About

Roger Rajaratnam

Helping people move into tech, engineers grow, and teams improve how they build software

What I focus on

Practical engineering improvement for people, teams, and products

The work I keep coming back to is the work that makes engineering clearer: better habits, better delivery, and more confidence for the people doing the work.

  • Career switchers who need clarity
  • Engineers growing into more ownership
  • Teams raising the bar without process theatre
  • Years in software 20+
  • Current domain Fintech
  • Teaching experience Bootcamps
  • Career focus Mentoring

How I work

I am a software engineer based in London with more than 20 years of experience across product engineering, delivery, mentoring, and team leadership. The thread that runs through all of it is practical improvement: helping people and teams get better at building software without adding unnecessary ceremony.

For people transitioning into tech

I teach the parts that often stay fuzzy when you are new: how the web stack fits together, how to think about trade-offs, how to go from tutorials to real projects, and how to build enough context to make better decisions. My bootcamp teaching experience made me care deeply about turning complex engineering work into something clear and usable.

For engineers growing in confidence

A lot of career progression comes down to better habits rather than flashy knowledge: debugging clearly, writing maintainable code, communicating trade-offs, and learning how to own outcomes. I enjoy helping engineers make that shift from delivering tasks to growing into trusted contributors.

For teams improving engineering practice

Most teams do not need more process. They need clearer expectations, healthier delivery habits, better testing, more thoughtful mentoring, and pragmatic technical direction. I work best where teams want to raise the bar without slowing everything down.

I write for people getting into tech, engineers figuring out their next level, and teams that want practical engineering practice rather than process theatre.

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

Experience across mentoring, delivery, and team leadership

My background spans hands-on software engineering, teaching career changers, mentoring growing engineers, and helping product teams deliver with more confidence.

  • Apr 2026 — Present

    Staff Engineer

    NewDay · Full-time · London

  • 2024 — Apr 2026

    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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