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Sijo Sam

Technical Lead & Full-Stack Engineer

Kerala, India

Professional Summary

Technical Lead and Full-Stack Engineer with 8+ years building and modernising enterprise web platforms using Node.js, React, React Native, TypeScript, GraphQL, and cloud infrastructure. I've re-architected large legacy codebases, shipped performance improvements of 30%+ across production systems, and owned complex API and backend integrations end to end. I also lead teams when the work calls for it, but the code is where I live.

Technologies & Skills

LanguagesTypeScript, JavaScript, Go, Python, Lua, GraphQLFrontendReact 19, React Native, Next.js, Remix, Svelte, SolidJS, Tailwind CSS, Redux Toolkit, RTK Query, Vite, WebpackBackendNode.js, REST APIs, GraphQL, FastAPI, event-driven architecture, message queues, payment integrationsData / InfraPostgreSQL, MongoDB, AWS (EC2, CloudFront, ALB, ACM), GCP, Docker, Kubernetes, Terraform, NginxObservabilityGrafana, Ollama, structured logging, production monitoringTestingJest, Vitest, Cypress, React Testing Library, StorybookPracticesSystem design, CSR/SSR/ISR, microservices, CI/CD, TDD, SOLID, Agile (CSM)PerformanceLCP, INP, FCP, Core Web Vitals, Lighthouse, technical SEO

Work Experience

Technical Lead·Gadgeon
May 2025 – Present

SaaS Products · Kochi, Kerala

  • Led migration of a 100k+ line Angular 13 codebase to React 19, covering architecture decisions, component decomposition, and state management patterns using Zustand
  • Drove HLD and LLD for new platform capabilities across the SaaS enterprise product, covering API integrations, deployment workflows, and shared frontend infrastructure
  • Built a reusable analytics and reporting dashboard component library adopted across multiple product verticals, reducing per-feature UI build time significantly
  • Introduced and standardised AI-assisted development using Claude Code and Windsurf — ran hands-on workshops, set usage guidelines, and improved delivery throughput by 10%
  • Conducted structured code reviews and knowledge-sharing sessions; directly mentored three developers into independent ownership of complex feature areas
  • Leading a team migrating features from an acquired platform (Pimcore, PHP, Vue) into the core product, working across a mixed stack including Blazor and .NET to integrate and re-platform existing functionality

Stack: React 19, Node.js, Python, Zustand, MUI, Docker, GCP, AWS, Terraform, Pimcore, PHP, Vue, Blazor, .NET, Spring Boot

Technical Lead·Diagnal Technologies
2022 – 2025

Digital Media & Streaming · London, UK (remote)

  • Modernised frontend architecture across large-scale video streaming platforms, migrating legacy React patterns to functional components and redesigning rendering pipelines that cut load times by 30% and reduced LCP significantly
  • Owned technical SEO end to end: migrated to an SSR rendering platform, restructured meta and content layers, and grew organic search rankings by 50%
  • Designed and led API integration work connecting streaming clients to backend content delivery and licensing services via GraphQL and REST
  • Fast-tracked to Technical Lead after 18 months; led distributed international teams across time zones, ran structured 1:1s, and reduced code error rates by 35%
  • Shipped across web, mobile, and connected TV surfaces using React, React Native, Next.js, GraphQL, Redux Toolkit, and Astro

Stack: React, React Native, Next.js, GraphQL, Node.js, Tailwind, Redux Toolkit, AWS, Netlify, Astro

Software Developer·HyperBlox
2020 – 2022

IDE Products · Bangalore, India

  • Architected the browser-based IDE for HyperBlox's IoT and 5G platform, including compiler workflow integration, Lua runtime bridging, and distributed execution support, cutting application development time by 30%
  • Collaborated directly with the CTO on compiler design and runtime integration for enterprise-scale deployments; built the abstractions that let product teams ship features without touching low-level platform code
  • Designed reusable frontend and backend abstractions that reduced duplicated engineering effort; served as Scrum Master and Project Owner for core platform delivery

Stack: React, Node.js, MUI, Redux, Docker, Lua, ShellScript, Kubernetes, MongoDB

Software Developer·7th Pillar Ventures
2018 – 2020

SaaS Products · Kochi, India

  • Built full-stack SaaS products across healthcare, retail, and travel, owning both frontend and backend delivery for business-critical features that improved client operational efficiency by 20%
  • Accelerated product delivery for multiple startup clients, covering web and mobile with React, React Native, Node.js, and Next.js

Stack: React, React Native, Node.js, Next.js, MUI, SCSS, Redux, AWS, GCP, Firebase, MongoDB

Education

Bachelor of Technology in Computer Science

University of Cochin, India

2014 – 2018

Certifications

  • Certified Scrum Master (CSM) — Scrum Alliance
  • Certified Secure Web Application Engineer (CSWAE) — Mile2