Ian S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I help engineering teams build, scale, and stabilize backend and data systems using Scala, Apache Spark, and Kafka. With 10+ years of experience, I can take ownership from architecture through production. I can help you with: - Scala and Java backend services - Spark pipelines and large-scale data processing - Kafka and event-driven architectures - REST and GraphQL API development - Performance, reliability, and scalability improvements - Microservices, Docker, AWS ECS, and CI/CD - Existing-system debugging and technical modernization You’ll get maintainable, well-tested software, direct communication, and pragmatic technical decisions Send me your architecture, bottleneck, or project brief. I’ll tell you candidly whether I’m a good fit and how I would approach it. Technologies and platforms I am proficient in include Scala, Play Framework, Akka, RDBMS, NoSQL, ZIO, HTTP4S, Cats Effect, Monix, Kafka, AWS, Apache Spark, RAG, Gen AI, LLMs, Claude, Codex, Health tech: FHIR, HL7, Cerner, and Functional Programming.