~/developer/julius

Julius Narvasa

Software Engineer

I build software end to end: APIs, web and mobile apps, the cloud infrastructure underneath, and lately the data platforms on top. 7 years in, I'm also the one teams pull back in when an old system goes down.

Off the clock I run LLMs on my own GPU and fix small daily annoyances with code.

See my work → Résumé Contact

since 2019: 7 yrs
projects delivered: 16
acquisition: 1
Philippines: UTC+8

// new 3D printer. the cats are supervising.

01 — Experience

Where I've shipped

7 years of production backends for real clients, from first commit to acquisition.

Netzon Tech

Full-time

2019 — present

2026
Contact-centre data platform · Data Platform Engineer

An internal, end-to-end data platform on Microsoft Fabric that turns Genesys and Zendesk data into governed KPI reporting.
- › Built a wire-level mock of both vendor APIs (22 endpoints, seeded synthetic data, contract tests) and deployed it to an Azure VM with CI
- › Built the bronze → silver → gold pipelines, then remodeled gold as a star schema so stakeholders could build their own Power BI reports
- › Declared the repository’s GitHub governance in Terraform, with plan comments on every PR, daily drift checks, and apply-on-merge
27 PRs merged in one quarter
2024–26
Retail rewards mobile app · Mobile & Full-stack Engineer

A Cordova shopping-rewards app on iOS and Android.
- › Researched a replacement for Firebase Dynamic Links, then completed the migration to AppsFlyer deep links
- › Reworked login with phone-number sign-in and password reset
- › Kept the app shippable on new platforms: Android’s 16 KB page-size requirement, the iOS 26 release cycle, and urgent Android plugin fixes
- › Wrote a one-shot script that rebuilds the iOS and Android projects from scratch
- › Delivered a partner-page rework and design-matched UI/UX updates through QA
2022–25
Ment · Full-stack & DevOps Lead

A platform for parents raising children with ADHD and other developmental needs.
- › Delivered the v3 rework across DevOps, backend, and the admin frontend
- › Led a team migrating v4 authentication from BankID to a new identity provider, and deployed v4 web builds across environments
- › Gave architectural guidance on the AI chatbot subsystem
- › Owned defect triage and stabilization, and worked through a problematic charting library during the redesign
- › Worked on the card-picker recommendation algorithm
2024–25
Budget request & tracking system · Software Engineer

Budget request and tracking tooling for a Fortune 500 technology company.
- › Development support and production-readiness checks, then daily production error monitoring
2024
Azure edge infrastructure · Infrastructure

Azure Front Door setup for a client’s web platform.
- › Recreated existing environments as Bicep infrastructure-as-code, learning Bicep on the way
2024
Medical product app · Frontend Developer

A pharmaceutical client’s app for a nasal-care medical product.
- › Frontend development, issue resolution, and release support
2020–23
Loyalty & coupon platform · Backend Developer

Coupons, reseller sales and claims, eligibility, and notifications for a pet-retail loyalty program.
- › Built and documented the .NET backend, PostgreSQL databases, environments, and an optimization migration
- › Investigated production shutdowns and downtime, and wrote the runbook for when the production API goes down
- › Brought back in 2023 for performance investigation and optimization, and helped bring production back up during an outage
- › Produced coupon-claim and bonus-point data exports for the client
- › Explained the platform’s architecture to the wider team in an internal “project field trip” talk
2023
Enterprise pharmaceutical app · Frontend Developer

An application for a global pharmaceutical company.
- › Built frontend features and adapted desktop-oriented designs for tablet use
- › Resolved production bugs
2023
Event ticketing platform · Backend Developer

Ticket reservations for live events.
- › Fixed overselling by moving reservation logic from PHP into SQL
2023
Automotive manufacturer · Automation

Operations tooling for a global carmaker.
- › Developed a task bot that checks file availability on client servers
2022
ChargeHeroes · API Lead

An Airbnb-style marketplace for renting out idle EV chargers.
- › Led API development for the marketplace
Acquired by a competitor a year later
2021
Web data collection · Developer

A fleet of scrapers collecting comparison and ranking data from websites.
- › Ran onboarding for new engineers and tracked scraper status and site-specific issues
2020–21
B2B document platform · Backend Developer

A drag-and-drop builder for creating, sharing, and signing documents between businesses.
- › Shipped backend fixes and documented the environments and APIs
2020
Social platform for businesses · Backend Developer

A social media platform built for business accounts.
- › Documented the backend and the Instagram API integration, and took part in v2 planning, estimation, and knowledge transfer
2019

Internal tooling · Junior Software Developer

Joined Netzon and started on internal tools before moving onto client platforms.

Freelance

Contract

2024 — Jun 2026

Multi-tenant ISP billing platform · Backend Developer

Customer and subscription management for internet service providers.
- › Built multi-tenant APIs serving many ISPs from one platform
- › Integrated Stripe and GoCardless payments
- › Built subscription recovery workflows for failed payments
2024

Platform product for an Australian client · API Developer

Contract API development for a platform-based product.

02 — Work

Selected work

Client work up front, side projects after. Each one solved a real problem for someone, usually me.

Genesys ─┐
         ├─▶ bronze ─▶ silver ─▶ gold ─▶ Power BI
Zendesk ─┘    raw     cleaned  star schema

  live APIs, or a 22-endpoint synthetic mock

Contact-centre data platform

internal

Contact-centre data lived in separate vendor tools (Genesys and Zendesk). The goal: one governed platform for KPI reporting, built and tested without ever touching production data.

Challenges

› Wire-level mock of both vendor APIs: 22 endpoints, seeded synthetic data, contract tests
› Bronze → silver → gold pipelines on Microsoft Fabric, with gold remodeled as a star schema for self-serve Power BI
› Repository governance in Terraform: PR plan comments, daily drift checks, apply on merge

microsoft-fabric python power-bi terraform wiremock pytest azure github-actions

internal work · code is private

ISP A ─┐
ISP B ─┼─▶  API  ─▶  billing ─┬─▶ Stripe
ISP C ─┘     │                └─▶ GoCardless
             ▼
   subscription recovery

ISP billing platform

freelance

ISPs run on recurring subscriptions, and every failed payment is a customer quietly slipping away. They needed one platform to manage customers and billing across many operators.

Challenges

› Multi-tenant APIs serving many ISPs from one platform
› Stripe and GoCardless payment integrations
› Subscription recovery workflows for failed payments

multi-tenant apis stripe gocardless billing

freelance · code is private

Re-Fuel

mobile

Drivers manually log gas prices and fuel consumption across the Philippines — no easy way to see trends or remember which station was cheapest last week.

Challenges

› GPS-based auto-capture within 150m
› On-device YOLOv8 price-board detection (ONNX)
› Offline-first IndexedDB cache

react capacitor typescript yolov8 onnx csharp dotnet-8 postgres

demo ↗

AI Resume Builder

web

Tailoring a resume to every job posting is tedious and error-prone. Generic resumes get filtered out.

Challenges

› PDF + DOCX resume parsing
› Playwright-based LinkedIn scraping
› Structured LLM output for tailored CV + cover letter

fastapi python react vite tailwindcss playwright openai-api pymupdf

demo ↗

GpuVramMonitor

desktop

Windows has no per-process VRAM tool for AMD GPUs. Task Manager shows only the total; AMD Adrenalin shows only the total.

Challenges

› Parsing GPU Process Memory performance counter instance names
› Resolving PIDs and excluding the inflated dwm.exe reading
› Real-time refresh with pause/resume

csharp wpf dotnet-8 windows performance-counters

github ↗

03 — Stack

What I work with

No progress bars. Day-job tools first, homelab toys last.

Languages: C# TypeScript Python JavaScript SQL
Backend & APIs: .NET FastAPI Node.js REST APIs Multi-tenant design pytest WireMock
Payments: Stripe GoCardless Subscription billing
Data: Microsoft Fabric Power BI PostgreSQL Redis SQLite
Cloud & DevOps: Azure Azure Front Door Terraform Bicep GitHub Actions Docker Nginx Linux GCP Oracle Cloud
Frontend & mobile: React Cordova Capacitor AppsFlyer Firebase Astro Tailwind CSS WPF
AI & ML: llama.cpp ROCm / HIP YOLOv8 ONNX OCR OpenAI API Playwright
Self-hosting: Proxmox WireGuard Tailscale Grafana n8n

04 — About

Beyond the Code

A peek at what I build and break when nobody's watching.

~/whoami backend tinkerer

I'm a backend developer by trade, but most of what I build starts with me getting mildly annoyed at something. If a tool feels clunky, expensive, or doesn't exist at all, my instinct is to just build it.

I like practical engineering. Systems that work quietly in the background. Code that solves a real problem without needing a slide deck to explain it.

Outside of work, I play pickleball, push consumer hardware further than it probably wants to go, and rebuild my homelab more often than I should. I once gave a company tech talk on 3D printing, and nobody has stopped me since.

Local AI

Running real LLMs on consumer GPUs at home

Homelab & Self-Hosting

Proxmox, Docker, and way too many VMs

Computer Vision

YOLO, OCR, and on-device detection pipelines

Automation

Cron jobs, scripts, and things that fix themselves

Pickleball

Regular games, questionable backhand

Hardware Experimentation

Pushing consumer parts beyond the spec sheet

// pet_projects.built_from_frustration

Built Because It Annoyed Me

Side projects born from small daily annoyances. Pick one — the right side cycles on its own.

The Immich photo library UI, self-hosted and showing ~4 TB of personal photos indexed and searchable.

The Jellyfin home screen with Anime and Movies libraries set up on a local server.

The Vaultwarden login screen — Bitwarden’s unofficial rewrite, running on a Raspberry Pi-class box.

A homelab monitor displaying a wall of red systemd service-failed messages — the day the boxes collectively gave up.

A stock Globe at Home ISP router with a troubleshooting sticker — the edge of the network before the real homelab starts.

A TP-Link ER605 Omada router being held up for a photo — the upgrade that retired the ISP one.

The back of a small form factor PC with USB, Ethernet, and power cables plugged in — a new homelab node being wired up.

Inside a mini PC chassis: two Seagate drives (a 4 TB BarraCuda and a 6 TB Enterprise) seated where an optical drive used to be.

Re-Fuel app showing detected gas prices for a Phoenix Super LPG station — Premium 98, Premium 95, Super Regular, and Biodiesel.

Re-Fuel in driving mode, automatically capturing a price board at a Phoenix station via the rear camera.

A Re-Fuel scan result with detection failed on both stations — honest documentation of the OCR’s bad days.

NetworkWatcher Grafana dashboard showing ISP latency and uptime per ISP.

A locally-hosted LLM chat showing a real-time token counter (32.8k) and an in-flight API request.

A local llama.cpp chat session running on a consumer AMD GPU, no cloud involved.

05 — Lab

The lab

Where the side projects live: a Proxmox box at home, an ARM VPS in the cloud, and a GPU that rarely gets a day off. Same habits as the day job, just with nobody to page but me.

Homelab

Proxmox · on-prem

├─ VM 100 · apps

├─ Immich (Docker)

├─ Jellyfin (native)

└─ qBittorrent (native)

├─ VM 101 · networkwatcher

Grafana dashboard graphing latency and downtime per ISP.

├─ VM 102 · OmadaController

└─ VM 103 · autoswitcher

Cron job that tells the Omada controller to fail over to whichever ISP responds fastest.

Cloud

Oracle Cloud · ARM64 VPS

├─ Nginx reverse proxy (public-facing)

├─ Re-Fuel API (.NET)

├─ AI Resume Builder (FastAPI)

├─ Portfolio tracking (Node + SQLite)

├─ PostgreSQL · Redis

├─ Ollama (embeddings)

└─ n8n · Vaultwarden · SillyTavern

Networking

├─ Tailscale mesh between every box

├─ WireGuard tunnels

└─ Cloudflare DNS

Workstation · local AI

inference ready

llama.cpp Local LLM server, Vulkan + ROCm backends b9106

Qwen3.6-35B-A3B MoE model, 3B active params Q4_K_M

AMD ROCm / HIP Native HIP backend on RX 7800 XT gfx1101

ComfyUI Image-gen workflow server ROCm

Chroma1-HD FLUX-based diffusion, pruned Q6_K

On the bench

→
Local AI assistant ecosystem
multi-backend proxy + embedding server

wip
→
Fuel-price recognition platform
end-to-end, beyond the Re-Fuel MVP

research
→
Faster local inference
HIP-native builds, draft-model speculation

shipping

06 — Contact

Let's talk

Open to backend, infrastructure, and AI roles. If you're hiring for something interesting, I'd like to hear about it.

email: jibnarvasa@gmail.com
linkedin: linkedin.com/in/bambaw-tumba
github: github.com/JuliusNarvasa
based in: Philippines · UTC+8

Download résumé say hi →

Where I've shipped

Netzon Tech

Freelance

Selected work

Contact-centre data platform

ISP billing platform

Re-Fuel

AI Resume Builder

GpuVramMonitor

What I work with

Beyond the Code

Built Because It Annoyed Me

Homelab

Re-Fuel

NetworkWatcher

Local Llama

The lab

Homelab

Cloud

Workstation · local AI

On the bench

Let's talk