Who I Am

Software developer building scalable web solutions alongside teams. I learn with the community and share what I discover.

Who I Am

I'm Sergio Campbell (Alkiory), a software developer who builds scalable, people-centered web solutions. I work mostly with React, Angular, and TypeScript — but I'm equally at home adopting whatever tool the team needs, as long as performance, accessibility, usability, and SEO keep their seat at the table. I thrive in agile, collaborative environments, and I design architectures that help the team ship their best work. Over the years I've led complex platforms alongside teams of all sizes, where innovation and continuous improvement have always been a shared effort.

In this portfolio I share some of my featured projects and recent articles — pick whatever catches your eye and discover what I've been learning along the way.

If you have any questions or want to collaborate, feel free to get in touch. I'm always open to new opportunities and challenges.

Soft Skills

Hands-on leadership

I guide teams toward robust technical solutions and scalable architectures without losing sight of the people. I ask before I impose, and I celebrate small wins as much as big ones.

Genuine collaboration

Great products are born from great teams. I foster an environment where building together is the norm — from the first architecture sketch to the last line of code.

Clear communication

I ask before I assume, document what I discover, and translate technical complexity into actionable conversations. A well-explained decision is worth more than a fast, opaque one.

Initiative with purpose

I see gaps to improve, I name them, and I propose a path. I keep the team aligned as I move forward, and I recognize when it's worth pausing to recalibrate.

Active listening

Listening before speaking isn't just manners — it's how I uncover real constraints, unspoken risks, and needs that often don't make it onto the board.

Everyday empathy

Software is for people. I treat teammates and users with the same curiosity and respect, and I give feedback carefully even when it's uncomfortable. A kind team builds better products.

Technical Skills

Frontend

TypeScript

React

Angular

Redux

Next.js

Astro

React Query

React Native

Backend

Node.js

NestJS

Python

SQL

NoSQL

REST

GraphQL

Testing & QA

Jest

Playwright

React Testing Library

DevOps & Cloud

GitHub Actions

Google Cloud

AWS

Firebase

Docker

Design

Figma

Tools

Git

GitHub

VS Code

Postman

Bruno

Antigravity

Jira

Slack

Trello

Confluence

Intelligence Artificial

Github Copilot

ChatGPT

Gemini

Claude

DeepSeek

LLaMA

Education

Software Development Technologist

Universidad Politécnico de la Costa Atlántica

2014 — 2020

Software architecture, distributed systems, and web engineering.

Software Development Technician

SENA Colombo Alemán

2011 — 2013

Backend foundations, databases, and agile practices.

Languages

EnglishB2
SpanishNative

Certifications

Work Experience

My full professional journey, from the most recent to the first.

Oct 2018 - Present

Senior Fullstack Developer

Freelance ↗

Independent fullstack development with React, Angular, and modern stacks, focused on scalable architecture, user-centered design, and front-backend integrations.

View details

Contributed to impactful projects using React, Angular, HTML, CSS, Markdown, Git and GitHub, delivering scalable and user-friendly solutions.
Improved software architecture and design, ensuring best practices across the full SDLC.
Built responsive web/mobile features with React and Redux, with cross-browser focus.
Acted as a key bridge between marketing and IT, integrating frontend assets with backend systems.
Applied Azure DevOps best practices to optimize cloud administration workflows.

Jul 2025 - Jun 2026

Senior Frontend Developer

CAS Training ↗

Corporate frontend development with React, TypeScript, and Tailwind on Turborepo monorepos; testing with Vitest, Zod-backed validation, and optimized pipelines.

View details

Complex React + TypeScript components with state via Redux/Hooks for scalable solutions.
Robust Vitest test suites, static analysis and security with SonarQube and Fortify.
Responsive UIs with Tailwind, translating Figma prototypes with high fidelity.
Monorepos with Turborepo, PNPM, and full i18n.
Zod schema validation ensuring backend integration integrity.
Virtualization and Nexus-managed artifacts for optimized CI/CD.

Ago 2024 - Feb 2025

Senior Frontend Developer

Private Company

React/TypeScript frontend with real-time data flows; +25% efficiency wins via React-Query and improved reliability with PM2 process supervision.

View details

React + TypeScript frontend built from Figma designs.
Real-time data with React-Query and useContext: +25% in processing/query efficiency.
Continuous PM2 monitoring for diversified staging/production and higher reliability.
Full lifecycle ownership from planning to deploy, with crisp docs and iterative improvements.
Scalable, high-performance solutions optimizing operational workflows.

Ene 2024 - Jul 2024

Senior Frontend Developer

Bchange ↗

Frontend leadership with React/TypeScript on AWS; +15% user satisfaction and +25% reliability gains, leveraging generative AI tooling to ship faster.

View details

Coordinated dev teams to deliver high-quality software on time.
React.js + TypeScript frontend improvements yielding smoother UX.
Maintenance and scalability: +25% system reliability.
Third-party API integration optimizing server-app interactions.
UI improvements with HTML/CSS/JS: +15% user satisfaction.
AWS deployments/ops with uptime guarantees.
Agile process, version control, and clear documentation.
Generative AI tooling to accelerate dev and improve efficiency.

Dic 2022 - Dic 2023

Senior Frontend Developer

Evolution Code ↗

Tech lead with React/Next.js/TypeScript; on-time delivery, team mentoring, and automated commit pipelines that cut cycle time by 20%.

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Multi-project team leadership within budget and schedule.
Communication, leadership, and problem-solving skills.
Apps with React, Redux, Next.js, TypeScript, Husky, Jest, JS, HTML, Git, Terminal.
Commit/push pipelines with automated checks: -20% cycle time.
Frontend best practices and code quality.
Continuous process improvements and client-driven innovation.

Jun 2022 - Mar 2023

Frontend Developer

Zemoga ↗

Agile frontend work with Angular/React on AWS, translating Figma into cross-platform interfaces under tight delivery deadlines.

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Validated creative proposals against design best practices.
Agile SDLC with fast, high-quality iterations.
Cross-functional work with sales, CX, and design.
Well-tested, documented code for higher maintainability.
Cross-platform features in Angular and React (HTML/CSS/JS).
Translated UX/business requirements into functional solutions.
Marketing/IT bridge for tight front-backend integration.
AWS + Node.js best practices for internal project scalability.

Feb 2022 - Jun 2022

Implementation Leader

Devitech ↗

Implementation lead for Node.js services with PM2, managing fullstack squads and APIs aligned with SCRUM.

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Modular Node.js backend deployments with PM2.
Exhaustive POS testing and transactional process supervision.
Fullstack squad management (Node.js, TS, React, HTML/CSS/JS, Bootstrap, MUI).
API routes/services design and implementation for seamless integration.
SCRUM collaboration with clients every sprint.

Nov 2021 - Feb 2022

Fullstack Developer

Devitech ↗

Fullstack development with React/Node.js/TypeScript; legacy codebase refactor and 20% reduction in operating costs.

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Defined ambitious but realistic milestones for on-time delivery.
In-situ field testing validating performance and functionality.
Legacy codebase refactor and modernization: -20% operating costs.
React, Node.js, TypeScript, HTML5, CSS3, SQL, and REST APIs for scalable solutions.

Jul 2017 - Dic 2017

Programador Técnico

ITA SA - Inversiones tecnológicas de América SA

.NET MVC apps, BI tooling, and CI pipelines in a SQL Server enterprise environment.

View details

Designed and developed solutions with the testing team to meet requirements.
BI apps and tooling to capture and exploit business metrics.
Server-side code testing to validate changes.
CI pipelines simplifying deployments.
Web apps on SQL Server and .NET MVC sites.

Thanks for stopping by — I hope you find something that resonates.

I also write on this blog for a simple reason: every post is a conversation I wish I had read before starting projects. If that resonates, come along for the ride.