Job Description Senior Software Engineer NX, NestJS, Type

Script/Node.js, Kafka & MongoDB Toronto, ON - Hybrid (4 Days WFO) Experience: 8+ years in software engineering| with strong hands-on experience in Type

Script/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 Type

Script/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/Open

Shift delivery exposure.

Requirements Top 3 Required Skills: 1. IBM Financial transaction 2.

Payment flow 3.

Support Modernization Detailed Job Description: Design, develop, and maintain applications built on IBM Financial Transaction Manager (FTM) to support core payments processing.

Contribute to the development of payment flows supporting transaction processing.

Build and support integrations between FTM and upstream/downstream systems using enterprise integration patterns.

Participate in the design, development, testing, deployment, and production support.

Troubleshoot and resolve application and integration issues in a complex, regulated setting.

Collaborate with architecture, QA, and operations teams to ensure platform stability, scalability, and performance.

Support modernization initiatives and enhancements to existing payment hub capabilities.

Produce explicit technical documentation and participate in code reviews and knowledge sharing.

📌 Backend Developer – TypeScript/Node.js, NestJS & Kafka (Toronto)
🏢 Astra North Infoteck
📍 Toronto