Senior Mobile Software Engineer (iOS) – Consumer Experience

Allegro.eu S.A.; Poznań; Hybrid; PLN 210,000 - 289,000; Full time

Benefits offered by this job

MacBook Pro or Windows laptop

Flexible hybrid schedule

English language courses

Training budget

Volunteer day

Social events

Job summary

Allegro is seeking a Senior Mobile Software Engineer (iOS) to shape a new shopping experience and enhance Allegro’s mobile apps. You will collaborate with product, design, and engineering teams to deliver high-performance iOS features and ensure code quality through reviews and testing.

You will work with Swift, SwiftUI, and modern iOS toolchains, while exploring new technologies and contributing to a large, fast-paced e-commerce platform. Hybrid work and generous benefits accompany this role.

Qualifications

• Fluency in Swift and the iOS SDK.
• Solid knowledge of SwiftUI, Combine, and Swift Concurrency.
• Ability to write unit tests (XCTest and Swift Testing), snapshot tests (SnapshotTesting), and UI tests (XCUITest).
• Collaborate with backend engineers and product teams.
• Practical experience with modular architecture.
• Experience in developing and scaling large codebases.
• Knowledge of Apple Liquid Glass design language and WCAG accessibility standards.
• Proficiency with AI-assisted tools in daily development.

Responsibilities

• Design, develop, test, and deploy features for the Allegro iOS application.
• Collaborate with product, design, and cross-functional teams to implement mobile solutions.
• Participate in code reviews and maintain high code quality across iOS.
• Be part of Allegro’s mobile community and contribute to knowledge sharing.
• Identify and resolve performance issues and memory leaks in the iOS app.
• Stay up to date with iOS technologies and trends.

Skills

Swift

iOS SDK

SwiftUI

Combine

Swift Concurrency

Unit tests (XCTest)

SnapshotTesting

UI tests (XCUITest)

Modular architecture

Large codebases

WCAG accessibility

AI-assisted tools

Job description

Senior Mobile Software Engineer (iOS) - Consumer Experience

Location: Poznań, PL, 61-569 Kraków, PL, 31-503

Team: Technology

Contract Type: Employee

Main Responsibilities:

As a Senior Mobile Software Engineer, you will be a key contributor to shaping a new shopping experience for our customers and improvements for our mobile applications. You will work closely with product managers, designers, and other engineers to translate user needs into robust, high-performance mobile experiences. This role is ideal for someone with solid experience in mobile development, a strong understanding of software engineering principles, and a desire to grow their expertise in a fast-paced e-commerce environment. We warmly welcome engineers who enjoy staying versatile and occasionally exploring tech beyond their core iOS focus.

Important things for you:

Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work.

The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost):

PLN 18 850 - 25 900

Annual bonus based on your annual performance and company results.

Our team is based in Poznań and Kraków

What You’ll Do:

• Design, develop, test, and deploy features for the Allegro iOS application, ensuring high quality, performance, and responsiveness.
• Collaborate with product, design, and cross-functional engineering teams to define and implement innovative mobile solutions.
• Participate in code reviews, contribute to architectural discussions, and maintain high code quality standards across the iOS platform.
• Be a part of Allegro’s mobile community of over 100 developers. We actively share knowledge through daily code reviews, internal tech talks, and dedicated time for personal skill development.
• Identify and resolve performance bottlenecks, memory leaks, and scalability issues within the iOS app.
• Stay up to date with the latest iOS technologies (Swift, SwiftUI, Apple SDKs) and mobile industry trends.

We are looking for someone who has:

• Fluency in Swift and the iOS SDK.
• Solid knowledge of SwiftUI, Combine, and Swift Concurrency.
• Ability to write unit tests (XCTest and Swift Testing), snapshot tests (SnapshotTesting), and UI tests (XCUITest).
• Collaboration with backend engineers and product teams.
• Practical experience working with modular architecture.
• Experience in developing and scaling large codebases.
• Knowledge of Apple Liquid Glass design language and WCAG accessibility standards.
• Proficiency in using AI-assisted tools (GitHub Copilot, OpenCode, or other agentic coding tools) in daily software development.

Bonus points if you have:

• Experience with large-scale, high-traffic mobile applications.
• Experience with A/B testing frameworks.
• Previous hands-on experience with the Android ecosystem or backend development - or a strong willingness to expand your skillset into these areas.
• Openness to working across mobile platforms or diving into backend systems as our cross-functional teams evolve.
• Contributions to open-source projects or a strong GitHub profile.
• Experience working in an Agile/Scrum environment.

What’s in it for you:

Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms).

A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don’t like Macs) and all the necessary accessories.

A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers).

English classes that we pay for related to the specific nature of your job.

A training budget, inter-team tourism (see more here ), hackathons, and an internal learning platform where you will find multiple trainings.

An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal.

Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy.

And that’s just the beginning! You can read more about the benefits here .

#goodtobehere means that:

You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA.

You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create.

You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job.

You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support).

You will create solutions that will be used (and loved) by your friends, family and millions of our customers.

You will meet the Allegro Scale, which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning.

You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about!