iOS Developer

Job Type: Independent Contractor

Job Location: Remote, Brazil or Mexico (Working on Eastern Time)

About us:

ACTO is an Intelligent Field Excellence (IFE) platform built for life sciences that unifies human intelligence with empathetic AI to help Sales, Medical, Market Access, and Marketing teams improve customer engagement and brand performance. With ACTO, biopharma companies can ensure field professionals are always competent, confident, and credible in face-to-face HCP interactions, while providing senior leaders and frontline managers with the insight they need to drive continuous field force effectiveness. As a validated platform compliant with FDA 21 CFR Part 11 and SOC 2 Type II certified, ACTO is the trusted partner for intelligent field excellence in the life sciences industry.

Role Summary:

We’re looking for an experienced iOS Developer to join our fast-moving, cross-functional team focused on delivering high quality mobile experiences that scale. This is a contractor role supporting a mature codebase, with the opportunity to shape key features and optimize for performance and modularity.

You’ll work closely with Product, Sales, and Customer Success teams to build, maintain, and evolve our iOS offerings — all while staying agile and adaptable in a dynamic environment.

• Building, maintaining, and optimizing iOS applications using SwiftUI and UIKit.
• Participating in the architecture, design, and development of modular, scalable features.
• Taking ownership of the iOS development lifecycle — from ideation to deployment, testing, and delivery.
• Collaborating closely with Product Managers and other stakeholders to align on scope and prioritize features.
• Reacting proactively to changing requirements and scope — always keeping an eye on product and business value.
• Managing app releases and deployment through tools like Xcode Cloud.
• Ensuring high standards of code quality and maintainability by following SOLID principles and best practices.
• Working across departments to support product initiatives and coordinate with teams like CS and Sales when necessary.
• Maintaining clear, consistent communication with the Mobile Lead and taking full accountability for timelines and deliverables.

To be successful in this role, you’ll need:

• 5+ years of experience in iOS development, with a proven track record of delivering apps to the App Store. 
• Expertise in iOS Frameworks such as UIKit, Compositional Layout, Diffable Datasource, SwiftUI, Core Data, Swift Data, etc. 
• Proficiency in Swift (Objective C is a plus).
• Experience with Xcode Cloud and other CI/CD Pipelines. 
• Strong knowledge of core mobile principles, RESTful APIs, Accessibility, Streaming,  and backend integration. 
• Deep understanding of Modular architecture patterns, MVC, MVVM and protocol-oriented programming. 
• Familiarity with Apple Human Interface guidelines and best practices (e.g. SOLID principles).
• Proficient with Xcode, Github, Cocoapods and Swift package manager. 
• Experience with automated testing (XCTest, Swift Testing) and UI testing; TDD knowledge is a plus.
• Excellent debugging and optimization skills, using Instruments and performance testing tools. 
• Experience leveraging device capabilities such as camera, GPS, accelerometer, push notifications, and biometrics (Face ID, Touch ID) to enhance app functionality.
• Knowledge and experience integrating on-device AI features (e.g., CoreML, CreateML) for real-time processing, image recognition, natural language processing, and personalized user experiences.
• Experience with speech-to-text and text-to-speech technologies (e.g., Speech Framework, AVFoundation) for seamless voice-driven functionality.
• Strong English communication skills — must be able to collaborate effectively with English-speaking teams.
• Based in Mexico or Brazil, with the ability to work full-time hours aligned to Eastern Standard Time (EST).

Bonus points if you have:

• Experience working on AI-driven products or integrating AI features within mobile apps.
• Exposure to cross-functional collaboration with Customer Success, Sales, or Marketing teams.
• Prior experience in a startup or growth-stage company, with comfort handling ambiguity and shifting priorities.
• Familiarity with metrics-driven development and performance optimization.
• Strong interest in continued learning and staying current with iOS and Apple ecosystem changes.

What you’ll enjoy about ACTO: 

• Industry leading, multiple award-winning technology
• Competitive compensation package
• Being part of a mission driven organization with the ability to drive solutions that focus on improving patient outcomes
• Results-driven and collaborative culture
• Remote work 

At ACTO we believe diverse and inclusive teams perform better. We are an equal opportunity employer and are committed to working with applicants requesting accommodations during our interview process. We thank everyone for their interest in ACTO, only those applicants that have been selected for an interview will be contacted.

We may use AI-powered tools during parts of our hiring process to help review applications and support candidate communication. These tools are designed to assist our team, but all final hiring decisions are made by human recruiters and hiring managers. If you have any questions or concerns about this process, please let us know.