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$ whoami

HARINDUWIJESINGHE

> Cyber Security Engineer & Full-Stack Developer

I build fast, reliable systems — then I try to break them. A security-minded full-stack engineer working from the IoT edge to the cloud, with security designed in from the first commit, not bolted on later.

./view-work ./contact

cat profile.json●

focus: system engineering / cyber security
role: security + full-stack
degree: bsc(hons) cyber security
services: vapt · full-stack · iot · cloud
status: open for projects

Colombo, Sri Lankascroll to continue↓

cyber-security/vapt/penetration-testing/threat-modelling/zero-trust/iot-security/webrtc/edge-computing/nvidia-jetson/raspberry-pi/kubernetes/terraform/gitops/payments/payment-gateways/full-stack/python/go/cyber-security/vapt/penetration-testing/threat-modelling/zero-trust/iot-security/webrtc/edge-computing/nvidia-jetson/raspberry-pi/kubernetes/terraform/gitops/payments/payment-gateways/full-stack/python/go/

01$ // 5 selected projects

modesizenamerolemodified

drwxr-xr-x1.1M01pqauth/Co-Author2025
01pqauth/2025
Co-Author · University Research · Go
// University research project — an OAuth 2.0 client SDK and cryptographic core for Go: token acquisition, PKCE, refresh, server discovery and JWT utilities. Security tooling, from the primitives up.
gooauth2pkcejwtcrypto
drwxr-xr-x9.4M02oms/Author / Full-Stack2023 · private
02oms/2023
Author / Full-Stack · Multi-vendor · Client Platform
// A multi-vendor order-management system (OMS): inventory, warehouse & logistics management, orders aggregated from connected websites and social media, and integrations with multiple local delivery providers.
omsmulti-vendorlogisticsintegrations
drwxr-xr-x5.9M03ipg-payment-hub/Author / Full-Stack2023 · private
03ipg-payment-hub/2023
Author / Full-Stack · Fintech · Payments
// A payment-management platform unifying payments across many e-commerce sites — a gateway layer over a master gateway (e.g. PayHere) that provisions and manages client merchant accounts. Integrated Stripe, Alipay, WeChat Pay, PayCorp, Banstac, PayHere & WebXPay.
paymentspayment-gatewaymulti-tenantfintech
drwxr-xr-x7.8M04vidusaviya/Full-Stack / ML2019
04vidusaviya/2019
Full-Stack / ML · Award-winning · EdTech
// ML-powered school platform with an exam-mark prediction & student-scoring engine (~80% accuracy) on a self-built ORM. Role-based & modular. 1st place @ HackXJr 2019.
c#asp.netmachine-learningrestful
drwxr-xr-x8.6M05sithiyam-ruwa/Mobile Developer2020
05sithiyam-ruwa/2020
Mobile Developer · Freelance · Google Play
// Cross-platform Blazor WebAssembly SPA/PWA for O/L & A/L students — built in 9 days, 10,000+ Play Store downloads, Admob-monetised & zero-maintenance.
blazorc#pwaplay-store

$ git remote -v → github.com/hariwij

02$ // tools of the trade

languages

–TypeScript
–Python
–C / C++
–C#
–Go

frameworks

–Next.js
–React
–Node.js
–ASP.NET Core

cloud & devops

–AWS
–GCP
–Docker
–Kubernetes
–Terraform
–ArgoCD
–GitHub Actions

iot & edge

–Arduino
–Raspberry Pi
–Nvidia Jetson
–MQTT

streaming

–WebRTC
–GStreamer
–FFmpeg

security

–Burp Suite
–Metasploit
–Ghidra
–Nessus
–Wireshark

03$ // who's behind the keyboard

Portrait of Harindu Wijesinghe — ~/portrait.jpg●

I'mHarinduWijesinghe—acyber-securityengineerandfull-stackdeveloperwhocaresasmuchabouthowsoftwareissecuredashowitfeelstouse.

I picked up an Arduino out of curiosity in 2016 and taught myself electronics and embedded programming with no formal guidance — from microcontrollers to Raspberry Pi and Nvidia Jetson edge devices. That hardware grounding is where my interest in security started: understanding how systems really work is the first step to breaking and defending them.

I hold a BSc (Hons) in Cyber Securityfrom SLIIT, but most of what I know is self-taught and shipped in production. I genuinely love building software — and security is the lens I build through: I'd rather learn how a system breaks than hope it never does. That mindset runs through everything I make, from the IoT edge to the cloud.

→ based in Colombo, Sri Lanka
→ BSc (Hons) Cyber Security · SLIIT
→ open to freelance & collaborations
→ security @ PromiseQ (DE, remote)
→ co-founder @ Bitzquad (agency)
→ hardware: Arduino · RPi · Jetson

$ cat awards.log

✦CLOUDWARS CTF — Orel IT— Winners2023
✦HackXJr — University of Kelaniya— 1st Place2019
✦GCE A/L — Technology Stream— Island Rank 7 (National)2021
✦Young Computer Scientists Competition — UoC— Finalist2019
✦Dialog App Challenge— Finalist2019

04$ // career history

f0c8d21(HEAD -> main)feat: BSc (Hons) Cyber Security — completed2026

SLIIT

Graduated with a cyber-security degree; now focused on secure, production-grade engineering.

e4a91c7feat: software engineer · part-time2024 — now

PromiseQ · Nov 2024 – present

AI video pipelines with WebRTC streaming on edge devices (Nvidia Jetson), LLMs & AI agents, plus DevOps: Docker, deployments and cloud infrastructure.

c2d5f83feat: full-stack developer2022

DEInclusive

Built and maintained an inclusive-recruitment platform — virtual career fairs, a job board and mentorship tools connecting diverse & underserved talent with employers.

b72f3d0feat: began BSc (Hons) IT — Cyber Security2022

SLIIT

Specialising in cyber security while working in industry.

9c15ae2feat: co-founded Bitzquad2021

Bitzquad — Software Agency

Co-founder, full-stack developer & technical manager — shipped secure web apps for local & foreign clients and led teams with Agile.

5d8b0f4feat: freelance mobile / desktop / web / IoT dev2019

Freelance — Remote

Published Sithiyam Ruwa (10k+ installs) and built IoT / embedded projects alongside production web systems.

0a3e6c1(root)init: first commit2016

Self-taught

Picked up an Arduino out of curiosity; taught myself electronics, embedded programming and later Raspberry Pi / Jetson edge devices.

05$ // open for freelance & collaboration

let'sbuildsomething.

Open to freelance projects and interesting collaborations — security, full-stack, IoT/edge or something in between. Drop a line.

send a messageopens the terminal composer

or reach me directly$hello@hariwij.comusually replies within 24h

./elsewhere