Headline

Mobile Solutions Architect | Building Remote Patient Monitoring Mobile Apps | React Native | Redux | App Stores | Native Integrations | OnDevice AI

About

I build mobile products that handle what most apps avoid — medical-grade data, offline reliability, and privacy that users can actually trust. As a React Native Tech Lead, I currently lead mobile development for a U.S.-based healthcare provider, building remote patient monitoring solutions that integrate BLE medical devices, real-time health data streaming, and on-device AI — all within FedRAMP Moderate and HIPAA-aligned compliance standards. When sensitive health data is involved, architecture decisions matter. I treat them that way. Before that, I spent seven years as the sole technical co-founder of an EdTech startup — designing, building, and shipping 40 Android applications across 40 cities in Odisha, India. No team. No playbook. Just the problem and the work. That experience taught me what it means to own a product completely, from first commit to real users. Outside of client work, I build independently. I have shipped four health apps to the App Store and Google Play — a women's health tracker, a medication adherence app, a mood journal, and a hydration tracker. Every one of them is offline-first, biometric-protected, and built without mandatory accounts because I believe health data belongs to the person it belongs to. If you are working on something that sits at the intersection of health, hardware, and software, I would like to hear about it. 📍 Bengaluru, India · Remote only 🔗 subraatakumar.com

Location

Solan

AI stack

claude

codex

github copilot

Work experience

Tech Lead — React Native | Building Remote Patient Monitoring app | BLE & HIPAA Compliance at Krish Services Group, Oct 2024 - Present · 1 yr 11 mos, Bengaluru, Karnataka, India, Leading mobile development for a prestigious U.S.-based healthcare provider, delivering solutions for remote patient monitoring, diagnostics, and care coordination. - Integrated BLE medical devices (blood pressure monitors, bladder condition sensors) enabling real-time health data streaming directly into the React Native app - Architected FedRAMP Moderate and HIPAA-aligned encryption with hardware-backed secure credential isolation — all sensitive health data encrypted at rest and inaccessible to unauthorised processes - Implemented on-device AI using a local SDK to interpret medical device readings via smartphone camera, enabling offline diagnostic accuracy without cloud dependency - Executed full React Native migration from v0.59 to v0.76.6 including New Architecture adoption (Fabric + TurboModules), resolving all compatibility issues across a legacy codebase - Delivered JWT-authenticated WebSocket chat module for secure real-time clinical communication between patients and care teams - Integrated admin middleware for appointment management, lab coordination, and doctor workflow - Set up Sentry and performance monitoring for runtime stability tracking - Mentored junior engineers through internal sessions on clean code, Git hygiene, and scalable mobile architecture

Sr Software Engineer (Mobile) at Riktam Technologies, Mar 2023 - Aug 2024 · 1 yr 6 mos, Hyderabad, Telangana, India, Contributed to a high-traffic e-commerce React Native app with 1M+ users on Google Play Store for a Philippines-based client. - Improved warehouse order picking accuracy via barcode scanning integration — reduced errors by 15%, increased fulfilment speed by 30% - Built a React Native app from scratch integrating S60 PDA handheld device printer and scanner via custom native modules - Migrated 2 Android-native apps to React Native; upgraded Expo 48 codebase to Expo 51 resolving all dependency conflicts

Sr. Software Engineer (React Native Developer) at NeoSOFT, Jun 2022 - Mar 2023 · 10 mos, Banglore, Developed and maintained enterprise mobile applications for a major Indian insurance brand, improving workforce productivity and customer engagement across field operations. - Built an Employee Management App for attendance tracking, leave management, and internal communication — improving HR operational efficiency across the organisation - Contributed to an Insurance Policy Management App enabling field agents to manage policies, customer data, and premium collections on the go - Integrated EzeTap POS devices via Razorpay native bridge for secure in-app payment and premium collection in the field - Implemented real-time location tracking and face authentication using Firebase and native APIs for secure field agent verification - Delivered Android and iOS enterprise builds via in-house distribution with seamless OTA updates - Collaborated with backend and QA teams to ensure compliance, performance, and data security within regulated insurance workflows

React Native Developer at SkinTheory, Jun 2021 - May 2022 · 1 yr, Berlin, Germany, Developed Skin Theory — a scientific acne and skincare tracking app for a Germany-based healthcare startup focused on personalised dermatological insights. Worked fully remote with a cross-functional European team. - Implemented reactive state management with MobX ensuring seamless data flow and optimised UI responsiveness across the iOS app - Built data-driven skin analysis and tracking screens with performance-optimised rendering and visually rich UI components - Integrated location services and Single Sign-On (SSO) for secure, contextual user experiences - Collaborated closely with product designers and backend engineers through the full product lifecycle including release preparation and quality assurance - Contributed to a privacy-sensitive health app handling personal dermatological data for users across Europe

Founding Tech Lead at Tankadhar Training and Research Center, Jan 2014 - May 2021 · 7 yrs 5 mos, Bhubaneswar, Odisha, India, Co-founded Tankadhar Training and Research Center — an EdTech startup delivering remote computer education across rural and semi-urban Odisha, India. Served as sole technical founder for 7 years, owning all product, development, and deployment decisions end to end. - Designed, built, and shipped 40 Android applications to the Google Play Store — one branded app per partner city — reaching thousands of learners in underserved communities across Odisha - Built and managed a distributed partner network of 40 educators across 40 cities, each operating their own independently branded mobile application - Developed the full technology stack independently: Android mobile apps, content delivery pipeline, and partner onboarding tools - Simultaneously delivered web and software projects for local businesses and a regional software company, managing multiple client relationships in parallel - Integrated a face recognition authentication system using open-source face-api models for a client project

Education

Master of Technology - MTech, Computer Science, MANGALAYATAN UNIVERSITY (Official)

Master's degree, Information Technology, Punjab technical university

Public links

github: https://github.com/subraatakumar