Position: Senior Backend Engineer, API

Location: Greater Toronto Area, Canada

Type: Full-Time

Team: Backend Engineering

Key Responsibilities:

• Design and implement scalable, low latency, high throughput backend services using Golang, ensuring a strong focus on the end-user experience.
• Work extensively with AWS cloud services, leveraging CloudFormation and other technologies to build user-focused solutions
• API Versioning & Lifecycle Management: Define versioning strategies (URI/header); plan and execute major/minor releases; communicate deprecation schedules.
• API Gateway & Security: Configure and operate our API gateway (e.g., AWS API Gateway, Kong); enforce authentication/authorization (OAuth 2.0, JWT); manage API keys, usage plans, and rate limits.
• Documentation & Developer Experience: Author, maintain, and publish OpenAPI/Swagger and GraphQL specs; build and enhance our developer portal (Mintlify); provide code samples and SDK generation.
• Governance & Standards: Establish API style guides, design patterns, and automated validation (linting, contract tests).
• Monitoring & SLAs: Instrument APIs with metrics and tracing (OpenTelemetry, AWS X-Ray); define SLAs; build dashboards and alerting around latency, error rates, and usage.
• Collaboration & Mentorship: Partner with frontend teams, and external integrators such as market makers.
• Continuously review and optimize our API platform for performance, reliability, and usability.

Qualifications:

• 5+ years in API‐first development, with a track record of shipping versioned public or partner-facing APIs.
• Strong proficiency in Golang and experience with AWS services.
• Hands-on with OpenAPI and documentation toolchains.
• Experience operating an API gateway (AWS API Gateway), including security (OAuth 2.0, JWT) and usage management (throttling, quotas).
• Familiarity with developer portals, self-service onboarding flows, and API key management.
• Strong understanding of monitoring, tracing, and alerting tools for APIs (e.g., Prometheus, Grafana).
• Excellent communication skills and a passion for creating great developer experiences.

What We Offer:

• An opportunity to work on projects that prioritize user experience and performance.
• A dynamic and innovative work environment with a focus on learning and user-centric development.
• Competitive compensation and benefits, with opportunities for professional growth.
• A collaborative and supportive team culture.