Hi, I'm Cristoval 👋
Independent & highly experienced software engineer based out of San Francisco, California - United States. Specializing in fullstack development with a deep expertise in robust payment solutions and scalable system architecture.
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About

Cristoval is many things, dedicating most of his time as a software engineer and web developer building scalable systems with a sharp focus on modern payment solutions. His path into tech was far from conventional. After excelling in high-level sales for five years, Cristoval committed to a career pivot through self-study, bootcamps, and real-world freelance execution in his community. That journey gave him not just technical depth, but the strategic thinking necessary to build software that serves business goals. Today, he serves as a consultant to one of the biggest clients in Denmark, inclusive he helps other startups, SaaS companies, service businesses, and platforms to implement and optimize Stripe powered systems that are compliant, fast, secure, and designed for growth. From custom POS builds and multi-party payouts to subscription flows and developer starter kits, complexity becomes clarity. Whether you’re launching something new or scaling something that works, I’m here to build the backbone of your business with systems you can trust.

Work Experience

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Solano Advocates For Victims of Violence

August 2024 - current
Software Engineer
Implemented the Bitcoin discreet log contract (DLC) protocol specifications as an open source Typescript SDK. Dockerized all microservices and setup production kubernetes cluster. Architected a data lake using AWS S3 and Athena for historical backtesting of bitcoin trading strategies. Built a mobile app using react native and typescript.
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COPARK A/S

Janurary 2024 - current
Software Engineer
Implemented the Bitcoin discreet log contract (DLC) protocol specifications as an open source Typescript SDK. Dockerized all microservices and setup production kubernetes cluster. Architected a data lake using AWS S3 and Athena for historical backtesting of bitcoin trading strategies. Built a mobile app using react native and typescript.
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Shopify

January 2021 - April 2021
Software Engineer
Implemented a custom Kubernetes controller in Go to automate the deployment of MySQL and ProxySQL custom resources in order to enable 2,000+ internal developers to instantly deploy their app databases to production. Wrote several scripts in Go to automate MySQL database failovers while maintaining master-slave replication topologies and keeping Zookeeper nodes consistent with changes.
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SkyRecruitment

April 2022 - September 2023
Junior Software Engineer
Designed and implemented a robust password encryption and browser cookie storage system in Ruby on Rails. Leveraged the Yahoo finance API to develop the dividend.com equity screener

Skills

React
Next.js
Typescript
Node.js
Electron
Deno
RustLang
GraphQL
Postgres
MongoDB
Redis
TailwindCSS
ChakraUI
Css
Sass
Docker
Kubernetes
Stripe
Paypal
Google Cloud
Jest
Playwright
Case Studies

Check out my latest work

I've worked on a variety of projects, from simple websites to complex web applications. Here are a few of my favorites.

Copark A/S CRM

With the release of the OpenAI GPT Store, I decided to build a SaaS which allows users to collect email addresses from their GPT users. This is a great way to build an audience and monetize your GPT API usage.

Next.js
Node.js
Typescript
PostgreSQL
Prisma
TailwindCSS
Stripe

Growth Hawaii

Growth Hawaii, an up and coming startup advertising agency specializing in digital marketing and creative services, sought to streamline their internal operations and enhance client interactions through a custom Point of Sale (POS) system.

Next.js
Typescript
PostgreSQL
Prisma
TailwindCSS
Stripe
Shadcn UI
Magic UI
War House Gyms

War House Gyms

Developed a self checkout system for a fitness company. The system allows users to purchase gym memberships, personal training sessions, and gym merchandise. The system is built for multiple locations, integrated with Stripe Terminal for payment processing and Prisma for database management.

Next.js
Typescript
PostgreSQL
Prisma
TailwindCSS
Material UI
Stripe
Digital Ocean
Contact

Let's connect!

You can find me on social media or email me,
cristovalamartinez@gmail.com