Joom is a global cross-border marketplace where millions can find anything they want at fair prices. Joom helps consumers to make shopping easy and entertaining and provides access to interesting and unique goods from around the world.

Joom is one of the key businesses of Joom Group, an international group of tech-centric group of e-commerce companies founded in 2016 in Latvia. Joom also includes other businesses: JoomPro, the first and only end-to-end cross-border B2B marketplace; JoomPulse, an AI analytics tool for Mercado Livre sellers; and Onfy, a pharmaceutical marketplace in Germany. Joom Group has offices in Latvia, China, 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 are currently looking for Senior/Middle+ Backend Developers to join our teams:

• 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. Tech stack: Go, MongoDB, Redis, Kafka, Amazon AWS, Docker, Kubernetes, Elasticsearch
• The Development Infrastructure team is responsible for the uninterrupted operation of internal services, the fault tolerance of components, the evolution of the codebase architecture, as well as creating and maintaining tools for developers. Tech stack: Go, Bazel, Jenkins, Kubernetes, Helm, KCL, Terraform, MongoDB, Postgres
• The Antifraud Infrastructure team is responsible for ensuring platform security, including infrastructure protection, bot management, user device authorization, personal data storage, and preventing data leaks. Tech stack: Go, Kotlin, MongoDB, Cassandra, Redis, Kafka, Spark (Scala, SQL), Amazon AWS, Docker, Kubernetes, ML
• The Client Backend team is responsible for all API requests coming from our mobile apps and Joom's web client. Tech stack: Go, MongoDB, Redis, Casandra, Kafka, sometimes Spark (Scala, SQL), Docker, Kubernetes, Grafana, Prometheus

Responsibilities

• Come up with architecture
• Program in Go (Go is not a must for us; it is more important for a successful candidate to have solid algorithm skills, fundamental technical knowledge, and great coding skills in general)
• Provide fault tolerance for coded services in an AWS environment
• Be prepared for a constant increase of processed and stored data loads and volumes
• Participate in new feature and product development discussions

Requirements

• Confident knowledge of any of the programming languages: Go/Java/Kotlin/C++/Python/Scala
• Complex project development experience
• Excellent algorithmic training
• Experience in development for Linux / Unix

Preferred

• Experience with highload
• Experience with MongoDB
• Experience with Kubernetes

We offer

• Compensation package: base salary and performance-based bonuses
• Office-first: flexible hours with a possibility to work remotely 52 days per year
• 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
• 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 & Portuguese courses
• Community & Engagement: annual team building activities, knowledge-sharing workshops, and a strong sense of team work

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