// Work
Every engagement below came down to the same thing: something in the middle of the system was slow, expensive or unreliable, and it had to be fixed without stopping the business using it.
Replaced request-time REST fan-out with availability combinations resolved against a pre-computed hash table, re-using precalculated day-availability hashes across 160 suppliers.
Migrated the REST microservice behind availability for 160 suppliers from SQL Server to PostgreSQL with ElastiCache (Redis) for high-volume data, and moved the inventory cache layer onto DynamoDB as the single source of truth for every downstream search system.
Held integrations steady under high load with a Redis-backed distributed semaphore — a token bucket with slot limits — plus Polly retry policies for resilience and rate limiting with Nginx.
Designed a Databricks and .NET microservice pipeline that auto-queries suppliers on an event-driven architecture, closing the availability gaps that manual refresh cycles kept leaving open.
Delivered REST microservices for contract signing across the DACH region, plus greenfield transfer services using choreography for life insurance, property insurance and pension scheme modules.
Built the backward-compatible migration that moved every step from document generation to digital contract signing onto a new workflow, with eDocBox integrated for digital signatures — so the platform stayed stable for brokers throughout.
// Get in touch
Crisify is taking on new engagements — audits, embedded work and advisory, remote across the EU.
No obligation · Response within 24 hours
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