Senior iOS Developer

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 continue to evolve our app, making it increasingly advanced and engaging for users. We are looking for a Senior iOS Developer to join the Joom Marketplace team – someone who will not only write code and design architecture, but also actively participate in discussions about product design and development. All developers are organized into domain-focused teams and work closely with product managers, designers, QA engineers, and analysts.

Tech stack

• All new code is written in modern Swift (property wrappers, function builders, etc.)
• Use RxSwift across all layers and follow the MVVM approach for the UI
• We support a lot of UI components, which are covered with snapshot-tests
• Moving toward a Backend Driven UI approach
• We use Needle for DI

Responsibilities

• Develop the iOS project architecture and design APIs for interaction with the backend part
• Improve the checkout and payment flow (new payment methods, delivery options, etc.)
• Develop features related to the post-purchase user experience in Joom (order details page, package tracking, refunds and returns process, AI support)
• Support product initiatives (implementing user-visible changes), participate in feature discussions and experiment launches
• Work on improving user retention
• Maintain and expand the automated test base

Requirements

• Strong proficiency in Swift and solid understanding of UIKit principles
• Experience developing client–server applications
• Experience with any reactive framework
• Experience working with dependency management and modularization
• A strong plus would be experience using AI tools (such as Cursor, Claude Code, or similar) with the ability to analyze what worked, what didn’t, and why

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
• 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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