Application Security (AppSec) Engineer

Company: Joom
Location: Lisbon, Portugal
Type: Remote
Posted: Aug 26, 2026
Views: 3

Joom Group is an international tech-centric group of e-commerce companies founded in 2016 in Latvia. We are here to transform the largest industry in the world, global trade, making it more transparent, efficient, and technology-driven.

Today, Joom Group brings together the following businesses: Joom, a platform for shopping from all over the world; JoomPro, the first end-to-end cross-border B2B marketplace, with successful operations in Brazil and plans to expand to other markets; JoomPulse, data platform that provides analytics and recommendations for marketplace sellers; and Onfy, a pharmaceutical marketplace in Germany. Joom Group’s offices are located in China, Brazil, Portugal, Latvia, and Germany, with headquarters in Lisbon, Portugal. We work as one international team, sharing knowledge and collaborating across countries, businesses, and products.

As we continue to grow and introduce new products and services, we become increasingly susceptible to security threats. We are currently seeking an Application Security Engineer for our infrastructure team to stay informed about current threats and ensure the security of our development and applications.

This role offers the opportunity to develop the application security direction from the ground up and achieve international certification.

We prioritize innovation over bureaucracy and legacy code and are always open to fresh ideas.

Responsibilities

  • Implement SSDLC with the development team
  • Analyze the security of the company's products
  • Assist teams in addressing vulnerabilities
  • Stay informed about current threats and develop code protections

Requirements

  • 3+ years of experience in web/mobile application security
  • Experience in securing mobile and web applications
  • Experience in building secure development processes (SSDLC)
  • Experience with white box testing
  • Knowledge of *NIX systems and basic network protocols

Preferred

  • Experience in bug bounty programs
  • Relevant information security certifications (e.g., OSCP, CompTIA Security+)
  • CVE authorship
  • Proficiency in Go, Python, or Java

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
  • 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

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    About the Company

    Name: Joom
    Location: Berlin, DE

    Joom

    A global cross-border marketplace where millions can find anything they want at fair prices.

    JMS

    A unique solution for local marketplaces that want to expand their assortment with international inventory. By simply integrating JMS via API or white-label solution, marketplaces get instant access to millions of products from all over the world.

    JoomPro

    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.

    JoomPulse

    An AI analytics tool for Mercado Livre sellers, providing insights into the most profitable products and fastest-growing categories — helping sellers boost their profits with data-driven decisions.

    Onfy

    A pharmaceutical marketplace that helps save time and money when sourcing and buying medicines and medical supplies. Available to buyers in Germany.

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