Architect & Ship Greenfield React Native B2B Mobile

Transreport; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

25 days holiday

Free flu jab for you and your family

Job summary

Transreport is hiring a Senior Mobile Engineer to own a greenfield React Native product for iOS and Android, collaborating with our Ruby on Rails engineers. This high-autonomy role will define architecture, testing, CI/CD, and release foundations while aligning with Product and Design.

You will lead the mobile roadmap, deliver a scalable cross-platform foundation, and drive measurable improvements in quality, stability, and delivery velocity.

Qualifications

• 6+ years of mobile engineering experience.
• Deep React Native and TypeScript expertise across architecture, testing, performance, and production delivery.
• Strong judgement about when React Native needs native platform capabilities or modules.
• Proven experience designing a greenfield system and shipping production iOS and Android applications.
• Experience establishing a development environment and technical direction from scratch.
• Comfortable explaining trade-offs between delivery speed, product needs, and maintainability.
• Ability to manage ambiguity, own multiple verticals, and move between architecture and hands-on delivery.
• Strong communication skills, surfacing delivery confidence, risks, dependencies, and technical debt.
• Experience collaborating with Ruby on Rails or similar backend teams.
• Experience in transport, logistics, or regulated industries.
• Familiarity with mobile observability, performance profiling, testing, and app-store releases.
• Experience working in B2B SaaS environments.
• Exposure to native iOS and Android development.

Responsibilities

• Architect & Build - Define, own, and ship a greenfield React Native B2B application for iOS and Android. Set architectural standards for near-term delivery and long-term scalability.
• Own Delivery - Manage multiple workstreams in a small team, turning product goals into technical plans and carrying them through build, release, and iteration.
• Design for the Long Term - Make pragmatic greenfield architecture decisions balancing delivery speed with maintainability, scalability, accessibility, and technical debt.
• Partner with Backend - Work with Rails engineers to shape API contracts, data flows, authentication, observability, and a sustainable mobile/backend boundary.
• Technical Leadership - Proactively communicate timelines, delivery confidence, dependencies, risks, and trade-offs to help product and engineering decisions.

Skills

React Native

TypeScript

Architecture

Performance

Testing

CI/CD

Backend integration

Communication

Regulated industries

B2B SaaS

Mobile observability

App store releases

Native iOS/Android

Job description

Transreport is hiring a Senior Mobile Engineer to own a greenfield React Native product for iOS and Android, collaborating with our Ruby on Rails engineers. This high-autonomy role will define architecture, testing, CI/CD, and release foundations while aligning with Product and Design.

You will lead the mobile roadmap, deliver a scalable cross-platform foundation, and drive measurable improvements in quality, stability, and delivery velocity.