Senior Backend Developer

Cognitive Systems Corp•Kitchener, ON

8d•Hybrid

About The Position

This role is for a Senior Backend Developer focused on Cloud & APIs. The ideal candidate is a strong backend developer who enjoys building reliable cloud services and APIs, thrives in a fast-paced environment, collaborates with a high-caliber team, and takes ownership from design through production. The position involves working on smart home technology aimed at supporting aging-in-place.

Requirements

Bachelor's degree in computer science or a related field (or equivalent experience).
5+ years of relevant software development experience, with a strong track record of delivering production-ready systems.
Strong ownership mindset and ability to deliver independently while collaborating well.
Experience building and maintaining REST APIs in production (testing, monitoring, reliability).
Proficiency in JavaScript/TypeScript.
Experience with Docker, Git, and modern development workflows (code reviews, CI).
Solid fundamentals in backend design: data modeling, performance, security, and debugging.

Nice To Haves

Experience with AWS and/or cloud infrastructure (Kubernetes a plus).
Experience with PostgreSQL, MongoDB, and/or time-series databases.
Automated testing with tools like Jest (or similar).
Exposure to React or other frontend frameworks.
IoT platform experience (e.g., MQTT) and large-scale data ingestion pipelines.

Responsibilities

Build, maintain, and operate scalable, secure backend services and APIs (TypeScript and/or Python).
Design and evolve data models and services across SQL and NoSQL systems (e.g., PostgreSQL, MongoDB, time-series).
Develop integration-ready APIs and workflows for partners and customers (authentication, versioning, reliability, observability).
Collaborate with product, data science, and engineering to deliver new features end-to-end.
Improve our developer experience: CI/CD pipelines, testing, monitoring/alerting, and internal tooling.