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Senior Mobile Developer (iOS/Swift)

Location: Colombia, fully remote

.Monks Technology Services, part of Media.Monks and S4 Capital, is a global consulting firm mastering AI-powered transformations for the Fortune 100. We combine long-term strategic thinking, deep enterprise experience, and a human-centered approach to help clients transform business processes and dominate their industries.

About the Role

As a Senior Mobile Developer (iOS/Swift), you’ll design, build, and maintain high-quality iOS applications using Swift, collaborating with designers, product managers, and engineers to deliver reliable, performant mobile experiences that support product goals and elevate the end-user experience.

Responsibilities

• Develop, test, and maintain Swift-based iOS applications
• Collaborate with designers, product managers, and engineers to implement and refine features
• Ensure app performance, stability, and usability across iOS devices and OS versions
• Participate in code reviews and help uphold engineering best practices and code quality
• Debug, troubleshoot, and resolve technical issues throughout development and QA cycles
• Contribute to architectural discussions and technical decisions for scalable mobile solutions
• Write and maintain unit and UI tests (XCTest or similar) to ensure feature reliability
• Integrate mobile apps with APIs (REST and/or GraphQL) and support offline-first experiences
• Support App Store releases and CI/CD workflows for consistent delivery
• Stay current with the iOS ecosystem and introduce relevant improvements to the codebase
• Other duties as assigned

About You

Qualifications & Skills

• 5+ years of relevant mobile engineering experience, with strong iOS delivery ownership
• Strong proficiency in Swift and iOS development best practices
• Solid knowledge of iOS frameworks including UIKit, SwiftUI, and Core Data
• Experience with architecture patterns such as MVC and MVVM (Clean Architecture is a plus)
• Hands-on experience building offline-capable iOS applications
• API integration experience with REST and/or GraphQL
• Testing experience with XCTest (unit and UI testing)
• Performance profiling/debugging skills using tools such as Instruments
• Familiarity with App Store release processes and CI/CD workflows
• Good understanding of mobile security (secure storage, authentication, and common iOS security practices)
• Comfort with DevOps fundamentals related to version control, deployment pipelines, and release management
• Strong communication and collaboration skills in Agile environments; able to work effectively with technical and non-technical stakeholders
• Mentorship mindset, supporting and guiding junior engineers when needed

Monks Technology Services does not discriminate on the basis of race, sex, color, religion, age, national origin, marital status, disability, veteran status, genetic information, sexual orientation,

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About Monks 

Monks is the global, digital-first, data-driven, unitary operating brand of S4 Capital plc. With a legacy of innovation and specialized expertise, Monks combines an extraordinary range of global Marketing and Technology Services to redefine how brands interact with the world. Through Monks.Flow, its flagship AI ecosystem for marketing orchestration, Monks transforms marketing into a growth engine, collapsing timelines and connecting brands to culture in real time. By deploying bespoke intelligent agents across disciplines and delivering culturally relevant, high-impact creative and digital solutions, Monks solves key critical business challenges across the entire brand enterprise to help brands sustain long-term impact.

Monks was named a Contender in The Forrester Wave™: Global Marketing Services, ranks among Cannes Lions' Top 10 Creative Companies (2022-25) and remains the only partner featured in AdExchanger’s Programmatic Power Players list every year (2020-24). Named Adweek’s first AI Agency of the Year (2023) and The One Show’s inaugural AI Pioneer Organization, Monks was also awarded Business Intelligence Group’s 2025 Excellence in Artificial Intelligence Award in both the Organizational and AI Product categories. As a trusted partner to cutting-edge innovators in tech, Monks earned titles such as Optimizely Experimentation Partner of the Year (2025), runner-up for the Adobe Firefly Partner Award (2024), and Workato’s AI Visionary Customer Impact Award (2024). Additionally, Monks achieved a record-breaking number of FWAs and continues to hold the most of any partner.

We are an equal-opportunity employer committed to building a respectful and empowering work environment for all people to freely express themselves amongst colleagues who embrace diversity in all respects. Including fresh voices and unique points of view in all aspects of our business not only creates an environment where we can all grow and thrive but also increases our potential to produce work that better represents—and resonates with—the world around us.