FRONTEND DEVELOPER (HYBRID)

iTRTech Group; Lisboa; Hybrid; EUR 30,000 - 33,000; Full time

Benefits offered by this job

Hybrid work

Job summary

iTRTech Group is hiring a senior Frontend Developer for a hybrid role in Maia, Portugal. You will develop, maintain, and optimize high-traffic web applications, focusing on performance, accessibility, and modern web practices.

The role requires 5+ years, strong HTML/CSS/JS, SSR/CSR, Core Web Vitals, WCAG, Git, automated testing, and proficient use of AI tools. English and Portuguese must be at B2+ level; hybrid work involves 2 days in the Maia office.

Qualifications

• 5+ years of experience developing and maintaining production web frontends.
• Proficient in HTML, CSS, JavaScript, HTTP, and browser fundamentals.
• Strong SSR and CSR understanding.
• Experience optimizing performance for high-traffic sites (Core Web Vitals, Lighthouse).
• Knowledge of WCAG accessibility standards.
• Experience with Git, code reviews, and automated testing.
• Mature use of AI development tools to review/validate AI-generated code.
• English and Portuguese at B2+ level.

Responsibilities

• Develop, maintain, and improve production frontend applications.
• Build responsive, accessible, high-performance user interfaces.
• Optimize website performance using Core Web Vitals and Lighthouse.
• Apply SSR and CSR principles in projects.
• Participate in code reviews, automated testing, and version control processes.
• Use AI-assisted development tools responsibly, reviewing code.
• Collaborate with teams to maintain frontend quality and reliability.

Skills

HTML

CSS

JavaScript

HTTP

Browser Fundamentals

SSR

CSR

Core Web Vitals

Lighthouse

WCAG

Git

Automated Testing

AI-Assisted Development

React

TypeScript

Headless Architecture

E-commerce

SFCC / B2C Commerce / Demandware

SFRA

ISML

SCAPI

Storefront Next

PWA Kit

Composable Storefront

React Native

English B2+

Portuguese B2+

Tools

React

TypeScript

Job description

FRONTEND DEVELOPER (HYBRID MAIA – PORTUGAL)

Portuguese company hires for hybrid position.

Location: Maia, Portugal

Only candidates already based in Portugal will be considered

Work Model: Hybrid – 2 days per week in the office

Language Requirements: English B2+ and Portuguese B2+

Seniority: Senior (5+ years)

Industry: Food & Staples Retailing

Rate Between €2700 - 3000 RV or unipessoal (gross value)

About The Opportunity

We are looking for an experienced Frontend Developer to develop, maintain, and optimize high-traffic web applications.

The professional will focus on frontend performance, accessibility, modern web development practices, and code quality, contributing to scalable and reliable digital experiences.

Responsibilities

• Develop, maintain, and improve production-ready web frontend applications.
• Build responsive, accessible, and high-performance user interfaces.
• Optimize website performance using Core Web Vitals, Lighthouse, and related tools.
• Apply Server-Side Rendering (SSR) and Client-Side Rendering (CSR) principles.
• Participate in code reviews, automated testing, and version control processes.
• Use AI-assisted development tools responsibly, reviewing and validating generated code.
• Collaborate with development teams to maintain frontend quality and reliability.

Requirements

• Minimum 5 years of experience developing and maintaining production web frontends.
• Strong proficiency in HTML, CSS, JavaScript, HTTP, and browser fundamentals.
• Solid understanding of Server-Side Rendering (SSR) and Client-Side Rendering (CSR).
• Hands-on experience optimizing performance in high-traffic websites, including Core Web Vitals and Lighthouse.
• Practical knowledge of web accessibility standards, particularly WCAG.
• Experience with Git, code reviews, and automated testing.
• Mature use of AI development tools, with the ability to critically evaluate and validate AI-generated code.
• English B2+ and Portuguese B2+.

Nice to Have

• Experience with React and TypeScript.
• Participation in migrations to Headless Architecture.
• Experience in large-scale E-commerce or online retail platforms.
• Production experience with Salesforce Commerce Cloud (SFCC / B2C Commerce / Demandware).
• Knowledge of SFRA, including Cartridge Path, Overlay, ISML, Controllers, Models, and SCAPI.
• Experience with Storefront Next, PWA Kit, or Composable Storefront.
• Knowledge of React Native.

Ideal Candidate Profile

A Senior Frontend Developer with strong expertise in modern web technologies, frontend performance, accessibility, and production application maintenance. The ideal candidate combines solid JavaScript fundamentals with experience in high-traffic environments, automated testing, and responsible AI-assisted development. Experience in E-commerce, React, TypeScript, or Salesforce Commerce Cloud is highly valued.

5 Questions for Candidates

• How many years of professional experience do you have developing and maintaining production web frontend applications?
• What is your experience with HTML, CSS, JavaScript, SSR, CSR, and browser performance optimization?
• Have you worked with Core Web Vitals, Lighthouse, WCAG accessibility standards, and automated testing?
• Do you have experience with React, TypeScript, Headless Architecture, or Salesforce Commerce Cloud (SFCC)?
• Are you proficient in English and Portuguese at B2+ level, available to work in Maia twice a week, and aligned with the proposed rate of €2,700–€3,000?

Keywords

Frontend Developer, Frontend Engineer, JavaScript, HTML, CSS, HTTP, Browser Fundamentals, Server-Side Rendering, SSR, Client-Side Rendering, CSR, Web Performance, Core Web Vitals, Lighthouse, Web Accessibility, WCAG, Git, Code Review, Automated Testing, AI-Assisted Development, React, TypeScript, Headless Architecture, E-commerce, Salesforce Commerce Cloud, SFCC, B2C Commerce, Demandware, SFRA, ISML, SCAPI, Storefront Next, PWA Kit, Composable Storefront, React Native

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