Md Sajedul Islam - Software Engineer
Software Engineer
I build reliable mobile and web applications, manage end-to-end product lifecycles, and design clean-architecture solutions using Flutter, Android, and modern web tech to drive fast AI-powered delivery, product execution, and technical scaling.
About
Sajed
Software Engineer focused on building robust mobile (Flutter & Android) and web applications, leading end-to-end product lifecycles, and utilizing AI tools for fast development and optimization.
I build reliable mobile applications, manage end-to-end product lifecycles, and design clean-architecture solutions where performance and UX matter.
I am a software engineer, co-founder, and CTO with 2+ years of experience leading end-to-end product lifecycles, managing client requirements, and delivering high-satisfaction solutions for global clients. As the Co-Founder & CTO of Kerno Studio, I drive product execution and technical architecture across mobile, web, and backend systems. With a strong track record building production apps with 100K+ global users, I combine deep technical expertise in Flutter, Native Android, and Next.js with strategic product management. Alongside engineering, I am a publisher and language specialist who has edited over 75+ published books in Bengali.
Leadership & Recognition
Co-Founder & CTO at Kerno Studio
Co-founded Kerno Studio (and previously Heapiphy), driving the end-to-end lifecycle, analyzing client requirements, and delivering high-satisfaction software products for global clients.
Co-Founder & CTO of Kerno Studio, leading technical vision, requirement analysis, and end-to-end delivery for global clients.
Designed and developed a comprehensive e-commerce & service booking ecosystem using Flutter and Clean Architecture.
Managed the product development lifecycle for mobile apps reaching 100K+ global users at LiiLab.
Built Waqt, an ad-free native Android prayer app with 1,200+ downloads and a 4.5★ rating on Play Store.
Engineered AI products Sheba.AI and OneAI using Google Gemini APIs for OCR prescription scanning and interactive assistants.
Integrated real-time systems, audio noise reduction (RNNoise), and custom Bluetooth IoT solutions in mobile applications.
Published and edited 75+ Bengali books, ensuring linguistic quality and cultural depth.
Professional
Experience
I’ve grown from building public-sector software into shipping backend systems, full-stack platform features, gateways, observability, and AI products where reliability, delivery speed, retrieval quality, and usability all have to work together.
And a new adventure ahead
Co-Founder & CTO Roles
Co-Founder & CTO
Kerno Studio- Leading technical strategy, end-to-end product lifecycles, and global client relations to design and deploy high-performance mobile, web, and backend applications.
- Co-founded Kerno Studio, steering technical vision, product architecture, and leading cross-functional teams to build and ship high-satisfaction production apps.
- Manage global client consulting, gather complex business requirements, and design robust clean-architecture specifications for scalable enterprise solutions.
Co-Founder & CTO
Heapiphy- Managed all technical operations including mobile app development, website development, payment integration, and SEO optimization for multiple production-ready applications with real users.
- Built Waqt (Native Android) prayer app (1200+ downloads, 4.5★ rating) and developed NewsSip App (Flutter) for automated short-form news updates.
- Developed the UKGreenLineTravel Web App with booking & PayPal integration, and handled full Google Play publishing, bug fixes, and SEO optimization.
Professional Experience
Software Engineer
Code Studio- Designed and developed a comprehensive e-commerce & service booking ecosystem using Flutter and Clean Architecture, leading technical implementation of enterprise mobile solutions.
- Developed specialized mobile applications, including a utility calculation tool and a mobile LMS with 1K+ downloads featuring GetX state management and secure payment integrations.
- Built location-based marketplace, real-time chat, and medical education LMS platforms with offline-first storage, optimizing workflows for continuous availability.
Junior Product Manager
LiiLab- Managed the product development lifecycle for multiple mobile applications, contributing to apps with 100K+ global users, leading cross-functional teams, and performing market research.
- Guided feature design and usability innovations for OneIELTS (~50K global users) and AI Intro Video Maker App (10K+ downloads).
- Planned system workflows, feature scopes, and personalization logic for Employee Management and Vocab AI Flashcard apps, collaborating on UI/UX iterations.
AI Trainer
Outlier- Worked on improving AI conversational quality, accuracy, and cultural relevance for Bengali language tasks.
- Applied prompt engineering techniques to improve AI response quality and factual correctness.
- Validated, evaluated, and refined Bengali natural language outputs for correctness, clarity, and safety.
Flutter Developer
Elort- Developed Flutter applications with real-time features and machine-learning-based audio processing while following agile development practices.
- Implemented RNNoise-based noise reduction for real-time audio processing in Flutter.
- Built a QR & barcode scanner app with cloud sync, and participated in agile team workflows using Jira and Clean Architecture.
Android Developer
AlgoStack-BD- Developed Android and Flutter applications including IPTV and booking systems, and managed Google Play publishing workflows.
- Integrated subscriptions and Chromecast support into a Java-based IPTV app, and developed a room booking app with smooth reservation flows.
- Built SpellX vocabulary spelling checker app, and managed Google Play Console publishing, updates, and compliance.
And a new adventure ahead
Featured Work
KICKOFF: The Ultimate Football Hub & Predictions
KICKOFF is a premium, fast sports companion application that allows football fans to make predictions on match outcomes, track complete schedules across global leagues, read breaking news and player insights, and compete on global leaderboards.
Explore All Projects
View the full gallery of my mobile applications, web platforms, and full-stack systems.
See MoreTechnical
Stack
The technologies I reach for most often when building mobile applications, backend systems, full-stack products, gateways, production infrastructure, and AI-powered workflows.
Learning fast.
Mobile Development & Architecture
14 technologies
The frameworks, languages, and offline databases I use to design and deploy native and cross-platform mobile apps.
Web & Backend Development
15 technologies
The frontend frameworks, server-side environments, databases, and APIs I use to design and deploy full-stack web applications.
Developer Tools & Platforms
9 technologies
The version control systems, project managers, tools, and operating systems I use to coordinate and build software.
AI & Accelerated Development Tools
8 technologies
The AI assistants, large language model interfaces, and code generators I use for rapid design, coding, and code optimization.
Linguistic & Editorial Skills
5 technologies
Linguistic services and publication management, spanning proofreading, language formatting, and editorial direction.
Talk to my
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Get in Touch
Open to software engineering, mobile & web development, and product management opportunities, as well as thoughtful collaborations.
Let's Build Something
If you're hiring for mobile development (Flutter/Android), full-stack web engineering, software development, or product management roles, I'd love to talk. I'm also open to thoughtful collaborations and open-source conversations.