Senior Backend Engineer, .NET & Python

Posi Trace builds a real-time GPS fleet tracking SaaS platform -- vehicle location, telemetry processing, reporting, dispatching, and fleet management tools for SMB and enterprise customers across Canada and Mexico. Our backend processes millions of GPS data points daily across multiple receiver protocols.

We’re migrating toward MACH (Microservices, API-first, Cloud-native, Headless) and need a senior backend engineer to co-own that evolution.

This is a full-time, on-site position at our Burnaby, BC headquarters. Not available for remote or hybrid.

What You’ll Do

Build and maintain backend services in .NET 8 / C# and Python (FastAPI, Dramatiq workers, Dask data pipelines)

Design microservice boundaries, API contracts, and data flows as we decompose a monolithic Rails application into independent services

Work directly on core platform systems: GPS telemetry ingestion, history processing, reporting engine, dispatching services, billing and subscription management

Write and review production-grade, test-driven code; enforce quality through code reviews across .NET and Python codebases

Design and optimize MySQL queries and schemas for high-volume transactional workloads (10M+ row tables, complex joins across billing/device/contract hierarchies)

Build and consume RESTful APIs; design webhook delivery systems and event-driven integrations

Deploy to production via Bit Bucket Pipelines, Docker, and Kubernetes (GKE) with zero-downtime rolling updates

Produce architecture documentation: system diagrams, data flow diagrams, ADRs in Confluence

Manage async job processing with RabbitMQ and Dramatiq/Delayed Job workers

Operate within Google Cloud Platform: GKE, Cloud SQL, Cloud Storage, Secret Manager, Big Query

Collaborate with the Rails team, Dev Ops, and QA; work with the Engineering Team Lead and VP of Engineering on technical direction

Estimate tasks, communicate blockers, and participate in sprint planning using Jira and Git Flow branching

What You Bring

Production experience with .NET 8 / C# -- building, testing, and deploying backend services

Production experience with Python -- FastAPI or Flask, async task processing, data manipulation (Pandas, Dask)

Strong MySQL skills: query optimization, indexing strategies, schema design for high-load systems

Experience with at least one of:
PostgreSQL, Elasticsearch, MongoDB, Big Query

Hands-on Docker + Kubernetes (GKE preferred): writing Dockerfiles, managing deployments, debugging pod issues, reading container logs

Experience with RabbitMQ or similar message brokers and async job queues

Track record of designing and implementing microservices -- service decomposition, inter-service communication, API versioning, backward compatibility

Familiarity with Redis for caching and session management

Experience with Git/Git Flow branching workflow and Bit Bucket or similar platforms

Ability to write clear technical documentation and communicate tradeoffs to both engineers and non-technical stakeholders

Strong written and spoken English

What Sets You Apart

Experience with Ruby on Rails; understanding Rails conventions and Active Record is critical for designing migration paths

Experience with Go

MongoDB experience

Experience with Elixir

Background in IoT / telematics: GPS device protocols, high-throughput telemetry ingestion, real-time data pipelines

Experience with AI/ML integration: MCP servers, LLM API orchestration

Web Socket experience for real-time data delivery

Experience with Angular frontend; helpful for full-stack debugging

SOC2 compliance experience

Monitoring and observability:
Zabbix, Gray Log, GCP Cloud Monitoring

API documentation practices (Swagger/OpenAPI)

What We Offer

On-site, full-time at our Burnaby headquarters -- no remote, no hybrid

Salary: CA $110,000 -- CA $145,000/year based on experience

Direct architectural impact on a multi-service SaaS platform processing real-time GPS data at scale

State-of-the-art hardware, Jet Brains licenses (Rider, PyCharm, Ruby Mine)

Paid vacation, holidays, and sick days

Benefits program

Architect-track career progression

Work across the full stack: .NET microservices, Python data pipelines, Rails, GKE infrastructure

Individualized development plan and continuous learning opportunities

We welcome all qualified applicants, prioritizing skill and character. Let’s talk.

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