Sergen Yalçın
Senior Software Engineer at Upbound
Istanbul, Istanbul, Turkey
Summary
👤
Senior🎓
Top SchoolSergen Yalçın is a Senior Software Engineer based in Istanbul with seven years of experience building cloud-native backend systems, Kubernetes controllers, and developer tooling. Currently at Upbound, he contributes to Crossplane and its provider ecosystem—authoring Go-based K8s controllers, code-generation pipelines, CI/CD workflows, and cloud provider integrations for AWS/GCP/Azure. He brings hands-on expertise in software supply chain security (SBOM, package signing, CVE scanning) and has a track record of shipping reliable infrastructure automation used by multi‑national teams. Prior work at SAP involved operator tooling, diagnostics, and lifecycle automation for Kubernetes environments, reflecting deep operational experience across EKS/GKE/AKS. An active contributor to the crossplane-contrib AWS provider, Sergen combines pragmatic engineering with an emphasis on reproducible builds and maintainable infrastructure-as-code.
7 years of coding experience
5 years of employment as a software developer
Bachelor's degree, Computer Science, GPA: 3.32, Bachelor's degree, Computer Science, GPA: 3.32 at Marmara Üniversitesi
Turkish, İngilizce
Github Skills (11)
terraformer10
cloud-infrastructure10
cloud-services10
aws10
ias10
terraform10
go9
api8
apidoc8
kubernetes-pods7
kubernetes7
Programming languages (3)
Github contributions (5)
crossplane-contrib/provider-upjet-aws
Jun 2022 - Feb 2023
AWS Provider for Crossplane.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 releases, 227 reviews, 83 commits in 8 months
Contributions summary:The user, Sergen Yalçın, primarily contributed to the backend aspects of the AWS provider for Crossplane. His commits focus on configuring various resources such as IAM groups, KMS resources, lambda functions, OpenSearch domains, and other services within the AWS ecosystem. He also addressed review comments and resolved conflicts within the codebase, indicating his involvement in code maintenance and collaboration. His work involved modifying Terraform configurations, and resolving reference issues demonstrating a good understanding of the project's structure.
providerterraform-modulesterraformawsterraform-module
sergenyalcin/official-provider-gcp
Oct 2022 - Mar 2025
Official GCP Provider for Crossplane by Upbound.
Contributions:3 PRs, 23 pushes, 44 branches in 2 years 5 months
gcpprovidergoogle-cloud-platformgoogle-cloudcrossplane
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