About

Roger Rajaratnam

Software engineer & technical lead based in London

  • 20+ Years experience
  • Fintech Current domain
  • Full‑stack Discipline
  • London Based in

Background

I'm a software engineer and technical lead based in London, passionate about building things on the web and solving problems through technology. My journey started with a curiosity about how digital products work behind the scenes — that curiosity eventually turned into a career focused on designing and building scalable applications.

What I do

I've worked across a range of projects in fintech and consumer technology as a full-stack engineer. I enjoy working across the entire stack — from crafting intuitive front-end experiences to designing backend systems that are reliable, scalable, and maintainable. Much of my work today sits at the intersection of engineering, architecture, and leadership.

Teaching & mentoring

One of the most rewarding aspects of my career has been helping other developers grow. I've spent time mentoring engineers and teaching at coding bootcamps, supporting people as they transition into software engineering. Watching someone go from writing their first lines of code to confidently building full applications is incredibly fulfilling.

This blog is where I share ideas, lessons learned, and practical insights from my experience in software engineering — system design, web development, technical leadership, and whatever else is on my mind.

Tech stack

Frontend

  • CSS / Sass
  • HTML
  • JavaScript
  • TypeScript

Frameworks

  • Astro
  • React

Backend

  • GraphQL
  • Node.js
  • PostgreSQL
  • REST APIs

Tooling & Infrastructure

  • AWS
  • Azure
  • Docker
  • Git
  • Netlify

Career

  • 2024 — Present

    Technical Lead

    NewDay · Full-time · London

  • 2024

    Senior Software Engineer

    NewDay · Full-time · London

  • 2023 — 2024

    Full-Stack Bootcamp Instructor

    The Jump Digital School · Contract · Remote

  • 2023

    Senior Software Engineer

    IWSR Drinks Market Analysis · Contract · Remote

  • 2023

    Senior Software Engineer

    ammonite · Contract · Remote

  • 2021 — 2023

    Senior Software Engineer

    NewDay · Contract · Remote

  • 2021

    Senior Software Engineer

    Sylvera · Contract · Remote

  • 2021

    Senior Software Engineer

    Caution Your Blast · Contract · Remote

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