Senior Backend Engineer: NestJS, TS/Node, Kafka & MongoDB

Astra-North Infoteck Inc. ~ Conquering today’s challenges, achieving tomorrow’s vision!; Toronto; Hybrid; CAD 120,000 - 190,000; Full time

Job summary

Astra-North Infoteck Inc. in Toronto, ON is seeking a Senior Software Engineer to help modernize a legacy platform into a cloud-native architecture using NX monorepo, NestJS services, and Kafka/MongoDB.

This hands-on role offers architecture influence across BFF, microservices, ingestors, and workers, with a strong emphasis on testing, observability, performance, and reliability. Candidates should have 8+ years of backend experience and deep TypeScript/Node.js skills, working in a hybrid setup

Qualifications

• 5-10 years backend engineering experience.
• Hands-on NestJS with modules, DI, guards, interceptors, pipes, validation, Swagger/OpenAPI.
• Experience with NX monorepos and shared libs.
• Advanced TypeScript/Node.js skills and API/event contract design.
• Experience with event-driven systems (Kafka) including retries, idempotency, and schema evolution.
• Experience building BFF/API orchestration layers.

Responsibilities

• Build and scale services within a single NX monorepo using shared libraries and dependency-aware CI/CD.
• Develop and evolve a NestJS BFF Gateway for multiple frontends including JWT validation and OBO token exchange with Azure Entra ID.
• Implement internal NestJS microservices with clear domain ownership and independent deployment.
• Build ingestion services that consume external events, transform payloads, persist operational data and publish internal domain events.
• Develop async workers that process internal events for side effects (notifications, indexing, jobs) without tight service coupling.
• Contribute to data-layer design: MongoDB for operational reads, Snowflake for analytics.
• Create and maintain shared libs/contracts (DTOs, event payloads, auth utilities, API clients, validation rules).
• Ensure strong testing, observability, performance, and production reliability standards.

Skills

NestJS

TypeScript

Node.js

Kafka

MongoDB

NX monorepo

API design

Event-driven

BFF orchestration

Tools

NX Monorepos

Swagger/OpenAPI

Azure Entra ID

OAuth/OBO

Kubernetes/OpenShift

Job description

Astra-North Infoteck Inc. in Toronto, ON is seeking a Senior Software Engineer to help modernize a legacy platform into a cloud-native architecture using NX monorepo, NestJS services, and Kafka/MongoDB.

This hands-on role offers architecture influence across BFF, microservices, ingestors, and workers, with a strong emphasis on testing, observability, performance, and reliability. Candidates should have 8+ years of backend experience and deep TypeScript/Node.js skills, working in a hybrid setup