Principal Mobile Developer

Fidelity will not provide immigration sponsorship for this position.

Job Description:

Position

Description:

Develops and enhances full stack web applications and native mobile applications using Test Driven Development (TDD) and automated testing to ensure stability, resilience, and strong code coverage. Builds native iOS applications using Swift and SwiftUI, and native Android applications using Kotlin and Compose. Designs and implements scalable back-end services, RESTful Application Programming Interface (APIs), and microservices architecture. Executes end-to-end releases with automated Continuous Integration/Continuous Delivery (CI/CD) pipelines using Jenkins and platform specific tooling for web and mobile deployments.

Works with architecture, security, and User Experience (UX) design teams to deliver compliant, accessible, and user friendly solutions aligned with Web Content Accessibility Guidelines (WCAG), Apple Human Interface Guidelines, and Material Design. Supports efficient engineering practices, including trunk-based development, feature toggles, and branch by abstraction, using CI/CD and testing tools. Develops back-end systems using cross platform knowledge, API design, and security best practices including OAuth (Open Authorization) and OpenID Connect, and Amazon Web Services (AWS) Elastic Compute Cloud (EC2), Lambda, DynamoDB, and Simple Storage Service (S3).

Applies engineering best practices and security standards to ensure quality, maintainability, and compliance.

Primary Responsibilities:

Designs, develops, and maintains full-stack features across back-end and native mobile platforms (iOS and Android).Coordinates end-to-end feature development from concept through production deployment, taking ownership of technical decisions across the entire stack.

Builds and maintains scalable microservices and RESTful/GraphQL APIs that support web and mobile application functionality.

Develops comprehensive documentation for multiple applications or subsystems.

Plans and coordinates project schedules and assignments for multiple technology initiatives.

Advises on risk assessment and risk management strategies for engineering projects.

Provides technology solutions to daily issues and delivers technical evaluation estimates for upcoming initiatives.

Mentors junior team members.

Contributes to technical roadmap planning and advises senior management on technical strategy.

Monitors application performance, troubleshoots issues, and implements optimizations across the technology stack.

Researches and evaluates advancements in self-custody crypto wallet encryption to inform design decisions, enhance security controls, and ensure alignment with emerging standards.

Education and Experience:

Bachelor’s degree in Computer Science, Engineering, Information Technology, Information Systems, or a closely related field (or foreign education equivalent) and five (5) years of experience as a Principal Mobile Developer (or closely related occupation) developing native mobile applications for iOS and Android and integrating them with back-end APIs, within an Agile and Dev Ops environment.

Or, alternatively, Master’s degree in Computer Science, Engineering, Information Technology, Information Systems, or a closely related field (or foreign education equivalent) and three (3) years of experience as a Principal Mobile Developer (or closely related occupation) developing native mobile applications for iOS and Android and integrating them with back-end APIs, within an Agile and Dev Ops environment.

Skills and Knowledge:

Candidate must also possess:
· Demonstrated Expertise designing scalable backend services and microservices architecture using Node.js, NestJS, or GraphQL; and building RESTful or GraphQL APIs with…