Fullstack Engineer · Visa

Bergin.

Nine years shipping production systems for banking, healthcare, and payments. Currently building payments-security infrastructure at Visa — part of the team that shipped VTIP in July 2026.

SIGNAL ACTIVE
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Tamil Nadu, IST
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Python / Java / Angular
/ 01 — about

Fullstack engineer, currently at Visa.

I write Python, Java, and Angular in production every day. My work today is on payments-security infrastructure — the kind of systems that sit between real money and the people trying to take it.

Before Visa, I spent four years at Cognizant on SRE and fullstack for banking clients, with a focus on RAG systems, ML pipelines, and keeping critical services quiet at three nines. Before that, microservices and cloud architecture at Zoondia, healthcare platforms at Lantern, and the LAMP-stack work that got me started in 2016.

The full trajectory is below, in the format it deserves.

/ 02 — notable

Most recent ship.

Featured · 2026

Visa Threat Intelligence Platform — VTIP

Announced 2 July 2026, VTIP unifies threat, vulnerability, brand, digital-identity, and financial intelligence into a single payments-security platform for banks and issuers.

Built on the same cybersecurity capabilities Visa uses to protect its own global network, VTIP helps financial institutions detect cyber incidents earlier — before they escalate into fraud losses.

// I was part of the team that shipped it.

Read the Visa announcement
/ 03 — career

The ledger.

Company Focus Span
Visa
Fullstack Engineer
Payments security & threat intelligence Python · Java · Angular. Shipped VTIP, 2026.
2025 → present
Cognizant
SRE + Fullstack Engineer
Banking systems, RAG, ML SRE for critical banking infra. Built RAG systems and ML pipelines with PyCaret.
2021 → 2025
Zoondia Software
Software Engineer
Microservices architecture on AWS Django, Spring Boot, Angular. Departure-dignified award.
2018 → 2021
Lantern Technologies
Web Developer
Healthcare platforms Laravel, CodeIgniter. Transition into Python.
2017 → 2018
Subash Technosys
Junior Developer
First professional role Core PHP, WordPress, MySQL. Where it started.
2016 → 2017
/ 04 — stack

Tools I reach for.

Languages

  • Python
  • Java
  • TypeScript
  • PHP

Frontend

  • Angular
  • HTML5 & SCSS
  • RxJS

Backend

  • FastAPI
  • Django
  • Spring Boot
  • Laravel

AI & ML

  • RAG systems
  • LLM integration
  • PyCaret
  • Pandas

Cloud & Ops

  • AWS
  • Terraform
  • Docker
  • CI/CD, SRE

Data

  • PostgreSQL
  • MySQL
  • MongoDB
  • Redis
/ 05 — contact

Start a conversation.

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