SalesJack

Senior Software Engineer

Toronto · Senior

Sponsorship not specifiedDetected 55 days ago

ReactNext.jsNode.jsFull-Stack DevelopmentCode ReviewPostgreSQLCI/CDTemporalRabbitMQJiraCRMCollaborationProblem Solving

About the role

As a Senior Full Stack Software Engineer at SalesJack, you'll be one of the senior technical hires on the team - owning major product surfaces end-to-end.
This is a hands-on role: writing production code daily, making the calls on what gets built and how it scales, and sweating the details of how it feels to use.
Strong opinions held loosely, fast iteration, and a bias toward shipping over deliberating.

Make the architectural calls on new systems - data model, API surface, frontend composition - and document the reasoning so the team can build on it
Build across our Node.js stack: Next.js on the frontend, Node services on the backend, BullMQ for background jobs and workflows, PostgreSQL as the system of record
Design and operate authentication, authorization, and multi-tenant RBAC systems that hold up under real customer load
Build durable, queue-driven automation with BullMQ - orchestrating long-running processes, retries, and integrations against external ERPs and third-party APIs
Mentor engineers and lead design reviews
Strong backend chops in Node.js - you've designed and operated services, not just built features inside them
Advanced PostgreSQL - schema design, query optimization, migrations under load, multi-tenant patterns
Technical Exercise: Product Design, Live coding and problem-solving session (~2.5 hours, might be 2 separate sessions)

8-10 years of full stack engineering experience, including time spent owning systems in production at meaningful scale
Deep expertise in React and Next.js, with a strong point of view on component architecture, state management, and performance
Production experience with auth/RBAC systems, especially in multi-tenant B2B contexts
Hands-on experience with BullMQ or comparable queue/job systems (Sidekiq, RabbitMQ, SQS, Temporal) - and a clear sense of when to reach for them vs. simpler patterns
You can be handed a fuzzy customer problem and come back with a scoped, shippable plan - not a Jira ticket asking for specs
Ability to make tradeoff calls - what to cut, what to defer, what to over-invest in - without needing a PM to break the tie

build tools that solve real problems for our customers and transform industry workflows.
Onsite in Toronto, ON
About SalesJack
SalesJack is a fast-growing, profitable sales software platform (CRM, Prospecting Service) purpose-built for independent businesses in the construction supply industry.
Our team and customers are spread across the US and Canada.
Own entire product features from "this is a problem worth solving" to "this is live in customers' hands" - scoping, designing, building, shipping, iterating
Talk to customers directly: discovery calls, support tickets, ride-alongs with sales reps in lumberyards. Use what you learn to make better product decisions
What We're Looking For:

This listing is sourced directly from SalesJack's careers page and normalized into a canonical job model.