Senior Cloud Native Developer

We are seeking a Senior Cloud Native Developer to join our team building SIS Core, an internally developed, event-driven platform powered by AWS serverless technologies. In this role, you will work within an established codebase and set of engineering conventions, contributing to architecture, infrastructure, and end-to-end testing strategy for a complex distributed system.

Responsibilities

• Design, build, and maintain event-driven services running on AWS serverless infrastructure
• Contribute to architectural decisions and document design choices
• Develop and maintain infrastructure using Infrastructure as Code
• Ensure reliability, scalability, and operational excellence across services
• Write and maintain automated end-to-end tests
• Collaborate with other engineers to evolve platform capabilities and engineering standards
• Work independently with minimal supervision to make sound technical decisions and justify trade-offs
• Navigate and contribute to complex distributed systems
• Influence architectural direction, not just implement requirements

Requirements

• 6+ years of relevant professional experience, with strong expertise in Python as a primary development language
• Solid understanding of AWS architecture, including VPCs, networking fundamentals, and multi-account environments
• Knowledge of security and operational best practices and how AWS services integrate within larger systems
• Hands-on experience with AWS Lambda, event-driven application design, and production operation of serverless workloads
• Experience designing and operating systems using EventBridge, SQS, and SNS
• Understanding of asynchronous communication patterns and distributed system design principles
• Experience with AWS CDK, ideally in TypeScript, and comfort working with both Python and TypeScript
• Deep operational and architectural expertise in DynamoDB, including single-table design, access-pattern-driven modelling, GSIs, LSIs, capacity planning and capacity modes, Streams, TTL, and PITR
• Strong understanding of ACID vs. BASE trade-offs, eventual consistency, and consistency challenges in distributed systems, including implications for DynamoDB and event-driven architectures
• Experience designing and operating event-driven microservice architectures, including service boundaries, event contracts, and failure handling
• Ability to evaluate multiple design approaches, make informed architectural decisions, and clearly communicate and document trade-offs
• Experience with automated testing strategies, including end-to-end testing, and data modeling and validation tools such as JSON Schema and Pydantic
• English proficiency at B2 level or higher

Nice to have

• Familiarity with BDD frameworks such as Behave
• Background in OpenSearch development and operational experience
• Skills in application profiling and memory optimization
• Experience monitoring and operating high-volume, mission-critical systems
• Expertise in API design and implementation, including GraphQL