Bablu Kumar Jha
Available for projects
Founder, BeeProton AI

Bablu Kumar Jha

Full Stack Data Scientist & Business Systems Developer · Finance background · ML, Automation, Django

  • Mumbai, Maharashtra, India
  • 10 published projects
  • 5 certifications
  • Replies within one working day
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About me

From the books of accounts to working software

I build data and software systems for businesses, and I came to this work from the business side.

Before I wrote production code, I worked in accounts: bookkeeping, ledgers, reconciliations and the profit-and-loss statement at month end. Before that, I taught Tally ERP and computer accounting to students preparing for their first jobs. That background shapes everything I build. When an owner says "sales are up but cash is short", I know which reports to open, where the numbers usually go wrong, and what a model or an automation can realistically fix.

Today I work as a Data Scientist on live business problems: a product recommendation system and website for a food & beverages company, and data cleaning, reporting and automation for a textile business. I also run BeeProton AI, where I design and build websites, client portals, GST-compliant billing, automations and machine-learning solutions for small and growing businesses.

I learned most of this by doing it, on real books of accounts, real sales data and real deadlines. Certificates from IBM and Harvard gave me structure. The work taught me what matters: a solution is finished only when it saves time, reduces errors or helps someone make a better decision where money is at stake, and when we can show that it did.

How I work

  1. Understand the business first. What decision are you trying to make, and what would change if you could make it better? A model that answers the wrong question is worse than no model.
  2. Agree how we will measure success. Before anything is built, we pick the number that should move: hours saved, errors avoided, orders, cash collected. After launch, we check it.
  3. Look at the data before promising anything. Most of the work is cleaning, joining and checking. If the data cannot support the idea, I say so early rather than late.
  4. Build the smallest useful version. Something you can use in weeks, not a research project. If a spreadsheet rule beats a model, you get the rule.
  5. Hand it over properly. Source code, documentation, and someone on your side who knows how it runs. Work you cannot maintain is work you will pay for twice.
Experience

Where I have worked

Click any role to read what the work actually involved.

Founder & Full-Stack Data ScientistCurrent BeeProton AI Mumbai, India · Self-employed

Running a technology services business end to end: scoping, fixed-price proposals, delivery, invoicing, collections and after-launch support.

  • Built the company's own operating system on Django: a client portal for projects, milestones, files, support tickets and payments, and GST-compliant invoicing (CGST/SGST or IGST by state, SAC codes, financial-year numbering with no gaps, round-off, amount in words, PDF invoices emailed to the client). Billing that would otherwise live in spreadsheets and WhatsApp now sits in one auditable place.
  • Protected client data by design: end-to-end encrypted client chat and a credential vault, so passwords never travel over email or WhatsApp; sign-in throttling, strict input validation and upload checks on every form.
  • Delivered client websites, including anvifoundation.org for a special-education NGO in Navi Mumbai, built around one business goal: getting a worried parent to book an assessment.
  • Built marketing assets that cost nothing to run: 81 free, privacy-first browser tools (PDF, image, Excel, data) and a free learning platform with 16 course tracks and 134 lessons, designed to earn search traffic and trust instead of paying for advertising.
Data ScientistCurrent Brijwasi Sweets (India) Pvt. Ltd. Jun 2026 – Present · Worli, Maharashtra, India · Full-time · On-site

Data and digital work for an established food & beverages brand.

  • Building the company website, the brand's main digital storefront for its products.
  • Developing a product recommendation system that suggests relevant sweets and products to each customer, aimed at larger baskets and more repeat purchases.
  • Working with the company's own sales and product data in MySQL; models built and evaluated in PyTorch.
  • Agreeing how success is measured before launch: recommendation click-through, average order value and repeat orders, compared with customers who are not shown recommendations.
Data Scientist Vinod Textiles Nov 2025 · Mumbai, Maharashtra, India · Full-time · Hybrid

Turning a growing business's day-to-day data into something management could rely on.

  • Automated repetitive daily tasks, cutting manual data entry and the errors that come with it.
  • Cleaned and consolidated business records into MySQL, so reports come from one trusted source instead of several versions of the same spreadsheet.
  • Built Power BI and Python dashboards so management can follow daily operations and spot problems early, rather than at month end.
  • Matched the tool to the question: exploratory analysis first, then a simple rule, a statistical model or a PyTorch model only where the data justified it. Each model was trained, tested, deployed and monitored.
Account Officer & Data Scientist Pentagon Group Dec 2024 – Dec 2025 · Mumbai Metropolitan Region · Full-time · On-site

Day-to-day accounting, with data analysis applied to the books.

  • Kept the books: bookkeeping, ledger maintenance and reconciliations, and support for month-end closing.
  • Prepared and analysed profit-and-loss figures and explained movements in income and expenses to management.
  • Applied Python and Excel analysis to accounting records to find patterns, unusual entries and items that needed follow-up.
  • This is where I learned how a business really runs: every number on a dashboard starts as an entry someone made in the books, and a report is only as good as those entries.
Computer & Tally Trainer Raah Foundation Dec 2023 – Dec 2024 · Dadar, Mumbai · Full-time · On-site

Job-readiness training in computers and accounting.

  • Trained students in Tally ERP: vouchers, ledgers, inventory, GST and final accounts (profit & loss and balance sheet), alongside computer basics and Microsoft Office.
  • Taught accounting as a working skill, through practical business transactions rather than theory alone.
  • Learned to explain technical subjects in plain language, the same skill I use with clients today.
Skills

What I build with

Filter by area, or search for something specific.

Business & Finance

BookkeepingLedgers & ReconciliationProfit & Loss AnalysisGST InvoicingTally ERPMIS ReportingExcelBusiness Process Mapping

Data & Databases

PythonSQLMySQLPostgreSQLMongoDBPandasNumPyData Cleaning

Machine Learning

Scikit-learnSales ForecastingChurn PredictionRecommendation SystemsFeature EngineeringModel Evaluation

Deep Learning & NLP

PyTorchTensorFlowTransfer LearningComputer VisionNLTKspaCyTransformers

Dashboards & Reporting

Power BIExcel DashboardsMatplotlibSeabornStreamlitKPI Design

Web & Business Software

DjangoREST APIsClient PortalsInvoicing & Billing SystemsAuthentication & SecurityGit & GitHub

Automation

Excel AutomationPython ScriptingAutomated ReportsPDF & Email GenerationScheduled Jobs
Portfolio

Projects

Business systems, websites, machine learning and data work. Each case study starts with the business problem and ends with how the result is measured. Source code is on GitHub where it is mine to share.

Credentials

Training and qualifications

Data Science Professional Certificate IBM
Machine Learning Harvard University
CS109a: Introduction to Data Science (Online) Harvard University
Data Analytics LinkedIn Learning
Python & Pandas Great Learning
Before you write

Questions people ask me

Are you available, and how quickly can you start?
Yes — I take on a small number of projects at a time so that each one gets proper attention. Most start within a week or two of the scope being agreed.
Do you understand accounting, or only the technical side?
Both. I worked as an account officer (bookkeeping, ledgers, reconciliations and profit & loss) and taught Tally ERP before I moved into data science. So I can talk to your accountant in their language, and the systems I build respect how the books actually work: GST splits, invoice numbering, round-off and audit trails.
Do you work with an existing team, or only alone?
Both. I have joined teams as the data person and worked as the whole technical side of a small business. If you already have developers, I am happy to work to your standards and review process.
Will you sign an NDA?
Yes, on request, before you share anything. Client data stays on your systems wherever possible, and anything you send me is deleted at the end of the engagement unless you ask otherwise.
Who owns the code?
You do, on full payment. Source code, documentation and accounts are handed over at the end — that is written into the proposal, not something to negotiate later.
Can you take over something another developer built?
Usually. I read the code first and tell you what shape it is in before either of us commits — sometimes the honest answer is that rebuilding is cheaper than repairing, and you should hear that before you pay.
What does it cost?
Every project is quoted as a fixed price in writing, split into milestones, after a short conversation about scope. Services and pricing has the starting figures, and care plans cover what happens after launch.
Let's work together

Have a business problem that data or software should solve?

Tell me what you are trying to decide, measure or automate, and what it is costing you today. If I am not the right person for it, I will say so.

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