3asoft

About the Project

We're building an enterprise IoT platform that transforms connected devices such as coffee machines, refrigerators, and similar hardware into secure, self-service stations with access control and usage tracking.

As part of the mobile team, you'll develop and maintain two white-label applications used by end users and operators. The mobile layer is built with React Native and Expo, consuming strongly typed backend APIs delivered by the platform team.

The project follows an AI-assisted development approach, supported by a well-defined architecture and engineering standards. You'll work closely with an experienced software architect who oversees the overall system design and code quality. This is a dedicated mobile development role with no backend responsibilities and no direct client communication.

Technology Stack

Mobile

• React Native
• Expo (mandatory)
• TypeScript
• NativeWind
• Tailwind CSS

State Management & Data

• TanStack Query

Testing

• Detox
• Maestro

Development Tools

• Claude Code
• Codex
• GitHub
• Linear
• CodeRabbit

CI/CD & Distribution

• EAS Build
• EAS Submit
• OTA Updates
• App Store & Google Play release pipelines

Responsibilities

• Develop and maintain consumer and operator mobile applications within a shared React Native codebase
• Implement features such as QR/NFC-based access, transaction history, notifications, device monitoring, restocking workflows, issue reporting, and device onboarding
• Build and maintain a scalable white-label architecture supporting multiple brands through configuration-driven theming and feature management
• Integrate with typed backend APIs and ensure robust handling of authentication, loading states, errors, offline scenarios, and synchronization
• Manage the complete mobile release lifecycle, including builds, store submissions, OTA updates, signing certificates, and deployment processes
• Create accessible, responsive, and RTL-compatible user interfaces that meet modern usability standards
• Develop and maintain automated tests, including component, integration, and end-to-end test coverage
• Leverage AI-powered development tools effectively while maintaining strong engineering judgment and ownership of delivered code
• Participate in daily asynchronous communication and weekly project review sessions

Requirements

• 3+ years of professional experience building and shipping React Native applications
• Proven experience with the Expo ecosystem, including EAS Build, EAS Submit, OTA updates, and mobile release management
• At least one production application published on the App Store and/or Google Play (portfolio, store link, or demo required)
• Strong TypeScript and modern React skills, including hooks, component composition, and scalable state management patterns
• Hands-on experience with NativeWind and Tailwind CSS
• Experience building reusable UI components and working with design systems
• Experience implementing white-label or multi-tenant mobile applications is highly desirable
• Solid understanding of mobile API integration patterns, authentication flows, caching, retries, and offline-first considerations
• Experience using AI-assisted coding tools such as Claude Code, Codex, Cursor, or similar solutions in a professional workflow
• Strong written and verbal English communication skills
• Ability to work independently in a remote-first environment

Nice to Have

• Experience with React web applications and the TanStack ecosystem
• Push notification implementation using Expo Notifications, FCM, and APNs
• Experience building custom native modules or Expo config plugins
• Familiarity with Reanimated and Gesture Handler for advanced mobile interactions
• Previous experience delivering white-label, multi-brand, or enterprise mobile products
• Experience working in IoT, connected-device, or hardware-integrated environments

About the Project

We are developing a cloud-based platform that transforms connected devices such as coffee machines, refrigerators, and other smart equipment into secure, usage-metered self-service stations for enterprise organizations.

The platform is designed from the ground up with an AI-first engineering approach and a strong architectural foundation. It is built as a modular NestJS application following Domain-Driven Design (DDD) and Hexagonal Architecture principles, deployed on AWS, including highly regulated environments. The system supports multi-tenant isolation through PostgreSQL Row-Level Security and emphasizes reliability, security, and operational correctness.

You will collaborate directly with the lead architect, taking ownership of major business domains and delivering production-ready functionality with the support of AI-powered development tools. While AI accelerates implementation, engineering judgment, quality control, and accountability remain essential.

Tech Stack

Backend

• NestJS
• TypeScript
• Node.js

Frontend

• React
• TanStack Router
• TanStack Query

Database

• PostgreSQL
• Multi-tenancy
• Row-Level Security (RLS)

Cloud & Infrastructure

• AWS ECS Fargate
• RDS PostgreSQL
• SQS
• EventBridge
• IoT Core
• Lambda
• Cognito
• API Gateway
• SNS
• KMS
• Terraform

Development Environment

• Turborepo monorepo
• Shared contracts and domain packages
• GitHub
• Linear
• Claude Code
• CodeRabbit

Platform Reliability

• Transactional outbox/inbox patterns
• Idempotent event processing
• Mutual TLS (mTLS)
• Exactly-once delivery guarantees

Key Responsibilities

• Design, develop, and maintain core business domains including access management, provisioning, device lifecycle, consumption tracking, monitoring, reporting, and exports.
• Leverage AI-assisted development tools while maintaining full ownership and responsibility for code quality and production readiness.
• Preserve architectural integrity by applying DDD and Hexagonal Architecture principles consistently across the platform.
• Develop integrations with hardware vendors, enterprise customer systems, messaging services, and external APIs using anti-corruption layer patterns where appropriate.
• Own and evolve the platform's reliability mechanisms, ensuring transactional consistency, fault tolerance, and zero-loss processing.
• Provision, manage, and optimize AWS infrastructure using Terraform.
• Build and enhance a multi-tenant administration portal using React and TanStack technologies.
• Establish and maintain automated testing strategies, including unit, integration, end-to-end, and contract testing.
• Collaborate on security architecture, access control, encryption strategies, auditing, and compliance requirements.

What We're Looking For

• 7+ years of experience building and operating production-grade software systems.
• 2+ years of hands-on NestJS experience 
• Practical experience applying Domain-Driven Design concepts including bounded contexts, aggregates, domain events, value objects, and ports-and-adapters architecture.
• Strong AWS expertise covering ECS Fargate, RDS/PostgreSQL, IAM, SQS, EventBridge, Cognito, KMS, SNS, and API Gateway.
• Experience with AWS IoT Core, including device provisioning, certificate-based authentication, and OTA deployment workflows.
• Deep understanding of event-driven systems, idempotency, messaging patterns, dead-letter processing, and distributed reliability concerns.
• Production experience with Terraform and containerized cloud deployments.
• Experience working within monorepos such as Turborepo and maintaining shared packages or contract libraries.
• Advanced PostgreSQL knowledge, including schema design, migrations, performance optimization, and multi-tenant security models.
• Experience with payment processing, authorization/capture flows, tokenized payment methods, or ledger-based systems.
• Strong React experience, particularly building administrative or operational dashboards.
• Proven ability to use AI-powered engineering tools effectively while maintaining high standards for validation, testing, and code review.

Would be a plus

• Experience with PCI-related systems or payment provider integrations.
• Knowledge of large-scale edge device management and OTA deployment strategies.
• Hands-on AWS Lambda and serverless development experience.
• Experience working in enterprise environments with strict security, compliance, or regulatory requirements.
• Background in highly reliable, mission-critical, or financially sensitive systems.