👋  Hey there, I'm

Sasikumar

Flutter & Mobile App Developer · Android & iOS

I build fast, cross-platform mobile apps using Flutter & Dart. Currently at Syncfusion shipping BoldSign — an enterprise e-signature product used by thousands of businesses worldwide.

View My Work Let's Talk Resume
2.5+
Years Exp
5+
Apps Shipped
2x
Platforms
Scroll
01 / About
Who I Am

Developer who ships
real products

I'm a Flutter developer with 2.5 years of professional experience building cross-platform mobile applications at Syncfusion — one of India's leading product software companies.

My day job is working on BoldSign, an enterprise e-signature platform on Android & iOS. Working in a real product team has taught me to write code that scales, think beyond features, and care deeply about the end user.

Outside work, I build independently. xPen is my personal finance app built solo in Flutter — ready to launch on Android. I also build web apps with React, meaning I work across both mobile and web.

I'm now channelling that discipline into freelance work — helping people bring their app ideas to life, professionally.

2.5+
Years Experience
5+
Apps Shipped
1k+
BoldSign Users
2x
Android & iOS
Currently Software Engineer @ Syncfusion · BoldSign Team
02 / Experience
Work & Internships

Where I've built things

Real-world product-company experience, internships, and side projects.

Syncfusion
Flutter Developer
Zoho Corporation
Web Developer
Roots India
Automation Eng.
Software Engineer — Flutter Developer
Syncfusion Software Pvt. Ltd.
Sep 2023 — PresentChennai, IndiaFull-Time · Product Company
  • Develop and maintain features for BoldSign — an enterprise e-signature platform on Android & iOS used by thousands of businesses globally.
  • Architect Flutter apps using MVVM pattern with Bloc, Cubit, and Streams for scalable, testable state management.
  • Implement core workflows — document upload, signature placement, signing flows, and real-time audit trails via secure REST APIs.
  • Integrate OAuth2 authentication, flutter_secure_storage, and flutter_cache_manager for enterprise-grade security and performance.
  • Debug and optimise performance on both Android & iOS — resolving rendering bottlenecks and improving launch times.
  • Participate in Agile sprints — daily standups, code reviews, backlog refinement, and retrospectives in a cross-functional team.
  • Write clean, reusable Dart code following SOLID principles and internal code quality standards.
FlutterDartMVVMBloc/CubitREST APIOAuth2AndroidiOSFirebase
Web Developer — Internship
Zoho Corporation
Jun 2022 — Jul 2022Salem, IndiaInternship
  • Built and enhanced front-end UI components using HTML, CSS, and JavaScript for internal web projects.
  • Exposure to professional development workflows and code standards at a global-scale tech company.
  • Developed responsive web interfaces practising clean semantic markup and cross-browser compatibility.
HTML5CSS3JavaScript
Automation Engineer — Internship
M/S Roots India Pvt Ltd
Jun 2021 — Jul 2021Coimbatore, IndiaInternship
  • Hands-on exposure to industrial automation processes and engineering workflows in a manufacturing environment.
  • Developed strong problem-solving fundamentals connecting Mechatronics background to practical engineering.
AutomationMechatronicsProblem Solving
03 / Skills
What I Know

Tools &
Technologies

Built through 2.5 years of product-company work, internships, and building side projects from scratch.

Mobile Development
Flutter & Dart95%
Bloc / Cubit State Management88%
Android SDK80%
iOS / Xcode72%
Web Development
React.js78%
JavaScript75%
HTML5 / CSS382%
04 / Projects
What I've Built

Selected Projects

From enterprise apps used by thousands, to indie products built completely solo.

01 — FEATURED PROJECT
BoldSign
🏢 Production
Enterprise E-Signature Platform · Syncfusion · Android & iOS
An enterprise-grade mobile e-signature app enabling businesses to send, sign, and manage legal documents digitally — used by thousands of companies globally. I work on this full-time as part of the Syncfusion engineering team.
  • MVVM + Bloc/Cubit architecture for scalable, production-grade state management
  • Secure REST API integration with OAuth2 auth and encrypted local storage
  • Document upload, signature field placement, signing workflows, and audit trails
  • Consistent cross-platform UX across Android & iOS
FlutterDartMVVMBlocREST APIAndroidiOS
▶ Play Store🍎 App Store↗ Website
BoldSign - Self-sign and request signatures BoldSign - Signature functionality
02 — FEATURED PROJECT
xPen
🚀 Launch Ready
Personal Finance App · Solo Build · Flutter
My own Flutter app — built solo from concept to Play Store submission. Tracks income and expenses with category breakdowns, monthly summaries, and visual charts. Offline-first.
  • Full product lifecycle solo: design → dev → QA → Play Store prep
  • Offline-first local storage with SQLite / Hive — no internet required
  • Material Design 3 — clean, modern, accessible UI
FlutterDartSQLiteHiveMaterial 3
▶ Coming Soon
xPen - Dashboard overview with income and expense xPen - Add transaction form xPen - Expense breakdown with category chart
03
Thoughts Sharing
🌐 Live
Social Platform · React.js · Netlify
A dynamic social web app where users post, browse, and engage with shared ideas. Full CRUD with React hooks, responsive layout, and instant deployment on Netlify.
  • Full CRUD with React hooks and component-based architecture
  • Responsive across desktop and mobile browsers
React.jsJavaScriptCSS3Netlify
↗ Live Demo
04
To-Do App
🌐 Live
Task Manager · React.js · Netlify
Clean task management app with create, prioritise, and complete. Priority labelling, due date tracking, and colour-coded UI built in React with hooks state management.
  • React hooks — no backend, instant local state
  • Priority system with colour-coded visual feedback
React.jsJavaScriptCSS3
↗ Live Demo
05
Rock Paper Scissors
🌐 Live
Browser Game · Vanilla JavaScript
Fully responsive Rock-Paper-Scissors game demonstrating front-end JS logic, DOM manipulation, score tracking, and cross-device responsive design — no frameworks.
  • Pure JavaScript game logic with animated score tracking
  • Responsive — works perfectly on all screen sizes
HTML5CSS3JavaScript
↗ Live Demo
MORE
Projects Coming Soon
In the Pipeline
More exciting projects in development. Building web apps, tools, and innovative solutions. Stay tuned!
  • Advanced Flutter applications
  • Full-stack web solutions
  • Open-source contributions
🔄 In Development
05 / Contact
Get In Touch

Let's build
something together

Open to freelance mobile and web projects. Drop me a message — I'll get back within 24 hours.

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