Backend Developer – TypeScript/Node.js, NestJS & Kafka

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

Senior Software Engineer – NX, NestJS, TypeScript/Node.js, Kafka & MongoDB

Toronto, ON - Hybrid (4 Days WFO)

Experience: 8+ years in software engineering| with strong hands-on experience in TypeScript/Node.js| NestJS| and NX monorepo delivery

Role Summary

We are hiring a senior engineer to help deliver the AVA Modernization program| moving a legacy platform to a cloud-native architecture using NX monorepo| NestJS services| event-driven integration| and MongoDB/Snowflake data patterns. This is a hands‑on role with architecture influence across BFF| microservices| ingestors| and workers.

Key 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/current-state reads
• Snowflake for analytical/reporting workloads
• Create and maintain shared libs/ contracts (DTOs| event payloads| auth utilities| API clients| validation rules).
• Ensure strong testing| observability| performance| and production reliability standards.

Required Qualifications

• 5-10 years of backend engineering experience.
• Strong hands‑on expertise with NestJS (modules| DI| guards| interceptors| pipes| validation| Swagger/OpenAPI).
• Practical experience with NX monorepos (shared libs| dependency graph| affected builds/tests).
• Advanced TypeScript/Node.js skills and API/event contract design.
• Experience with event-driven systems (Kafka or equivalent)| including retries| idempotency| and schema/version evolution.
• Experience building BFF/API orchestration layers across multiple upstream services.
• Solid MongoDB experience for low-latency operational workloads.
• Strong communication and collaboration skills in cross‑functional delivery teams.

Preferred Qualifications

• Ability to navigate and analyze C# and/or Java codebases at a working level a significant portion of source-of-truth analysis will involve reading and interpreting existing legacy code in these languages to understand current business logic and inform how it should be reshaped to fit the new architecture.
• Experience with Azure Entra ID and OAuth/OBO flows.
• Exposure to GraphQL supergraph integrations from BFF layers.
• Snowflake or similar analytical platform experience.
• Experience migrating legacy services to containerized/cloud-native architectures.
• Kubernetes/OpenShift delivery exposure.