Case studies

Software engineering case studies, measured in uptime, latency and load.

Selected work in healthcare, security, HRTech, retail and AI: the problem, what we changed and the measurable result.

Healthcare · Platform re-architecture

Patient scheduling: ~100 on-premise installs moved to a multi-tenant cloud.

A patient-management system with booking and SMS/email notifications ran as ~100 separate on-premise installs, costly to update and impossible to scale. We moved it to a multi-tenant AWS platform with a database per clinic, automated the migration, and later deployed it across multiple zones for expansion into new countries.

  • AWS
  • EC2
  • RDS
  • SQS
  • Multi-tenant
  • GDPR
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99.99%
availability on critical workloads
Healthcare · AI document processing

Medical documents from scans, PDFs and free text, standardized with an LLM.

Lab results, discharge summaries and doctors' orders arrived as scans, PDFs and free text, in a different format and language from every laboratory. A mid-size LLM, chosen for speed and quality per cost, ran inside the client's AWS account and normalized them to LOINC at ~5,000 documents a month. A second, stronger model cross-checked every result, and any mismatch went to manual review and stayed out of the data until resolved. The structured data now powers patient analytics, test-history comparison and trend detection.

  • LLM
  • LOINC
  • AWS
  • LLM evaluation
  • Data normalization
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>95%
extraction accuracy on our evaluation bench
Healthcare · Telemedicine platform

In-house WebRTC telemedicine for an offline clinic, integrated with its internal software.

An offline clinic needed online video consultations without depending on a third-party video provider for patient care. We built the WebRTC layer ourselves, with web and mobile clients, appointment booking and a patient portal integrated with the clinic's internal registration system. The doctor can switch a call to audio-only. Consultations are recorded for quality improvement, stored on AWS S3 and handled under the privacy policy and user consent. The clinic grew its consultation volume and can now bring in doctors remotely, without a visit to the clinic.

  • WebRTC
  • Web
  • Mobile
  • AWS S3
  • Privacy by design
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Up to 30
concurrent video consultations
Healthcare · Systems integration

Two-way data exchange with laboratories and insurers that survives third-party outages.

The platform had to exchange test results and appointment records with laboratories and insurers, each with its own API and data model. We built integrations over FHIR and the providers' custom APIs, and made delivery reliable when a partner system goes down: SQS with a retry mechanism and the Transactional Outbox pattern, over secured connections. A mapping layer translates between provider formats, and integrations automated processes that were manual before.

  • FHIR
  • SQS
  • Transactional Outbox
  • Retries
  • Data mapping
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