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Senior software engineer, iOS

FDJ UNITED· London Area, United Kingdom· Est. ~£95k · UK market
Posted 17 Jun 2026 · Added 18 Jun 2026, 19:26Lead Software Engineer
iOS
FDJ UNITED4.0 (95)1,001 to 5,000 employeesnomatch

Vous connaissez FDJ, opérateur de jeux d'argent en France. Découvrez un Groupe en pleine transformation qui propose du divertissement, des paiements et services et des solutions B2B à l'international.

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At FDJ UNITED, we don't just follow the game, we reinvent it.

FDJ UNITED is one of Europe’s leading betting and gaming operators, with a vast portfolio of iconic brands and a reputation for technological excellence. With more than 5,000 employees and a presence in around fifteen regulated markets, the Group offers a diversified, responsible range of games, both under exclusive rights and open to competition. We set new standards, proving that entertainment and safety can go hand in hand. Here, you’ll work alongside a team of passionate individuals dedicated to delivering the best and safest entertaining experiences for our customers every day.

We’re looking for bold people who are eager to succeed and ready to level-up the game. If you thrive on innovation, embrace challenges, and want to make a real impact at all levels, FDJ UNITED is your playing field.

Join us in shaping the future of gaming. Are you ready to LEVEL-UP THE GAME?

As a senior software engineer, you are a core team member on whom the team relies to consistently deliver high quality solutions. You take ownership to help the team reach their goals, including actively sharing knowledge and providing feedback. You can identify and initiate activities to address improvement areas within the team. With a mature view on technical governance you have a long term perspective of the team's components and applications.

This position is for an exceptional Senior iOS Developer who is keen to work on Native Apps. You'll be working with great colleagues from diverse backgrounds who are passionate about what they do. This passion will ignite your creativity in a fast-paced yet fun, Agile environment where technology and problem solving are key.

What you will do

Design, implement, test and deploy high-quality iOS apps with a focus on performance and scalability, using the most appropriate techniques and design patterns

Work closely with a Product Owner, Engineer Team Lead and the rest of your team — confidently contributing to architectural discussions and proactively challenging and improving requirements

Develop in Swift using your expert knowledge of Xcode, applying good practices such as TDD and BDD with a shift-left mindset to catch defects early

Actively contribute to and improve best practices — from logging and performance testing to CI/CD pipeline maintenance

Conduct and receive code reviews constructively, helping to raise the bar across the team

Break down technical GAP documents and requirements into well-defined, deliverable work items

Take ownership of incident management and the writing, execution and analysis of performance tests

Represent the team effectively in stakeholder discussions, using domain concepts and language with confidence

Apply appropriate code analysis tools to continuously improve code quality and security

Your experience

Solid software engineering background with at least 6 years' experience of iOS app development

Expert knowledge of iOS SDK, Swift, SwiftUI, UIKit, XCTest and SwiftTesting

Proven ability to write high-quality, performant code independently, drawing on experience across different systems and architectures

Strong experience with multithreaded programming and network protocol design, including RESTful web services

Experienced in test automation, TDD, BDD and quality assurance best practices

Experienced in incident management and risk assessment

Understanding of secure development principles and impact analysis

Excellent written and verbal English with strong communication skills for both team and stakeholder engagement

Knowledge about MVVM, and dependency injection pattern

Knowledge in GIT

An advantage

Experience with Agile methodologies and a track record of suggesting process improvements

Knowledge of programming design patterns

Familiarity with Atlassian tools such as BitBucket and JIRA