Senior Frontend Developer

Joom; Lisboa; Presencial; EUR 40 000 - 70 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Health insurance

Performance-based bonuses

Flexible hours

Paid annual leave

Relocation support

Professional training

Resumo da oferta

Joom in Lisbon is looking for a Senior Frontend Developer to enhance their innovative B2B marketplace. The role demands deep expertise in React.js and allows for contributions to AI development.

Benefits include health insurance, paid sick leave, flexible work hours, and relocation support. Join a diverse team working across Portugal, Brazil, Latvia, and China.

Qualificações

• Experience in developing large applications using React.js.
• Good knowledge of native JavaScript and OOP experience.
• Understanding of browser event models and rendering.

Responsabilidades

• Develop new features for existing applications.
• Support and maintain current functionalities.
• Refactor code to improve performance.

Conhecimentos

React.js

JavaScript

OOP

Network Protocols

Effector

Redux

Next.js

Express

TypeScript

Docker

Ferramentas

CSS-modules

PostCSS

Sass

Webpack

Cursor

Claude

Descrição da oferta de emprego

JoomPro is the first and only end-to-end cross-border B2B marketplace. It serves small, medium, and large businesses, handling orders of any size from start to finish. Today, JoomPro operates in Brazil and Mexico, with plans to expand into other markets.

JoomPro is one of the key businesses of Joom, an international tech-centric group of e-commerce companies founded in 2016 in Latvia. Joom Group also includes other businesses: Joom, a global cross-border marketplace; JoomPulse, an AI analytics tool for Mercado Livre sellers; and Onfy, a pharmaceutical marketplace in Germany. Joom Group has offices in Latvia, China, Portugal, Germany, and Brazil, with its headquarters in Lisbon, Portugal. We work as one international team, sharing knowledge and collaborating across countries, businesses and products.

We continue to grow and now we are looking for a Senior Frontend Developer with deep frontend expertise and interest in AI development and full-stack growth.

Tech stack: React.js, TypeScript, CSS-modules + many other tools on different projects (PostCSS, Sass, Effector, Next.js, Eslint, Stylelint, Express, Webpack, Cursor, Claude etc.)

Responsibilities

• New feature development
• Current functionality support
• Refactoring

Requirements

• Experience in developing large applications using React.js
• Good knowledge of native JavaScript and OOP experience
• Browser understanding: how event models work, browser rendering, animation features
• Knowledge of basic programming patterns, basic algorithms and the ability to assess their complexity
• Knowledge of network protocols

Preferred

• Experience with Effector, Redux, react-query
• Experience with Next.js, Express
• Experience with TypeScript
• Experience with AI tools: Cursor, Claude Code, Codex
• Nginx configuration and Docker experience
• Multilingual application development experience

We offer

• Compensation package: base salary and performance-based bonuses
• Office-first: flexible hours with a possibility to work remotely 52 days per year, and 22 days of paid annual leave
• Care & Wellbeing: health insurance (including dental care) for employees and their children, daily meal allowance, and 100% paid sick leave
• Relocation Support: full assistance for a smooth relocation for the employees and their family
• Team & Growth: collaboration with colleagues across Portugal, Brazil, Latvia and China, with opportunities for promotions, professional trainings, and English courses
• Community & Engagement: annual team building activities, knowledge-sharing workshops, and a strong sense of team work