Junior–Mid Mobile App Developer

Backend API & Database

• Develop and optimise RESTful API endpoints using Node.js and Express to support mobile client requirements.
• Identify and resolve API performance bottlenecks, query analysis, response caching, payload optimisation, and pagination strategies.
• Write efficient queries and data models for both PostgreSQL (relational data) and MongoDB (document data), understanding the trade-offs of each.
• Implement and improve database indexing strategies, and participate in schema review discussions.
• Ensure APIs are well-documented, versioned, and backward compatible where appropriate.

DevOps & Infrastructure

• Containerise services using Docker and contribute to deployment pipelines via GitHub Actions.
• Work with AWS services (EC2, ECS, S3) to support deployments, environment configuration, and asset management.
• Participate in code reviews and CI/CD pipeline improvements, ensuring quality gates are met before merge.

AI-Assisted Development

• Use AI coding tools (such as GitHub Copilot, Cursor, or Claude) as a genuine productivity multiplier, not a replacement for engineering judgement.
• Understand what you ship: all AI-generated code must be read, understood, tested, and owned by you before it reaches a PR.
• Apply AI assistance strategically, scaffolding, boilerplate, test generation, refactoring, and documentation, while writing critical business logic and architecture decisions yourself.
• Stay current with the evolving AI tooling landscape and share useful workflows with the team.
• Recognise the limits of AI-generated output: catch hallucinated APIs, logic errors, security issues, and performance anti-patterns.

Quality & Ownership

• Write unit and integration tests using Jest, maintaining meaningful test coverage.
• Take full accountability for your deliverables, from scoping and implementation through to post-release monitoring.
• Proactively identify technical debt and raise it clearly, proposing incremental improvements.
• Maintain thorough documentation of your work, code comments, README updates, and internal wikis.

Technology Stack

We do not expect perfection in every area on day one — but you should be genuinely curious and willing to grow across the full stack.

• React Native + Expo Core mobile framework
• JavaScript / TypeScript Primary languages
• Zustand, TanStack Query State management
• REST API API integration
• Node.js + Express Backend services
• PostgreSQL + MongoDB Relational & document DBs
• AWS (EC2, ECS, S3) Cloud infrastructure
• Docker Containerisation
• GitHub + GitHub Actions Version control & CI/CD
• Jest Unit & integration testing

Required Skills & Experience

• Demonstrable experience building mobile applications with React Native (with or without Expo).
• Comfortable using AI coding tools (Copilot, Cursor, Claude, etc.) as a productivity aid, with the discipline to review, understand, and take full ownership of every line of output.
• Solid proficiency in JavaScript, with working knowledge of TypeScript.
• Familiarity with REST API consumption and integration patterns in a mobile context.
• Understanding of state management concepts; experience with Zustand, Redux, or similar.
• Basic experience with Node.js and backend API development.
• Comfortable working with relational databases (PostgreSQL or similar) and writing raw SQL queries.
• Experience using Git and working within a branching/PR-based workflow.
• A genuine interest in UI/UX, you appreciate good design and care about the end user experience.
• Ability to own a feature end-to-end and communicate progress clearly.

Nice to Have

• Experience with MongoDB or other document databases.
• Knowledge of Docker and containerised development environments.
• Exposure to AWS services in a professional setting.
• Experience writing tests with Jest or equivalent frameworks.
• Familiarity with CI/CD pipelines and GitHub Actions.
• Understanding of telematics, fleet management, HR, or workforce management domains.
• Previous experience working in a startup or product-led environment.

Who You Are

Technical skills matter, but so does mindset. We are looking for someone who:

• Takes genuine ownership — you do not wait to be told; you identify issues and act.
• Communicates proactively — blockers, risks, and progress are shared early and clearly.
• Sweats the details — you care about the quality of what you ship, from code to UX.
• Asks great questions — you understand requirements deeply before writing a line of code.
• Uses AI tools wisely — you leverage them to move faster, not to avoid thinking; you can always explain and defend every line of code in your PRs.
• Collaborates well — you raise the performance of those around you and welcome peer feedback.

What We Offer

• Competitive salary, reviewed annually
• Fully remote role
• Direct exposure to the full product lifecycle across four growing products
• A genuinely collaborative, low-ego engineering culture
• Clear progression pathway — we invest in our people and promote from within
• Learning & development budget for courses, conferences, and tooling
• Regular team socials and a strong team culture

AR Experts Ltd is an equal opportunities employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

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Junior–Mid Mobile App Developer

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