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Crystal Developer — Fast Compiled Backends and APIs
Service description
I am a backend developer who works in Crystal, and I chose it on purpose. Crystal gives me the clean, expressive syntax that feels close to Ruby, but it compiles down to a native binary with performance that sits near C. For you that means services that start instantly, hold a small memory footprint, and handle heavy traffic without the runtime overhead you get from interpreted languages. This is not Ruby and it is not Go: it is a statically typed, compiled language with type inference, so the compiler catches whole classes of errors before your code ever reaches production, while I still keep the readable, elegant style that makes the codebase pleasant to maintain.
My work usually revolves around HTTP APIs, JSON services, and long-running background workers. I design the data models, wire up the database layer, add authentication and validation, and make sure every endpoint is covered by tests. Crystal's fibers and channels let me build concurrent request handling that stays simple to reason about, so I can push a lot of throughput through a single lean process. When you have an existing service that has become slow or expensive to run, I can rewrite the hot path in Crystal and keep the external contract identical, so nothing downstream breaks.
Beyond writing the code, I care about how it ships and how it behaves under load. I containerize the binary, set up sensible logging and health checks, and profile the service so we know exactly where the time goes. I document the API and the build steps clearly, so your team can keep moving after I hand things over. If you want raw speed without giving up a language that people actually enjoy reading, Crystal is a strong fit and I can help you get there.
— Compiled HTTP APIs and JSON backend services in Crystal
— Static typing with type inference to catch bugs at compile time
— Concurrency with fibers and channels for high throughput
— Database integration, migrations, and query layers
— Authentication, validation, and endpoint test coverage
— Rewriting slow interpreted services into fast Crystal binaries
— Docker packaging, logging, health checks, and profiling
My work usually revolves around HTTP APIs, JSON services, and long-running background workers. I design the data models, wire up the database layer, add authentication and validation, and make sure every endpoint is covered by tests. Crystal's fibers and channels let me build concurrent request handling that stays simple to reason about, so I can push a lot of throughput through a single lean process. When you have an existing service that has become slow or expensive to run, I can rewrite the hot path in Crystal and keep the external contract identical, so nothing downstream breaks.
Beyond writing the code, I care about how it ships and how it behaves under load. I containerize the binary, set up sensible logging and health checks, and profile the service so we know exactly where the time goes. I document the API and the build steps clearly, so your team can keep moving after I hand things over. If you want raw speed without giving up a language that people actually enjoy reading, Crystal is a strong fit and I can help you get there.
— Compiled HTTP APIs and JSON backend services in Crystal
— Static typing with type inference to catch bugs at compile time
— Concurrency with fibers and channels for high throughput
— Database integration, migrations, and query layers
— Authentication, validation, and endpoint test coverage
— Rewriting slow interpreted services into fast Crystal binaries
— Docker packaging, logging, health checks, and profiling
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