Edgar Ghahramanyan – profile photo

Edgar Ghahramanyan

Spring Boot Security & Full-Stack Engineer — Mississauga, GTA

I'm a Senior Software Architect with 15 years at TMX Group, the company behind the Toronto Stock Exchange, where reliability and security are not optional. Through Carefree.Coding I bring that same discipline to secure, scalable systems, AI, and fast, modern websites for businesses across the GTA, Canada, and internationally.

What I Do

Security-First Backend

Spring Boot, Spring Security, OAuth2/OIDC, JWT, OWASP Top 10. I design authentication and authorization flows that are solid by default — not bolted on after the fact.

Websites & Web Apps

Modern, fast, accessible sites and web applications using React, TypeScript, and proven backend stacks. I've built and maintained production sites for both commercial and non-profit clients, including sawmillsid.ca and helpinghippies.ca.

Scalable Systems

Microservices, modular monoliths, event-driven architecture. AWS, containers, Infrastructure as Code, observability, and SRE practices for systems that grow without falling over.

Mentoring

Career, code review or system design questions? I'm happy to talk them through — just ask.

AI & Machine Learning

Local LLMs with Ollama and AI agents built on Ollama and LlamaIndex. I build and train models and deploy them to production — served behind secure, scalable APIs and monitored like any other critical system, not left as a notebook experiment.

Desktop Apps & Games

Windows desktop software and indie PC games for Steam, built in C++ and Java/Kotlin. See desktop apps and games.

Core Stack

Backend

Java 17+, Kotlin, C++, Spring Boot, Spring Security, Spring Data, Hibernate / JPA, PostgreSQL, Redis

Frontend

React, TypeScript, HTML5, CSS3, Bootstrap, Tailwind — responsive and accessible by default

Cloud & DevOps

AWS (EC2, RDS, S3, CloudFront), Docker, Kubernetes basics, Terraform, GitHub Actions, CI/CD pipelines

Security

OAuth2, OIDC, JWT, OWASP Top 10, threat modeling, SAST/DAST, penetration testing, secure headers, CSP

Observability

Structured logging, Micrometer/Prometheus, Grafana, distributed tracing — so you can see what's happening in production

Infrastructure

Linux administration, networking, VLANs, Proxmox, home lab, self-hosted services, smart home automation

AI & ML

LLMs with Ollama, AI agents with Ollama and LlamaIndex, model building and training, production deployment behind secure, scalable APIs

Desktop & Games

C++, Java/Kotlin, JavaFX, Windows desktop apps, and indie PC games for Steam

How I Work

I'm direct and low-overhead. I prefer a short call or written brief to understand your goals and constraints, then I get to work. You'll get clear scope, honest timelines, and deliverables that are maintainable — not just impressive in a demo.

I'm based in Mississauga and work with clients across the GTA, the rest of Canada, the USA, and internationally. Most work happens remotely; on-site visits in the GTA are available for the right projects.

Response time is typically same-day on weekdays. After an engagement, I'm available for follow-up questions — I don't disappear after the invoice.

Ready to talk?

Tell me about your project, timeline, and constraints. I'll suggest a clear path forward.

Get in Touch
Areas served: Mississauga · Toronto · Brampton · Oakville · GTA • Services: Web design & maintenance · Smart home & home networks · Computer repair & PC builds · Custom software & security on request
GTA first, then Canada, USA, and international clients.
Contact Edgar