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Aleksandar Acic

PROFILE

Aleksandar Acic

Over 11 months, Alex Acic developed and maintained core infrastructure and user-facing features for the stjude/proteinpaint repository, focusing on deployment reliability, data visualization, and scalable annotation workflows. He engineered robust CI/CD pipelines using GitHub Actions and Docker, streamlined build automation with Bash and TypeScript, and advanced containerization for reproducible environments. Alex refactored backend and frontend components to improve error handling, data persistence, and rendering accuracy, while introducing Kubernetes and Helm for production deployments. His work addressed complex integration challenges, stabilized distributed systems, and enabled faster, safer releases, demonstrating depth in DevOps, Node.js, and cross-language scripting for scientific applications.

Overall Statistics

Feature vs Bugs

70%Features

Repository Contributions

120Total
Bugs
16
Commits
120
Features
38
Lines of code
29,448
Activity Months11

Work History

October 2025

6 Commits • 1 Features

Oct 1, 2025

Month 2025-10: Delivered a streamlined CI/CD pipeline for stjude/proteinpaint, consolidating build logic into scripts, removing ARM build support, switching authentication to GITHUB_TOKEN, and removing buildx to simplify publishing development containers. ARM64 container builds were stabilized with a bug fix to the development container build script. Redis/TileServer connectivity issues were resolved by refactoring client holders and shard instantiation to pass connection details via object literals. These changes reduced release friction, improved ARM64 reliability, and increased runtime stability for distributed components, delivering tangible business value through faster, more reliable deployments and fewer runtime errors.

September 2025

13 Commits • 4 Features

Sep 1, 2025

In September 2025, the proteinpaint project delivered key features to improve data reliability, UI capabilities, and deployment tooling, while stabilizing the model retraining workflow and codebase. The work reduces filesystem coupling, modernizes AI data handling, improves user interaction with annotations and tile selections in the WSIViewer, centralizes retraining/session management, and enhances deployment consistency with updated Helm charts and Rust tooling. These changes collectively enable faster data-driven experimentation, improved reliability, and smoother deployments.

August 2025

11 Commits • 2 Features

Aug 1, 2025

August 2025 monthly summary for stjude/proteinpaint focusing on delivering user-facing WSIViewer enhancements, improving accuracy of rendering and data persistence, and advancing production readiness via Kubernetes deployment. The work improves user experience, reliability, and deployment efficiency, aligning with business goals of scalable annotation workflows and reproducible deployments.

July 2025

28 Commits • 11 Features

Jul 1, 2025

July 2025 monthly summary for stjude/proteinpaint focusing on delivering features, fixing critical bugs, and strengthening security and CI/CD processes.

June 2025

3 Commits • 1 Features

Jun 1, 2025

June 2025: Implemented CI/CD reliability and build artifact management for stjude/proteinpaint, focusing on robust test workflows, failure visibility, and organized artifact handling for pp repo changes. Introduced a 'tmppack' directory to store CI tarballs, enhanced Slack notifications for test failures, and stabilized the pipeline by fixing unit/integration test workflows and the dependencies image build.

May 2025

25 Commits • 12 Features

May 1, 2025

May 2025 monthly wrap-up for stjude/proteinpaint focusing on containerization, CI/QA improvements, and release readiness. Delivered Docker/Rust image setup, prerelease/release checks and streamlined deps build, CI workflow hygiene and dependency management, executable packaging script improvements, and version/release tooling enhancements. These changes increase reproducibility, build isolation, and safety of releases while shortening time-to-market for updates.

April 2025

18 Commits • 1 Features

Apr 1, 2025

April 2025 (2025-04) monthly summary for stjude/proteinpaint: Reliability, reproducibility, and faster, safer releases were the focus. Delivered deployment stability through runtime upgrades, strengthened CI/CD and release automation, and fixed critical Node.js runtime import. These efforts improved deployment success rates, reduced build failures, and supported cross- architecture releases. Technologies demonstrated include Python, R, Rust, Docker, GitHub Actions, and Node.js.

March 2025

7 Commits • 2 Features

Mar 1, 2025

March 2025 monthly work summary for stjude/proteinpaint: Focused on automation and process improvements to strengthen deployment reliability and developer experience. Key changes delivered include Sjpp deployment automation and CI/CD environment modernization, as well as developer workflow enhancements with pre-commit hooks and git hooks. No major bugs fixed this month; the emphasis was on reducing toil, improving consistency across environments, and enabling faster release cycles. Overall impact: faster, more reliable SJPP deployments, easier onboarding for new contributors, and higher code quality through automated checks. Technologies demonstrated: CI/CD via GitHub Actions, Node.js updates (to v22), Ubuntu-based runners (ubuntu-latest/22.04), Docker, pre-commit tooling, and Dockerfile adjustments for pre-commit compatibility.

February 2025

4 Commits • 2 Features

Feb 1, 2025

February 2025 monthly summary for stjude/proteinpaint focusing on key accomplishments and business value. The work centered on reinforcing visualization reliability, stabilizing the CI/CD process, and maintaining dependency hygiene to support stable releases and reproducible environments. Key features delivered: - CI/CD Workflow Stability Improvements: Increased dependency image build timeout to 100 minutes and refined deployment workflow to prevent timeouts and unintended version-dispatch events; disables redundant deployment action to target repository. (Commits: b683e2ba81569ca8882ec8d00a05e2573ea993dd, f0ad3f29e34e72cdc21e848f53f7807e3069c017) - Dependency Lockfile Hygiene: Updated package-lock.json to keep dependencies consistent and up-to-date through routine maintenance. (Commit: b1538ceeadf9ef43c34fc534a11fe2dbb338d547) Major bugs fixed: - CNV Visualization Reliability: Fixed CNV rendering when chromosome information is missing by moving filtering to DataMapper.filterCnvs to only process valid reference chromosomes, preventing arcs for unknown/invalid entries. (Commit: d57b8619222a92b4e79f873d669b5bc12cbb2841) Overall impact and accomplishments: - Improved data visualization reliability, reducing erroneous CNV renderings and enhancing user trust in the ProteinPaint visualization. - Stabilized release processes with fewer deployment timeouts and more predictable version-dispatch behavior, contributing to faster, more reliable release cycles. - Maintained consistent development environments with up-to-date dependencies, lowering maintenance burden. Technologies/skills demonstrated: - TypeScript/DataMapper logic and data validation for robust CNV rendering. - CI/CD pipeline optimization and deployment governance. - Dependency management and package-lock hygiene to ensure reproducible builds.

January 2025

4 Commits • 1 Features

Jan 1, 2025

January 2025 monthly summary for stjude/proteinpaint: Focused on delivering business value through CI reliability improvements and bug fixes that stabilize WSI workflows and reduce maintenance overhead. Key outcomes include standardizing the CI environment to ubuntu-22.04 across GitHub Actions for consistent builds and permission checks; fixing import paths for clearWSImagesSessionsPayload; correcting vocabulary-state access during WSI images loading to ensure proper data flow. Together, these changes reduce pipeline flakiness, cut debugging time, and enable faster feature delivery.

November 2024

1 Commits • 1 Features

Nov 1, 2024

In 2024-11, delivered a targeted enhancement to the frontend asset pipeline for stjude/proteinpaint, focusing on robust error handling during bundle extraction and improved visibility for asset generation failures. This work tightened reliability of builds and accelerated issue diagnosis in CI/CD workflows.

Activity

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Quality Metrics

Correctness88.4%
Maintainability89.0%
Architecture85.8%
Performance80.8%
AI Usage20.8%

Skills & Technologies

Programming Languages

BashDockerfileHTMLJSONJavaScriptMarkdownPythonRShellTypeScript

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentBash ScriptingBuild AutomationBuild ConfigurationBuild ProcessBuild SystemsCI/CDCode CleanupCode RefactoringComponent RefactoringContainerizationD3.jsData Handling

Repositories Contributed To

1 repo

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

stjude/proteinpaint

Nov 2024 Oct 2025
11 Months active

Languages Used

JavaScriptTypeScriptYAMLJSONBashDockerfileShellPython

Technical Skills

Build ProcessError HandlingScriptingCI/CDCode RefactoringFront-end Development

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