Justin Arulnathan

CAREER SUMMARY

› 10+ years developing web applications with a firm foundation in modern Python, Django & FastAPI.

› Strong understanding of infrastructure as code, automation and optimisation of cloud infrastructure.

› Passionate about improving developer experience through continuous improvement of tooling and processes.

› Pragmatic and collaborative, favouring value to the business and its customers over shiny new tools.

› Safely integrating agentic AI tooling into the SDLC to enable rapid iteration and reduce cognitive load.

EMPLOYMENT HISTORY

CardioNexus - Senior DevOps Engineer

September 2024 - June 2026

› Developed and maintained ETL pipelines for ingesting medical device transmissions in HL7 format (AWS Lambda, Python, Typescript)

› Developed and maintained web portals used by healthcare professionals to aid the diagnosis of cardiac health issues using patient device transmission data (AWS ECS, FastAPI, React/Typescript, Auth0)

› Championed observability and monitoring of application and infrastructure components across microservice architecture, including the implementation of distributed tracing (OpenTelemetry, AWS Cloudwatch & X-Ray)

› Established and upheld best practices for secure continuous delivery of applications and infrastructure (Terraform, Github Actions, Bash, Powershell)

› Played a key role in aligning the organisation's security posture with ISO 27001 standards by remediating security and compliance issues identified by external audit (Vanta)

Common Code - Senior Full-Stack Developer, DevOps Engineer

2016 - June 2023

› Worked on a variety of projects for clients in the public and private sectors, including government agencies, non-profits, and startups.

› Provided technical leadership on projects, making decisions around application design and architecture.

› Coordinated the delivery of numerous projects using Agile or Scrum methodologies.

› Mentoring and coaching internal developers.

Full Stack Web Developer - New Atlas

2011 - 2016

› Developed internal and external-facing features for a heavily trafficked news site with an emphasis on SEO.

› Contributed to the design, development and migration from a bespoke PHP web application to a modern, standards-based CMS built using the Django framework.

RECENT PROJECTS

Utility Mapping

Oct 2020 – Nov 2021 | Technical lead, Full Stack Developer (React Native), DevOps Engineer

› Green-field, geospatial data project targeting Web, Android and iOS. Server-side infrastructure was built on ECS Fargate (AWS).
› Integration with multiple 3rd party REST and SOAP APIs.
› Implemented a release management strategy to enable staged rollouts of new versions of the mobile app.

Karista

Nov 2021 – Feb 2022 | Technical lead, DevOps Engineer

› Application uplift - Migrated a Django + React app into a form which was deployable as Docker containers.
› Infrastructure uplift - Migrated to cloud-native, stateless architecture, formalised in Terraform and continuously deployed to multiple environments via CI/CD pipeline.
› Replaced clickops-heavy manual deployment process with automated Github Actions workflows.

MedAdvisor

April 2020 – June 2021 | DevOps Engineer

› Provided the platform support required to enable a rewrite of the app which was deployable to stateless, horizontally scalable architecture on AWS.
› Worked within a mature DevOps team following principles such as the AWS Well-Architected Framework.
› Provided visibility across the application stack and infrastructure by instrumenting and configuring Datadog monitoring agents.
› Upgraded application and infrastructure CI/CD pipelines to facilitate Blue-Green deployments. Ensured a smooth transition by coaching development teams on new standards of automation and observability.
› Remediated security and compliance issues identified by an external audit.

EDUCATION

Swinburne University

2001 – 2004 | Bachelor of Information Technology

University of Melbourne

2005 – 2010 | Bachelor of Science - Behavioural Neuroscience

QUALIFICATIONS

Axis Agile

2017 - Certified Scrum Master

TECHNICAL SKILLSET

Languages & Frameworks - Professional Grade

I have authored software in production which utilise the following technologies

Git
Python
Django
FastAPI
Claude Code
Celery
Bash
Powershell
React
React Native
VueJS
NextJS
Typescript
Node
Docker
Docker Compose
Terraform
Cloudformation
Cloud Init
Sceptre
Hashicorp Vault
Nginx
Packer
Chef
Postgres
Redis
MongoDB
Jenkins

SaaS & PaaS Tools

Comfortable with using these to support production grade applications.

AWS
Azure
Github Actions
CircleCI
Bitbucket Pipelines
Sentry
Datadog
New Relic
Papertrail
Loggly
Elastic Cloud
Terraform Cloud
Balena.io
Expo
Cloudflare Tunnels & Access
Auth0
Okta
Octopus Deploy
TeamCity

Languages, Frameworks and SaaS - Hobby Grade

Some non-professional experience with the following: