quality products. My priorities include building stable, efficient, scalable, and reusable functionality. My strongest programming languages are in JavaScript, PHP and Java. I've built a system that handle data for about 500 users per day (~1m records). I also have experience with the following skills: - JavaScript: Node.js, TypeScript, Nest.js, Next.js, React.js, Angular 2. - PHP: Laravel, Yii, Yii2. - Java: Spring Boot - Database: Firebase, PostgreSQL, Mongodb, MySQL, SQLite - Cloud Architecture: GCP - UI/UX and Frontend: HTML, CSS, Tailwind CSS, Bootstrap and another libraries like ShadcnUI, MaterialUI. - AI Agent: Claude Code As a independent developer, I am capable of handling jobs that require creating, improving, or editing implementations within a limited timeframe. Thank you for your attention, and rest assured that I will not let you down.

⏳ Saved founders and users 1000+ hours through fast-loading apps and reliable AI integrations across 7+ SaaSes & Marketplaces 🎖️Top-rated Senior Backend Developer with 7 years of experience. Focused on Multi-Tenant/Marketplace projects and AI Agents(or both) 🔧 I am best at making complex DB queries fast and AI integrations and agents that strike the balance between speed and reliability. 🫡 WHY ME: I like to help you solve your technical challenges by marrying them to business outcomes. Where most developers exist in a bubble of just writing code, I'd also like to implement solutions that would help you succeed. What you'll get: ✅ Jargon-free, NO BS, no-nonsense communication style. Talking the technical to the non-technical. ✅ Zero micro-management: I can think, plan, and propose solutions on my own, yet your input is much welcomed. Your time is better spent marketing or managing the business. ✅ Fluent English Freelancer who communicates ideas in a way that makes business sense 🙌 Industries worked with: Marketplace Style Apps(Jobs, Real Estate, etc), EdTech, FinTech, Integrations 📚 STACK: As a backend developer, I specialize in Node.js, TypeScript, MongoDB, a bit of SQL too, where needed, Trpc, and a bit of Express when needed, Zod, a bit of Next.js and React where needed, Nginx, and Digital Ocean, and a bit of AWS/GCP when needed 💯. 💪🏼 EXTRA EXTRA :) Here are more specific things I'm good at: 📌 Complex MongoDB aggregations designed for querying large amounts of data in a fast way 📌 Making MongoDB typesafe and integrating it with TypeScript and Zod 📌 Experience with nginx, DNS servers & Virtualmin 📌 Web sockets, monorepos - integrated one DB with 2 backends: the main app and our internal dashboard 📌 AI Backend integrations - utilized AI in the backend for data generation & transformation 📌 Experienced with web scraping and external rest api’s 📌 Familiarity with security vulnerabilities such as CSRF, brute force, SQL injections, etc. 📌 Experience with stronger than JWT encryption systems, such as Passetto 📌 Database Migrations: SQL to SQL or SQL to MongoDB 🏁PPS: For examples of my work, make sure to see my portfolio or my intro video, which go into much more detail 📥 JUST MESSAGE ME: Now that you're convinced I'm good at this backend thingy, shoot me a message to start working together 🤝

Senior Node.js Backend Engineer — Distributed Systems, Event-Driven Microservices, AWS I design and build backend systems for SaaS and logistics platforms that need to handle real production load: event-driven microservices, async job pipelines, and APIs that stay fast and reliable as traffic grows. Over 8 years, I've cut API latency 30-40% and improved deployment reliability across four production systems by redesigning caching layers, async job pipelines (RabbitMQ, BullMQ), and CI/CD. I work fluently with Kafka, RabbitMQ, and AWS at production scale, and I use AI-assisted workflows (Cursor, Claude Code) to move faster without cutting corners on code quality or review rigor. Recent work includes: • DLX (Scitara) – secure backend APIs and a new schema-metadata service for scientific workflow integration • Supply Match – distributed backend for real-time shipment matching using asynchronous processing • Rize – real-time chat service (Socket IO) for a gaming platform, with a 40% API latency reduction via caching and background jobs • Home Inspector Tech – WebSocket-based real-time communication layer with Redis-backed state • Botevo – REST API integration for industrial IoT hardware/software, delivered on a fixed 3-week timeline I also bring hands-on fintech/payments experience: end-to-end Stripe and Razorpay integrations, including webhook reconciliation and idempotent transaction handling to prevent duplicate charges. Where I help clients most: • Designing event-driven microservices architecture (RabbitMQ, Kafka, CQRS) • Building and hardening REST/GraphQL APIs • Performance optimization – caching, query tuning, async processing • AWS infrastructure (Lambda, ECS, S3), Docker, Kubernetes, Terraform, CI/CD • Auth & security (JWT, OAuth2, RBAC, rate limiting, API gateways) Tech stack: Node.js, NestJS, TypeScript, Express, GraphQL, gRPC, Redis, PostgreSQL, MongoDB, RabbitMQ, Kafka, AWS, Docker, Kubernetes, Terraform. I work well in fully remote, async-first teams – 4+ years of documentation-driven development, PR-based workflows, and cross-timezone collaboration. If you're scaling a backend, untangling a slow API, or need a senior engineer who can own a service end-to-end, let's talk.

Great products are built on reliable backend systems. I help startups and businesses design, build, and scale backend applications that are secure, maintainable, and production-ready. Whether it's architecting a new platform from scratch, modernizing an existing system, or building high-performance APIs, I focus on creating software that performs reliably as products grow. Over the past several years, I've worked on SaaS platforms, AI-powered products, and enterprise applications, designing backend architectures, cloud infrastructure, databases, and distributed systems that support thousands of users and complex business workflows. Backend Development Backend engineering is my primary area of expertise. I build scalable services with a strong emphasis on clean architecture, maintainability, security, and performance. Technologies Node.js: NestJS, Express.js, Fastify Python: FastAPI, Django, Flask Java: Spring Boot Rust: Actix Web, Axum Backend Expertise REST APIs GraphQL APIs Microservices Architecture Authentication & Authorization (JWT, OAuth, RBAC) Background Workers & Job Queues Event-Driven Systems WebSockets & Real-Time Applications Payment Gateway Integrations Third-Party API Integrations File Processing Pipelines Email & Notification Systems High-Performance Backend Services API Design & Versioning Caching Strategies Rate Limiting Distributed Systems Databases & Data Engineering Building scalable applications starts with designing data correctly. PostgreSQL MySQL MariaDB MongoDB Redis Firebase / Firestore Database Design Query Optimization Indexing Transactions Database Migration Data Modeling Cloud & DevOps I build systems that are easy to deploy, monitor, and scale. Cloud Platforms AWS (EC2, ECS, Lambda, API Gateway, S3, RDS, CloudWatch, IAM) Google Cloud Platform Microsoft Azure DevOps Docker Nginx GitHub Actions CI/CD Pipelines Linux Server Administration Performance Monitoring Logging & Observability Environment Management Production Deployments Software Engineering Practices I believe maintainable software is just as important as working software. Clean Architecture SOLID Principles Domain-Driven Design (DDD) Test-Driven Development (TDD) Design Patterns Code Reviews Performance Optimization Secure Backend Development Scalable System Design AI Engineering While backend development is my core specialization, I also build AI-powered systems when products require intelligent automation or conversational capabilities. AI Expertise AI Agents Multi-Agent Systems Retrieval-Augmented Generation (RAG) LLM Integrations AI Workflow Automation AI Chat Applications Voice AI AI Technologies LangChain LangGraph LlamaIndex OpenAI Claude Mistral DeepSeek Pinecone ChromaDB FAISS Supabase Vector Whisper ElevenLabs LiveKit Vapi Frontend When projects require full-stack ownership, I also build modern web applications using: React Next.js TypeScript Tailwind CSS ShadCN UI Material UI Redux Zustand Programming Languages TypeScript / JavaScript Python Java Dart Working knowledge of Rust, Kotlin, Swift, and C. Why Clients Work With Me ✔ Strong expertise in backend architecture and scalable API development. ✔ Experience building cloud-native applications on AWS, GCP, and Azure. ✔ Focus on clean, maintainable code that supports long-term product growth. ✔ Practical experience integrating AI into production systems without compromising reliability. ✔ Clear communication, strong ownership, and a commitment to delivering production-ready software. If you're looking for a backend engineer who can design scalable systems, build reliable APIs, optimize cloud infrastructure, and integrate modern AI capabilities when needed, I'd be happy to help.

🚀 𝗧𝗼𝗽 𝟯% 𝗙𝗿𝗲𝗲𝗹𝗮𝗻𝗰𝗲𝗿 | 𝟭𝟬𝟬% 𝗖𝗹𝗶𝗲𝗻𝘁 𝗦𝗮𝘁𝗶𝘀𝗳𝗮𝗰𝘁𝗶𝗼𝗻 | 𝟰,𝟬𝟬𝟬+ 𝗛𝗼𝘂𝗿𝘀 𝗧𝗿𝗮𝗰𝗸𝗲𝗱 Building a SaaS product? Scaling an existing platform? Adding AI to your application? Your backend shouldn't slow your business down. Whether you're launching an MVP, scaling your SaaS, or adding AI features, you need an architecture that supports growth, not one that becomes technical debt. For the past 5+ years, I've helped startups and growing companies build production-ready backend systems for SaaS platforms, AI-powered applications, and distributed systems. Whether you're launching an MVP, modernizing an existing platform, or preparing for rapid growth, I focus on building solutions that remain reliable, maintainable, and scalable as your business evolves. Beyond delivering features, I help make architectural decisions that keep your product scalable, reduce future development costs, and enable your team to move faster as the business grows. ⭐ 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 ✅ Scalable backend architecture designed to support long-term product growth ✅ AI integration done right, with OpenAI and Claude APIs integrated into existing products without creating unnecessary complexity ✅ Multi-tenant SaaS expertise, including secure tenant isolation, RBAC, authentication, and authorization ✅ High-performance backend systems built to handle growing traffic, complex workflows, and large datasets ✅ Clear communication and reliable delivery, with consistent updates and a collaborative approach throughout the project 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 Backend • Node.js • NestJS • TypeScript • Express.js Architecture • Multi-tenant SaaS • Microservices • Event-Driven Architecture • Distributed Systems • REST APIs • GraphQL • System design and backend architecture AI • OpenAI API • Claude API • AI Agents • Workflow Automation • LLM Integration Databases • MongoDB • PostgreSQL • MySQL • Redis Infrastructure • Docker • CI/CD • Performance Optimization 𝗛𝗼𝘄 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 • Build scalable backend APIs from scratch • Design and implement SaaS architectures • Integrate AI features and LLM workflows into existing products • Develop secure authentication and authorization systems • Build microservices and event-driven architectures • Optimize backend performance and database queries • Refactor legacy applications for scalability and maintainability • Design clean, well-documented REST and GraphQL APIs The result is a backend that's easier to maintain, faster to extend, and built to support your product as your business grows. 𝗪𝗵𝗮𝘁 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘀𝗮𝘆 ⭐⭐⭐⭐⭐ “Excellent collaboration, diligent and dedicated to the project, worked as efficiently as possible and was available when needed.” ⭐⭐⭐⭐⭐ “Skilled and good collaborator.” Whether you're building your first MVP, scaling a successful SaaS platform, or introducing AI capabilities into an existing product, you'll get a backend that's designed for long-term growth—not just something that works today. 𝗟𝗲𝘁'𝘀 𝗯𝘂𝗶𝗹𝗱 𝗮 𝗯𝗮𝗰𝗸𝗲𝗻𝗱 𝘁𝗵𝗮𝘁 𝘀𝘂𝗽𝗽𝗼𝗿𝘁𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝘁𝗼𝗱𝗮𝘆 𝗮𝗻𝗱 𝘀𝗰𝗮𝗹𝗲𝘀 𝘄𝗶𝘁𝗵 𝘆𝗼𝘂𝗿 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝘁𝗼𝗺𝗼𝗿𝗿𝗼𝘄. 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝘁𝗼 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁.

I help companies build reliable backend systems, integrate third-party services, and turn complex business requirements into scalable software. Over the last 10+ years, I've worked on SaaS platforms, marketing systems, CRM integrations, analytics, payment gateways, and internal tools. My primary stack is Node.js, TypeScript, PostgreSQL, and Laravel, with a strong focus on API design, integrations, and backend architecture. Some of the projects I've worked on include: • REST & GraphQL APIs • Payment gateway integrations • OAuth, JWT, and secure authentication • CRM and third-party API integrations • Analytics and reporting platforms • AI-powered features and automation • Docker and AWS deployments I enjoy working on projects where backend performance, clean architecture, and maintainability matter. Whether it's building a new API, integrating external services, or improving an existing platform, I focus on delivering solutions that are reliable and easy to maintain. If you're looking for someone who communicates clearly, takes ownership, and enjoys solving technical challenges, I'd be happy to discuss your project.