Hello world!
I build modern software that works in the real world.
I’m Joskua Olivares — a senior software engineer with strong product sense. I help founders and teams design, build, and ship web apps, mobile apps, and internal systems that are reliable, usable, and ready for production.
I believe technology should serve humanity.
Why Teams Work With Me
I translate business needs into working software
I focus on outcomes, not buzzwords—turning real business problems into practical, scalable solutions.
I communicate clearly
No unnecessary tech jargon. Clear explanations for both technical and non-technical stakeholders.
I take ownership and deliver
I treat products like they’re my own—taking responsibility from idea to production.
Experience across startups and enterprise systems
I’ve worked in fast-moving startups and complex enterprise environments with real constraints.
5+ years shipping production software across SaaS, FinTech, logistics, and marketing platforms.
What I can help you build
From mobile and web applications to backend systems and product strategy. I help turn ideas into production-ready software.
Featured Work
A few projects where I owned delivery end-to-end, led teams, and shipped production systems.
Billboard Planet — Flutter mobile app
Senior Engineer · End-to-end ownership
Rebuilt a legacy Android-only app into a modern cross-platform Flutter application used by field teams in the outdoor advertising industry.
What it does / My role / Impact
- Helps installers manage work orders (install, remove, switch billboards).
- Uploads proof of job completion from the field.
- Designed, built, managed, and deployed the app independently.
- Used across 4 countries · Adopted by 6 client companies.
Nexus — Marketing & Loyalty SaaS
Tech Lead · Product & Systems Engineering
Led technical and product execution for a marketing and loyalty SaaS platform used by multiple brands.
Responsibilities
- Defined system architecture and integrations.
- Translated business requirements into technical roadmaps.
- Led sprint planning and technical decision-making.
- Owned production reliability and delivery.
Factrónica — Website redesign & rebuild
Product delivery · Web
Redesigned and rebuilt an outdated non-responsive HTML site into a modern, mobile-first experience with improved usability and performance.
Work included
- Full redesign and implementation.
- Coordination with a graphic designer.
- Performance and usability improvements.
- Tech: Framer (chosen intentionally for speed and time-to-market).
Online Nexus Targeting Portal
Rapid delivery · Business-facing portal
Delivered a business-facing portal under tight timelines, prioritizing usability and execution speed with pragmatic tooling choices.
Highlights
- Tight timelines with rapid iteration cycles.
- Focused on usability for business users.
- Pragmatic tooling selection for delivery speed.
K1 Electrical Contractors Ltd
End-to-end delivery · Small business website
Delivered a maintainable, responsive website emphasizing clarity, structure, and long-term ease of updates.
Focus
- Clarity-first information architecture.
- Mobile responsiveness and accessibility.
- Maintainable structure for future updates.
About Me
Hi, I’m Joskua — a freelance developer based in Mexico City. I believe that technology should make life easier, smarter, and more human.
Over the past 5+ years, I’ve worked with teams across the US, Mexico, Central America and Asia, building real-world systems that power loyalty programs, optimize business processes, and bring ideas to life.
I’ve led development teams, launched cross-platform apps, and integrated solutions with POS systems and payment platforms — always with a focus on clean code, usability, and impact.
Languages I speak fluently: Spanish, English, French
What I Do
I help founders, businesses, and teams turn ideas into working software.
Tech Stack
Favorites
Also Experienced In
Projects & Experience
QuantumGo App
A Flutter mobile app launched in multiple countries for technician scheduling.
Nexus Clover App
An Android app for POS loyalty integration, built with the Clover SDK and custom backend logic.
Fiserv Integrations
Handled hosted payment and card-present transaction APIs for a Fortune 500 fintech company.
Automation & Internal Tools
Built dashboards, web scrapers, and internal tools to streamline operations across the Americas.
Results That Matter
350%
increase in email system performance
50%
faster backend query times
39+
physical store locations scaled with loyalty
↓ 26%
incident ticket rate from 34% to 26%
3 Countries
successful app launches (US, MX, CR)
Let’s Work Together
Have a project in mind? Let’s talk.