# Senior Frontend Developer

[Joom Group](https://gurify.com/jobs?q=Joom%20Group) · Lisbon, Portugal · Posted 5 weeks ago

Contract

Senior

[Frontend](https://gurify.com/jobs/frontend)

[Apply on the original posting → (opens in a new tab)](https://joom-group.breezy.hr/p/eeb628e20bcb-senior-frontend-developer)

## Job description

Senior Frontend Developer
Company: Joom
Location: Lisbon, PT
Type: FULL_TIME

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 famil
- AI-first approach: licenses and access to a wide range of AI tools

- 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

Before applying for the above position please review our Candidate Privacy Notice here. By responding to the vacancy, you acknowledge that you have read our Privacy notice.

**Live in Joom Group’s hiring system.** Read from the company's own applicant tracking system, not reposted from a job board — so it's a real, open requisition rather than an ad that outlived the role.

We remove it as soon as it disappears at source.

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