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Senior Mobile Developer (Kotlin, React Native or Swift) at MAS Global Consulting. Location Information: 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.