Rowan Ellis
Junior Software Engineer
Calder Telemetry Systems
Dear Hiring Team,
I am writing to apply for the Software Engineer position at Calder Telemetry Systems. With hands-on experience developing backend microservices, refining automated test suites, and integrating asynchronous message queues, I am enthusiastic about contributing to your team's fleet data engineering initiatives.
In my current role as a Junior Software Engineer at Pennine Mobility Technologies, I develop and maintain backend RESTful services using Python and FastAPI to support vehicle telemetry routing across regional dispatch systems. To maintain reliability across these distributed services, I implement automated unit and integration tests with pytest, which expanded our microservice test coverage from 68% to 84%. I also routinely diagnose logging bottlenecks through PostgreSQL query analysis and Dockerized staging environments to ensure steady throughput.
Alongside everyday API maintenance, I collaborated with senior engineers to migrate legacy batch data pipelines to asynchronous Celery workers backed by RabbitMQ, improving background processing efficiency. Earlier in my time with Pennine Mobility Technologies as a Graduate Software Developer, I automated continuous integration checks using GitHub Actions, reducing developer build turnaround time by 15 minutes and supporting more reliable release cycles.
Calder Telemetry Systems' work in high-volume telemetry and reliable data delivery aligns closely with my backend development background and testing practices. I welcome the opportunity to discuss how my technical skills and collaborative experience can support your engineering objectives. Thank you for your time and consideration.
Yours sincerely,
Rowan Ellis