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Stratoula Kalafateli

PROFILE

Stratoula Kalafateli

Efstratia Kalafateli developed and maintained advanced ES|QL features and editor tooling for the viduni94/kibana repository, focusing on robust query authoring, dashboard integration, and data exploration reliability. She engineered autocomplete systems, validation logic, and dynamic controls using TypeScript and React, while optimizing backend workflows with Elasticsearch integration. Her work included refactoring core utilities, consolidating type definitions, and improving test infrastructure to reduce technical debt and streamline onboarding. By enhancing UI/UX, stabilizing functional tests, and enabling scalable extensions, Efstratia delivered solutions that improved developer productivity, reduced query errors, and accelerated feature delivery, demonstrating depth in both frontend and backend engineering.

Overall Statistics

Feature vs Bugs

69%Features

Repository Contributions

215Total
Bugs
33
Commits
215
Features
74
Lines of code
101,700
Activity Months13

Work History

November 2025

1 Commits • 1 Features

Nov 1, 2025

November 2025 monthly summary for viduni94/kibana: Focused on cleaning up esql-utils to streamline the utility library and reduce maintenance surface.

October 2025

28 Commits • 16 Features

Oct 1, 2025

October 2025 summary for viduni94/kibana: Focused on stabilizing ES|QL core controls, expanding discovery capabilities, and reducing latency. Key outcomes include stabilizing ES|QL controls and query handling, implementing solution-recommended queries, enabling time_series datastream lookup lookups, improving histogram accuracy with BUCKET, and optimizing async search latency by removing minimize roundtrips. These efforts improved data exploration reliability, search performance, and dashboard correctness, delivering measurable business value for analysts and engineers.

September 2025

23 Commits • 13 Features

Sep 1, 2025

September 2025 (viduni94/kibana) delivered a focused set of ES|QL, Lens, and Discover enhancements and reliability fixes, accelerating query discovery, navigation, and multi-cluster workflows while improving stability and documentation.

August 2025

8 Commits • 2 Features

Aug 1, 2025

Monthly performance summary for 2025-08 for viduni94/kibana, focusing on business value delivered through features, reliability, and maintainability. Highlights include UI/UX refinements for the ES|QL editor, architecture cleanups, and robust indexing validation, delivering measurable improvements in developer productivity and editor stability.

July 2025

17 Commits • 5 Features

Jul 1, 2025

July 2025 performance highlights focused on solidifying ES|QL foundation, expanding analytics capabilities, and improving developer experience across two repositories (viduni94/kibana and elastic/monaco-esql). Key work included a centralized ES|QL Commands Registry with migration from legacy RRF to FUSE, validation/autocomplete refactors, and test architecture updates; new Time Series (TS) aggregation support; Editor UX/autocomplete enhancements; and stability/performance fixes in validation, licensing, and categorization. An initial CI/CD bootstrap was established for the monorepo to enable faster, safer deployments.

June 2025

28 Commits • 7 Features

Jun 1, 2025

June 2025 monthly summary for viduni94/kibana: Focused on accelerating the ES|QL editor experience, strengthening reliability, and expanding testing to support rapid delivery. Delivered several high-impact features, fixed critical stability issues, and improved developer experience, setting the stage for scalable extensions and clearer documentation. Business value delivered includes more accurate query recommendations, smoother editor interactions, and reduced risk of cascading errors in production.

May 2025

15 Commits • 5 Features

May 1, 2025

May 2025: Kibana (viduni94/kibana) delivered targeted ES|QL improvements, dashboard-level controls, and reliability fixes that reduce friction in data exploration and editing workflows. The month emphasized developer productivity, query building accuracy, and stability in data discovery, translating into measurable business value for monitoring, analytics, and ML feature workflows.

April 2025

20 Commits • 1 Features

Apr 1, 2025

April 2025 (2025-04) focused on strengthening Kibana's ES|QL capabilities in viduni94/kibana with a balance of feature delivery, reliability improvements, and maintainability work. Key features delivered include a comprehensive upgrade to ES|QL autocomplete and validation, introducing NULL predicate support, refreshed metadata, and enhanced variable handling and query editing to improve user experience and reduce query errors. Parallel efforts stabilized the ES|QL functional tests, reducing flakiness and increasing confidence in release outcomes. Internal maintenance and refactor activities migrated code ownership, consolidated types, and renamed components to simplify future development. A Lens visualization fix ensures dashboards render gracefully when data is empty, preventing broken experiences on edge cases. Together, these efforts improve data exploration reliability, developer velocity, and the foundational quality of Kibana’s ES|QL tooling, enabling faster and safer future iterations.

March 2025

32 Commits • 7 Features

Mar 1, 2025

March 2025 monthly summary: Delivered substantial ES|QL improvements across three Kibana repositories (KDKHD/kibana, YulNaumenko/kibana, Zacqary/kibana) with a strong focus on business value, reliability, and developer productivity. Key features were shipped with substantial UX and data-type improvements, while critical bugs were fixed to prevent incorrect visualizations and erroneous warnings. The work strengthens query authoring, safety of visualizations, and extensibility for dynamic queries, setting the stage for more confident dashboards and faster iteration.

February 2025

14 Commits • 3 Features

Feb 1, 2025

February 2025 monthly summary for KDKHD/kibana: Delivered a cohesive set of ES|QL tooling improvements, Discover/Lens UX enhancements, and robust chart controls, with concrete commits across ES|QL tooling, Discover/Lens UX, and chart features. The work improves developer experience, dashboard stability, and data exploration performance. Highlights include error handling and parsing improvements, persistent visualization state across time ranges, and dynamic, accurate data exploration in dashboards.

January 2025

16 Commits • 8 Features

Jan 1, 2025

January 2025 monthly summary for KDKHD/kibana: Delivered core ES|QL enhancements, editor reliability improvements, and expanded dashboard variable support that collectively boost developers' productivity, data discoverability, and dashboard dynamism. The work emphasizes business value through faster, more accurate query authoring, robust data exports, and reduced maintenance burden from UI styling migrations and reliable mode transitions.

December 2024

7 Commits • 2 Features

Dec 1, 2024

December 2024 — Kibana (KDKHD/kibana) delivered core UX improvements for the ES|QL Editor, expanded language capabilities, and reinforced stability across editing and history features. Focus areas included accessibility and usability enhancements, reliable multi-line editing, and caching resilience. Notable outcomes include the introduction of new ES|QL functions (st_envelope, st_xmax, st_xmin, st_ymax, st_ymin, term), safer command autocomplete, and improved dark-mode readability. These changes reduce onboarding time, prevent accidental command overwrites, and enable broader ES|QL usage across teams.

November 2024

6 Commits • 4 Features

Nov 1, 2024

Month 2024-11: Delivered multiple ES|QL enhancements across tkajtoch/kibana and KDKHD/kibana, focusing on accuracy, usability, and precision. Key outcomes include improved command/documentation clarity, proactive user guidance via autocomplete safeguards, explicit tech-preview labeling to manage feature risk, and date_nanos support enabling high-precision date-time operations. These changes reduce user errors, accelerate adoption of ES|QL features, and improve test coverage and documentation quality.

Activity

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Quality Metrics

Correctness91.2%
Maintainability90.0%
Architecture86.4%
Performance83.6%
AI Usage21.4%

Skills & Technologies

Programming Languages

ANTLR grammarBashCSSJSXJavaJavaScriptMarkdownSCSSShellTypeScript

Technical Skills

ANTLRAPI DesignAPI DevelopmentAPI IntegrationAST ManipulationAST ParsingAccessibilityAsynchronous ProgrammingAutocompleteAutocomplete DevelopmentAutocomplete SystemsAutocomplete functionalityBackend DevelopmentBackend developmentBash Scripting

Repositories Contributed To

6 repos

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

viduni94/kibana

Apr 2025 Nov 2025
8 Months active

Languages Used

CSSJavaScriptTypeScriptYAMLtsxJavaShell

Technical Skills

API DevelopmentAutocompleteBackend DevelopmentCSSCode GenerationCode Organization

KDKHD/kibana

Nov 2024 Mar 2025
5 Months active

Languages Used

JavaScriptSCSSTypeScriptMarkdownANTLR grammarJSX

Technical Skills

API DevelopmentBackend DevelopmentCode GenerationDocumentationES|QLEditor Features

Zacqary/kibana

Mar 2025 Mar 2025
1 Month active

Languages Used

ANTLR grammarJavaScriptTypeScript

Technical Skills

ANTLRAPI DevelopmentAccessibilityBackend DevelopmentCode ParsingComponent Refactoring

YulNaumenko/kibana

Mar 2025 Mar 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

Backend DevelopmentBackend developmentCode FormattingCode GenerationCode RefactoringDocumentation

tkajtoch/kibana

Nov 2024 Nov 2024
1 Month active

Languages Used

TypeScript

Technical Skills

Codebase ImprovementDocumentation

elastic/monaco-esql

Jul 2025 Jul 2025
1 Month active

Languages Used

BashYAML

Technical Skills

Bash ScriptingBuildkiteCI/CDDevOps

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