epam/ketcher
Oct 2024 – Oct 2025
13 Months active
Languages Used
JavaScriptTypeScriptCSSHTMLSMARTSLessMarkdownYAML
Technical Skills
Chemical Structure EditingFront-end DevelopmentMacromolecule HandlingRefactoringEnd-to-end testingJavaScript
Nikita Chistousov
PROFILE
Nikita Chistousov
Nikita Chistousov developed advanced macromolecule editing and visualization features for the epam/ketcher repository, focusing on robust workflows for chemical structure creation and manipulation. He engineered interactive editors and wizards that streamline monomer creation, attachment point management, and sequence export, addressing complex requirements in chemical drawing software. Leveraging TypeScript, React, and SVG rendering, Nikita implemented drag-and-drop interfaces, snapping systems, and cross-platform hotkey support to enhance usability and reliability. His work included deep integration with chemical file formats and automated testing, ensuring data integrity and UI stability. These contributions improved editing precision, workflow efficiency, and long-term maintainability for scientific users.
Overall Statistics
Feature vs Bugs
59%Features
Repository Contributions
72Total
Bugs
17
Commits
72
Features
24
Lines of code
43,954
Activity Months13
Your Network
175 people
Work History
October 2025
9 Commits • 2 Features
Oct 1, 2025October 2025 (2025-10): Delivered key UX and stability improvements in epam/ketcher, focusing on the Monomer Creation Wizard, library API integrity, and cross-platform hotkey reliability. These efforts streamlined molecule design workflows, strengthened library management, and improved cross-OS consistency, translating to reduced support overhead and faster feature adoption.
9 Commits • 2 Features
Oct 1, 2025October 2025 (2025-10): Delivered key UX and stability improvements in epam/ketcher, focusing on the Monomer Creation Wizard, library API integrity, and cross-platform hotkey reliability. These efforts streamlined molecule design workflows, strengthened library management, and improved cross-OS consistency, translating to reduced support overhead and faster feature adoption.
October 2025
September 2025
5 Commits • 1 Features
Sep 1, 2025November? No, September 2025 monthly summary for the epam/ketcher project focusing on the Monomer Creation Wizard improvements and related fixes. This month delivered a more reliable monomer creation workflow through enhanced attachment point management and validation, addressing critical crashes and UI feedback gaps, and ensuring saving correctness. The work consolidated multiple backmerge fixes to stabilize the feature across related issues.
September 2025
5 Commits • 1 Features
Sep 1, 2025November? No, September 2025 monthly summary for the epam/ketcher project focusing on the Monomer Creation Wizard improvements and related fixes. This month delivered a more reliable monomer creation workflow through enhanced attachment point management and validation, addressing critical crashes and UI feedback gaps, and ensuring saving correctness. The work consolidated multiple backmerge fixes to stabilize the feature across related issues.
August 2025
10 Commits • 1 Features
Aug 1, 2025August 2025 — epam/ketcher: Delivered end-to-end Monomer Creation Wizard with enhanced logic and validation, stabilized macromolecule editor UX, and completed a React 19 upgrade across packages. Result: fewer invalid monomer creations, smoother workflows for creating monomers from structure parts, and easier long-term maintenance. Key changes include enhancements to the monomer creation flow, cursor/drag fixes for presets, and cleanup of wizard tooling. Key commits span the Monomer Creation Wizard Enhancements and Logic (ba4b3ef2...), various backmerge stabilizations (df799a1f..., e26f9d7a..., d25e4009..., bf39eee6..., 5e827d0a..., 9e18c4dc...), Macromolecule Editor Cursor/Drag Bug Fix (3edf4b3c...), React 19 upgrade (1118801d...), and cleanup (9d3dfeda...).
10 Commits • 1 Features
Aug 1, 2025August 2025 — epam/ketcher: Delivered end-to-end Monomer Creation Wizard with enhanced logic and validation, stabilized macromolecule editor UX, and completed a React 19 upgrade across packages. Result: fewer invalid monomer creations, smoother workflows for creating monomers from structure parts, and easier long-term maintenance. Key changes include enhancements to the monomer creation flow, cursor/drag fixes for presets, and cleanup of wizard tooling. Key commits span the Monomer Creation Wizard Enhancements and Logic (ba4b3ef2...), various backmerge stabilizations (df799a1f..., e26f9d7a..., d25e4009..., bf39eee6..., 5e827d0a..., 9e18c4dc...), Macromolecule Editor Cursor/Drag Bug Fix (3edf4b3c...), React 19 upgrade (1118801d...), and cleanup (9d3dfeda...).
August 2025
July 2025
1 Commits • 1 Features
Jul 1, 2025Concise monthly summary for July 2025 focusing on key accomplishments, business impact, and technical achievements for the epam/ketcher repo.
July 2025
1 Commits • 1 Features
Jul 1, 2025Concise monthly summary for July 2025 focusing on key accomplishments, business impact, and technical achievements for the epam/ketcher repo.
June 2025
4 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for epam/ketcher: focused on improving structure rendering clarity and editor reliability; delivered feature to prevent CIP stereo label overlap, stabilized sequence editor layout with ruler, and resolved Redux-related monomer visibility issues. These efforts reduce user confusion, improve editing fidelity for complex structures, and strengthen overall UI reliability while maintaining performance.
4 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for epam/ketcher: focused on improving structure rendering clarity and editor reliability; delivered feature to prevent CIP stereo label overlap, stabilized sequence editor layout with ruler, and resolved Redux-related monomer visibility issues. These efforts reduce user confusion, improve editing fidelity for complex structures, and strengthen overall UI reliability while maintaining performance.
June 2025
May 2025
9 Commits • 3 Features
May 1, 2025May 2025 monthly summary for epam/ketcher focusing on stabilizing the Macromolecule workflow, expanding editor UX, and updating dependencies to improve reliability and performance. The work delivered highlights in four areas: hotkey-driven UX, stability and correctness fixes, expanded monomer and export correctness, and editor tooling that enhances measurable business value.
May 2025
9 Commits • 3 Features
May 1, 2025May 2025 monthly summary for epam/ketcher focusing on stabilizing the Macromolecule workflow, expanding editor UX, and updating dependencies to improve reliability and performance. The work delivered highlights in four areas: hotkey-driven UX, stability and correctness fixes, expanded monomer and export correctness, and editor tooling that enhances measurable business value.
April 2025
8 Commits • 3 Features
Apr 1, 2025Concise monthly summary for 2025-04 (epam/ketcher): Key features delivered include distance snapping enhancements for monomer bonds with tests; expanded monomer options including rotation and flipping with serialization preservation; and CIP stereo labels for macromolecules integrated into the conversion pipeline. Major bugs fixed include template data accuracy for D-/L-Phenylalanine; monomer selection UI reliability improvements; RNA Builder first-click monomer highlight fixed. Overall impact: improved editing precision, data integrity, and user experience, enabling researchers to design and share macromolecules more accurately and efficiently. Technologies/skills demonstrated: frontend feature development, UI/UX reliability, data model serialization/deserialization, testing, and cross-repo coordination including backmerge handling.
8 Commits • 3 Features
Apr 1, 2025Concise monthly summary for 2025-04 (epam/ketcher): Key features delivered include distance snapping enhancements for monomer bonds with tests; expanded monomer options including rotation and flipping with serialization preservation; and CIP stereo labels for macromolecules integrated into the conversion pipeline. Major bugs fixed include template data accuracy for D-/L-Phenylalanine; monomer selection UI reliability improvements; RNA Builder first-click monomer highlight fixed. Overall impact: improved editing precision, data integrity, and user experience, enabling researchers to design and share macromolecules more accurately and efficiently. Technologies/skills demonstrated: frontend feature development, UI/UX reliability, data model serialization/deserialization, testing, and cross-repo coordination including backmerge handling.
April 2025
March 2025
7 Commits • 3 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for epam/ketcher. Focused on delivering core editing features, reinforcing UI/UX around macromolecule construction, and upgrading the library stack to improve reliability and test stability. Achievements span feature delivery, editor robustness, and tooling upgrades that drive business value in faster, more accurate molecule design.
March 2025
7 Commits • 3 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for epam/ketcher. Focused on delivering core editing features, reinforcing UI/UX around macromolecule construction, and upgrading the library stack to improve reliability and test stability. Achievements span feature delivery, editor robustness, and tooling upgrades that drive business value in faster, more accurate molecule design.
February 2025
3 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for epam/ketcher. Focused on stabilizing HELM handling and enhancing bond rendering to improve data integrity and user experience for polymer and HELM-based chemistries. Key outcomes include updating the Indigo library in the browser module to the 1.29.0-rc.1 release, which improved HELM string import/export compatibility and test reliability, and delivering rendering improvements for cyclic structures and polymers, along with fixes that improve test stability.
3 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for epam/ketcher. Focused on stabilizing HELM handling and enhancing bond rendering to improve data integrity and user experience for polymer and HELM-based chemistries. Key outcomes include updating the Indigo library in the browser module to the 1.29.0-rc.1 release, which improved HELM string import/export compatibility and test reliability, and delivering rendering improvements for cyclic structures and polymers, along with fixes that improve test stability.
February 2025
January 2025
5 Commits • 3 Features
Jan 1, 2025Concise monthly summary for 2025-01 focused on epam/ketcher. Delivered core editor enhancements, bug fixes, and CI/CD modernization that collectively improve usability, reliability, and developer velocity, with clear business value tied to macromolecule editing workflows and export capabilities.
January 2025
5 Commits • 3 Features
Jan 1, 2025Concise monthly summary for 2025-01 focused on epam/ketcher. Delivered core editor enhancements, bug fixes, and CI/CD modernization that collectively improve usability, reliability, and developer velocity, with clear business value tied to macromolecule editing workflows and export capabilities.
December 2024
7 Commits • 3 Features
Dec 1, 20242024-12 (epam/ketcher): Delivered robust macromolecule editor improvements, expanded chemical modeling capabilities, and persistence layer enhancements. Key outcomes include fixes to macromolecule editor interactions (closest SGroup detection and distortions during multi-expand/multi-collapse in micro mode); enhancements enabling SGroup expansion, multiple bond types (single/double/triple/aromatic/stereochemical), and default activation of the macromolecule switcher; addition of updateMonomersLibrary API to persist monomer libraries across editor modes; Indigo library upgrade to 1.28.0-rc.1 in the browser module with corresponding UI test and snapshot updates. These changes reduce editing errors, improve chemist workflow efficiency, and strengthen rendering fidelity and test stability across the browser stack.
7 Commits • 3 Features
Dec 1, 20242024-12 (epam/ketcher): Delivered robust macromolecule editor improvements, expanded chemical modeling capabilities, and persistence layer enhancements. Key outcomes include fixes to macromolecule editor interactions (closest SGroup detection and distortions during multi-expand/multi-collapse in micro mode); enhancements enabling SGroup expansion, multiple bond types (single/double/triple/aromatic/stereochemical), and default activation of the macromolecule switcher; addition of updateMonomersLibrary API to persist monomer libraries across editor modes; Indigo library upgrade to 1.28.0-rc.1 in the browser module with corresponding UI test and snapshot updates. These changes reduce editing errors, improve chemist workflow efficiency, and strengthen rendering fidelity and test stability across the browser stack.
December 2024
November 2024
3 Commits • 1 Features
Nov 1, 2024Month: 2024-11 — Focused on delivering user-facing Macromolecule Editor enhancements for epam/ketcher and stabilizing the test/dependency surface. Key outcomes include multi-monomer expansion/collapse in micromolecule mode with refined S-group/bond handling; improved context menu behavior for expanded monomers and accurate differentiation between functional groups and monomer structures; and a library/test stabilization effort in the browser module.
November 2024
3 Commits • 1 Features
Nov 1, 2024Month: 2024-11 — Focused on delivering user-facing Macromolecule Editor enhancements for epam/ketcher and stabilizing the test/dependency surface. Key outcomes include multi-monomer expansion/collapse in micromolecule mode with refined S-group/bond handling; improved context menu behavior for expanded monomers and accurate differentiation between functional groups and monomer structures; and a library/test stabilization effort in the browser module.
October 2024
1 Commits
Oct 1, 2024In Oct 2024, the epam/ketcher team focused on hardening micro-mode editing workflows by delivering a critical bug fix that stabilizes monomer selection and external-bond handling. This work improves the robustness of bulk operations (selection, removal, undo) for macromolecular structures and reduces data inconsistencies during edits. The changes include a backmerge integration to align with upstream fixes, setting the stage for more reliable editing in micro mode and smoother user workflows.
1 Commits
Oct 1, 2024In Oct 2024, the epam/ketcher team focused on hardening micro-mode editing workflows by delivering a critical bug fix that stabilizes monomer selection and external-bond handling. This work improves the robustness of bulk operations (selection, removal, undo) for macromolecular structures and reduces data inconsistencies during edits. The changes include a backmerge integration to align with upstream fixes, setting the stage for more reliable editing in micro mode and smoother user workflows.
October 2024
Activity
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Quality Metrics
Correctness85.8%
Maintainability82.8%
Architecture80.6%
Performance74.6%
AI Usage22.0%
Skills & Technologies
Programming Languages
CSSHTMLJSXJavaScriptLessMarkdownSDFSMARTSSVGShell
Technical Skills
API DevelopmentAPI IntegrationAutomated TestingBuild System ConfigurationBuild ToolsCI/CDCSSCanvas APIChemical DrawingChemical Drawing SoftwareChemical File FormatsChemical Structure EditingChemical Structure RenderingChemical Structure RepresentationCode Refactoring
Repositories Contributed To
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