Senior .Net/C# Developer with Python

Programmers.io; Burnaby; On-site; CAD 100,000 - 150,000; Full time

Job summary

Programmers.io is seeking an experienced backend engineer to build scalable services in .NET 8/C#, Python with FastAPI and data tooling. You will help decompose a Rails monolith into microservices, define API contracts, and optimize data flows across billing, dispatch, and reporting modules.

You’ll own high-load MySQL schemas, orchestrate Docker/Kubernetes deployments on GKE, and collaborate with Rails, DevOps, and QA to push robust architectures forward.

Qualifications

• Production experience with .NET 8 / C# and Python
• Strong MySQL query design and optimization for high-load workloads
• Experience with at least one of PostgreSQL, Elasticsearch, MongoDB, BigQuery
• Experience with RabbitMQ or similar brokers and async queues
• Designing and implementing microservices with clear API boundaries
• Redis for caching and session management, Git/GitFlow with Bitbucket

Responsibilities

• Build and maintain backend services in .NET 8/C# and Python
• Design microservice boundaries, API contracts, and data flows
• Work on core platform systems (GPS ingestion, history, reporting, billing)
• Write production-grade, test-driven code and conduct reviews
• Design and optimize MySQL schemas for high-volume data
• Build and consume RESTful APIs; implement webhooks and events
• Deploy to production via Docker, Kubernetes, and Bitbucket Pipelines
• Create architecture diagrams and ADRs in Confluence
• Manage async jobs with RabbitMQ and Dramatiq/Delayd Job tools
• Operate on Google Cloud Platform (GKE, Cloud SQL, BigQuery)

Skills

.NET 8 / C#

Python

FastAPI

Microservices

MySQL

Redis

RabbitMQ

Kubernetes

BitBucket

GitFlow

Docker

BigQuery

Tools

Docker

Kubernetes

Bitbucket Pipelines

Confluence

Jira

GitFlow

Job description

• 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 BitBucket 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, BigQuery
• Collaborate with the Rails team, DevOps, 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 GitFlow 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, BigQuery
• 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/GitFlow branching workflow and BitBucket or similar platforms
• Ability to write clear technical documentation and communicate tradeoffs to both engineers and non-technical stakeholders