Senior Ruby on Rails Developer, IoT Integrations

Job not on LinkedIn

🔥 0 minutes ago

🇨🇦 Canada – Remote

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Zazz

WebsiteLinkedInAll Job Openings

501 - 1000 employees

Founded 2009

💼 Consulting

📣 Marketing

🔌 API

Consulting • Marketing • API

Zazz is an American mobile app development company that specializes in architecting and maintaining digital solutions for a diverse range of clients, including VC-backed startups, government agencies, and Fortune 500 companies. With a team of over 275 engineers and designers, Zazz offers end-to-end services from product strategy to mobile app development and blockchain solutions. The company prides itself on leveraging the latest technologies and methodologies to deliver high-quality products and innovative solutions that help businesses grow and adapt in a digital-first world.

📋 Description

• Own end-to-end architecture for Rails applications and APIs serving connected device fleets • Design and lead IoT communication layers using MQTT, WebSockets, CoAP, or HTTP-based protocols • Architect high-volume telemetry ingestion, queuing, and real-time processing pipelines • Make build-vs-buy decisions on IoT platforms, message brokers, and data stores, and defend them to clients • Design schemas and scaling strategy for time-series and event-heavy workloads • Integrate cloud IoT services such as AWS IoT Core or Azure IoT Hub, including device provisioning, certificates, and OTA update flows • Lead code reviews, define engineering standards, and mentor mid-level and senior developers • Run technical discovery with clients and firmware or hardware teams, and translate that into scoped delivery plans • Diagnose production issues across device, network, and application layers

🎯 Requirements

• 8+ years of professional software engineering experience, with at least 6 years hands-on in Ruby on Rails • Proven track record of shipping and scaling IoT integrations in production • Deep experience with MQTT or equivalent device messaging protocols at scale • Strong API design skills, including versioning, contracts, and long-term maintainability • PostgreSQL or MySQL at scale, with real query and index optimization experience • Redis, Sidekiq, and distributed background job architecture • Solid testing discipline with RSpec or Minitest • Docker, CI/CD, and production deployment ownership • Experience leading a team or owning delivery on multiple concurrent projects • Good to have: time-series databases such as InfluxDB or TimescaleDB • Good to have: Kafka, RabbitMQ, or similar event streaming platforms • Good to have: exposure to edge gateways, embedded systems, or firmware collaboration • Good to have: working knowledge of Python, Go, or Node.js for device-side tooling • Good to have: infrastructure as code and cloud cost optimization on AWS or Azure • Good to have: prior agency or consulting experience with client-facing technical ownership

🏖️ Benefits

• No benefits, perks, or compensation extras specified