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Open to new work

Sujit Kumar Singh. Former CTO, product builder.

I have built software for more than 19 years: as CTO of a FinTech company, as a top-rated freelancer on Upwork, and as the founder of Kaizen Apps. I am available for consulting, part-time and full-time roles.

Work with me See what I have built
  • #2 on Peerlist · Kaizen OCR
  • #7 on Product Hunt · Kaizen Focus
  • Nine products shipped and maintained
Sujit Kumar Singh
About

Engineering, product and team in one person

Former CTO

Built and scaled the technology platform of a FinTech company from the ground up.

Top-rated freelancer

Top-rated on Upwork, and an expert on Codementor.

Founder

I run Kaizen Apps (StepForward Solutions LLP): nine apps for Windows, Android and Google Drive.

Still hands-on

I work in a senior engineering leadership role and keep writing code on my own products.

Products

Nine products, built and shipped

Designed, coded, sold and supported under Kaizen Apps. Each card opens the product page.

Kaizen OCR & PDFCopy the text out of scans, photos and PDFs, then merge, edit and convert them.Windows Kaizen Speech StudioTurn a script into a natural voice-over, transcribe audio and dub videos.Windows Kaizen FocusBlock distracting websites and apps on a Windows PC and set daily time limits.Windows Kaizen Auto Mouse Auto ClickKeeps your PC awake and your status active by moving the mouse for you.Windows Kaizen Fast ClickerAn auto clicker with one screen of settings and a hotkey that works in-game.Windows Kaizen TypeGuardTypes your text into any window, one key at a time, where paste does not work.Windows Kaizen TimerSet the screen time, hand over the phone. It locks itself when time is up.Android Kaizen LocatorAsk a family member's phone where it is by text message, plus a loud SOS.Android Kaizen DriveGuardSee every person and link that can open your Google Drive, and take access back.Web app
Skills

What I work with

C# and .NETWinForms, WPF, MAUI, ASP.NET Core
AzureFunctions, SQL, Blob Storage, Service Bus, Durable Functions
Desktop appsWindows client software with WinForms and WPF
.NET MAUIAndroid apps from one C# codebase
AI featuresAzure OpenAI, OCR, text to speech
Payments and licensingPaddle checkout, license servers, activation
DatabasesSQL Server, Azure SQL, SQLite
Email deliveryAWS SES, transactional email
DevOpsGit, CI/CD, Azure DevOps
Web and SEOStatic sites, search basics, analytics
Product managementRoadmaps, prioritisation, user research
Team leadershipHiring, mentoring, cross-functional teams
Availability

Three ways to work together

Consulting

Architecture reviews, technology choices, team setup and product strategy.

Part-time

Fractional CTO, technical advisor, or a defined part-time engagement.

Full-time

Engineering leadership and senior individual roles at product companies.

  • Pune
  • Mumbai
  • Remote
  • Hybrid
Contact

Tell me about the role or project

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