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A double-entry payment ledger with an event-driven outbox, an idempotent consumer, and a dead-letter queue. Kafka and Redis run alongside the app, Postgres is managed.
KotlinSpring BootKafkaPostgres
syntagmata.com
I'm Jessica Templet, solo builder at Templet Solutions. JD, self-taught engineer, occasional geometer. Everything below is deployed and reachable right now, not a screenshot of something that used to work.
A project manager that also tracks issues, not the other way around. Built to stay low bloat instead of turning into another Jira.
Graph neural network PDE solvers for computational fluid dynamics. The dashboard shows real validation output, including the fix for a spectral radius blow-up in autoregressive rollouts.
A double-entry payment ledger with an event-driven outbox, an idempotent consumer, and a dead-letter queue. Kafka and Redis run alongside the app, Postgres is managed.
A real-time feature flag and configuration engine. Single binary, embedded UI, nothing else to run.
An enterprise identity gateway speaking SAML, OIDC, SCIM, and ABAC to each other, against a working demo tenant.
A local-first OAuth 2.1 and OIDC authorization server, small enough to run as a sidecar next to whatever actually needs the auth.
Flags categorical slices of a dataset where the trend reverses against the overall trend, the shape Simpson's paradox leaves behind.
A local-first document vault. Desktop only, so this one gets a walkthrough video instead of a link once it's recorded.
Diagnoses and fixes cross-cloud network conflicts: overlapping CIDR ranges, inconsistent private networking, DNS resolving differently across AWS, GCP, and Azure. Built alone, under production pressure, to fix a real outage.
Detects instructions embedded in content headed for an LLM or agent, and traces where they actually came from before anything acts on them.