epam/ketcher
Oct 2024 – Oct 2025
13 Months active
Languages Used
JavaScriptTypeScriptrxnJSONCSSHTMLPNGMarkdown
Technical Skills
Chemical DrawingFront End DevelopmentFront-end DevelopmentJavaScriptMacromolecule HandlingMolecular Visualization
Roman Rodionov
PROFILE
Roman Rodionov
Roman Rodionov developed advanced macromolecule editing and visualization features for the epam/ketcher repository, focusing on robust sequence handling, property calculation, and UI/UX improvements. He engineered complex layout algorithms and state management in TypeScript and React, enabling precise manipulation of molecular structures and seamless integration of new monomer types. By upgrading Indigo dependencies and refining automated testing, Roman ensured stability and compatibility across releases. His work included implementing context-aware editing tools, enhancing rendering fidelity, and introducing configurable workflows, which improved modeling accuracy and user experience. The depth of his contributions addressed both domain-specific challenges and core software reliability.
Overall Statistics
Feature vs Bugs
54%Features
Repository Contributions
171Total
Bugs
38
Commits
171
Features
44
Lines of code
715,968
Activity Months13
Your Network
175 people
Work History
October 2025
5 Commits • 3 Features
Oct 1, 2025In 2025-10, delivered and stabilized core features for epam/ketcher with a focus on accuracy, configurability, and reliability. Key features include snake layout enhancements for macromolecular structures, enhancements to support small molecules within the snake layout, and a refactor of the layout model to operate with rows and chains, along with updated rules for bond behavior and improved rendering/scrolling. The monomer creation wizard gained a new modification types management flow with validation and UI support to ensure correct association with natural analogues. A config-driven Create Monomer tool toggle was introduced and Ketcher upgraded to 3.9.0-rc.3 to support the change. On the quality and stability front, local persistence of monomer library updates was disabled to prevent unintended local storage saves, and Indigo migration tests were stabilized with a backmerge and updated autotests. Overall impact: these efforts improve modeling accuracy, user workflow configurability, data integrity, and test reliability, contributing to a more robust release cycle and smoother user experience. Technologies demonstrated include frontend layout engineering, React-like UI updates, local storage risk mitigation, test snapshot maintenance, and toolchain upgrades (Indigo, Ketcher).
5 Commits • 3 Features
Oct 1, 2025In 2025-10, delivered and stabilized core features for epam/ketcher with a focus on accuracy, configurability, and reliability. Key features include snake layout enhancements for macromolecular structures, enhancements to support small molecules within the snake layout, and a refactor of the layout model to operate with rows and chains, along with updated rules for bond behavior and improved rendering/scrolling. The monomer creation wizard gained a new modification types management flow with validation and UI support to ensure correct association with natural analogues. A config-driven Create Monomer tool toggle was introduced and Ketcher upgraded to 3.9.0-rc.3 to support the change. On the quality and stability front, local persistence of monomer library updates was disabled to prevent unintended local storage saves, and Indigo migration tests were stabilized with a backmerge and updated autotests. Overall impact: these efforts improve modeling accuracy, user workflow configurability, data integrity, and test reliability, contributing to a more robust release cycle and smoother user experience. Technologies demonstrated include frontend layout engineering, React-like UI updates, local storage risk mitigation, test snapshot maintenance, and toolchain upgrades (Indigo, Ketcher).
October 2025
September 2025
14 Commits • 2 Features
Sep 1, 2025Concise monthly summary for 2025-09 focusing on epam/ketcher development work. Highlights include feature delivery that improves editing precision, stability improvements across the editor, and library/test enhancements that underpin reliability and future work. This month solidified the foundation for complex structure editing and cross-browser robustness, while aligning tests with updated engine capabilities.
September 2025
14 Commits • 2 Features
Sep 1, 2025Concise monthly summary for 2025-09 focusing on epam/ketcher development work. Highlights include feature delivery that improves editing precision, stability improvements across the editor, and library/test enhancements that underpin reliability and future work. This month solidified the foundation for complex structure editing and cross-browser robustness, while aligning tests with updated engine capabilities.
August 2025
14 Commits • 5 Features
Aug 1, 2025Concise monthly performance summary for 2025-08 focused on delivering business value through UI/UX improvements, stability fixes, and library enhancements for epoxy/ketcher.
14 Commits • 5 Features
Aug 1, 2025Concise monthly performance summary for 2025-08 focused on delivering business value through UI/UX improvements, stability fixes, and library enhancements for epoxy/ketcher.
August 2025
July 2025
6 Commits • 3 Features
Jul 1, 2025Month: 2025-07 — Epam/ketcher monthly summary: Delivered targeted features and stability improvements that advance modeling capabilities, reliability, and security, while strengthening CI quality gates. Key feature delivered: reaction arrows support in macromolecules mode with multitail arrows, including new models/views and updated tests. Performance and stability: molecules canvas optimizations for large monomer counts, addressing related build, undo/redo, leaving groups, and valence issues. Quality automation: added a GitHub Actions workflow for SonarQube scans to enforce code quality and consistency across PRs and pushes. Reliability: Redux-related stability fix to suppress console errors when manipulating structures with nucleotide component marking via asynchronous actions. Security: hardening of form-data boundary selection to mitigate boundary-choosing vulnerabilities, with asset updates and tests. Technologies/skills demonstrated: React/Redux, in-browser Indigo integration, performance profiling and optimization, GitHub Actions, SonarQube, secure data handling, test-driven validation.
July 2025
6 Commits • 3 Features
Jul 1, 2025Month: 2025-07 — Epam/ketcher monthly summary: Delivered targeted features and stability improvements that advance modeling capabilities, reliability, and security, while strengthening CI quality gates. Key feature delivered: reaction arrows support in macromolecules mode with multitail arrows, including new models/views and updated tests. Performance and stability: molecules canvas optimizations for large monomer counts, addressing related build, undo/redo, leaving groups, and valence issues. Quality automation: added a GitHub Actions workflow for SonarQube scans to enforce code quality and consistency across PRs and pushes. Reliability: Redux-related stability fix to suppress console errors when manipulating structures with nucleotide component marking via asynchronous actions. Security: hardening of form-data boundary selection to mitigate boundary-choosing vulnerabilities, with asset updates and tests. Technologies/skills demonstrated: React/Redux, in-browser Indigo integration, performance profiling and optimization, GitHub Actions, SonarQube, secure data handling, test-driven validation.
June 2025
16 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for epam/ketcher: Key platform updates focusing on dependency maintenance, feature expansion, and stability. Upgraded Indigo dependencies to v1.33.0-rc.1 and v1.34.0-dev.1, adjusted tests for library changes to improve stability. Implemented nucleotide components support (S-group types) with visuals across formats and UI. Strengthened editor reliability with lifecycle crash fixes when closing or modifying macromolecules and during mode transitions. Made UI/UX improvements including styling imports, context-menu enhancements, and more robust input fields and tooltips. These changes improve reliability, reduce risk in releases, and broaden domain capabilities for users.
16 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for epam/ketcher: Key platform updates focusing on dependency maintenance, feature expansion, and stability. Upgraded Indigo dependencies to v1.33.0-rc.1 and v1.34.0-dev.1, adjusted tests for library changes to improve stability. Implemented nucleotide components support (S-group types) with visuals across formats and UI. Strengthened editor reliability with lifecycle crash fixes when closing or modifying macromolecules and during mode transitions. Made UI/UX improvements including styling imports, context-menu enhancements, and more robust input fields and tooltips. These changes improve reliability, reduce risk in releases, and broaden domain capabilities for users.
June 2025
May 2025
11 Commits • 2 Features
May 1, 2025May 2025: Focused on correctness, stability, and editing ease in epam/ketcher. Delivered key fixes to macromolecule property calculations, improved rendering fidelity and editing flow in the Ketcher editor, and enabled direct amino acid modifications on the canvas. These changes reduce design errors, shorten iteration cycles, and boost user confidence in structural-property workflows.
May 2025
11 Commits • 2 Features
May 1, 2025May 2025: Focused on correctness, stability, and editing ease in epam/ketcher. Delivered key fixes to macromolecule property calculations, improved rendering fidelity and editing flow in the Ketcher editor, and enabled direct amino acid modifications on the canvas. These changes reduce design errors, shorten iteration cycles, and boost user confidence in structural-property workflows.
April 2025
17 Commits • 4 Features
Apr 1, 2025April 2025 monthly summary for epam/ketcher. Focused on library modernization, stability improvements in macromolecule editing, and expansion of analytical capabilities, delivering clear business value through reliable editing, broader monomer support, and new property calculations. Key integration work enabled seamless upgrades of the Indigo library and alignment of tests to support future feature velocity.
17 Commits • 4 Features
Apr 1, 2025April 2025 monthly summary for epam/ketcher. Focused on library modernization, stability improvements in macromolecule editing, and expansion of analytical capabilities, delivering clear business value through reliable editing, broader monomer support, and new property calculations. Key integration work enabled seamless upgrades of the Indigo library and alignment of tests to support future feature velocity.
April 2025
March 2025
30 Commits • 7 Features
Mar 1, 2025March 2025 performance highlights across epam/ketcher: Delivered key feature updates to sequence mode, enhanced API ergonomics, and improved standalone distribution, while stabilizing the editing workflow with targeted bug fixes. These efforts increased reliability for sequence-based editing, enabled easier integration with external tools, and broadened library support, delivering measurable business value through faster iteration and improved user experience.
March 2025
30 Commits • 7 Features
Mar 1, 2025March 2025 performance highlights across epam/ketcher: Delivered key feature updates to sequence mode, enhanced API ergonomics, and improved standalone distribution, while stabilizing the editing workflow with targeted bug fixes. These efforts increased reliability for sequence-based editing, enabled easier integration with external tools, and broadened library support, delivering measurable business value through faster iteration and improved user experience.
February 2025
17 Commits • 3 Features
Feb 1, 2025February 2025: Delivered core macromolecule sequence editing enhancements, stabilized UI interactions in Flex/Snake modes, and refreshed the Ketcher library with testing improvements. These efforts increased editing reliability, reduced edge-case failures, and improved developer/testing confidence. Key deliverables: - Macromolecule Sequence Mode Core Improvements: Introduced SequenceViewModel, corrected sequence formation and cursor logic, ensured robust handling of sense/antisense chains, and strengthened insertion/removal behavior in sequence mode. - UI Rendering and Interaction Stability in Flex/Snake Modes: Improved visual rendering, attachment points, and selection merging; addressed issues with moved monomers, disconnected points, and paste duplicates for a cleaner user experience. - Ketcher Library Update and Testing Reliability: Upgraded Ketcher library, improved monomer preview rendering and clipboard behavior, and added a testing utility to stabilize flaky tests. Overall impact and accomplishments: - Increased reliability and correctness of macromolecule editing workflows, reducing edge-case failures and manual bug-fixing in sequence mode. - Improved user experience and consistency of rendering and interactions in Flex/Snake modes, with fewer visual defects and copy-paste anomalies. - Enhanced release confidence through library upgrades and test stabilization, enabling faster iteration and safer deployments. Technologies/skills demonstrated: - TypeScript/React state management (SequenceViewModel), UI/UX debugging, and rendering optimizations. - Complex domain modeling for macromolecule sequences (sense/antisense logic, backbone/attachment point adjustments). - Test stabilization, backmerge practices, and clipboard/preview handling for monomer components.
17 Commits • 3 Features
Feb 1, 2025February 2025: Delivered core macromolecule sequence editing enhancements, stabilized UI interactions in Flex/Snake modes, and refreshed the Ketcher library with testing improvements. These efforts increased editing reliability, reduced edge-case failures, and improved developer/testing confidence. Key deliverables: - Macromolecule Sequence Mode Core Improvements: Introduced SequenceViewModel, corrected sequence formation and cursor logic, ensured robust handling of sense/antisense chains, and strengthened insertion/removal behavior in sequence mode. - UI Rendering and Interaction Stability in Flex/Snake Modes: Improved visual rendering, attachment points, and selection merging; addressed issues with moved monomers, disconnected points, and paste duplicates for a cleaner user experience. - Ketcher Library Update and Testing Reliability: Upgraded Ketcher library, improved monomer preview rendering and clipboard behavior, and added a testing utility to stabilize flaky tests. Overall impact and accomplishments: - Increased reliability and correctness of macromolecule editing workflows, reducing edge-case failures and manual bug-fixing in sequence mode. - Improved user experience and consistency of rendering and interactions in Flex/Snake modes, with fewer visual defects and copy-paste anomalies. - Enhanced release confidence through library upgrades and test stabilization, enabling faster iteration and safer deployments. Technologies/skills demonstrated: - TypeScript/React state management (SequenceViewModel), UI/UX debugging, and rendering optimizations. - Complex domain modeling for macromolecule sequences (sense/antisense logic, backbone/attachment point adjustments). - Test stabilization, backmerge practices, and clipboard/preview handling for monomer components.
February 2025
January 2025
7 Commits • 2 Features
Jan 1, 2025January 2025: Delivered major modernization and stability improvements across the Ketcher repository (epam/ketcher). Key features include ES6 module-based standalone build with Indigo integration, and editor UX enhancements such as auto-zoom on insertion and macro mode, plus stability improvements. Fixed CSP in development to align with security policies, ensured reliable loading of monomers in RXN 3000 files, resolved UI scrollbar issues in the macromolecule editor, and strengthened editor lifecycle handling. These changes reduce runtime errors, improve development workflow, and deliver faster, more reliable molecule editing and rendering for end users.
January 2025
7 Commits • 2 Features
Jan 1, 2025January 2025: Delivered major modernization and stability improvements across the Ketcher repository (epam/ketcher). Key features include ES6 module-based standalone build with Indigo integration, and editor UX enhancements such as auto-zoom on insertion and macro mode, plus stability improvements. Fixed CSP in development to align with security policies, ensured reliable loading of monomers in RXN 3000 files, resolved UI scrollbar issues in the macromolecule editor, and strengthened editor lifecycle handling. These changes reduce runtime errors, improve development workflow, and deliver faster, more reliable molecule editing and rendering for end users.
December 2024
17 Commits • 3 Features
Dec 1, 2024December 2024 focused on delivering robust antisense sequence tooling, editor reliability improvements, library integration, and macromolecule rendering enhancements. The work improves end-to-end scientific workflows, reduces user friction, and strengthens file compatibility, aligning with business goals of accuracy, usability, and maintainability.
17 Commits • 3 Features
Dec 1, 2024December 2024 focused on delivering robust antisense sequence tooling, editor reliability improvements, library integration, and macromolecule rendering enhancements. The work improves end-to-end scientific workflows, reduces user friction, and strengthens file compatibility, aligning with business goals of accuracy, usability, and maintainability.
December 2024
November 2024
10 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for the epam/ketcher project. Focused on library stability, improved serialization paths, and expanded format support, while tightening editor behavior and bonds handling to reduce user friction and improve interoperability. Notable work includes upgrading core libraries, stabilizing KET export pipelines, and introducing remote-format controls. A known issue remains for reaction auto-mapping tests due to screenshot rendering, which is tracked separately. Overall, this month delivered concrete business value by enabling more reliable file exports/imports, enabling V3000 format control in remote services, and improving the macromolecule editing workflow for complex structures.
November 2024
10 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for the epam/ketcher project. Focused on library stability, improved serialization paths, and expanded format support, while tightening editor behavior and bonds handling to reduce user friction and improve interoperability. Notable work includes upgrading core libraries, stabilizing KET export pipelines, and introducing remote-format controls. A known issue remains for reaction auto-mapping tests due to screenshot rendering, which is tracked separately. Overall, this month delivered concrete business value by enabling more reliable file exports/imports, enabling V3000 format control in remote services, and improving the macromolecule editing workflow for complex structures.
October 2024
7 Commits • 4 Features
Oct 1, 2024Month 2024-10 focused on advancing macromolecule visualization, editing UX, and data interoperability in epam/ketcher. Delivered key features, fixed critical rendering issues, and aligned dependencies to strengthen stability and testing. Key outcomes include improved zoom behavior in macromolecule editor (top-left anchored zoom and auto-zoom on import), enhanced hydrogen bond rendering and labeling, support for three-letter amino acid codes in sequence formats, more robust molecular structure connection rendering, and an Indigo library update with synchronized test data. Business value: faster, more accurate macromolecule modeling; broader sequence format support; fewer rendering edge cases; improved stability from dependency updates and test data alignment.
7 Commits • 4 Features
Oct 1, 2024Month 2024-10 focused on advancing macromolecule visualization, editing UX, and data interoperability in epam/ketcher. Delivered key features, fixed critical rendering issues, and aligned dependencies to strengthen stability and testing. Key outcomes include improved zoom behavior in macromolecule editor (top-left anchored zoom and auto-zoom on import), enhanced hydrogen bond rendering and labeling, support for three-letter amino acid codes in sequence formats, more robust molecular structure connection rendering, and an Indigo library update with synchronized test data. Business value: faster, more accurate macromolecule modeling; broader sequence format support; fewer rendering edge cases; improved stability from dependency updates and test data alignment.
October 2024
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Quality Metrics
Correctness85.8%
Maintainability83.8%
Architecture80.6%
Performance76.6%
AI Usage21.8%
Skills & Technologies
Programming Languages
CDXMLCSSHTMLJSONJavaScriptLessMarkdownPNGSDFSVG
Technical Skills
API DevelopmentAPI IntegrationAutomated TestingBackend DevelopmentBackmergingBioinformaticsBrowser CompatibilityBug FixBug FixingBuild ConfigurationBuild ToolsCI/CDCSSCanvas APIChemical Drawing
Repositories Contributed To
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