Senior Engineer(AI-First/Node/React/AWS)

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.