Senior Mobile Developer (Kotlin, React Native or Swift) | Colombia

Who We Are

At MAS Global Consulting, we are a premium digital engineering partner trusted by innovative startups and Fortune 100 companies, delivering high-impact solutions through agile delivery, deep technical expertise, and a strong people-first culture across the Americas.

We build long-term partnerships, not just software. MAS means “more” in Spanish, and that mindset drives our commitment to greater opportunity, inclusion, and impact.

Founded by a Latina engineer from Medellín and headquartered in Tampa, Florida, MAS Global Consulting is a 100% Hispanic and woman-owned company, recognized as a Great Place to Work and one of the Fastest-Growing Companies in the US.
Who You Are

You’re a Senior Mobile Developer with strong experience building mobile consumer experiences in production. You thrive in ambiguous problem spaces, operate with a high degree of autonomy, and enjoy owning features end to end.

You’re comfortable collaborating closely with Product, Design, and Analytics, shipping polished, customer-facing experiences, and making pragmatic technical decisions that balance speed, quality, and scalability. This is a hands-on individual contributor role with no people management responsibilities.

What You’ll Do

• Design and build mobile-first consumer experiences and supporting APIs that power growth, personalization, and experimentation across the mobile app.
• Own well-scoped features end to end, from technical design and implementation through testing, launch, and iteration in production.
• Partner closely with Product Managers, Designers, Data Scientists, and Analytics to translate growth strategy into intuitive, high-impact mobile experiences.
• Contribute to architectural decisions that ensure scalable, reliable, and maintainable systems supporting mobile surfaces.
• Write clear technical documentation and design proposals to support effective asynchronous collaboration.
• Uphold high engineering standards around performance, security, observability, testing, and reliability, especially for customer-facing mobile features.

What You Bring

• 5+ years of experience building and shipping mobile consumer experiences in production environments (or equivalent depth).
• Proficiency in iOS (Swift), Android (Kotlin), and/or React Native, with experience maintaining production mobile applications.
• Exposure to cloud-based systems (e.g., AWS) and how mobile features are built, deployed, and operated at scale.
• Proven ability to independently deliver complex, user-facing features with a high bar for polish, performance, and reliability.
• Solid understanding of how mobile clients integrate with backend services, including APIs, data modeling, error handling, and service reliability.
• Experience collaborating closely with Product and Design to translate strategy into high-quality mobile features.
• Experience owning end-to-end features spanning mobile clients and supporting backend services.
• Familiarity with backend technologies such as Python, Kotlin, or similar, in support of mobile experiences.
• Comfortable working in a remote, async-first, cross-functional environment, and able to ramp quickly in an existing mobile codebase.
• Ability to move fast, make pragmatic technical decisions, and deliver meaningful impact within a short-term engagement.
• English proficiency at B2 level or higher.