Senior Backend Engineer

About ThingsX

ThingsX is a US-based leading innovator in the Internet of Things (IoT) industry, developing and scaling industry-specific IoT solutions—from PC IoT and cold chain for food and beverage to advanced tracking and monitoring systems—on the AWS Cloud platform. Our team harnesses real-time data from smart sensors and intelligent platforms to enhance efficiency, deliver actionable insights, and unlock new growth opportunities for clients. We leverage IoT to meet specific industry needs, empowering customers with cutting-edge technology and scalable solutions.

With a focus on efficiency, sustainability, and convenience, ThingsX designs solutions that use real-time data to enable automation, monitoring, and insights across industries. Our team collaborates closely with clients to address unique challenges and opportunities, ensuring each solution is tailored to their needs.

Role Overview

We are seeking a Senior Backend Engineer to design, build, and operate core services of the ThingsX cloud platform. This role combines strong backend engineering fundamentals—including highly concurrent, scalable systems—with mandatory, day-to-day proficiency in modern AI coding assistants (including Anthropic Claude / Opus and comparable frontier models) for design, implementation, code review, debugging, and agent-assisted workflows.

Reports to: Manager, Engineering

Technology Stack

• Languages: Java, SQL

• Frameworks: Spring Boot, Spring Cloud, Vert.x

• Messaging: MQTT, RabbitMQ, Kafka

• Database: MySQL, Redis, Elasticsearch

• Cloud: AWS (EKS, RDS, S3, IAM, CloudWatch)

• Infrastructure: Docker, Kubernetes

• Observability: Grafana, Prometheus

• Development: GitHub, GitHub Actions, Maven

• AI Tools: Claude / Opus (and equivalent frontier models used in daily engineering workflows)

Key Responsibilities

• Design, develop, and maintain backend microservices for the ThingsX IoT cloud platform (device management, authentication, messaging, APIs, and related services).

• Design and evolve highly concurrent, scalable backend systems that reliably handle growth in devices, connections, and traffic.

• Build and improve MQTT / IoT gateway and cloud-to-device communication paths with reliability, security, and operability in mind.

• Own features end-to-end: technical design, implementation, testing, code review, CI/CD-supported delivery, deployment support, and production troubleshooting.

• Work with relational data stores (MySQL), caching (Redis), search (Elasticsearch), and messaging systems (MQTT, RabbitMQ, Kafka) as part of daily development.

• Collaborate with Engineering, DevOps, Product, and customer-facing teams on requirements, incidents, and platform improvements.

• Use AI coding assistants (Claude / Opus and equivalent models) daily for architecture exploration, implementation, reviews, debugging, test generation, and multi-step agent workflows—while remaining accountable for correctness, security, and code quality.

• Mentor peers on effective, responsible AI-assisted engineering practices and document patterns that improve team velocity without reducing quality.

• Participate in on-call / production support activities as needed for the services you own.

Required Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience.

• Typically 5+ years of professional backend software development experience (or equivalent senior-level track record).

• Proficiency in Java and Spring Boot for production microservices; familiarity with Spring Cloud and/or Vert.x is a strong plus.

• Experience designing highly concurrent, scalable backend systems.

• Strong experience with MySQL (or equivalent RDBMS) and Redis; exposure to Elasticsearch is a plus.

• Hands-on experience building and operating services on AWS (e.g., EKS, RDS, S3, IAM, CloudWatch).

• Experience with microservice architectures; familiarity with Docker and Kubernetes.

• Experience with CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI, etc.).

• Solid understanding of REST APIs, authentication/authorization patterns, and secure service-to-service communication (e.g., TLS).

• Experience with messaging systems such as MQTT, RabbitMQ, and/or Kafka.

• Mandatory AI proficiency: demonstrated, current daily use of Claude and/or Opus (or equivalent frontier models) in professional software work—including code reviews, debugging, design exploration, and agent-style task execution. Candidates should be able to describe concrete workflows they use today, not only general interest in AI.

• Strong written and verbal communication skills; ability to work effectively in a hybrid Taiwan-based engineering organization.

• Ability to work on-site in Taiwan three days per week and remotely two days per week.

Preferred Qualifications

• Deep experience with MQTT, IoT device platforms, or cellular/device connectivity systems.

• Hands-on experience with Grafana and Prometheus for service monitoring and operational dashboards.

• Familiarity with AWS Bedrock or other enterprise LLM hosting for engineering workflows.

• Prior ownership of production incidents, SLOs, or reliability improvements for high-throughput services.

Location & Work Arrangement

Taiwan · Hybrid · Three (3) days per week in office · Two (2) days per week remote · Full-time employee.

How to Apply

Please apply via LinkedIn with your resume and a brief note describing (1) your most relevant backend production experience—especially concurrency/scalability—and (2) how you currently use Claude/Opus (or equivalent) in day-to-day engineering work.

ThingsX is an equal opportunity employer. Employment decisions are based on qualifications, merit, and business need.