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gottostartsomewhere/README.md

John Kevin

Backend cum Full-Stack Engineer
Building Software Solutions, Open to Product Ideas and Remote Tech Roles.

About

Final-year CS at VIT Chennai, currently a part of a Founding Team in an Early Stage Fintech Startup, building the data and payment layers behind WiseFolio, an equities management and investor platform.

Striving to learn new technologies and workflows, happy to contribute, can be adaptive to various domains. Currently into open source.

Tech Stack

Languages
Python TypeScript JavaScript C++

Backend
FastAPI Node.js SQLAlchemy Redis

Frontend
React Next.js Tailwind CSS

Data & Infra
PostgreSQL MongoDB Docker GitHub Actions

Cool stuff I've worked on

ledger-api — double-entry payment ledger · FastAPI Postgres Redis

Balanced debit/credit rows inside one row-locked transaction so balances can't drift. Idempotent writes (Redis + Postgres fingerprint) make retries safe from double-charges, and settlement events ship through a transactional outbox with HMAC-signed webhooks — at-least-once delivery that survives a DB rollback.

CVA-SACS — equity stress-testing engine · repo · Python XGBoost FinBERT

Stacks gradient-boosted models with CVaR / Monte Carlo / conformal intervals over ~130 features plus a FinBERT sentiment index into a single 0–100 risk score. Walk-forward backtested, with SHAP for explainability — it's built to be honest about uncertainty, not just print a number.

Pinned Loading

  1. crypto-hub crypto-hub Public

    A dynamic CryptoCurrency dashboard using React and TailwindCSS , (via CoinGecko API) with Firebase Authentication and Database for user details.

    JavaScript

  2. Cva_Sacs Cva_Sacs Public

    Equity stress-testing terminal: calibrated tri-model ensemble, FinBERT sentiment, walk-forward backtesting, Monte Carlo, and SHAP explanations. Live on Streamlit.

    Python

  3. ledger-api ledger-api Public

    Double-entry payment ledger with ACID-safe balances under concurrency, idempotent writes, multi-currency FX, and an HMAC-signed webhook outbox. FastAPI · Postgres · Redis.

    Python