Technical Lead · AI & Product Engineering
I design & ship scalable products
I'm Marimuthu Mantharasalam — a technical lead and full-stack engineer. I help founders and teams turn ideas into reliable, well-architected products: web platforms, AI-powered features, cloud infrastructure and automation. Available for freelance projects and product consulting.
What I Do
Services
From a single high-converting website to a full product platform — here's how I can help.
Web Development
Fast, responsive, SEO-ready websites and web apps — business sites, portals and e-commerce that are built to convert and easy to maintain.
AI & LLM Engineering
AI-powered features and automations — chat assistants, RAG/knowledge search, document processing and LLM integrations embedded into real products.
Mobile App Development
Cross-platform mobile apps for Android & iOS from a single codebase — connected to secure APIs, payments and third-party services.
Existing Project Support
Maintenance, bug fixes, new features, upgrades, DevOps and security — for apps you already have, even ones I didn't build.
Selected Work
Products I've helped build
A sample of engagements, described by sector and scope. Client names are kept confidential.
Timeshare management & payments platform
Led the team building a platform for managing timeshare ownership end to end — member onboarding with identity verification, secure subscription and payment processing, and a real-time admin dashboard.
Realty broker platform
A custom platform for a real-estate brokerage — property listings, enquiry and lead management, and agent tools, built for fast search and easy day-to-day updates.
Bespoke web applications
Every product is a custom build — no templates. From dashboards and portals to payment and API integrations, engineered around the exact workflow each client needs.
Pricing
Simple, transparent pricing
Fixed-scope website packages with clear "starting from" pricing, and fully custom builds quoted to your needs.
Experience
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2013 – Present
Product & Web Engineering
Technical Lead & Full-Stack Developer
Leading development of high-volume web and mobile products in a fast-paced environment — owning architecture, code quality, delivery, client communication and mentoring engineering teams.