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Javier Cortejoso

PROFILE

Javier Cortejoso

Over 11 months, this developer delivered robust CI/CD and backend improvements across projects like selfxyz/self and celo-org/op-geth. They optimized GitHub Actions workflows for circuit builds and iOS testing, reducing unnecessary runs and improving build reliability using YAML and Shell scripting. In celo-org/op-geth, they enhanced blockchain observability and stability by adding metrics, refining Docker deployment with envsubst, and fixing fee-balance error handling in Go. Their work included migrating CI to self-hosted runners, modernizing npm publishing, and updating network bootnode configurations. These efforts improved deployment consistency, resource efficiency, and operational reliability while maintaining strong documentation and community engagement practices.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

38Total
Bugs
2
Commits
38
Features
14
Lines of code
882,970
Activity Months11

Work History

June 2026

1 Commits • 1 Features

Jun 1, 2026

Monthly summary for 2026-06 focused on delivering business value through CI/CD optimization for the iOS testing pipeline in selfxyz/self. The main feature delivered was CI Workflow Optimization for iOS Testing Trigger Conditions, which gates CI jobs based on specific events and labels to optimize resource usage and ensure tests run under appropriate circumstances.

April 2026

1 Commits

Apr 1, 2026

April 2026 performance summary for celo-org/op-geth: Delivered a stability-focused fix to the GetFeeBalance path and expanded test coverage to harden fee-balance arithmetic under error conditions. This month’s work reduces production incidents, eliminates a nil-pointer risk in fee balance retrieval, and strengthens contract behavior in error scenarios across ERC20-fee flows.

February 2026

4 Commits • 2 Features

Feb 1, 2026

February 2026 (Month: 2026-02) — Delivery focus on CI/CD reliability and streamlined package publishing for selfxyz/self. Key outcomes include faster, more reliable circuit builds and safer, clearer npm publishing, enabling quicker releases with reduced risk. Highlights: CI/CD workflow improvements for circuit builds; publishing workflow modernization; environment and workflow optimizations; and cross-package workspace packaging. Impact: improved build stability, reduced resource usage, cost efficiency, and clearer release signals to stakeholders. Technologies demonstrated: GitHub Actions, YAML-based workflows, ubuntu-slim runners, NPM Trusted Publishers (OIDC), dry-run testing, version tagging, yarn workspaces, and workspace packaging.

January 2026

5 Commits • 2 Features

Jan 1, 2026

January 2026 monthly summary: Focused on CI/CD improvements and Docker deployment reliability across selfxyz/self and celo-org/op-geth. Key features delivered include conditional CI job execution for PRs on the dev branch, ensuring base branch is fetched for accurate diff checks, and extending build timeout to 12 hours to accommodate long-running builds in the selfxyz/self repository. In celo-org/op-geth, installed envsubst in the Docker Build Push workflow to enable environment variable substitution during builds, improving configuration flexibility and deployment consistency. These changes reduce unnecessary CI runs, increase build reliability, and enhance deployment predictability across environments.

December 2025

17 Commits • 2 Features

Dec 1, 2025

December 2025: Focused on stabilizing and accelerating delivery for selfxyz/self by modernizing the CI/CD pipeline, hardening security for private repositories, and improving test reliability. The month delivered a scalable foundation for future velocity while clearly increasing business value through faster, safer releases across platforms.

August 2025

1 Commits

Aug 1, 2025

August 2025 Monthly Summary for celo-org/optimism: Stabilized CI workflow for the contracts-bedrock-coverage job by implementing resource and network configuration improvements to run on the Celo node environment. The fix addresses a CircleCI configuration bug that previously prevented the coverage job from executing reliably. Result: more stable CI feedback and improved test coverage visibility.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025: Delivered a targeted network bootnode configuration update for the celo-org/docs project, aligning op-node run guidance with bootnode-based discovery for Alfajores and Baklava. This change minimizes manual peer maintenance and improves network reliability in development/test environments.

March 2025

1 Commits • 1 Features

Mar 1, 2025

March 2025 monthly summary for selfxyz/self: Delivered CI workflow routing optimization by updating the GitHub Actions workflow to route builds to a predefined set of self-hosted runners ('selfxyz-org'), enhancing build reliability and maintainability. This change supports faster feedback cycles and clearer ownership of CI resources.

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025 — Self-hosted runners migration for CI/CD in selfxyz/self. Focused on delivering a robust, reproducible build environment by migrating the artifacts build job to self-hosted organization runners, updating C++ and Node.js installation steps, and preserving Circom binary behavior. This work reduces reliance on GitHub-hosted runners and aligns CI with internal infra while maintaining compatibility with existing Circom workflows.

January 2025

1 Commits • 1 Features

Jan 1, 2025

January 2025 (2025-01) — op-geth (celo-org). Focused on configuration changes to support higher RPC transaction loads. Delivered a single feature: increase of the default RPCTxFeeCap from 1 to 1000 in the Celo configuration, aligning with network policy and future growth. No major bugs fixed this month. Impact: reduces RPC transaction failures due to fee cap, enabling higher-fee transactions when needed and improving RPC reliability for clients. Technologies/skills: configuration management, change traceability via commit-based workflow, governance-aligned Go-Ethereum (op-geth) configuration changes.

September 2024

5 Commits • 3 Features

Sep 1, 2024

Monthly summary for 2024-09 focusing on key features delivered, major bugs fixed, overall impact, and technologies demonstrated. Delivered 16 MB MaxFrameLen for EigenDA to support larger data transactions, added robust blockchain performance metrics for observability and cost visibility, and maintained strong cross-repo collaboration to ensure consistency and faster validation. Key outcomes include improved data throughput for EigenDA data transactions, enhanced operational insights through new metrics, and robust nil-value handling in metrics collection to prevent outages or misleading dashboards. These changes align with updated documentation and testing results, enabling more reliable performance tuning and cost optimization across the stack. This month reinforced business value through faster data processing, better visibility into blockchain performance, and a scalable instrumentation footprint that supports future optimizations across optimism-era tooling.

Activity

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Quality Metrics

Correctness94.6%
Maintainability91.6%
Architecture91.6%
Performance91.6%
AI Usage23.2%

Skills & Technologies

Programming Languages

GoJSONJavaScriptMarkdownShellTypeScriptYAML

Technical Skills

CI/CDConfiguration ManagementContinuous IntegrationDevOpsDockerDocumentationGitGitHub ActionsGoGo programmingJavaJavaScriptMobile DevelopmentNPMNode.js

Repositories Contributed To

5 repos

Overview of all repositories you've contributed to across your timeline

selfxyz/self

Feb 2025 Jun 2026
6 Months active

Languages Used

ShellYAMLJavaScriptMarkdownTypeScriptJSON

Technical Skills

CI/CDGitHub ActionsShell ScriptingContinuous IntegrationDevOpsJava

celo-org/op-geth

Sep 2024 Apr 2026
4 Months active

Languages Used

GoYAML

Technical Skills

Go programmingblockchain developmentConfiguration ManagementCI/CDDevOpsDocker

celo-org/optimism

Sep 2024 Aug 2025
2 Months active

Languages Used

GoYAML

Technical Skills

Gobackend developmentCI/CDDevOps

EspressoSystems/optimism-espresso-integration

Sep 2024 Sep 2024
1 Month active

Languages Used

Go

Technical Skills

Gobackend development

celo-org/docs

Apr 2025 Apr 2025
1 Month active

Languages Used

Markdown

Technical Skills

Documentation