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Cian Hatton

PROFILE

Cian Hatton

Over seven months, Qpeyb engineered robust backend and testing infrastructure across the celestiaorg/celestia-app, rollkit/rollkit, and related repositories. They developed modular gRPC server modes, Docker-based end-to-end testing frameworks, and cross-chain interoperability features, focusing on deployment flexibility and upgrade safety. Using Go, Docker, and CI/CD pipelines, Qpeyb refactored build systems, stabilized integration tests, and enhanced migration and data availability layers. Their work included modernizing test frameworks with Tastora, enabling multi-node migrations, and supporting IBC token transfers. This depth of engineering improved release reliability, reduced integration risk, and accelerated feedback cycles, demonstrating strong backend, DevOps, and blockchain development expertise.

Overall Statistics

Feature vs Bugs

83%Features

Repository Contributions

48Total
Bugs
5
Commits
48
Features
25
Lines of code
27,632
Activity Months7

Work History

October 2025

7 Commits • 5 Features

Oct 1, 2025

October 2025 highlights: Delivered core migration, testing, and upgrade readiness across multiple repos, with a focus on safer multi-node migrations, stronger interop, and robust upgrade validation. Key outcomes include migration framework enhancements, improved P2P testing, cross-chain transfer enablement, modernized testing infrastructure with Tastora, and end-to-end EVM upgrade integrity tests. These changes reduce rollout risk, increase chain stability, and expand interoperability for cross-chain use cases.

September 2025

6 Commits • 5 Features

Sep 1, 2025

Monthly summary for 2025-09: Stabilized deployment surface, modernized tests, and aligned dependencies across rollkit/rollkit, rollkit/go-execution-abci, and celestiaorg/celestia-app to improve reliability, performance, and developer velocity. Key outcomes include the rollout of node readiness gating, major Tastora upgrades, testing infra modernization with Tastora Reth, and DA-layer testing enhancements, along with routine dependency maintenance to keep the stack secure and compatible.

August 2025

6 Commits • 2 Features

Aug 1, 2025

Month: 2025-08 was focused on strengthening end-to-end testing coverage for cross-chain interoperability and stabilizing test infrastructure to enable safer and faster releases. Delivered an End-to-End IBC/ICA Testing Framework in celestia-app with CI/Makefile support, expanded coverage for cross-chain token transfers, upgrades, and Hermes relayer setup. Stabilized test infrastructure and CI workflows by fixing variable naming, timeouts, entrypoint alignment, and a tastora dependency issue, improving nightly test reliability. In rollkit, updated End-to-end Docker tests to reflect Celestia app API changes, pinned dependencies, upgraded Celestia-app to v5, and standardized environments by renaming rollkit to ev-node to ensure consistent interfacing. Overall, these contributions reduce integration risk, shorten feedback loops, and strengthen cross-chain verification.

July 2025

7 Commits • 4 Features

Jul 1, 2025

July 2025 performance highlights across Celestia’s core repos, focusing on CI reliability, end-to-end testing, and cross-chain interoperability. The work accelerates safe releases, improves test coverage, and demonstrates strong cross-team collaboration across Go, Docker-based testing, and modular test builder patterns.

June 2025

6 Commits • 3 Features

Jun 1, 2025

June 2025 performance summary focused on delivering robust CI/CD improvements, expansive Docker-based testing, and critical bug fixes across Rollkit and Celestia App. The work increased release reliability, expanded testing coverage, and strengthened test-data integrity, enabling faster, safer deployments and more dependable full-node interactions.

May 2025

9 Commits • 3 Features

May 1, 2025

May 2025 monthly summary for Celestia repositories (celestia-app and celestia-node).

April 2025

7 Commits • 3 Features

Apr 1, 2025

April 2025 — celestia-app monthly performance summary. Focused on delivering deployment readiness features, strengthening upgrade reliability, and improving testing infrastructure, while fixing critical integration gaps to enable broader API/gRPC interoperability and block queries. Key features delivered: - Standalone gRPC server mode enabling multiplexer readiness: Introduced standalone gRPC server capability and refactored startStandAlone to manage API and gRPC servers independently, enabling flexible deployment of Celestia services. Commits: cb68ab9a1485833b0bbe7bb730a75eafb5fd2df3. - Multiplexer build and test infrastructure improvements: Improved build/test pipeline with correct OS/arch args for end-to-end upgrades, switched to published multiplexer version, and streamlined builds by removing embedded test binaries. Commits: 3500e274b319805bbe001dd2dc4876a93401c77e; 77cbba394b3fc11eb7b6dc8110524578e7065e74; f576ca1a0ae7ef905cbee210d41065a6b83417e6. - End-to-end upgrade testing enhancements: Added end-to-end upgrade test (v3 to v4) with Knuu; refactored test infra, JSON utilities, and ensured robust image overrides and genesis handling, plus improving E2E reliability. Commits: 7c4daff7f3609dbe609c2a1f7e04c147a806f02a; 04ad2e9eb690c96269118e4ddd7ade6f6ddffe23. Major bugs fixed: - Tendermint service registration bug fix: Register Tendermint service so that API/gRPC enabled setups support querying blocks via celestia-appd q block. Commit: d433a4cb178e11814ed2cb287e10a08cc897404d. Overall impact and accomplishments: - Enabled flexible deployment options and improved service readiness with standalone gRPC, aligning with customer needs for modular Celestia service deployment. - Strengthened upgrade readiness through robust end-to-end upgrade testing (v3→v4) and improved test infrastructure, reducing upgrade risk and time-to-value. - Optimized the build/test pipeline, reducing CI time and complexity by using published multiplexer versions and removing embedded test artifacts. Technologies/skills demonstrated: - Go-based service architecture, gRPC, and multi-service orchestration. - End-to-end testing frameworks, test infra modernization, and JSON utilities. - Image override handling and genesis setup for upgrade scenarios.

Activity

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Quality Metrics

Correctness87.0%
Maintainability83.0%
Architecture83.6%
Performance74.4%
AI Usage24.2%

Skills & Technologies

Programming Languages

DockerfileGoMakefileShellYAML

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentBlockchainBlockchain DevelopmentBuild AutomationBuild Process OptimizationBuild SystemsBuilder PatternCI/CDCI/CD ConfigurationCelestiaCelestia NetworkCode CleanupCode Refactoring

Repositories Contributed To

4 repos

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

celestiaorg/celestia-app

Apr 2025 Oct 2025
7 Months active

Languages Used

DockerfileGoMakefileShellYAML

Technical Skills

API DevelopmentBackend DevelopmentBuild Process OptimizationBuild SystemsCI/CDCode Cleanup

rollkit/rollkit

Jun 2025 Oct 2025
4 Months active

Languages Used

DockerfileGoMakefileYAML

Technical Skills

BlockchainCI/CDDockerEnd-to-End TestingGitHub ActionsGo Development

rollkit/go-execution-abci

Jul 2025 Oct 2025
3 Months active

Languages Used

GoYAMLDockerfileShell

Technical Skills

CI/CDCelestiaCosmos SDKDockerEnd-to-End TestingIntegration Testing

celestiaorg/celestia-node

May 2025 Oct 2025
3 Months active

Languages Used

GoShell

Technical Skills

API IntegrationCode RefactoringDependency ManagementGo ModulesDockerEnd-to-End Testing

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