Harsh Marthak — Senior Software Engineer

As a Software Engineer with a strong foundation in frontend development and product engineering, I specialize in building scalable, high-performance applications using ExtJS, React, and modern JavaScript/TypeScript ecosystems. My expertise spans feature enhancements, performance optimization, and large-scale application migrations, with a focus on elevating user experience and system reliability. Throughout my career, I've successfully led and contributed to multiple end-to-end projects—including dashboard development, AI-powered query assistants, and custom UI framework enhancements. From migrating ExtJS versions and implementing React-based dashboards to optimizing complex User Management Systems, I thrive on solving tough engineering challenges and delivering high-impact solutions. I’m also passionate about mentoring, knowledge sharing, and collaborative problem-solving. Whether it's conducting technical training, guiding new developers, or leading event teams during my academic years, I bring strong leadership, communication, and analytical skills to every environment I work in. Core Strengths: Frontend Development: ExtJS (6.5.3 to 7.4), React.js, custom productframeworks Feature Enhancements: Dashboards, advanced grid configs, smart filters Performance Optimization: Efficient state management, UI responsiveness, concurrency handling Architecture & Systems: User Management Systems, role-based access, modular design AI & Data Visualization: LLM integration, structured query builders, Vega Lite Mentorship: KT sessions, onboarding new developers, team guidance Leadership: Technical fest planning, event management, team coordination Technical Toolkit: Frontend: ExtJS, React, custom frameworks Backend: JavaScript, TypeScript State Management: Redux, React Context API Testing: Jest, Cypress, WebUI integration testing Build & Deployment: Webpack, Sencha CMD APIs & Data: REST APIs, GraphQL, JSON AI Integration: OpenAI APIs, speech-to-text APIs I’m always eager to explore emerging technologies and contribute to innovative projects that drive better performance, stronger UX, and real business impact. Let’s connect!

Stackforce AI infers this person is a SaaS-focused Fullstack Developer with strong frontend expertise.

Experience: 9 yrs 9 mos

Skills

Extjs
React.js
Ai & Ml Integration
Javascript
Team Leadership
Event Planning
Event Management
Leadership

Career Highlights

Expert in building scalable, high-performance applications.
Led multiple end-to-end projects in dashboard development.
Strong leadership and mentoring skills in technical environments.

Work Experience

Vistaar Technologies

Senior Software Engineer (2 yrs 9 mos)

Software Engineer (1 yr 11 mos)

Trainee Software Engineer (1 yr 1 mo)

LATE SHRI VISHNU WAMAN THAKUR CHARITABLE TRUST VIVA INSTITUTE OF PHARMACY

Event Head - Beat the Bid (11 mos)

Deputy Head - TechChase (11 mos)

TechChase Volunteer (11 mos)

Freelance

Mathematics Tutor (1 yr 3 mos)

Education

Bachelor of Engineering at VIVA institute of technology

Harsh Marthak

Senior Software Engineer

United Arab Emirates9 yrs 9 mos experience

Most Likely To SwitchAI Enabled

Key Highlights

Expert in building scalable, high-performance applications.
Led multiple end-to-end projects in dashboard development.
Strong leadership and mentoring skills in technical environments.

Stackforce AI infers this person is a SaaS-focused Fullstack Developer with strong frontend expertise.

Contact

Skills

Core Skills

ExtjsReact.jsAi & Ml IntegrationJavascriptTeam LeadershipEvent PlanningEvent ManagementLeadership

Other Skills

Dashboard DevelopmentWeb Performance OptimizationUI/UX DesignState ManagementAPI DevelopmentProduct FrameworkRepository ManagementCode OptimizationBuild DeploymentCustom frameworkSoftware DevelopmentUI/UX EnhancementCode RefactoringDebuggingUser Management System

About

Experience

9 yrs 9 mos

Total Experience

3 yrs 3 mos

Average Tenure

5 yrs 9 mos

Current Experience

Vistaar technologies

3 roles

Senior Software Engineer

Promoted

Aug 2023 – Present · 2 yrs 9 mos · Mumbai, Maharashtra, India

Project: Dashboard Feature Enhancements
Developed Preload Callback Support, allowing dashboard events to be triggered before full load.
Implemented Multiple Filter Operator Support, enabling complex filtering logic.
Project: WebUI Support & ExtJS Expertise
Led L3 production support for different solutions and product framework.
Resolved high-priority S2 and S3 issues, ensuring system reliability.
Testing & Quality Assurance
Led sanity testing for all product releases.
Conducted integration testing for newly developed components.
React Development & Feature Enhancements
Developed Dashboard Runtime Defect Fixes and enhancements for the React-based dashboard
editor.
Built the Grid Configurator Module, featuring:
Bulk editing capabilities.
Copy/move column support.
Toolbar customization options.
Project: AI Chat Component Development
Designed and developed app, an AI-driven query assistant with:
Structured query builder integration.
History replay and reprocessing options.
Converted the initial Proof of Concept (POC) into a production-ready package.
ExtJS Repository Management
Created multiple product framework repositories for providing source code to different clients.
Built and tested framework builds, escrow builds, and official releases using Sencha CMD.
Training, Knowledge Sharing & Documentation
Conducted in-depth training sessions on:
User Management System setup and build creation.
Product support and issue resolution processes.
Authored detailed technical documentation for new feature implementations.
Skills:
ExtJS | React.js | JavaScript | Dashboard Development | AI & ML Integration | Web Performance Optimization | UI/UX Design | State Management | API Development | Product Framework | Repository Management | Code Optimization | Build Deployment

ExtJSReact.jsJavaScriptDashboard DevelopmentAI & ML IntegrationWeb Performance Optimization+7

Software Engineer

Sep 2021 – Aug 2023 · 1 yr 11 mos · Mumbai, Maharashtra, India

Project: ExtJS Migration & Feature Enhancements
Upgraded ExtJS from 6.5.3 to 7.4.0, ensuring compatibility while improving performance.
Conducted code modernization and refactoring to leverage new ExtJS capabilities.
Project: User Management System Enhancements
Developed Import functionality for the Users screen, allowing bulk user creation and updates.
Led the development and deployment of latest version of system, enhancing security and
efficiency.
Feature Enhancements & Bug Fixing
Dashboard Interactivity Improvements:
Optimized expand/collapse functions for better navigation.
Enhanced filter bar usability with real-time repositioning logic.
Resolved UI/UX Defects:
Fixed layout inconsistencies in ExtJS 7.4.0 to ensure responsive design.
Optimized rendering for better dashboard performance.
Product Support & Issue Resolution
Provided L2/L3 production support for User Management System and product components.
Resolved high-priority defects, ensuring stable application performance.
Testing & Quality Assurance
Conducted integration testing for product components.
Training & Mentoring
Conducted KT sessions for new team members on:
ExtJS Migration Best Practices
Product Support Workflows
Assisted trainees in setting up development environments and debugging product components.
Skills:
ExtJS | JavaScript | Custom framework | Software Development | UI/UX Enhancement | Code Refactoring | Debugging | API Development

ExtJSJavaScriptCustom frameworkSoftware DevelopmentUI/UX EnhancementCode Refactoring+2

Trainee Software Engineer

Aug 2020 – Sep 2021 · 1 yr 1 mo · Mumbai, Maharashtra, India

Project: User Management System Enhancements
Implemented Dynamic Role Management:
Developed functionality to add and remove roles dynamically within the system.
Ensured security settings automatically refresh after role modifications without requiring a
manual reload.
Developed Bulk User Data Management Features:
Designed and implemented Import/Export functionality for bulk user data operations.
Concurrency & Security Handling:
Implemented logic to prevent multiple triggers of security refresh, ensuring stability and
avoiding redundant API calls.
Project: Product Dashboard Enhancements
Developed UI Interactivity Features:
Added expand/collapse functionality for a dashboard panel to improve user navigation.
Implemented dynamic filter bar repositioning, ensuring a smooth user experience.
Bug Fixing & Performance Improvements:
Resolved runtime filter bar positioning issues affecting dashboard usability.
Optimized UI rendering logic for faster loading times and a better user experience.
Product Support & Issue Resolution
Handled Production Support Issues:
Provided L2/L3 support for solution teams using the User Management System.
Debugged and implemented temporary workarounds for critical production issues.
Testing & Quality Assurance
Conducted sanity testing and integration testing for product components.
Training & Learning
Completed structured product framework training and practical assignments.
Learned how to create product builds, deploy applications, and set up environments.
Skills:
JavaScript | ExtJS | Custom framework | User Management System | Debugging | API Integration | Performance Optimization | Quality Assurance

JavaScriptExtJSCustom frameworkUser Management SystemDebuggingAPI Integration+2

Late shri vishnu waman thakur charitable trust viva institute of pharmacy

3 roles

Event Head - Beat the Bid

Promoted

Jun 2019 – May 2020 · 11 mos · Mumbai, Maharashtra, India

Elevated to Event Head, leading a team of five to successfully execute Beat the Bid, an auction-based event inspired by the Knapsack Algorithm.
Played a key role in brainstorming and conceptualizing the event’s mechanics, creating a strategy-based auction competition.
Oversaw planning, promotion, logistics, and participant engagement, ensuring smooth execution.
Worked closely with faculty and senior organizers to fine-tune event rules and improve participant experience.
Additionally contributed to organizing the broader TechChase festival, taking on responsibilities beyond the assigned event.
Skills:
Team Leadership | Event Planning | Strategic Thinking | Decision-Making | Public Speaking | Negotiation | Technical Event Management | Auction-Based Strategy

Team LeadershipEvent PlanningStrategic ThinkingDecision-MakingPublic SpeakingNegotiation+2

Deputy Head - TechChase

Jun 2018 – May 2019 · 11 mos · Mumbai, Maharashtra, India

Took on a leadership role as Deputy Head for a highly brainstorming-intensive technical event at TechChase.
Worked closely with faculty and peers to design problem statements and event structure, ensuring an engaging experience for participants.
Managed event operations, including registrations, rule explanations, and real-time problem-solving during the competition.
Helped refine the event to ensure a balance of technical challenge, strategic thinking, and logical reasoning for participants.
Skills:
Event Management | Leadership | Strategic Thinking | Problem Solving | Decision-Making | Team Coordination | Critical Thinking

Event ManagementLeadershipStrategic ThinkingProblem SolvingDecision-MakingTeam Coordination+1

TechChase Volunteer

Jun 2017 – May 2018 · 11 mos · Mumbai, Maharashtra, India

Actively participated as a volunteer for TechChase, the Computer Engineering department's technical fest.
Assigned to handle event participation, ensuring seamless registration and coordination for a technical event.
Developed hands-on experience in event logistics, communication, and competition organization.
Skills:
Event Coordination | Communication | Teamwork | Time Management | Logistics | Public Speaking

Event CoordinationCommunicationTeamworkTime ManagementLogisticsPublic Speaking

Freelance

Mathematics Tutor

Feb 2016 – May 2017 · 1 yr 3 mos · Mumbai, Maharashtra, India

Provided private tutoring sessions for 10th-grade mathematics, helping students improve problem-solving skills and conceptual understanding.
Designed personalized lesson plans based on students' strengths and weaknesses.
Developed strong communication and mentoring skills by explaining complex mathematical concepts in an easy-to-understand manner.
Assisted students in exam preparation, boosting their confidence and academic performance.
Skills:
Mathematics Tutoring | Problem Solving | Lesson Planning | Personalized Learning | Communication | Mentoring

Mathematics TutoringProblem SolvingLesson PlanningPersonalized LearningCommunicationMentoring