Senior Software Engineer

Open to strong engineering opportunities

Senior engineer for teams that need product sense and clean execution.

I build React Native apps, React and Next.js frontends, and Node.js systems with a strong eye for product quality. The work combines practical engineering, polished interfaces, and ownership from idea to shipped experience.

Best fit: teams that want a senior engineer who can ship, raise UI quality, and help products feel more credible in the hands of users.

React NativeReactNext.jsNode.jsTypeScriptProduct-focused UI

2x Founder

Web Studios and Avryq, built and shipped end to end

Senior IC

hands-on across product, UI, and delivery

Mobile + Web

React Native, React, Next.js, Node.js

Juan Martinez portrait

Location

US

Evansville, Indiana

Focus

Core

React, React Native, Next.js, Node.js

Working style

Clean implementation, product-minded thinking, and front-end polish without unnecessary noise.

ReactNext.jsTypeScriptNode.js
Web Studios

Web Studios builds restaurant websites and direct online ordering platforms.

This is the business side of my work: a complete platform for restaurants, pairing a fast, branded website with direct online ordering, owner dashboards, and analytics, with no commission on sales.

Web Studios preview

Featured business

Web Studios

A complete restaurant platform: a branded website connected to direct online ordering, customer accounts, an owner dashboard, and real-time analytics, with no commission taken on sales and everything hosted, maintained, and supported directly.

Online orderingOwner dashboards0% sales commissionManaged hosting & support

Direct online ordering

branded checkout built into the restaurant's own site, not a third-party marketplace

0% sales commission

restaurants keep 100% of order revenue, aside from standard payment processing fees

Owner dashboards & analytics

real-time orders, revenue, and customer insight without guesswork

What I offer

A restaurant website and direct ordering platform, so orders come through the restaurant's own site instead of a third-party marketplace.

Why it matters

Most restaurants lose margin to delivery-app commissions and have no direct line to the person maintaining their site. Web Studios fixes both with a platform the restaurant owns and a founder who answers when something breaks.

Typical outcomes

Faster checkout, fewer missed orders, clearer sales data, and a platform that stays actively maintained instead of left to break.

Juan Martinez working portrait
About

Engineering taste shaped by product thinking.

From healthcare to tech, the work has always been grounded in solving real problems. That shows up today in practical architecture, clean interfaces, and software that feels considered from the first interaction.

How I build

Clear structure, refined UI, maintainable code, and pragmatic decisions.

What I focus on

Scalable products, real-time systems, mobile experiences, and polished UX implementation.

Why it matters

Good software should earn trust quickly and still hold up when the product grows.

Expertise

Capabilities across mobile, web, and product systems.

A focused mix of front-end craft, mobile product development, and backend implementation for software that needs to feel polished and hold up under real use.

React Native product development

Cross-platform apps built with strong interaction quality, clean state management, and practical product thinking.

Next.js and premium front-end systems

Modern web products with strong layout discipline, polished UI implementation, and performance-minded delivery.

Backend and real-time architecture

Node.js, TypeScript, APIs, live updates, and product infrastructure that support responsive, scalable user experiences.

Product-minded engineering execution

The work balances code quality, product clarity, ownership, and the finish needed for software to feel credible.

Technical arsenal

TypeScript

React

React Native

Next.js

Node.js

Tailwind CSS

Expo

Express.js

MongoDB

Beyond the code

Leadership
Communication
Product thinking
Ownership
Experience

Roles, ownership, and the kind of product work I've led.

The left side was wasting space, so this section now opens tighter and lets the actual experience carry the weight.

100K+

concurrent users supported in production systems

Founder

business owner and client-facing builder

Mobile + Web

product execution across both surfaces

Avryq

Co-Founder & Software Engineer, Full-Stack

Jan 2026 - Present

Co-founded and helped design, build, and launch a real-time local discovery app for iOS and Android connecting users with nearby events, businesses, organizations, and community updates.

Built the mobile app in React Native, Expo, and TypeScript, including live map discovery, event pins, social posts, comments, membership groups, followers/following, chat, and push notifications.

Built and maintained REST APIs in Node.js, Express, TypeScript, MongoDB, and Mongoose, covering database modeling, authentication, pagination, and media storage, and contributed to product strategy, UI/UX decisions, and App Store and Google Play release processes.

Visit Avryq

Web Studios

Founder & Lead Software Engineer

Mar 2025 - Present

Design, build, and support a restaurant website and direct online ordering platform, including owner dashboards, real-time analytics, and Stripe-powered checkout.

Lead both client-facing product direction and hands-on implementation end to end, from onboarding through ongoing hosting, maintenance, and support.

Venue Platform

Founding Senior Software Engineer

Nov 2024 - Jan 2026

Architected scalable, secure backends in TypeScript and Node.js, cutting server response times by 20% and improving performance by 25%.

Built real-time, encrypted APIs supporting 100K+ concurrent users across platforms.

Boosted system reliability by 20% through proactive security and performance optimizations.

Venue Platform

Founding Software Engineer

Apr 2024 - Nov 2024

Delivered a cross-platform MVP in 6 months using React Native and TypeScript, improving development efficiency by 30%.

Released daily features with a security-first mindset, reducing crash rates by 25%.

Owned the full feature lifecycle from Figma to deployment with minimal oversight.

Freelance

Software Engineer, Full Stack

Oct 2022 - Apr 2024

Delivered iterative, client-driven web solutions with a 20%+ boost in usability and engagement.

Streamlined development workflows while focusing on high-quality, user-centric design.

Credibility

More than just implementation

I am comfortable moving between UI engineering, backend decisions, product detail, and delivery planning when a project needs full ownership.

Credibility

UI polish with technical credibility

I care about how software feels in the hand, but the visual layer is always backed by structure, maintainability, and real engineering discipline.

Credibility

AI used strategically

I use AI-assisted development tools like Cursor to accelerate execution, tighten iteration loops, and improve quality without outsourcing judgment.

Contact

Let's build something that feels sharp from day one.

Whether you need a strong front-end build, a React Native product, or a senior engineer who can help shape execution end to end, I'm open to the right opportunities.

juanmartinez5678@hotmail.com