15+ Years. 1,000+ Fixes. Always Shipping.
I’m David Lopez, a Top Rated senior developer on Upwork with a proven track record of client satisfaction. With deep expertise in Laravel and modern JavaScript frameworks, I help teams bring greenfield SaaS products to life—or jump into messy legacy code to untangle the chaos and get things back on track.
Explore my projects and contributions on GitHub.
Senior Full-Stack Consultant
Freelance · Remote
2015 - Present
IA-focused development: LLM features, RAG pipelines, vector search, and prompt engineering.
Laravel APIs with Vue/React UIs integrating model inference, background jobs, and webhooks.
Data ingestion, evaluation loops, and analytics dashboards to measure model quality and ROI.
CI/CD and containerized runtimes for dev/staging/prod IA environments with robust observability.
Full-Stack Developer
KernWiFi
2015 - Present
Mikrotik network ops: routing, QoS, VLANs, and monitoring for WISP infrastructure.
RADIUS AAA design and integrations for authentication, accounting, and policy control.
Laravel APIs that automate client onboarding, billing workflows, and network tooling.
Vue frontends for dashboards, provisioning, and real-time status views.
Network & Backend Engineer
Various ISP and Telecom Projects (LATAM & US)
2010 - 2015
Designed and deployed over 1,000 MikroTik RouterBOARD devices worldwide.
Specialized in hotspot management, dynamic scripting, and secure reverse proxy setups.
Combined networking and backend skills to optimize bandwidth and system automation for ISPs.
Certified MikroTik Engineer
MikroTik Training Partner (LATAM)
2014
Bachelor’s in Computer Engineering
University of Tachira (UNET)
2002 - 2007
Explore the technical expertise I use to solve real business challenges.
15+ years of experience crafting scalable backends, APIs, and enterprise logic with Laravel.
Expert in building modern, interactive UIs using Vue and React — from dashboards to client portals.
Designs and implements robust RESTful APIs that integrate seamlessly with external systems.
Builds custom WHMCS modules and payment integrations like St. George Bank and Stripe.
Certified MikroTik Engineer with 1,000+ devices configured, including reverse proxy and hotspot setups.
Automates processes using Laravel, Shell scripts, and WHMCS hooks for efficient workflows.
Design and operate end-to-end IA stacks: model serving (OpenAI/local), RAG pipelines, vector DBs (Pinecone/pgvector), orchestration (LangChain/LangGraph), CI/CD, evals, and observability.
Optimize prompts, context windows, and caching; batch/reroute requests; compress contexts via embeddings; track token spend and latency to hit reliability SLAs.
Delivers high-impact results in distributed teams, with clear communication and autonomy.
I help startups and growing companies turn complex challenges into scalable, high-performance software—using Laravel, Vue.js, and React. Explore how I bring clarity, speed, and technical leadership to every project.
Built a custom fundraising platform for athletes to manage and promote sponsorship campaigns. The app automates email outreach, integrates payment systems, and supports peer-to-peer referrals to increase fundraising success.
Led full-stack development using Laravel and Vue.js. Architected core modules for campaign management, Stripe integration, email automation, and a business sponsorship search tool powered by Yelp and TripAdvisor scraping.
Contaplex is a B2B fintech platform that automates accounting workflows and ensures tax and regulatory compliance for LATAM businesses. The tool connects with multiple banks and ERP systems for real-time data sync.
Led the development of a robust financial platform by architecting and implementing critical backend services in Laravel. Integrated external APIs for real-time data reconciliation, electronic invoicing (SII), and advanced financial reporting.
Discover what clients have to say about their experiences working with me.
" David is a great developer, he did outstanding work. "
Daniel H
PHP Senior Developer
" David is a guy and very professional, thanks so much David. "
Lender N
CEO
" Working with David was a game-changer. He seamlessly integrated complex APIs and ensured our application's scalability. His problem-solving skills are top-notch. "
Andres Araneda
CEO HSD
Whether you’re launching a new product or scaling an existing platform, I bring 15+ years of experience to turn complex ideas into performant, maintainable software.
From scalable architecture and API integrations to practical tips in Laravel, Vue.js, and beyond—explore in-depth articles that reflect my hands-on experience and help fellow developers, teams, and businesses build smarter, faster, and better.
I was part of the team that built Australia's Yaesu IMRS network with KernWi-Fi. Here's what we learned applying carrier-grade design principles to community infrastructure—and why it matters.
When teams talk about "adding AI," they often imagine magic. In practice, shipping reliable IA means disciplined engineering—clear objectives, good data, fast feedback, and ruthless cost control.
