Senior Mobile Developer (React Native)

About Sidekick: Sidekick is a premier, internationally recognized direct-to-consumer (DTC) wellness pioneer, physical rehabilitation innovator, and muscular recovery leader on an absolute mission to help athletes and everyday people recover from injuries confidently. By manufacturing state-of-the-art physical therapy products and muscle-mapping instruments, Sidekick unifies physical recovery tools with intuitive, cross-platform instructional technology. Composed of an elite, lean distributed engineering workforce, the organization builds web and mobile solutions centered on high user autonomy, code maintainability, and clean user experience flows. Sidekick champions a transparent, remote-first contractor model that values deep personal ownership, encouraging individual software craftsmen to shape products that directly impact thousands of active journeys back to optimal health safely across global mobile storefronts.

Position Overview

We are seeking a highly sophisticated, architectural-minded Senior Mobile Developer (React Native) to join our core global Product division in a long-term, full-time remote contractor capacity across Latin America. Claiming absolute individual technical accountability over our central customer companion mobile application across both iOS and Android platforms, you will drive the entire software lifecycle from initial blueprinting down through deployment, performance tuning, and cross-platform maintenance. Moving entirely beyond skin-deep visual styling or uninsulated interface wrapping, this high-agency seat requires you to take full ownership of our backendless cloud architecture and ensure that every instructional module, payment gateway, and user authentication barrier runs flawlessly. This role demands a seasoned full-stack mobile craftsman possessing 7+ years of verifiable experience who implements rigid test coverage, manages store rejection reviews calmly, and works seamlessly on North American working hours.

Key Responsibilities

• Cross-Platform Mobile Application Ownership: Code, design, and implement efficient, highly scalable cross-platform visual features natively utilizing React Native and TypeScript across iOS and Android devices.
• Backendless Supabase Architecture Governance: Manage and expand our cloud-native storage and data access layers, configuring secure user validation flows, Postgres datastores, and Row Level Security (RLS) rules natively within Supabase.
• Transactional Gateway SDK Integration: Implement, update, and secure digital payment components, building seamless in-app purchasing models natively leveraging **Stripe** alongside Google Pay and Apple Pay frameworks.
• App Store Submission & Release Triage: Own the end-to-end publishing pipeline across Apple App Store and Google Play Console environments, managing native builds, provisioning certificates, and resolving shop store rejections confidently.
• Sentry Telemetry and Crash Debugging: Monitor real-time application health registries, utilizing **Sentry** logs to proactively triage, isolate, and eliminate production runtime crashes and memory leaks.
• End-to-End Quality Assurance Engineering: Conduct exhaustive automated and manual unit testing matrices, taking full personal responsibility for safeguarding adjacent interface flows affected by your code deployments.
• Agile Scope Estimation: Provide precise technical complexity estimations, map operational tasks, and manage personal workflow records and timesheets transparently within collaborative project management spaces.
• Cross-Functional Product Synchronization: Collaborate asynchronously alongside remote design and product cells, translating visual instruction blueprints into ultra-smooth mobile performance benchmarks.

Required Skills & Qualifications

• 7+ years of verified professional history running advanced mobile application development, full-stack systems engineering, cross-platform app deployment, or digital product architecture.
• Deep, authoritative technical command of cross-platform layout engineering, state machine modeling, and rendering lifecycles natively inside React Native frameworks.
• Proven, production-tested track record successfully launching and maintaining active, live user applications across both the Apple App Store and Google Play platforms (valid store application links are mandatory for evaluation).
• Demonstrated experience configuring database behaviors, relational tables, and access security constraints natively inside Supabase or standalone cloud-managed Postgres databases.
• Hands-on experience integrating third-party software development kits (SDKs) for digital monetization, payment parsing, or electronic wallet processing.
• Outstanding problem-solving logic, with a demonstrated ability to construct highly modular, well-documented, and thoroughly tested mobile codebases using modern automated testing paradigms.
• Outstanding verbal and written communication mechanics in fluent English, showcasing an absolute capacity to cooperate smoothly inside distributed, cross-border digital spaces.
• Location Context and Schedule Alignment: Parameters open exclusively to qualified mobile engineers base-stationed permanently within Mexico, Argentina, Colombia, Chile, Costa Rica, or Brazil who maintain full availability to align operations on a stable daily schedule following the North American Eastern Time (EST/EDT) zone.

Preferred Strategic Indicators (Nice to Have)

• Prior commercial history writing native mobile source files, utilizing Swift/Objective-C for iOS or Java/Kotlin for Android to build custom native bridges.
• Familiarity with direct-to-consumer mobile applications, multimedia streaming optimization, or background sync services for bluetooth-connected recovery tracking.
• An outcome-driven, self-directed startup mindset that thrives when trusted with absolute feature ownership and avoids the need for constant micro-management.

What We Offer

• Stable Full-Time Global Retainer: A highly competitive annual baseline contract compensation matrix structured transparently between $72,000 – $84,000 USD per year, disbursed reliably as a fixed monthly contractor retainer allocation.
• The exceptional professional canvas to directly direct, code-shape, and deploy the mobile interfaces guiding muscle recovery and functional fitness for athletes and consumers nationwide.
• Profound work-from-home remote parameters providing an elite digital workplace, absolute scheduling trust, and zero physical office geographical commuting friction within Latin America.
• Immediate inclusion into a tight-knit, collaborative product environment that rejects structural bureaucracy to give your engineering insights real corporate impact.
• Access to a steady, multi-year pipeline of complex mobile features, unblocking long-term professional portfolio expansion alongside veteran digital specialists.