Senior Staff Engineer — Full-Stack, Solution Architecture About the role Our client is building an AI-centric engineering platform where brands operate as self-reliant, B2B-style customers.

You will own product features end-to-end across the full stack — leveraging AI agents to multiply delivery throughput — while architecting robust, highly-available systems on a stable, brand-agnostic platform.

This is a full-time IN-OFFICE position in Toronto.

What you will do: • Own delivery of product features end-to-end: design, build, verify against acceptance criteria, and ship to production. • Build and operate 3rd-party and B2B integrations on the platform, delivering brand- and customer-specific features on top of a shared core. • Use AI coding agents and automated verification to accelerate delivery, working within engineering quality gates and independent review. • Set technical patterns and unblock yourself and others across a quick-moving, multi-workstream environment.

Must-haves — technical: • Full-stack, production-grade.

Senior/staff experience building software end-to-end: .NET / C# REST APIs and Next.js / React front-ends with server-side rendering and real-time streaming (Server-Sent Events). • Architecture at scale.

Proven design and operation of highly-available, high-throughput systems. • Data.

Hands-on with MongoDB, Redis (sessions, caching, sorted-set/leaderboard patterns) and PostgreSQL; chooses the right store per workload. • Event-driven systems.

Building producers/consumers on an event hub / Apache Kafka; event-schema design and real-time aggregations. • 3rd-party and B2B integrations.

Designing and delivering integrations against external and game-provider APIs, and building brand-/customer-specific capabilities on a stable, brand-agnostic platform.



• API security. OAuth-based auth, request signing (HMAC), idempotency, replay protection, and audit logging. • AI-assisted delivery.

Demonstrated use of AI coding agents/tooling to multiply throughput, and fluency working within automated verification (testing against acceptance criteria, regression, edge cases). • Hands-on production monitoring.

Operating production monitoring and issue triage (Sentry or equivalent); treats observability and CI/CD as part of “done.” Must-haves — delivery & ownership • Proven track record of delivering robust solutions within tight, fixed timeframes — quality and speed together, not one at the expense of the other. • Handles competing priorities across multiple workstreams without dropping commitments. • End-to-end ownership of deliverables, from an ambiguous problem statement through to production. • A can-do operator who embraces uncertainty and figures things out as they go — self-sufficient, decisive with incomplete information, and escalates judiciously rather than by default.

Benefits • Exposure to cutting-edge AI and automation technology that is actively transforming how marketing and operations are run at scale • Genuinely interesting projects with modern tooling, and the freedom to bring your own ideas to the table • A collaborative, high-performance culture where ambition, accountability, and innovation are valued and rewarded • Clear paths for development, progression, and advancement as the business scales • A competitive salary plus discretionary bonus • Comprehensive health benefits, including extended healthcare, dental, and vision coverage. • On-site leisure facilities to switch off and recharge during the day. • Fantastic company events • On-site leisure facilities and on-site parking

📌 Sr Staff Engineer - Full Stack (Toronto)
🏢 Futuretek
📍 Toronto