On-site / Remote

Brian Vargas

Java Backend Developer

Hi, I'm Brian. I got hooked on figuring out how things work underneath, which is how I ended up in backend — building systems that still stand up when real people use them. Lately I've been going deep on cybersecurity and cloud. I'm looking for a team where there's always something left to learn.

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Brian Vargas

Brian Vargas

Java Backend Developer

ID: 000-013

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Focus
Backend · Microservices
Education
Systems Engineering · Konrad Lorenz
Leadership
Founder & Lead, K-Forge
Location
Bogotá D.C., Colombia
Availability
On-site / Remote
Brian Vargas

Profile

About Me

I'm a software developer with 3+ years building applications, focused on Java and Spring Boot on the backend and full stack capable with Angular and TypeScript. I design REST APIs, model relational databases and deploy with Docker. My profile is hybrid: I bring Cisco Networking Academy coursework (CCNA track) and CCST cybersecurity certification alongside cloud (Google Cloud).

3+
Years of Experience
31
Technologies
25
Courses & certificates

Soft Skills

  • Leadership & team management
  • Problem solving
  • Effective communication
  • Proactivity
  • Responsibility & integrity
  • Continuous learning
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Where I have worked

Experience

The roles I have held, with dates. The projects they produced have their own section.

  1. Founder & Backend Developer — Software Development Club

    2025 — Present

    K-Forge · Fundación Universitaria Konrad Lorenz

    University software development club I founded and lead: I coordinate the technical team, planning and architecture guidelines. Since 02/2026 I have been building its institutional website, now in production.

  2. Teaching Assistant — three subjects

    07/2024 — 06/2025

    Konrad Lorenz University Foundation · Part-time

    Selected on academic merit for three consecutive assistantships: Linear Algebra, Programming Techniques I and Programming Techniques II. I ran support sessions on object-oriented programming with Java, algorithmic optimization and debugging, and reviewed student code with a focus on clean-code practice.

Selected work

Projects

Systems I designed, built and shipped. Each one solved a real problem for real users — the code is public where the client allows it.

KApp — University mobile app

My thesis project, in the pre-proposal phase: six Java 21 microservices behind an API Gateway that centralizes routing and JWT validation, with Eureka discovery, OpenFeign inter-service calls, Resilience4j circuit breakers and PostgreSQL auditing. It runs on Docker Compose with CI on JDK 21. Native Kotlin and Swift clients are in development — the deployed demo is a front-end prototype with sample data, not yet wired to the backend.

  • Java
  • Spring Boot
  • Spring Cloud
  • Eureka
  • OpenFeign
  • Resilience4j
  • PostgreSQL
  • Docker
  • Maven
  • GitHub Actions
Code Prototype

AMODEL — Differential equations lab

A Minecraft server instrumented as an ecology lab: 27,648 measurements calibrate a logistic ODE with harvesting. The experiment falsified the classical model — a Holling Type II response cuts error by 81–91% in the supercritical regime, where the original predicted a collapse that never happened.

  • Python
  • NumPy
  • SciPy
  • pandas
  • Matplotlib
  • pytest
  • Docker
  • Linux CLI
  • VPS
  • Tailscale
Code Video soon

K-Forge — Club landing page

Institutional site for the university software development club I founded and lead. Built with Angular and Tailwind, it pulls member projects live from the GitHub API.

  • Angular
  • TypeScript
  • Tailwind CSS
  • HTML
  • CSS
  • Bun
  • GitHub API
  • Vercel
Code Live site

SpemTraductor — Cipher translator

Web translator for SpemCode, a 30-symbol substitution cipher used by the Spem Clan of Scout Group 74. Real-time bidirectional transformation with zero dependencies and no build step — what ships is the source.

  • JavaScript
  • HTML
  • CSS
  • Vercel
Code Live site

Professional Portfolio

This site. Where I publish my work in four languages, built with Astro, optimized for fast loading and deployed with continuous integration.

  • Astro
  • TypeScript
  • HTML
  • CSS
  • pnpm
  • CI/CD (GitHub Actions)
  • Vercel
Code Live site

Toolbox

Technologies

What I actually work with day to day — not a list of everything I have ever opened.

Frontend

  • HTML5 HTML5
  • CSS3 CSS3
  • JavaScript JavaScript
  • TypeScript TypeScript
  • Angular Angular
  • Astro Astro
  • Tailwind CSS Tailwind CSS

Backend & Languages

  • Java Java
  • Spring Boot Spring Boot
  • Node.js Node.js
  • Python Python
  • C++ C++
  • Kotlin Kotlin
  • Swift Swift
  • REST API Design REST API Design

Databases

  • PostgreSQL PostgreSQL
  • MySQL MySQL
  • MongoDB MongoDB
  • MariaDB MariaDB
  • Oracle Oracle
  • PL/SQL PL/SQL

Tools & DevOps

  • Git Git
  • GitHub GitHub
  • CI/CD (GitHub Actions) CI/CD (GitHub Actions)
  • Docker Docker
  • Linux CLI Linux CLI
  • Google Cloud Google Cloud
  • Cisco Networking Cisco Networking
  • Cybersecurity Cybersecurity
  • npm npm
  • pnpm pnpm
  • Bun Bun
  • Postman Postman

Verified

Education

Formal training and certifications, with the exams and scores behind them.

  1. CCST Cybersecurity — Cisco Certified Support Technician

    05/2026

    Cisco Systems · Official proctored exam (Certiport)

    Highlight

    Passed the official 100-160 exam with 974/1000 (700 minimum): 100% in network security, vulnerability assessment and incident handling.

  2. Cisco Networking Academy — 4 courses

    09/2024 — 05/2026

    Cisco · 4 digital badges and 4 certificates

    Ethical Hacker (05/2026): vulnerability recognition, penetration testing and security reporting. CCNA: Switching, Routing & Wireless Essentials (11/2025). Introduction to Cybersecurity (02/2026) and NDG Linux Unhatched (09/2024).

  3. Google Cloud — 16 courses and digital badges

    02/2026 — 05/2026

    Google Cloud Skills Boost

    Generative AI (6): concepts, ecosystem, agents and apps. Data & Analytics (5): data engineering, data lakes, warehouses, batch pipelines and ML. Infrastructure & Operations (5): core infrastructure, scaling, security and modernization.

  4. Platzi — Java & Spring

    02/2026

    Platzi · 2 certificates · 32 hours

    Java Spring and Java Spring Data JPA: direct reinforcement of my core stack in dependency injection, persistence layer and object-relational mapping.

  5. Systems Engineering

    2023 — 2027

    Fundación Universitaria Konrad Lorenz · Bogotá D.C.

    Training across the full Software Development Life Cycle, scalable solution architecture, databases, and network and infrastructure administration.

  6. Interamerican Leadership Training

    12/2023 — 01/2024

    World Organization of the Scout Movement · Santo Domingo

    International training in advanced leadership, assertive communication and social-impact project management.

  7. Web Programming

    04/2023 — 05/2023

    Oracle Next Education (ONE)

    Programming and logic fundamentals with a focus on JavaScript and web development. This is where my path began.

Along the way

Awards

Competitions, distinctions and decorations earned along the way.

Cisco Cyber Challenge

04/2026

Cisco Systems · Bogotá D.C.

Regional cybersecurity competition with a learning-first focus, held at Cisco Systems' Bogotá offices. I earned the voucher with which I sat and passed the CCST Cybersecurity exam.

Honorable Mention

02/2024

Fundación Universitaria Konrad Lorenz

Awarded for completing the full semester course load with a minimum 43/50 average, without failing any subject and with no disciplinary sanctions.

University Representative — National Programming Marathon

2024

Fundación Universitaria Konrad Lorenz

Part of the student delegation representing the university at the national contest against ~120 teams, the qualifier for the Latin American Regional. I solved algorithmic problems in Java, Python and C++.

BP (Baden-Powell) & Daniel Isaza Isaza Decorations

2023

Scouts of Colombia

The Scout Movement's highest youth recognition (BP) for exceptional leadership and commitment, and the Daniel Isaza Isaza decoration for distinguished service in the movement's development in Colombia.

Get in touch

Contact Me

Open to backend, full stack, DevOps and cybersecurity roles — and to any project with something new to learn. Write to me and I'll reply.

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Or reach me directly

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