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Hands-on engineering leader and senior frontend engineer with deep expertise in React and TypeScript, design systems, and cross-stack delivery. I’ve built and scaled production-grade platforms, shipped performance-focused UI components, and led design system adoption across teams. I also combine engineering management with security and code-quality best practices: I’ve led migrations, improved reliability and metrics (e.g., billing/payment error reduction and experimentation growth), and now I’m deliberately returning full-time to build while continuing to use AI tooling and production engineering practices.…Hands-on engineering leader and senior frontend engineer with deep expertise in React and TypeScript, design systems, and cross-stack delivery. I’ve built and scaled production-grade platforms, shipped performance-focused UI components, and led design system adoption across teams. I also combine engineering management with security and code-quality best practices: I’ve led migrations, improved reliability and metrics (e.g., billing/payment error reduction and experimentation growth), and now I’m deliberately returning full-time to build while continuing to use AI tooling and production engineering practices.

Antonio Garcia Jimenez

Front-End Developer, Software Engineer, Full Stack Developer

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Hands-on engineering leader and senior frontend engineer with deep expertise in React and TypeScript, design systems, and cross-stack delivery. I’ve built and scaled production-grade platforms, shipped performance-focused UI components, and led design system adoption across teams. I also combine engineering management with security and code-quality best practices: I’ve led migrations, improved reliability and metrics (e.g., billing/payment error reduction and experimentation growth), and now I’m deliberately returning full-time to build while continuing to use AI tooling and production engineering practices.…Hands-on engineering leader and senior frontend engineer with deep expertise in React and TypeScript, design systems, and cross-stack delivery. I’ve built and scaled production-grade platforms, shipped performance-focused UI components, and led design system adoption across teams. I also combine engineering management with security and code-quality best practices: I’ve led migrations, improved reliability and metrics (e.g., billing/payment error reduction and experimentation growth), and now I’m deliberately returning full-time to build while continuing to use AI tooling and production engineering practices.

Available to hire

Hands-on engineering leader and senior frontend engineer with deep expertise in React and TypeScript, design systems, and cross-stack delivery. I’ve built and scaled production-grade platforms, shipped performance-focused UI components, and led design system adoption across teams.

I also combine engineering management with security and code-quality best practices: I’ve led migrations, improved reliability and metrics (e.g., billing/payment error reduction and experimentation growth), and now I’m deliberately returning full-time to build while continuing to use AI tooling and production engineering practices.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

Spanish; Castilian

Fluent

English

Fluent

French

Intermediate

Work Experience

Engineering Manager (hands-on) at Digis tore 24

July 1, 2025 - Present

Still ship code most weeks, with frontend work in Angular and TypeScript against a PHP/Symfony backend, while leading an 8-person cross-functional squad for a B2B e-commerce platform with ~40,000 weekly active vendors. Built production MCP servers solo in Python on Kubernetes, exposing internal APIs to AI agents with strict guardrails and full auditability. Shipped an agentic Next Best Action widget for vendors, A/B tested against a control group, and improved growth for users who saw the experiment while continuing iteration. Owned vendor retention OKR, lifting it from 45.5% to 50% through A/B-tested product experiments.

Engineering Manager (hands-on) at Digistore24

July 1, 2024 - Present

Led a cross-functional squad within a B2B e-commerce platform and managed engineering delivery while still shipping frontend and backend code. Built and operated production MCP servers in Python on Kubernetes, exposing internal APIs to AI agents with strict guardrails and full auditability. Shipped an agentic Next Best Action widget for vendors, A/B tested against a control group, and delivered measurable user growth during the experiment. Owned vendor retention KPI improvement through A/B tested product experiments, lifting retention from ~45.5% to ~50% by running production-grade iterations with ongoing measurement and continued rollout.

Engineering Manager at Sonar

June 1, 2022 - June 30, 2025

Led the Billing team (up to 12 engineers at peak), owning billing from backend services to customer-facing React screens, coaching performance toward an internal best-squad award in 2025. Migrated a legacy payments system to Stripe, lowering payment errors by 37%, and shipped the entitlement system with three new pricing tiers that underpin SonarCloud billing.

Senior Frontend Engineer at Sonar

April 1, 2020 - June 30, 2022

Built complex user interfaces for SonarCloud in React and TypeScript for a B2B code-quality platform with an open-source-focused culture. Led the design system effort across SonarCloud, developing performant and reusable React components adopted by frontend squads. Ran hiring for the senior frontend position as hiring manager, interviewing and assessing senior frontend candidates.

Senior Frontend Engineer at RIPS Technologies

February 1, 2019 - April 1, 2020

Owned critical frontend features in an application-security startup (static code analysis) using Angular and TypeScript under tight deadlines.

Full Stack Engineer at Future Connections

August 1, 2016 - January 31, 2019

Built full-stack applications with APIs in Django (Python) and contributed to the architecture of backend and mobile app systems.