Experienced Golang backend developer 🌟 specialising in building scalable, secure RESTful APIs 📡, gRPC services 🚀, and microservices architecture 🏗️ for data-intensive applications. Proficient in Go (Gin, gqlgen) 💻, PostgreSQL optimisation 📊, MongoDB 🗃️, Docker containerisation 🐳, and real-time WebSockets ⚡ for high-throughput systems. Recent work: Designed and deployed RESTful APIs 📝 for a social/group-buying platform at ChipChip, optimising PostgreSQL schemas for 2x faster queries ⏱️ and integrating JWT authentication 🔒. Built production-ready microservices 🛠️ with Docker Compose and CI/CD pipelines ⏩. Key Expertise: Golang development 💾, microservices 🛠️, SQL/NoSQL databases 📈, API optimisation ⚙️, technical testing ✅. Pragmatic collaborator 🤝 focused on reliability 🔧 and clean code ✨. Let's build your next scalable backend 🚧 available immediately ⏰ for remote projects in fintech 💸, e-commerce 🛒, or Web3 🌐.

I am a senior backend developer using the Golang language and all its tools to tie things together. I assure you that you'll be satisfied with the good results, and I'll always meet the deadlines. Looking forward to working together!

Are you seeking a senior backend and blockchain developer to architect your next-generation systems? With deep expertise in Golang, blockchain development (Solana and Ethereum), and distributed systems, I specialize in building robust, scalable backend architectures and smart contracts that power innovative business solutions. Blockchain Development Expertise 1. Solana blockchain development (Rust, Anchor framework) 2. Ethereum smart contract development (Solidity, Vyper) 3. DeFi protocol development and integration 4. NFT marketplace development and token standards 5. Web3 integration and wallet connectivity 6. Blockchain infrastructure and node management Backend Development Specialization 1. Golang backend development and microservices architecture 2. High-performance distributed systems using Kafka and Pulsar 3. Payment systems and API integration 4. gRPC and microservices communication 5. Database design with PostgreSQL, MongoDB, and other data storage solutions Why Me? I leverage cutting-edge development practices and technologies including Golang, Solana, Ethereum, and cloud-native architectures to deliver systems that are not only performant but also maintainable and scalable. With AWS Cloud Practitioner certification, I architect solutions that leverage cloud technologies to enhance scalability, reliability, and security. My approach combines technical excellence with business acumen, ensuring that your project not only meets technical requirements but also delivers real business value. I prioritize clean, well-documented code and robust testing practices to ensure long-term maintainability. Security is fundamental to my development process. I implement comprehensive security measures including authentication, authorization, and data protection protocols to safeguard your applications against potential threats. I'm interested in discussing how my expertise in blockchain and backend development can contribute to your project's success. Let's connect to explore how we can transform your vision into a technically sophisticated and business-effective solution.

Now I am based in Valencia (GMT+1). I don't mind to work in EST / PST timezone I am a Senior Golang Developer with extensive experience in backend development, distributed systems, and high-load applications. Over the years, I have worked on crypto exchanges, trading platforms, brokers, and financial services, as well as general backend solutions for various industries. My expertise includes microservices architecture, API design, performance optimization, and scalable system development. I have a strong interest in fintech and trading systems, where reliability, low latency, and fault tolerance are critical. I have built trading bots, broker applications, and financial platforms that require high availability and precision. My experience also includes optimizing matching engines, REST/gRPC APIs, and financial data processing pipelines. Additionally, I am exploring Web3 and blockchain technologies, with a focus on crypto trading, DeFi, and smart contracts. I am currently learning Solidity and Rust to deepen my understanding of blockchain development and smart contract security. I am open to working on high-performance financial systems, trading solutions, and innovative Web3 projects that push technological boundaries.

I describe myself as a backend focused developer, highly experienced with Go. I can build performant backends ranging from small RESTful APIs to large scale microservices. I can utilize any Go HTTP libraries but mostly try to use stdlib for simple tasks. Aside from backends, I can also use Go to build desktop applications and also games using raylib, and can also build frontends in React. Backend Technologies: → Golang → PostgreSQL, SQLite, MongoDB → Redis → REST, GraphQL, gRPC → Docker Go Frameworks / Libraries: → Gin, Echo, Chi - for servers → Wails + React.js, Fyne - for desktop / mobile apps → Colly - for web scraping → Raylib-go - for games Technical qualifications aside, I am communicative to clients and believe in work honesty. I remain active throughout the day, so you can message me any time. I am very flexible with pricing and strongly root for client satisfaction over money.

Hello, I am Collins Marvin, a professional software engineer with 7 years of experience in software development specializing in fullstack web applications. I've successfully completed trustworthy, scalable, robust and secure web applications and solved clients' problems in a more efficient way by understanding their problems. My languages of trade are PHP and/or Golang for backend, JS,VueJS, and CSS,TailwindCss for frontend. I also enjoy using PHP and Golang frameworks to speed development. I am comfortable working with different timezones, can easily integrate with any team, and deliver quality solutions with a lot of honesty. My Skills - PHP,Laravel - Golang - JS,VueJS,ReactJs - HTML,CSS,TailwindCSS,Bootstrap - AWS,DO,Linode,GCP,VPS Management - MYSQL,CockRoachDB,PostgreSQL,SQLite,MongoDB,MSSQL,Redis - CI/CD (Gitlab, Github, Bitbucket) - Deployment and release engineer - TDD,DDD,BDD - Responsive website design - Server management - Restfull API design and development - GraphQL - gRPC - Design patterns - Git Versioning - Ansible - Relational Database Management - Markdown,YML file - Docker I hope to work with you.

HI I have 13 years of experience in programming (backend). My main programming language is Golang, and I have experience creating microservice applications using Docker, Kubernetes (ECS and GKE), setup CI/CD using GitLab-ci or Jenkins, and most of my projects using Echo framework for APIs and for connecting internal services I use Grpc or Kafka.

🚀 **Senior Golang Developer | Backend Engineer | Team Lead** Looking for a developer who can build scalable backend systems, optimize performance, and lead engineering teams? You're in the right place. I am a Senior Golang Developer with 5+ years of professional experience building high-performance applications, microservices, APIs, and distributed systems. In addition, I have 2+ year of experience leading development teams, mentoring engineers, conducting code reviews, and driving successful project delivery. ### What I Can Help You With ✅ Golang (Go) Backend Development ✅ REST APIs & gRPC Services ✅ Microservices Architecture ✅ High-Performance & Concurrent Systems ✅ PostgreSQL, MySQL, CockroachDB & Redis ✅ Kafka & Event-Driven Architectures ✅ Docker & Containerization ✅ CI/CD Pipelines (GitLab CI/CD) ✅ Cloud Deployments & Infrastructure ✅ Third-Party API Integrations ✅ System Design & Performance Optimization ### Why Clients Work With Me ✔ Write clean, maintainable, and production-ready code ✔ Strong focus on performance, scalability, and reliability ✔ Excellent communication and project ownership ✔ Ability to lead teams and mentor developers ✔ Fast learner who adapts quickly to new technologies ✔ Committed to delivering quality work on time ### Recent Experience * Built scalable microservices handling high-volume transactions * Designed and implemented secure REST and gRPC APIs * Integrated third-party platforms and payment systems * Optimized database performance and application throughput * Led development teams and coordinated project execution * Improved deployment processes through automation and CI/CD I don't just write code—I help businesses build reliable, scalable products that are ready for growth. 📩 Let's discuss your project and turn your ideas into production-ready solutions.

I build production-ready AI agents and full-stack SaaS apps with Golang, React, OpenAI/Claude, RAG, APIs, and cloud infrastructure — so your product can automate workflows, serve users, and scale beyond a demo. You can hire me when you need a developer who understands both backend engineering and practical AI implementation. I help founders, startups, agencies, and businesses turn ideas into reliable systems: AI assistants, workflow automations, internal tools, API platforms, dashboards, and AI-powered SaaS features. What I can build for you: AI Agents & Workflow Automation - Custom AI agents using OpenAI, Claude, Gemini, local/open-source models, OpenClaw, Hermes Agent, LangChain, LangGraph, CrewAI, AutoGen, or custom Go/Python logic - AI assistants for business operations, lead generation, support, research, reporting, scheduling, email, and admin workflows - Telegram, Discord, Slack, WhatsApp, email, and web-based AI agents - API-calling agents that can read data, use tools, update CRMs, generate reports, trigger workflows, and handle multi-step tasks - Human-in-the-loop approval flows for safer AI automation Golang Backend & Full-Stack Development - Golang APIs using Gin, Echo, REST, gRPC, WebSockets, and microservices - Full-stack apps using React, Next.js, TypeScript, dashboards, admin panels, and AI chat interfaces - PostgreSQL, MongoDB, Redis, MySQL, DynamoDB, and vector databases - Background workers, queues, cron jobs, retries, logging, monitoring, and event-driven systems - API integrations with CRMs, payment systems, dashboards, SaaS tools, and internal platforms Cloud, DevOps & Production Deployment - Docker, AWS, GCP, VPS, serverless, CI/CD, and production deployments - LLM token optimization, caching, fallback models, retry handling, and rate-limit protection - Secure API design with JWT, OAuth2, RBAC, rate limiting, and OWASP-aware practices - Monitoring, logging, cost optimization, and maintainable deployment workflows Recent work includes: - Built AI-powered backend APIs for production systems - Optimized Go microservices and improved API performance - Designed event-driven workflows for business automation - Integrated LLM APIs into backend platforms - Built automation flows connecting APIs, databases, and business tools Why work with me: - Strong backend engineering background, not just prompt engineering - Clean, scalable, production-ready code - Practical AI implementation focused on real business workflows - Experience with Golang, Python, React, APIs, databases, cloud, and LLM integrations - Clear communication, regular updates, and maintainable architecture If you need an AI agent, AI SaaS backend, RAG app, full-stack dashboard, workflow automation, or scalable Golang API, send me a message and I’ll help you choose the simplest technical approach that can ship fast and scale safely.

Software engineer with 10+ years of experience in development and devOps. Recent projects: * Fintech project (golang) * Custom connectors for Zapier, Workato, Terraform, Crossplane, Pulumi * Datasets management platform for Computer Vision projects (python) * IoT platform (golang) Skills: golang, python, devops, custom integrations