Senior Software Engineer - Cloud Services

Simbex is a company focused on connected-device and sensor-analytics platforms. They are seeking a Senior Software Engineer - Cloud Services to build and modernize backend systems, manage cloud platforms, and ensure the reliability of device data handling.

Responsibilities:

• Lead design and evolution of the backend services and REST APIs that ingest, route, and serve device sensor data, balancing day-to-day delivery with long-term platform health
• Build and operate serverless services on AWS: primarily Lambda, API Gateway, and managed databases for scalable, cost-efficient cloud workloads
• Help modernize the platform toward event-driven patterns, introducing asynchronous messaging and streaming (e.g., SQS/SNS, Kinesis, or Kafka) where they improve reliability and scale
• Design and optimize relational databases (PostgreSQL on RDS) for high-throughput sensor data storage and demanding query workloads, applying solid schema design, indexing, and performance tuning
• Define and maintain clear API contracts between internal services, device clients, and external platform consumers
• Implement authentication, authorization, and security best practices across APIs and cloud services (OAuth 2.0, API Gateway, IAM)
• Instrument services with structured logging, metrics, and distributed tracing to support observability and proactive incident response
• Drive engineering maturity: CI/CD, automated testing, and code-quality standards. Lead design reviews as part of the team's formal review process
• Write clean, modular, well-tested code (unit, integration, and contract tests) and set the standard for quality across the codebase
• Collaborate with firmware, algorithm, and data teams to align on device communication protocols, data contracts, and platform SLAs, working within an Agile/SAFe delivery model
• Mentor engineers and help shape the technical direction, standards, and best practices of the platform

Requirements:

• 6+ years of professional backend or cloud software engineering experience, including time in a senior or technical-lead capacity
• Bachelor's degree in Computer Science, Software Engineering, or a related technical field — or equivalent professional experience
• Strong proficiency in Node.js/TypeScript and Python for building production backend services
• Hands-on experience with core AWS services: Lambda, API Gateway, RDS, S3, and SQS/SNS
• Experience designing and operating serverless or service-oriented architectures in production
• Solid understanding of RESTful API design principles, versioning, and contract-first development
• Strong relational database skills (PostgreSQL or similar) — schema design, indexing, query optimization, and performance tuning
• Demonstrated ability to lead technical design, mentor engineers, and drive decisions across cross-functional teams
• Familiarity with CI/CD practices and tooling (GitHub Actions, Jenkins, or similar)
• Experience working in an Agile environment (Scrum, Kanban, or SAFe)
• Experience with IoT connectivity protocols: MQTT, AMQP, or AWS IoT Core
• Experience with containerization and orchestration (Docker, ECS, or Kubernetes)
• Experience with infrastructure-as-code tooling: Terraform, AWS CDK, or CloudFormation
• Experience introducing event-driven or streaming architectures (Kafka, Kinesis, or similar) into an existing platform
• Familiarity with observability platforms: OpenTelemetry, Datadog, Grafana, or AWS CloudWatch
• Experience with API contract testing frameworks such as Pact or similar
• Background in connected devices, wearables, sensor-data platforms, or other high-reliability or regulated domains