> software_engineer --focus="infra,devops,ai"

Ej Sadiarin

Software engineer building resilient infrastructure, developer platforms, and AI-enabled backend systems.

About

I am a software engineer from DLSU who enjoys designing reliable systems where infrastructure, backend development, and automation work together. My current work blends platform engineering with practical product delivery for teams that need speed without sacrificing resilience.

I have led and shipped projects through LSCS and Thincode, and I am currently interning at Emerson while building production-style systems in my homelab. I am especially interested in DevOps, SRE, and AI-enabled workflows for developer productivity.

Outside engineering, I train Taekwondo and CrossFit, enjoy coffee and tea, and spend a lot of weekends self-hosting and experimenting with new infra tools.

Featured Projects

Core Kubernetes Homelab

2025

Platform Architect and Backend Engineer

Personal K3s platform for GitOps, observability, and self-hosted application delivery.

  • 20+ self-hosted applications
  • 50+ daily automated workflows
  • 50% lower MTTR via observability
  • Kubernetes (K3s)
  • ArgoCD
  • Helm
  • Ansible
  • Terraform
  • Traefik
  • Prometheus
  • Grafana

Flare Disaster Response App

2025

Backend Systems and Protocol Designer

Resilient emergency backend and SMS protocol for communication in zero-connectivity scenarios.

  • Bluehacks 2025 - 2nd Place
  • Offline-first SMS protocol
  • Fault-tolerant message persistence
  • Node.js
  • Express.js
  • SMS gateways
  • REST APIs
  • PostgreSQL

LSCS Core Identity Platform

2024-2025

Software Engineer, Infrastructure and Tools

Centralized authentication platform that unified identity for LSCS internal services.

  • 10+ services unified
  • 95% faster release cycles
  • JWT and OAuth2 based SSO
  • Go
  • Next.js
  • PostgreSQL
  • JWT
  • OAuth2
  • GitHub Actions

LEAP 2025 Registration System

2025

Lead DevOps/SRE and Backend Engineer

High-traffic event registration platform engineered for reliability under extreme concurrency.

  • 30,000+ concurrent users
  • 99.9% uptime
  • 70% lower registration latency
  • Kubernetes
  • Terraform
  • Node.js
  • Express.js
  • Redis
  • GitHub Actions

Experience

  1. Aug 2025 - Current

    Lead Software Engineer @ La Salle Computer Society

    Led platform engineering and backend delivery for internal systems and large-scale events.

  2. Dec 2025 - Current

    Technical Founder @ Thincode

    Built automation workflows and client systems with a focus on cloud reliability and developer experience.

  3. Oct 2024 - Current

    Associate Vice President @ La Salle Computer Society

    Directed engineering initiatives, mentorship tracks, and service-level reliability practices.

  4. Mar 2026 - Current

    SDE Intern @ Emerson

    Supported backend and platform initiatives focused on observability, reliability, and scalable services.

Skills

Languages

  • Python
  • Bash
  • TypeScript
  • Go
  • Java
  • SQL

Infrastructure and DevOps

  • Kubernetes
  • Docker
  • Terraform
  • Ansible
  • ArgoCD
  • GitHub Actions

Databases

  • PostgreSQL
  • Redis
  • MongoDB

Monitoring

  • Prometheus
  • Grafana
  • Jaeger
  • Loki

AI and ML

  • NLP
  • Agentic Workflows
  • OpenAI APIs
  • Google AI APIs

Homelab

k3s-cluster.internal

Homelab K3s cluster topology

GitOps-managed services behind Traefik with metrics and tracing via Prometheus, Grafana, and Jaeger.

GitOps Control Plane

ArgoCD manages deployment state and rollback safety across internal services.

Observability Stack

Prometheus, Grafana, Jaeger, and Loki provide metrics, traces, and logs.

Identity and Access

Self-hosted identity services secure access for dashboards, APIs, and automation.

Automation Services

Scheduled jobs and event-based workers run backend operations and integrations.

Blog Preview

Feb 3, 2026

DevOps Lessons From 30,000 Concurrent Users

What high-traffic registration taught me about release safety, caching, and observability.

  • devops
  • sre
  • kubernetes
  • incident-response

Jan 15, 2026

Operating a K3s Homelab With GitOps

How I run a production-style homelab using ArgoCD, IaC, and layered observability.

  • homelab
  • gitops
  • k3s
  • argocd

Dec 5, 2025

Building Resilient Backends for Unreliable Networks

Patterns from disaster-response systems for durability, retries, and graceful degradation.

  • backend
  • reliability
  • distributed-systems
  • resilience

Contact

Prefer email directly? ejsadiarin@gmail.com