Hi, I'm

Germán Sandoval

Full-Stack Software Engineer

I build scalable web applications with clean code and thoughtful UX.

About Me

I'm a passionate software engineer with experience building modern web applications. I love clean architecture, great developer experience, and shipping products people enjoy.

When I'm not coding, you'll find me exploring learning languages with Duolingo, watching series, reading books, taking photos or experimenting with side projects.

Location

Based in Merida, MX

Status

Open to new opportunities and relocation

8+Years of experience

10+Projects delivered

Languages

SpanishNative

EnglishFluent

Experience

Senior Software Engineer

PayMitto

Aug 2024 – PresentMerida, MX (Remote)

Contributed to a platform processing more than 50K daily payment transactions through integrations with 10+ banking and payment partners.
Selected and defined the frontend technology stack, architecture patterns, and engineering standards for a greenfield international payments SDK supporting 15+ currencies and 8+ payment methods.
Designed and implemented the communication contract between host applications and the SDK using window-based event messaging, enabling seamless integration across multiple banking partners and products.
Established frontend engineering standards, including state management, data-fetching patterns, loading strategies, and application architecture guidelines to improve scalability and maintainability.
Led architecture and implementation efforts across three concurrent product initiatives, coordinating work between frontend, backend, and product stakeholders while mentoring engineers.

Senior Software Engineer

Wizeline

Sep 2022 – Aug 2024Guadalajara, MX (Remote)

Projects

BoatTrader

Contributed to a 15% increase in organic traffic by improving Core Web Vitals and reducing page load times.

Synchrony

Led frontend performance initiatives, refactoring state management, and optimizing GraphQL data-fetching strategies.

Independent Software Contractor

Freelance

Aug 2021 – Sep 2022Guadalajara, MX (Remote)

Projects

TonoHealth

Implemented video consultations, real-time messaging, authentication flows, and Stripe payment processing.

General Motors

Implemented message-driven workflows and asynchronous communication patterns to process vehicle usage events and trigger personalized customer engagement campaigns.

Senior Software Engineer

Luxoft

Feb 2021 – Aug 2021Guadalajara, MX (Remote)

Led a team of 5 engineers delivering developer platform initiatives and internal tooling improvements for Expedia Group.
Integrated Spotify Backstage into Expedia's engineering ecosystem, improving service discovery and developer experience.
Conducted technical interviews and contributed to frontend engineering hiring decisions.

Full Stack Engineer

Clip

Jul 2020 – Feb 2021Guadalajara, MX (Remote)

Designed and implemented event-driven payment-processing microservices on AWS Lambda using RabbitMQ messaging patterns, supporting 200K+ daily transactions across a customer base exceeding 500K users.
Collaborated with cross-functional teams to improve reliability, observability, and operational scalability of payment infrastructure.
Contributed to backend architecture discussions and cloud-native service design initiatives.

Software Engineer

Luxoft

Aug 2019 – Jun 2020Guadalajara, MX (On-site)

Led the design and adoption of a shared React component library containing 50+ reusable components used across multiple Expedia Group teams.
Reduced frontend development effort by approximately 40% through standardization and component reuse.

Application Developer

IBM

May 2017 – Feb 2019Guadalajara, MX (On-site)

Migrated 80+ legacy Handlebars views to React applications, reducing Time to Interactive by 55%.
Reduced database query execution times from 3 minutes to 30 seconds through indexing and query optimization.

Skills

Frontend

ReactNext.jsTypeScriptTailwindFramer MotionReduxReact QueryHTML / CSSJestCypress

Backend

Node.jsExpressPythonREST APIsGraphQLtRPCWebSockets

Databases & Storage

PostgreSQLMySQLMongoDBSupabasePrisma

DevOps & Tools

GitDockerGitHub ActionsAWSGCPVercel

Projects

me

Featured

My personal portfolio and blog. Built with Next.js App Router, next-intl for multilingual support (EN/ES), Tailwind CSS v4, and framer-motion animations. Features dark mode, MDX blog, dynamic OG images, and RSS feed.

Next.jsTypeScriptTailwind CSSnext-intlMDX

View Code

Contact

Have a project in mind or just want to chat? I'd love to hear from you.

GitHub LinkedIn

You can also reach me at german.sandoval.i@gmail.com

About Me

I'm a passionate software engineer with experience building modern web applications. I love clean architecture, great developer experience, and shipping products people enjoy.

When I'm not coding, you'll find me exploring learning languages with Duolingo, watching series, reading books, taking photos or experimenting with side projects.

Location

Based in Merida, MX

Status

Open to new opportunities and relocation

8+Years of experience

10+Projects delivered

Languages

SpanishNative

EnglishFluent

Experience

Senior Software Engineer

PayMitto

Aug 2024 – PresentMerida, MX (Remote)

Contributed to a platform processing more than 50K daily payment transactions through integrations with 10+ banking and payment partners.
Selected and defined the frontend technology stack, architecture patterns, and engineering standards for a greenfield international payments SDK supporting 15+ currencies and 8+ payment methods.
Designed and implemented the communication contract between host applications and the SDK using window-based event messaging, enabling seamless integration across multiple banking partners and products.
Established frontend engineering standards, including state management, data-fetching patterns, loading strategies, and application architecture guidelines to improve scalability and maintainability.
Led architecture and implementation efforts across three concurrent product initiatives, coordinating work between frontend, backend, and product stakeholders while mentoring engineers.

Senior Software Engineer

Wizeline

Sep 2022 – Aug 2024Guadalajara, MX (Remote)

Projects

BoatTrader

Contributed to a 15% increase in organic traffic by improving Core Web Vitals and reducing page load times.

Synchrony

Led frontend performance initiatives, refactoring state management, and optimizing GraphQL data-fetching strategies.

Independent Software Contractor

Freelance

Aug 2021 – Sep 2022Guadalajara, MX (Remote)

Projects

TonoHealth

Implemented video consultations, real-time messaging, authentication flows, and Stripe payment processing.

General Motors

Implemented message-driven workflows and asynchronous communication patterns to process vehicle usage events and trigger personalized customer engagement campaigns.

Senior Software Engineer

Luxoft

Feb 2021 – Aug 2021Guadalajara, MX (Remote)

Led a team of 5 engineers delivering developer platform initiatives and internal tooling improvements for Expedia Group.
Integrated Spotify Backstage into Expedia's engineering ecosystem, improving service discovery and developer experience.
Conducted technical interviews and contributed to frontend engineering hiring decisions.

Full Stack Engineer

Clip

Jul 2020 – Feb 2021Guadalajara, MX (Remote)

Designed and implemented event-driven payment-processing microservices on AWS Lambda using RabbitMQ messaging patterns, supporting 200K+ daily transactions across a customer base exceeding 500K users.
Collaborated with cross-functional teams to improve reliability, observability, and operational scalability of payment infrastructure.
Contributed to backend architecture discussions and cloud-native service design initiatives.

Software Engineer

Luxoft

Aug 2019 – Jun 2020Guadalajara, MX (On-site)

Led the design and adoption of a shared React component library containing 50+ reusable components used across multiple Expedia Group teams.
Reduced frontend development effort by approximately 40% through standardization and component reuse.

Application Developer

IBM

May 2017 – Feb 2019Guadalajara, MX (On-site)

Migrated 80+ legacy Handlebars views to React applications, reducing Time to Interactive by 55%.
Reduced database query execution times from 3 minutes to 30 seconds through indexing and query optimization.