CoderPad
Technical interview platform
Dev ToolsSaaS2025
Senior Software Engineer
Context
CoderPad is where technical interviews happen: two people write and run code at the same time, across dozens of languages. If the editor fails, the interview falls apart.
The challenge
The session has to feel instant and survive reconnections, language switches and long-running executions.
What it does
- Live coding interviews
- Asynchronous technical assessments
- Multi-language code execution
What I did
- Product feature development on the assessment and live interview platform.
- Backend services behind the sessions and code execution.
Stack
- Ruby on Rails
- ActiveRecordActiveJobRSpec
- JavaScript
- ReactTypeScript
- Data
- PostgreSQLRedis
- Infrastructure
- DockerCI/CD
Services practised here
- Backend Architecture & APIsYour product ends up with a backend that survives growth: services with clear boundaries, documented APIs and a data model built for the queries that actually run.
- Platforms & Distributed SystemsWhen a product grows, the problem stops being a feature and becomes how the services talk to each other. That is where service boundaries, event delivery and flows that cannot be lost along the way come in.
- Cloud, DevOps & IaCInfrastructure ends up described as code and deployment automated, so shipping to production is routine and anyone on the team can do it.