As an Experienced Full-Stack Developer, I bring a robust and versatile background in modern web and mobile application development. My expertise spans across both frontend and backend technologies, where I have honed my skills in languages like JavaScript, TypeScript, HTML5, and CSS3. I am proficient in leveraging cutting-edge frameworks and libraries such as React.js, React Native, and Angular to create dynamic, responsive user interfaces and mobile applications. My experience with tools like Gatsby and Next.js enables me to build fast, SEO-friendly web applications.
On the backend, I have deep knowledge in Node.js, Python, and PHP, along with a strong command of frameworks like Express, Laravel, Django, and Flask, which allows me to design scalable and efficient server-side applications. My proficiency extends to managing complex state within applications using libraries such as Redux, VueX, and Mobx, ensuring optimal performance and maintainability.
I am skilled in CSS styling, utilizing advanced techniques and frameworks such as Tailwind, Material UI, and SCSS to create visually appealing and consistent designs. My familiarity with tooling platforms like Webpack, Babel, and Storybook allows for streamlined development processes and enhanced collaboration within teams.
In addition to my frontend and backend capabilities, I have substantial experience with CMS integration, working with platforms like WordPress, Drupal, and Shopify to build and manage content-rich websites and e-commerce platforms. My expertise includes headless CMS technologies like Strapi and Contentful, offering flexibility and modern solutions for content management.
My development practices are supported by strong DevOps skills, including cloud services like AWS, Azure, and Google Cloud. I am adept in CI/CD pipelines using Jenkins, CircleCI, and GitHub Actions, and I utilize containerization technologies such as Docker and Kubernetes to ensure consistent and scalable deployment across environments.
I also possess a solid foundation in database management, working across both SQL (MySQL, PostgreSQL, Oracle) and NoSQL (MongoDB, DynamoDB) systems, ensuring data integrity and optimized performance.
Finally, I have a thorough understanding of version control using Git, with extensive experience in collaborative environments using platforms like GitHub, GitLab, and Bitbucket. My ability to manage code repositories and work within distributed teams ensures smooth development workflows and effective project management.
Technical Skills:
Frontend:
➤ Languages: JavaScript, TypeScript, HTML5, CSS3
➤ UI Frameworks: React, React Native, Gatsby, Next.js, Angular, Vue2, Vue3
➤ State Management: Redux, Redux Toolkit, Redux Saga/Thunk, Mobx, VueX, NgRx
➤ CSS Styling: SCSS, LESS, Styled Components, Bootstrap, Tailwind, Material UI, Ant Design
➤ Tooling: Webpack, Babel, Nx, Vite, Storybook
➤ Testing: Jest, Enzyme, React Testing Library, Cypress, Playwright, Selenium
Backend:
➤ Languages: Node, PHP, Python, Java, Ruby
➤ Frameworks: Express, Nest, Tsoa, Laravel, Django, Flask, Spring Boot, Ruby on Rails
➤ Testing: Jest, Mocha, Chai, Cucumber
➤ Documentation: Swagger, OpenAPI
Database:
➤ SQL: MySQL, PostgreSQL, Oracle, RDS
➤ NoSQL: MongoDB, DynamoDB
Cloud & DevOps:
➤ Services: AWS, Azure, GCP, Firebase
➤ CI/CD: Jenkins, CircleCI, GitHub Actions
➤ Containerization: Docker, Kubernetes
➤ Monitoring: Grafana, Splunk, Datadog, New Relic
CMS & E-commerce:
➤ Platforms: WordPress, Drupal, Joomla, Shopify, Magento, WooCommerce
➤ Headless CMS: Strapi, Contentful, Sanity, Ghost
Version Control:
➤ Git, GitHub, GitLab, Bitbucket
Mobile App Development
React
React Native
JavaScript
GraphQL
TypeScript
Node.js
Amazon Web Services
Firebase
MySQL
PostgreSQL
Python
Ruby
Web Application Development
James C.
Chicago, Illinois
$55/hr
5.0
3 jobs
I am a developer with over a decade of experience in Claris FileMaker Pro, FileMaker Server, and the web. I specialize in creating efficient UX/UI designs that streamline productivity and usability. I have extensive experience in team leadership and project management, with communication skills and diligence to complete projects quickly and effectively.
My databases have empowered a range of businesses and organizations to significantly improve workflows, resulting in measurable results including major sales and acquisitions. As examples, my portfolio contains four advanced databases I developed for public-facing collections and archives.
Claris FileMaker
FileMaker WebDirect
JavaScript
HTML
CSS
Database Design
Database
Artificial Intelligence
System Administration
Server Administration
Web UI
App Development
Desktop Application
Database Management System
Software Development
Adam H.
Los Angeles, California
$68/hr
5.0
25 jobs
Full-Stack Developer | AI Automation Architect | Custom Integrations
Hi, I’m Adam Haley — a senior full-stack developer with 20+ years of experience building reliable software systems for companies like Disney, Sony, and Apple, now focused on advanced AI automation and orchestration.
I design production-grade workflows backed by real infrastructure.
What I deliver:
• AI-powered automation workflows (n8n, Python/Langchain, Supabase, OpenAI, AWS Bedrock)
• Multi-tenant chatbot + RAG frameworks (secure, scalable knowledge bots)
• Custom Infra setup - Host your own private AI Garden on a VPS (ie: Digital Ocean or AWS)
• Customized Automation dashboards (see detailed stats in realtime)
• System audits, Agent evaluations
• Ongoing support & optimization via flexible retainers
Why Work With Me:
I work to meet my clients where they are, to understand and build for YOUR needs, not pre-defined agendas or templates. My engineering background gives every project production-grade reliability. My Agent builds take into account the tradeoffs between classical deterministic architectures, and the modern flexibility of LLMs. My hybrid approach leverages each for their strengths in a way that is custom tailored to YOUR situation and the domain space at hand.
🤝 Let’s build something smart together.
Laravel
JavaScript
React
Python
n8n
Node.js
Prompt Engineering
LangChain
Chatbot
Supabase
Next.js
Make.com
Web Scraping
Claude
AI Agent Development
Robb C.
Astoria, Oregon
$75/hr
5.0
2 jobs
I’m a senior full-stack engineer with 25+ years of experience building scalable SaaS platforms, AI-powered web applications, and high-performance frontend systems using React, Next.js, TypeScript, and Node.js.
I help startups and enterprise teams design and ship production-grade applications that combine modern frontend architecture with clean backend APIs, AWS cloud infrastructure, and AI/LLM integrations (OpenAI-powered workflows, intelligent automation, structured AI outputs).
My background includes engineering leadership at Bamboo Health, where I architected a unified frontend platform that reduced development cycle time by 30%, and large-scale frontend modernization at Nordstrom and Monotype.
I don’t just build features - I design systems that scale.
🧠 AI + Modern Stack Expertise
I specialize in building AI-ready applications that move beyond demos and actually work in production.
1. AI & LLM Integration
- OpenAI API integration
- LLM-powered SaaS features
- Structured output parsing & prompt engineering
- AI workflow orchestration
- Retrieval-ready architecture (RAG-friendly systems)
- AI chat interfaces & intelligent automation tools
2. Full-Stack Development
- React, Next.js, TypeScript, JavaScript (ES6+), AngularJS
- Node.js, Python backend services & REST APIs, C#, Java, PHP
- Authentication & secure role-based systems
- SaaS product architecture
- Component libraries & design systems
- Performance optimization
3. Cloud & DevOps
- AWS cloud-native systems
- CI/CD pipelines
- Vite, Webpack, modern build tooling
- Test-driven development (Vitest, Jest, RTL)
- Scalable deployment strategies
🏗 What I Build
✔ AI-powered SaaS platforms
✔ Enterprise-grade internal tools
✔ Healthcare & regulated-industry systems
✔ High-performance dashboards
✔ Startup MVPs built to scale
✔ Modernized legacy platforms
💡 How I Work
- Architecture-first thinking
- Clean, maintainable codebases
- Strong API contracts
- Clear technical communication
- Cross-functional collaboration with product & design
- Focus on long-term scalability (not short-term hacks)
If you're building a serious product - especially one integrating AI - I can help you architect it correctly from the start and ship it with confidence.
React
TypeScript
JavaScript
Web Development
SaaS Development
RESTful Architecture
Node.js
Full-Stack Development
OpenAI API
AI App Development
Supabase
Next.js
Git
Amazon Web Services
Python
Nancy J.
Odessa, Florida
$15/hr
5.0
1 jobs
🚀 Full Stack Developer | Spring Boot | React | Next.js | AWS | Microservices
Need a scalable SaaS platform, enterprise application, real-time system, or modern web application that is built correctly from day one?
I help startups and businesses build production-ready software using Spring Boot, React, Next.js, Node.js, FastAPI, PostgreSQL, Docker, AWS, and Microservices.
✅ Full Stack Development
✅ SaaS Platform Development
✅ Enterprise Web Applications
✅ REST APIs & Microservices
✅ Real-Time Applications (WebSocket)
✅ Cloud Architecture & Deployment
✅ AI & LLM Integrations
✅ System Modernization & Performance Optimization
━━━━━━━━━━━━━━━━━━━━━━
🔥 WHAT I CAN BUILD FOR YOU
➡️ SaaS Platforms
Multi-tenant applications, subscription systems, RBAC, billing, analytics dashboards, and admin portals.
➡️ Enterprise Applications
Scalable business systems, workflow automation, internal tools, CRM integrations, and management platforms.
➡️ Real-Time Systems
Chat applications, notifications, live tracking, event-driven architectures, and WebSocket solutions.
➡️ AI-Powered Applications
OpenAI, Gemini, RAG systems, AI assistants, document processing, and workflow automation.
➡️ Microservices Architecture
Spring Boot microservices, Kafka event streaming, API gateways, service communication, and distributed systems.
➡️ Cloud-Native Applications
AWS deployment, Docker containers, CI/CD pipelines, monitoring, logging, and production infrastructure.
━━━━━━━━━━━━━━━━━━━━━━
🤝 EXTENDED DEVELOPMENT TEAM
Beyond development, I collaborate closely with:
✔ QA Engineers
✔ Salesforce Developers
✔ DevOps Engineers
✔ Cloud Architects
✔ Product Managers
✔ UI/UX Designers
✔ Business Analysts
This means you get someone who understands the complete software delivery lifecycle, not just coding tasks.
━━━━━━━━━━━━━━━━━━━━━━
⚡ TECH STACK
Frontend:
React.js • Next.js • TypeScript • JavaScript • Redux • Tailwind CSS
Backend:
Spring Boot • Java • Node.js • Express.js • FastAPI • REST APIs • GraphQL
Databases:
PostgreSQL • MySQL • MongoDB • Redis
Cloud & DevOps:
AWS • Docker • Kubernetes • GitHub Actions • CI/CD
Architecture:
Microservices • Event-Driven Systems • Kafka • WebSocket • Distributed Systems
AI:
OpenAI • Gemini • LangChain • RAG Pipelines • AI Agents
━━━━━━━━━━━━━━━━━━━━━━
✅ WHY CLIENTS WORK WITH ME
• Clean, scalable, production-ready code
• Strong software architecture decisions
• Clear communication and regular updates
• Business-focused problem solving
• Long-term maintainability
• Reliable post-launch support
I don't just build features. I help design systems that are secure, scalable, maintainable, and aligned with your business goals.
📩 Send me a message and let's discuss how we can build your product successfully.
Full Stack Developer | Java Developer | Spring Boot Developer | React Developer | Next.js Developer | MERN Stack Developer | Node.js Developer | Backend Developer | Frontend Developer | Full Stack Engineer | Java Full Stack Developer | Spring Boot Microservices Developer | REST API Developer | GraphQL Developer | PostgreSQL Developer | MySQL Developer | MongoDB Developer | Redis Developer | Kafka Developer | Event-Driven Architecture | WebSocket Developer | SaaS Developer | Enterprise Application Developer | AI Integration Developer | FastAPI Developer | OpenAI Integration | AWS Developer | Docker Developer | Kubernetes Developer | CI/CD Engineer | Cloud Application Developer | Microservices Architect | API Integration Specialist | Web Application Developer | Software Engineer
Microsoft Excel
Microsoft PowerPoint
Microsoft Excel PowerPivot
Zorigto S.
Saratoga Springs, Utah
$41/hr
5.0
15 jobs
I’m a QA Engineer with 6+ years of experience helping teams in SaaS, e-commerce, fintech, and healthcare deliver stable, high-quality releases. I work across both automation and manual testing, building test strategies that fit the product, the team, and the release timeline.
Whether you need a full automation framework from scratch or meticulous manual test coverage for critical user flows, I focus on reducing bottlenecks, preventing defects, and improving release confidence.
What I Deliver:
- Automation: Cypress, Playwright, Selenium, WebDriverIO, Cucumber, Appium
- Manual QA: Functional, Regression, UI/UX, Smoke, UAT, Exploratory
- API Testing: Postman, Rest Assured, Swagger
- CI/CD: GitHub Actions, Jenkins, GitLab, CircleCI
- Databases: SQL, PostgreSQL, MongoDB
How I Work:
- Design test plans that align with business and release priorities
- Create maintainable automation code that’s easy for teams to extend
- Document issues clearly with actionable bug reports
- Balance speed and coverage to optimize release cycles
Why Clients Choose Me:
- Can handle both manual deep-dive testing and scalable automation
- Communicate clearly with technical and non-technical stakeholders
- Adapt quickly to new domains and workflows
- Deliver on time, without surprises
Let’s connect to discuss how I can help you ship with fewer defects, faster releases, and more confidence in your product.
QA Automation
Cypress
JavaScript
TypeScript
SQL
GitHub
Regression Testing
Component Testing
Postman
API Testing
Test Development
Manual Testing
Software Testing
End-to-End Testing
Quality Assurance
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