I'm Sujit Kumar Singh. Former CTO in FinTech, top-rated freelancer on Upwork, and founder of products featured #2 on Peerlist & #7 on Product Hunt. Available for consulting, full-time, and part-time roles.
From CTO at a FinTech company to building award-winning products — 19+ years of turning ideas into reality.
I've been CTO at a FinTech company where I built and scaled the entire technology platform from the ground up. I'm a Top-Rated Freelancer on Upwork and a recognized expert on Codementor. Currently working in a senior engineering leadership role while continuing to build products on the side.
I run Kaizen Apps (StepForward Solutions LLP) — 9 desktop and Android products serving 3,500+ users worldwide. My products have been featured #2 globally on Peerlist and #7 on Product Hunt. From OCR tools to AI speech synthesis to productivity apps, I build things that solve real problems.
My core strength lies at the intersection of hands-on engineering, product thinking, and team leadership. I don't just write code — I think about the user, the business, and the team.
Built & scaled FinTech platform from zero
Top-rated on Upwork & Codementor
#2 Peerlist • #7 Product Hunt
3,500+ users across 100+ countries
9 products built, shipped, and maintained under Kaizen Apps. Each one crafted to make users' lives easier.
Extract text from images, PDFs, and scanned documents with high accuracy using advanced OCR technology.
Learn MoreConvert text to natural-sounding speech with multiple voices, languages, and customization options.
Learn MoreStay productive and eliminate distractions. Block websites and apps to maintain deep focus during work.
Learn MoreAutomate repetitive mouse clicks and movements. Save time with customizable automation scripts.
Learn MoreHigh-speed auto-clicker with configurable click rates and hotkey support for rapid clicking tasks.
Learn MoreVersatile countdown and stopwatch timer with reminders, alarms, and productivity tracking features.
Learn MoreMonitor and track keyboard activity. Useful for parental controls and productivity analysis.
Learn MoreOpening Range Breakout trading tool integrated with Shoonya API for automated trading strategies.
Learn MoreConvert YouTube videos into podcast-ready audio content with automated processing and editing.
Learn MoreA broad and deep technical toolkit built over 19+ years of shipping software.
WinForms, WPF, MAUI, ASP.NET Core
Functions, SQL, Blob, Service Bus, Durable Functions
Desktop UI, rich client apps
Cross-platform mobile & desktop
Azure OpenAI, OCR, Text-to-Speech
Paddle integration, licensing systems
Transactional email, deliverability
SEO optimization, website development
Roadmaps, prioritization, user research
Hiring, mentoring, cross-functional teams
SQL Server, Azure SQL, SQLite
Git, CI/CD, Azure DevOps
I'm open to new opportunities and collaborations. Here's how we can work together.
Open to full-time engineering leadership and senior IC roles at product-driven companies.
Available for part-time engagements, fractional CTO, or technical advisory roles.
Architecture reviews, tech stack decisions, team setup, and product strategy consulting.
Have a role, project, or idea? I'd love to hear about it. Drop me a message and I'll get back to you promptly.
Feel free to reach out through any of these channels. I typically respond within 24 hours.