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I'm Miquel Grau Casellas, a Lead Frontend Developer focused on scalable architecture and high-quality UI. With 8+ years building modern web apps, I excel in Angular (up to v20), TypeScript, RxJS, NgRx, and modular architecture. I translate design into robust, testable code and help teams move from discovery to delivery. I've led end-to-end product work, mentored engineers, and collaborated closely with product and UX/UI to deliver exceptional user experiences. Notable achievements include delivering 99% unit test coverage in a regulated pharma environment, modernizing legacy AngularJS/jQuery codebases to Angular 2+, and steering both internal and customer-facing products (e.g., My Cool Hat) from discovery to production.…I'm Miquel Grau Casellas, a Lead Frontend Developer focused on scalable architecture and high-quality UI. With 8+ years building modern web apps, I excel in Angular (up to v20), TypeScript, RxJS, NgRx, and modular architecture. I translate design into robust, testable code and help teams move from discovery to delivery. I've led end-to-end product work, mentored engineers, and collaborated closely with product and UX/UI to deliver exceptional user experiences. Notable achievements include delivering 99% unit test coverage in a regulated pharma environment, modernizing legacy AngularJS/jQuery codebases to Angular 2+, and steering both internal and customer-facing products (e.g., My Cool Hat) from discovery to production.

Miquel Grau Casellas

Front-End Developer, Web Developer, Product Designer, +2

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I'm Miquel Grau Casellas, a Lead Frontend Developer focused on scalable architecture and high-quality UI. With 8+ years building modern web apps, I excel in Angular (up to v20), TypeScript, RxJS, NgRx, and modular architecture. I translate design into robust, testable code and help teams move from discovery to delivery. I've led end-to-end product work, mentored engineers, and collaborated closely with product and UX/UI to deliver exceptional user experiences. Notable achievements include delivering 99% unit test coverage in a regulated pharma environment, modernizing legacy AngularJS/jQuery codebases to Angular 2+, and steering both internal and customer-facing products (e.g., My Cool Hat) from discovery to production.…I'm Miquel Grau Casellas, a Lead Frontend Developer focused on scalable architecture and high-quality UI. With 8+ years building modern web apps, I excel in Angular (up to v20), TypeScript, RxJS, NgRx, and modular architecture. I translate design into robust, testable code and help teams move from discovery to delivery. I've led end-to-end product work, mentored engineers, and collaborated closely with product and UX/UI to deliver exceptional user experiences. Notable achievements include delivering 99% unit test coverage in a regulated pharma environment, modernizing legacy AngularJS/jQuery codebases to Angular 2+, and steering both internal and customer-facing products (e.g., My Cool Hat) from discovery to production.

Available to hire

I’m Miquel Grau Casellas, a Lead Frontend Developer focused on scalable architecture and high-quality UI. With 8+ years building modern web apps, I excel in Angular (up to v20), TypeScript, RxJS, NgRx, and modular architecture. I translate design into robust, testable code and help teams move from discovery to delivery.

I’ve led end-to-end product work, mentored engineers, and collaborated closely with product and UX/UI to deliver exceptional user experiences. Notable achievements include delivering 99% unit test coverage in a regulated pharma environment, modernizing legacy AngularJS/jQuery codebases to Angular 2+, and steering both internal and customer-facing products (e.g., My Cool Hat) from discovery to production.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Catalan; Valencian

Fluent

Spanish; Castilian

Fluent

English

Fluent

French

Beginner

Work Experience

Frontend Lead Developer at Multiplica

January 1, 2024 - Present

Built a fully modular front-end architecture across 40+ feature modules with shared internal libraries; decoupled domain models from back-end contracts via an adapter/mapping layer; co-led delivery and mentored a small team; partnered with back-end engineers and QA to ensure secure coding practices and audit readiness; achieved 99% unit test coverage in a regulated pharma environment.

Frontend Lead Developer at Tekman Education

March 1, 2023 - November 1, 2023

Led 2 junior developers, introduced weekly peer-programming sessions; refactored state and data flows into a single source of truth (NgRx) to keep UI state consistent across navigation; applied SOLID principles and shipped features using Angular, NgRx, and Tailwind.

Frontend Lead Developer at Paymefy

July 1, 2021 - January 1, 2023

Designed and built Paymefy’s core applications end-to-end (internal operations tool and customer-facing app); led product discovery with stakeholders and influenced UX/UI for usability and clarity; established scalable architecture aligned with modern Angular patterns; coordinated external contributors and maintained quality through reviews and delivery standards; shipped stable weekly releases.

Frontend Developer at Capitole Consulting

June 1, 2019 - May 1, 2021

Delivered for two clients, building management and tracking interfaces within multi-project Angular ecosystems; implemented WebSocket-based real-time features (Socket.IO) and delivered dashboards and geo-tracking with custom Google Maps integrations; mentored a junior developer and improved code organization and maintainability.

Frontend Developer at Bee the Data

June 1, 2017 - June 1, 2019

Migrated 3 legacy AngularJS/jQuery projects to Angular 2+ and initiated 2 new Angular applications; partnered with leadership to translate client requirements into realistic technical solutions; built and maintained a social network product (Crumbit) and delivered multiple post-launch iterations; contributed to UI/UX awareness through hands-on design work alongside development.