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Marjan Kalanaki

PROFILE

Marjan Kalanaki

Marjan Kalanaki developed and enhanced content rendering systems across the guardian/dotcom-rendering and guardian/frontend repositories, focusing on gallery, sports, and live data experiences. Leveraging TypeScript, React, and Scala, Marjan delivered features such as immersive gallery layouts with lightbox support, robust football and cricket data models, and accessible, API-driven endpoints. The work included UI/UX improvements, schema extensions, and backend optimizations to streamline data payloads and ensure reliable cross-platform rendering. Marjan’s approach emphasized maintainable code, responsive design, and observability, resulting in scalable, testable solutions that improved user engagement, reduced integration errors, and enabled faster iteration for editorial and product teams.

Overall Statistics

Feature vs Bugs

70%Features

Repository Contributions

236Total
Bugs
31
Commits
236
Features
74
Lines of code
35,863
Activity Months13

Work History

October 2025

20 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary focused on delivering a cohesive and reliable gallery experience, improving visual UX, data wiring, and robustness, while keeping configuration clean and maintainable. The work reduced render failures, improved user engagement with More Galleries, and strengthened observability and code quality across the dotcom-rendering repo.

September 2025

13 Commits • 5 Features

Sep 1, 2025

September 2025 monthly summary for Guardian projects focused on delivering richer content experiences, stabilizing the rendering stack, and enabling scalable enhancements across guardian/frontend and guardian/dotcom-rendering. The month emphasized delivering business value through richer trail metadata, improved gallery discovery, and more reliable UI behavior across breakpoints, with a strong emphasis on maintainable code, predictable performance, and testing. Key achievements include:

August 2025

14 Commits • 3 Features

Aug 1, 2025

August 2025: Delivered cross-repo enhancements focused on immersive gallery experiences, reader engagement, monetization, and rendering reliability across Guardian web/app surfaces. Key outcomes include Lightbox enhancements for galleries, layout and engagement improvements, main media stability fixes, and a DCR-driven render path for Most Viewed Galleries.

July 2025

44 Commits • 14 Features

Jul 1, 2025

July 2025 monthly performance summary for guardian web platforms. Delivered notable features across dotcom-rendering and frontend, improved preview performance and UX, and strengthened quality and maintainability. Key outcomes include a new football matches atom with euro 2025 schema and styling, enhanced gallery experiences with a lightbox, layout decisions and captions, and broader share/affiliate handling; optimized background job scheduling in preview environments; and several UI polish and documentation improvements that reduce noise and improve observability.

June 2025

40 Commits • 12 Features

Jun 1, 2025

June 2025 monthly summary: Delivered cross-repo features and stability improvements across guardian/frontend and guardian/dotcom-rendering, focusing on user experience, accessibility, and maintainability. The work combined new audience-facing features with API cleanups and performance optimizations to reduce payloads and simplify maintenance, while strengthening theming and metadata for gallery content.

May 2025

12 Commits • 8 Features

May 1, 2025

Month: 2025-05 — This month delivered core Gallery improvements, strengthened sports data architecture, and enhanced DCAR data feeds, delivering measurable business value through richer content experiences, accessibility, and more reliable data endpoints. Highlights span cross-repo gallery enhancements, web UI Masthead integration, sports frontend data/config upgrades, and robust no-JS fallbacks for better resilience.

April 2025

14 Commits • 5 Features

Apr 1, 2025

April 2025 monthly summary focusing on delivering DCR-based rendering capabilities, data model enrichments, and JSON cleanup across guardian/frontend and guardian/dotcom-rendering. Highlights include new cricket data model and endpoint, enhanced football data model with team URLs and identifiers, DCR support for football tables (competition/group pages) with pageId, and JSON pruning to produce cleaner responses. Additionally, targeted cleanup and deprecation of outdated endpoints/tests and removal of an interactive atom to simplify rendering and reduce maintenance. Business value realized includes improved rendering fidelity, data integrity, faster UI updates, and lower support overhead.

March 2025

20 Commits • 6 Features

Mar 1, 2025

March 2025 highlights across guardian/dotcom-rendering and guardian/frontend focused on delivering improved football data experiences, increasing production reliability, and strengthening observability and testing. Delivered key features for football data pages, rolled out DCR football support, fixed routing issues, and expanded data modeling and JSON endpoints, all while improving test coverage and traceability.

February 2025

24 Commits • 7 Features

Feb 1, 2025

February 2025 highlights focused on observability, rendering performance, and data-model simplification across guardian/frontend and guardian/dotcom-rendering. Delivered unified Request ID tracing, remote rendering for football live pages, and data-model cleanups, while strengthening test reliability and standardizing logging across services. These changes enabled faster incident response, a more resilient user experience for dynamic football content, and simpler maintenance of downstream data pipelines.

January 2025

11 Commits • 6 Features

Jan 1, 2025

January 2025 monthly summary for guardian/dotcom-rendering and guardian/frontend. Focused on delivering business value through dependency upgrades, feature gating to improve UX reliability, and enhanced observability, while maintaining code quality and simplifying data payloads. Key improvements span performance, security, and developer experience across both repositories.

December 2024

7 Commits • 4 Features

Dec 1, 2024

December 2024 performance summary for guardian/frontend and guardian/dotcom-rendering. Delivered business-value-oriented improvements to DCR live football data: a new DCR-optimized JSON endpoint with backward-compatible requests and a new LiveScores model/serializer, enabling leaner payloads for Dotcom Rendering. Expanded the DCR data model with pagination (nextPage) and nation context in CompetitionSummary, and updated related controllers/components for seamless integration. Strengthened mobile UX and reliability on Android WebView through targeted rendering touch handling for the Apps carousel, and fixes to ensure consistent reader revenue banner visibility. Completed code-quality enhancements including import/type organization and non-awaited promise handling for maintainability. These changes collectively improve data accuracy, rendering performance, mobile experience, and long-term maintainability.

November 2024

16 Commits • 3 Features

Nov 1, 2024

November 2024 (guardian/dotcom-rendering) monthly summary focusing on key accomplishments, business value, and technical achievements. Key achievements (top 4): - Apps-aware URL handling for KeyEvents and Pagination: centralized URL construction, correct app-origin requests, and improved URL param management (commits include 2c7f8d4, d51f8b9f, 39059bd, d4bf965b, 90537e10, 075c23e8). - KeyEventsCarousel touch interactions and platform gating: enhanced touch events, debouncing adjustments, and cross-platform activation checks; updated to use useMemo/useMemo patterns and ensure rendering-target gating (commits include c94d2522, fe151d9c, ffb2e25a, 687ef037, 72149686, 31bca786). - Newsletter grouping updates (Fighting Back): added fighting-back newsletter to grouping and US Get Started group (commits 76444326, a1f123b1). - Code quality improvements and refactoring: lint fixes and import reordering to improve consistency (commits 5bd68b52, a99ccd96).

October 2024

1 Commits

Oct 1, 2024

Month: 2024-10 — Delivered a critical bug fix for YoutubeAtomPlayer external fullscreen binary compatibility in the guardian/dotcom-rendering repository. Converted the external_fullscreen field to a binary representation (1/0) to align with downstream systems that expect binary input, reducing integration errors and improving interoperability across media playback components. Resulted in more stable fullscreen handling and smoother integration with external services.

Activity

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Quality Metrics

Correctness89.6%
Maintainability90.0%
Architecture87.0%
Performance85.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

CSSHTMLJavaJavaScriptScalaTypeScriptYAMLyaml

Technical Skills

API DevelopmentAPI IntegrationAsynchronous ProgrammingBackend DevelopmentCSSCSS GridCSS Grid LayoutCSS StylingCSS-in-JSCachingCloud ComputingComponent DesignComponent DevelopmentComponent StorybookComponent Testing

Repositories Contributed To

2 repos

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

guardian/dotcom-rendering

Oct 2024 Oct 2025
13 Months active

Languages Used

TypeScriptJavaScriptYAMLyamlCSSHTML

Technical Skills

Front End DevelopmentReactTypeScriptFrontend DevelopmentMobile DevelopmentBackend Development

guardian/frontend

Dec 2024 Sep 2025
10 Months active

Languages Used

JavaScalaJavaScriptHTML

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentController LogicJSON SerializationDependency Management

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