Ondra Pelech

About

I'm an experienced software engineer, passionate about typed functional programming and Scala in particular. I specialize in pure FP libraries from the TypeLevel organization (Cats, Cats Effect, fs2, Doobie, http4s, ...) and ZIO and have helped to design, build and maintain many systems using these technologies. I have also made several contributions to (not only) these Free Open Source libraries/tools, fixing bugs, making improvements or adding new features. I'm well versed in the latest best practices in the field of software engineering regarding Continuous Integration, Infrastructure as Code and DevOps and have experience with popular technologies like Kubernetes, PostgreSQL, Kafka, OpenAPI, Redis, GCP, gRPC/Protobuf or RabbitMQ.

Experience

• Staff Scala Software Engineer at Chili Piper
  Sep 2022 - Present · 3 yrs 10 mos

  The back-end team. Scala, functional programming, Typelevel libraries (Cats Effect, fs2, fs2-kafka, http4s, Doobie, & other), tAPIr, sbt, OpenAPI, Google Cloud Platform micro-services, Postgres, Kubernetes, Redis, Kafka, TestContainers, GitHub, GitHub Actions, cdk8s Claude Code for scaling up coding across the company codebase. Authentication, Keycloak, OAuth 2.0, OpenID Connect, SAML, SCIM User authentication, management and automated provisioning, license management, billing, integration with 3rd party services (Google, Microsoft, Salesforce, Slack, etc.) Exposing functionality to customers for AI integration via MCP and a purpose-built command-line tool (as an alternative to MCP).

• Senior Scala Developer at Avast
  Feb 2019 - Jun 2022 · 3 yrs 5 mos

  Internal Threat lab information systems. Scala, Typelevel libraries (Cats Effect, fs2, http4s, Doobie, & other), sbt, gRPC/Protobuf, OpenAPI, Postgres, Kubernetes, RabbitMQ, Redis, Kafka, Teamcity, Kotlin, TestContainers, GitHub and a little bit of Rust

• Barclays Investment Bank (3 yrs 5 mos)
  • Senior Scala Developer
    Mar 2018 - Jan 2019 · 11 mos

    Risk, Finance and Treasury Treasury Model execution engine -- modelling of data, execution of models, report generation Scala, Spark, Impala, Hive, Akka, sbt, ScalaZ, git, TeamCity

  • F# Developer
    Sep 2015 - Feb 2018 · 2 yrs 6 mos

    Risk and Analytics Market Object and Static Service; multi-process service with graph-based engines that construct market objects and can apply scenario based shocks (US FED CCAR, FRTB); integration of C++ quant library F#, C#, PowerShell, PSake, BitBucket git, TeamCity, Nancy, Akka.NET / WCF

• C Developer at CS SOFT a.s.
  Aug 2014 - Feb 2015 · 7 mos

  development of Air traffic management software system C89, Oracle Pro*C, Bash, glib, Oracle SQL, hg

• C Developer at CS SOFT a.s.
  Jul 2013 - Jan 2014 · 7 mos

  development of Air traffic management software system C89, Oracle Pro*C, Bash, glib, Oracle SQL, hg