Vijaykumar D.
Senior Full Stack Developer | AI, SaaS, Automation, Web & Mobile App
We’re a senior full-stack development team with 18+ years of software development experience, building and maintaining web platforms, SaaS products, AI-powered applications, eCommerce solutions, automation systems, APIs, dashboards, and cross-platform mobile applications. Our core expertise includes React, Next.js, Node.js, Python, PHP/Laravel, React Native, Flutter, REST APIs, PostgreSQL, MySQL, MongoDB, Firebase, Supabase, AWS, OpenAI, and third-party integrations. We work across the complete product lifecycle — from understanding requirements and designing the technical approach to development, API integrations, testing, deployment, and ongoing improvements. Our experience includes SaaS platforms, AI/LLM applications, RAG and knowledge-based systems, business dashboards, admin panels, booking and scheduling platforms, CRM/ERP integrations, payment systems, automation workflows, and mobile applications. We also have strong hands-on experience with Shopify, WordPress, WooCommerce, and Elementor, including customizations, theme development, eCommerce functionality, integrations, redesigns, performance improvements, and responsive UX. These platforms are part of our broader development experience rather than our entire focus. For mobile development, we work with React Native and Flutter to build cross-platform applications, including production applications available through the App Store. Quality and maintainability are important to us. We use staging/duplicate environments when working on existing systems, follow structured development practices, document important changes, and communicate proactively throughout the project. We can also support projects that require QA and testing, including functional testing, UI/UX validation, responsive testing, browser compatibility, edge cases, regression testing, and detailed defect reporting. If you need a developer who can understand the bigger picture, work across multiple technologies, and take ownership from development through delivery, we’d be happy to discuss your project.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $3.1k
Billed in all: $11,937$12k
$446 in the last 6 months
Across 29 contracts
Earnings, last 30 days
Skill rankings: Top 7% in Java Persistence API
Ranked by MRR among everyone on Upwork with the skill.
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