Senior Ruby on Rails Developer (IoT Integrations)

JobCubby; Canada; Hybrid; CAD 120,000 - 170,000; Full time

Benefits offered by this job

Remote work opportunity

Job summary

JobCubby seeks a Senior Ruby on Rails Developer (IoT Integrations) based in Canada to own backend architecture that connects software with physical devices and IoT ecosystems. You will lead multi-project delivery, guide engineering standards, and mentor engineers while collaborating with clients, firmware teams, and hardware stakeholders.

The role combines Ruby on Rails with IoT protocols, real-time processing, and distributed systems to deliver scalable APIs and reliable device-to-cloud

Qualifications

• 8+ years of professional software engineering experience, incl. 6+ years in Ruby on Rails.
• Proven IoT integrations delivered at scale.
• Strong knowledge of MQTT or similar device messaging protocols.
• API versioning, contracts, maintainability and scalability.
• Experience with PostgreSQL/MySQL and query tuning.
• Redis/Sidekiq and distributed background jobs architecture.
• Automated testing with RSpec or Minitest.
• Hands-on experience with Docker and related tooling.
• Demonstrated leadership delivering across multiple concurrent projects.

Responsibilities

• Own end-to-end architecture of Ruby on Rails applications and APIs for connected-device fleets.
• Design IoT communication layers using MQTT, WebSockets, CoAP, HTTP, or similar protocols.
• Architect high-volume telemetry ingestion, queues, event processing and real-time pipelines.
• Evaluate build-versus-buy decisions for IoT platforms and data stores, with rationale.
• Design scalable database schemas and infrastructure for time-series telemetry.
• Integrate cloud IoT services like AWS IoT Core or Azure IoT Hub (provisioning, certificates, OTA).
• Develop maintainable APIs with versioning, documentation, and long-term scalability.
• Lead code reviews, set engineering standards, promote testing practices.
• Mentor mid/senior engineers and drive technical delivery across projects.
• Conduct discovery sessions with clients and hardware teams to scope work.
• Diagnose and resolve production issues across devices, networks, and apps.

Skills

Ruby on Rails

IoT integrations

API design

Distributed systems

Testing (RSpec/Minitest)

Docker

Team leadership

MQTT/IoT protocols

Tools

PostgreSQL/MySQL

Redis/Sidekiq

AWS IoT Core

Azure IoT Hub

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Ruby on Rails Developer (IoT Integrations) based in Canada.

This is a senior engineering opportunity focused on building robust backend systems that connect software applications with physical devices and IoT ecosystems. You will own backend architecture across multiple projects, setting technical direction for connected-device fleets and cloud communication. The role combines Ruby on Rails expertise with IoT protocols, high-volume telemetry, real-time processing, and distributed systems. You will design scalable APIs and data architectures while helping ensure reliable device-to-cloud communication in production environments. As a technical leader, you will guide engineering standards, mentor developers, and serve as an escalation point for complex cross-layer issues. You will also collaborate directly with clients, firmware teams, and hardware stakeholders to turn technical requirements into practical delivery plans. This role is ideal for an experienced engineer who enjoys solving complex infrastructure challenges and working at the intersection of software and connected devices.

Accountabilities

• Own the end-to-end architecture of Ruby on Rails applications and APIs supporting connected-device fleets.
• Design and lead IoT communication layers using MQTT, WebSockets, CoAP, HTTP, or comparable device communication protocols.
• Architect high-volume telemetry ingestion, queuing, event processing, and real-time data pipelines.
• Evaluate and make build-versus-buy decisions involving IoT platforms, message brokers, and data stores, clearly communicating the technical and commercial rationale.
• Design scalable database schemas and infrastructure strategies for time-series, telemetry, and event-heavy workloads.
• Integrate cloud IoT services such as AWS IoT Core or Azure IoT Hub, including device provisioning, certificate management, and over-the-air update workflows.
• Develop maintainable APIs with appropriate versioning, contracts, documentation, and long-term scalability in mind.
• Lead code reviews, establish engineering standards, and promote strong development and testing practices.
• Mentor mid-level and senior engineers through technical guidance, reviews, and knowledge sharing.
• Conduct technical discovery sessions with clients, firmware teams, and hardware stakeholders to understand requirements and define scoped delivery plans.
• Diagnose and resolve complex production issues spanning device, network, infrastructure, and application layers.
• Own technical delivery across multiple concurrent projects while maintaining quality, reliability, and delivery standards.

Requirements

• 8+ years of professional software engineering experience, including at least 6 years of hands‑on Ruby on Rails development.
• Proven experience delivering and scaling production‑grade IoT integrations.
• Deep knowledge of MQTT or equivalent device messaging protocols and experience operating them at scale.
• Strong API architecture and design skills, including APIversioning, contracts, maintainability, and scalability.
• Extensive experience with PostgreSQL or MySQL, including query optimization, indexing, and database performance tuning.
• Strong knowledge of Redis, Sidekiq and distributed background job architectures.
• Solid automated testing experience using RSpec, Minitest or comparable frameworks.
• Hands‑on experiencewith Docker…(others)
• Demonstrated experience leading engineering teams or owning technical delivery across multiple concurrent projects.
• Strong problem‑solving and troubleshooting skills across distributed application and device environments.
• Excellent communication skills and the ability to explain complex technical decisions to clients and cross-functional stakeholders.
• Strong ownership, technical judgment, and ability to operate independently in a senior engineering environment.

Benefits

• Opportunity to work on technically challenging IoT and connected-device projects.
• Exposure to Ruby on Rails, cloud IoT platforms, distributed systems, real‑time processing, and high‑volume data architectures.
• Significant ownership of backend architecture and technical direction across multiple projects.
• Opportunity to work directly with clients, hardware teams, firmware engineers, and other technical stakeholders.
• Leadership opportunities through mentoring, code reviews, and engineering standards.
• Continuous exposure to emerging technologies across IoT, cloud infrastructure, APIs, and distributed systems.
• Remote work opportunity.
• Opportunity to contribute to diverse technology projects spanning startups, SMEs, and enterprise environments.