I Build SystemsThat Don't Break.Or Slow Down.
What I Build
Here are the real problems I solve. Each expertise area represents years of hands-on experience building scalable systems, automating workflows, and delivering measurable results. Scroll through to explore the technical depth and specific capabilities.
Zero-Downtime Database Migrations
Use Case
Legacy systems with millions of records need migration to modern databases without losing data or disrupting service. Traditional migrations cause downtime measured in hours.
32,000+
Users Migrated
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Multi-Gateway Payment Integration
Use Case
Handle payments from multiple gateways (PayValid, AvallPay, etc.) with different protocols, error handling, and requirements. Need smart routing to prevent payment failures and optimize costs.
$2M+
Typical Volume
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High-Performance System Optimization
Use Case
Applications suffering from slow load times, high latency, and poor scalability. Users experiencing degraded experience under load.
40-60%
Average Improvement
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Scalable Microservices Architecture
Use Case
Monolithic applications struggling to scale. Need to handle millions of concurrent users with independent service scaling.
100K+
Concurrent Users
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Real-Time Features & Live Updates
Use Case
Applications need live data updates without polling. Users expect instant notifications and real-time collaborative features.
<100ms
Latency
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Business Process Automation
Use Case
Repetitive business processes consuming manual effort. Different systems need to communicate and share data seamlessly.
50+
Workflows Built
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Technologies & Tools
Here's the full toolkit I use to bring these solutions to life. Each technology is carefully selected and mastered for specific use cases.
Featured Projects
Explore a curated selection of my work. From personal projects to enterprise solutions, each showcasing expertise in automation, architecture, and modern development.
Intelligent WhatsApp Management System for Colombian Coffee Region Companies
WhatsApp platform with Node.js + React + Redis
Client: Mid-sized companies in Colombia's coffee region (retail and services sectors)
Private Repository
Projects
Live
Personal
Clients
Hello, I'm Christian
About Me
Hey, I'm Christian — a full-stack developer based in Pereira, Colombia. I obsess over one thing: building software that works exactly when it needs to, at the scale it needs to, without drama. I've migrated 32,000+ users between databases without a single incident, and I'm genuinely proud of that.
Full Stack Developer & Software Architect
Finova • Dec 2024 - Present
Architecting scalable full-stack solutions across frontend and backend systems. Contributing to system design decisions, infrastructure optimization, and automation of deployment workflows. Building with React, Node.js, and cloud technologies.
React & Frontend Architecture
Finova • Aug 2024 - Dec 2024
Built component architectures and frontend systems using React.js and modern tools. Focused on scalability, performance optimization, and maintainable code structures that support growing product complexity.
Freelance Architecture & Development
Various Clients • 2021 - 2024
Designed and built technical solutions across diverse tech stacks. Worked with startups and enterprises to architect systems, optimize workflows, and deliver production applications. Gained expertise in different architectural patterns and client requirements.
Frequently Asked Questions
Answers to common questions about services, technologies, and capabilities.
I specialize in full-stack development with TypeScript, React, Node.js, and Next.js. For backend systems: PostgreSQL, MongoDB, GraphQL, and microservices architecture. For automation: n8n, Zapier, and custom integrations. Cloud infrastructure: AWS (EC2, Lambda, RDS, S3). Real-time systems: WebSockets, Socket.io. I also work with Docker, Kubernetes, and DevOps tooling.
I've led database migrations for 32,000+ users with a 0.004% error rate and zero downtime. This involved blue-green deployments, careful data validation, and rollback strategies. I specialize in planning and executing critical infrastructure changes while maintaining system availability.
Yes. I've built multi-gateway payment systems handling $2M+ daily transaction volume. Experience includes Stripe, PayPal, custom payment processors, PCI compliance, secure data handling, webhook management, and reconciliation systems. I focus on reliability, security, and fraud prevention.
Yes. I'm based in Colombia (Pereira, Risaralda) and offer nearshore development services. I work with startups, mid-market companies, and enterprises across North America, Latin America, and globally. Flexible engagement formats: full-time, part-time, contract, or strategic advisory.
I design systems with scalability, maintainability, and business goals in mind. I use microservices for complex systems, evaluate trade-offs between different architectural patterns, and ensure systems can handle 100K+ concurrent users. I focus on clear documentation, monitoring, and operational simplicity.
I've built real-time web applications with <100ms latency using WebSockets, Socket.io, and server-sent events. I design efficient data synchronization, handle connection management, and optimize for performance and scalability.
Primarily n8n for enterprise automation workflows. I've automated 50+ business processes with <0.1% error rates. I also work with Zapier, Make, and custom automation solutions. My focus is on reliable, maintainable workflows that integrate with existing systems.
Yes. I've achieved 40-60% performance improvements across projects. This includes database query optimization, caching strategies, code splitting, load balancing, CDN implementation, and infrastructure optimization. I focus on identifying bottlenecks and delivering measurable improvements.
Trusted by Developers
Hear directly from developers I've collaborated with on real projects. Their insights reflect the impact of clean architecture, thoughtful code, and genuine partnerships.
"I have been following Christian's progress as a developer and I can say he is a fast learner and understands programming principles, and he applies them to his work."
Mauricio Marín Jimenez
Senior Developer at IKEA
Colleague"Christian has an exceptional ability to write testable code. Working with him on QA integration was seamless—his attention to detail and clear communication made bug discovery and resolution incredibly efficient. He's not just a developer, he's a collaborator who thinks about the whole picture."
Alejandro Vargas Méndez
QA Engineer
Colleague"Christian's backend architecture decisions have shaped how our systems scale. His systematic approach to complex problems and mentorship of junior developers shows maturity beyond just coding. Having him as a technical peer has elevated our entire team's standards."
Jean Fernando Durán Zapata
Backend Developer
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"I have been following Christian's progress as a developer and I can say he is a fast learner and understands programming principles, and he applies them to his work."
Mauricio Marín Jimenez
IKEA
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Contact Information
Not Sure If I'm the Right Fit? Ask Anyway.
The worst that happens is I point you in the right direction. The best? We build something you're proud of. Send a message — no commitment, no pressure, just a conversation.