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Hi, I’m a senior frontend and full-stack engineer with 8+ years of experience delivering scalable web apps across logistics, e-commerce, education, and healthcare. I enjoy turning complex requirements into clean, maintainable code and intuitive user interfaces, and I use AI-assisted tools to speed up development while improving quality. I’ve led cross-functional teams, owned major frontend architectures, and collaborated closely with product, design, and backend engineers to ship robust features on time and at scale.…Hi, I’m a senior frontend and full-stack engineer with 8+ years of experience delivering scalable web apps across logistics, e-commerce, education, and healthcare. I enjoy turning complex requirements into clean, maintainable code and intuitive user interfaces, and I use AI-assisted tools to speed up development while improving quality. I’ve led cross-functional teams, owned major frontend architectures, and collaborated closely with product, design, and backend engineers to ship robust features on time and at scale.

Sanjay John

Front-End Developer, Web Developer, Full Stack Developer, +4

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Hi, I’m a senior frontend and full-stack engineer with 8+ years of experience delivering scalable web apps across logistics, e-commerce, education, and healthcare. I enjoy turning complex requirements into clean, maintainable code and intuitive user interfaces, and I use AI-assisted tools to speed up development while improving quality. I’ve led cross-functional teams, owned major frontend architectures, and collaborated closely with product, design, and backend engineers to ship robust features on time and at scale.…Hi, I’m a senior frontend and full-stack engineer with 8+ years of experience delivering scalable web apps across logistics, e-commerce, education, and healthcare. I enjoy turning complex requirements into clean, maintainable code and intuitive user interfaces, and I use AI-assisted tools to speed up development while improving quality. I’ve led cross-functional teams, owned major frontend architectures, and collaborated closely with product, design, and backend engineers to ship robust features on time and at scale.

Available to hire

Hi, I’m a senior frontend and full-stack engineer with 8+ years of experience delivering scalable web apps across logistics, e-commerce, education, and healthcare. I enjoy turning complex requirements into clean, maintainable code and intuitive user interfaces, and I use AI-assisted tools to speed up development while improving quality.

I’ve led cross-functional teams, owned major frontend architectures, and collaborated closely with product, design, and backend engineers to ship robust features on time and at scale.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

German

Beginner

Work Experience

Lead Front-End Engineer at Jumingo GmbH

February 1, 2023 - Present

Lead Front-End Engineer responsible for guiding front-end architecture, code quality, and delivery of scalable web applications; involved in migration and modernization efforts and cross-functional collaboration.

Front-End Engineer at Clark GmbH

July 1, 2022 - January 1, 2023

Contributed to front-end development for web applications, including feature implementation, UI improvements, and collaboration with backend teams.

Senior Software Engineer at BestDoc Technology Pvt. Ltd

October 1, 2017 - November 1, 2018

Senior software engineer leading front-end initiatives, architecture decisions, and collaboration with backend teams; contributed to flagship product features.

Co-founder and Full-Stack Developer at Mindcurv Group GmbH

October 1, 2020 - July 1, 2022

Co-founded and built full-stack products; led across-functional teams; developed multiple web and mobile applications; involved in system design, client communication, testing, SEO, and server management.

Lead Front-End Engineer at Jumingo GmbH

July 1, 2022 - January 1, 2023

Led a Front-End team of 4–6 developers to design and deliver scalable front-end architecture for a multi-tenant e-commerce platform. Defined KPIs, roadmap, and ensured high performance at scale. Migrated codebase from Vue 2 to Vue 3, introduced end-to-end testing with Cypress/Jest, and implemented an A/B testing framework. Collaborated cross-functionally with backend, design, and product to deliver feature-rich modules across multiple e-commerce apps, while focusing on maintainability and robust code quality.

Lead Front-End Engineer at BestDoc Technology Pvt. Ltd

October 1, 2018 - December 1, 2020

Led a Front-End team within a cross-functional agile environment; defined team KPIs, drove roadmaps and execution, and optimized performance at scale. Migrated front-end stack from older Vue/JS to modern Vue 3 with Nuxt; implemented end-to-end testing framework and collaborated with UI/UX to deliver responsive interfaces for SaaS and e-commerce products.

Senior Front-End Engineer at Mindcurv Group GmbH

October 1, 2017 - November 1, 2018

Architected and developed the company’s flagship product; led a cross-functional team of frontend and backend developers; built backend features using Express.js and oversaw design/architecture across multiple products. Implemented scalable web architectures and migration from legacy JS to modern SPA stack, delivering complex modules for multiple e-commerce applications.