chatmail/core
Oct 2024 – Oct 2025
13 Months active
Languages Used
RustEmailPythonSQLTypeScriptCPlain TextC++
Technical Skills
Backend DevelopmentData StorageDatabase InteractionMessage HandlingRustSecurity
iequidoo
PROFILE
Iequidoo
Dmitry Greshilov developed and maintained the chatmail/core backend over 13 months, delivering features and fixes that enhanced privacy, reliability, and cross-device consistency in messaging workflows. He engineered robust group chat management, message parsing, and synchronization logic, applying Rust and SQL to optimize database migrations, concurrency, and data integrity. His work included API modernization, secure contact handling, and resilient media processing, addressing edge cases in encryption, timezones, and error recovery. By refactoring core modules and expanding test coverage, Dmitry improved maintainability and reduced regression risk. The depth of his contributions ensured stable, privacy-focused communication for diverse client environments.
Overall Statistics
Feature vs Bugs
60%Features
Repository Contributions
115Total
Bugs
22
Commits
115
Features
33
Lines of code
5,935
Activity Months13
Your Network
15 people
Work History
October 2025
5 Commits • 3 Features
Oct 1, 2025October 2025 monthly summary for chatmail/core focusing on delivering robust data handling, UX consistency, and API/UI color coherence. The month emphasized reliability, privacy, and measurable business value through a set of targeted improvements across parsing, UI state management, image handling, and API consistency. Key achievements were delivered with solid impact on reliability, user experience, and developer velocity.
5 Commits • 3 Features
Oct 1, 2025October 2025 monthly summary for chatmail/core focusing on delivering robust data handling, UX consistency, and API/UI color coherence. The month emphasized reliability, privacy, and measurable business value through a set of targeted improvements across parsing, UI state management, image handling, and API consistency. Key achievements were delivered with solid impact on reliability, user experience, and developer velocity.
October 2025
September 2025
9 Commits • 3 Features
Sep 1, 2025September 2025 highlights for chatmail/core: Delivered cross-device encrypted group creation synchronization with backward compatibility to older Delta Chat clients; improved media handling with EXIF preservation for stickers and dimensions for outgoing stickers; and boosted performance by excluding unknown folders during message fetch. Implemented key reliability and correctness fixes across Outbox, Autocrypt, and receive-error handling, enhancing security, interoperability, and robustness. These changes deliver tangible business value through stronger security, better UX, and reduced support overhead.
September 2025
9 Commits • 3 Features
Sep 1, 2025September 2025 highlights for chatmail/core: Delivered cross-device encrypted group creation synchronization with backward compatibility to older Delta Chat clients; improved media handling with EXIF preservation for stickers and dimensions for outgoing stickers; and boosted performance by excluding unknown folders during message fetch. Implemented key reliability and correctness fixes across Outbox, Autocrypt, and receive-error handling, enhancing security, interoperability, and robustness. These changes deliver tangible business value through stronger security, better UX, and reduced support overhead.
August 2025
20 Commits • 5 Features
Aug 1, 2025August 2025 monthly summary for chatmail/core: Delivered stability-focused updates across dependencies, storage, UI, verification, diagnostics, and docs. Emphasized business value through increased reliability, performance, and user experience, enabling smoother upgrades, fewer outages, and clearer developer guidance.
20 Commits • 5 Features
Aug 1, 2025August 2025 monthly summary for chatmail/core: Delivered stability-focused updates across dependencies, storage, UI, verification, diagnostics, and docs. Emphasized business value through increased reliability, performance, and user experience, enabling smoother upgrades, fewer outages, and clearer developer guidance.
August 2025
July 2025
12 Commits • 2 Features
Jul 1, 2025Month: 2025-07 - Consolidated the core messaging work in chatmail/core with a focus on privacy, reliability, and performance. Key features and bug fixes delivered: Key features delivered - Group Chat Privacy and User-facing Data Handling Improvements: Restricted changes to chat name/avatar to authenticated members; improved media filename handling to preserve privacy and consistency across devices. Commits: 374a5ef687430f449aebf7bf99ba85d0cbd4b727 (feat: Don't apply chat name and avatar changes from non-members), 75b7bea78fd5eaff745a085db9bb915ec524d739 (fix: Decide on filename used for sending depending on the original Viewtype). - Internal Messaging Stability, Migrations, and Performance Improvements: Refactored key contacts migration, implemented periodic migrations with state tracking, batching for message prefetching, removal of deprecated chat states, function naming simplifications, optimized key contact loading, and adjusted recipient ordering for new members. Commits include a87ee030fcfd3315d873d255dd91bc0a19fdd4af, 389649ea8a87489b04e5683d4cb4707e27932524, 481f5cae2215ebbc4005617de99a1dcf82e88945, 779f58ab16e67361cfe6b8af0299cda9f4cb0080, 78b7715ea6d6d0de702c57a58c78a6e37282116f, db247d9f9a43184ae68dc5422f240fe5e0905f7b, 58b99f59f75d7938e0bc3381465861248dd97683, 8fc6ea19b45c0a6579239d09afbd7620c1362229, d6af8d25267a4d0c4ea08d34a4b553e12a598391. Major bugs fixed - Timezone-aware Day Markers in Chat Messages: Fix day marker display by reporting local midnight instead of UTC midnight to ensure correct date representation across time zones. Commit: c218c05b96a051038fedb7c8f10cf8663956ff91 (fix: get_chat_msgs_ex(): Report local midnight in ChatItem::DayMarker). - Additional migration and prefetch fixes: migrate_key_contacts(): Remove "id>9" from encrypted messages SELECT; Save msgs to key-contacts migration state and run migration periodically; Prefetch messages in limited batches. Commits: a87ee030fcfd3315d873d255dd91bc0a19fdd4af, 389649ea8a87489b04e5683d4cb4707e27932524, 481f5cae2215ebbc4005617de99a1dcf82e88945. Overall impact and accomplishments - Privacy by design: stronger access controls for chat name/avatar and consistent media handling reduce leakage risk across devices and sessions. - Timezone correctness: local midnight reporting ensures accurate day boundaries in global teams, improving UX and accountability. - Stability and throughput: migration hygiene, batched message prefetching, and removal of deprecated states reduce edge-case failures and improve UI responsiveness. - Observability and maintenance: explicit debug assertion logging and clearer function naming reduce debugging effort and ease future changes. Technologies and skills demonstrated - Privacy and security design in feature scope, timezone-aware data handling, and robust data migrations. - Performance optimization via batching, prefetch improvements, and selective loading. - Code quality improvements including refactoring, clearer naming, and enhanced logging/debug paths. - Cross-functional collaboration signals through coordinated commits across migration, prefetching, and UI-facing privacy changes.
July 2025
12 Commits • 2 Features
Jul 1, 2025Month: 2025-07 - Consolidated the core messaging work in chatmail/core with a focus on privacy, reliability, and performance. Key features and bug fixes delivered: Key features delivered - Group Chat Privacy and User-facing Data Handling Improvements: Restricted changes to chat name/avatar to authenticated members; improved media filename handling to preserve privacy and consistency across devices. Commits: 374a5ef687430f449aebf7bf99ba85d0cbd4b727 (feat: Don't apply chat name and avatar changes from non-members), 75b7bea78fd5eaff745a085db9bb915ec524d739 (fix: Decide on filename used for sending depending on the original Viewtype). - Internal Messaging Stability, Migrations, and Performance Improvements: Refactored key contacts migration, implemented periodic migrations with state tracking, batching for message prefetching, removal of deprecated chat states, function naming simplifications, optimized key contact loading, and adjusted recipient ordering for new members. Commits include a87ee030fcfd3315d873d255dd91bc0a19fdd4af, 389649ea8a87489b04e5683d4cb4707e27932524, 481f5cae2215ebbc4005617de99a1dcf82e88945, 779f58ab16e67361cfe6b8af0299cda9f4cb0080, 78b7715ea6d6d0de702c57a58c78a6e37282116f, db247d9f9a43184ae68dc5422f240fe5e0905f7b, 58b99f59f75d7938e0bc3381465861248dd97683, 8fc6ea19b45c0a6579239d09afbd7620c1362229, d6af8d25267a4d0c4ea08d34a4b553e12a598391. Major bugs fixed - Timezone-aware Day Markers in Chat Messages: Fix day marker display by reporting local midnight instead of UTC midnight to ensure correct date representation across time zones. Commit: c218c05b96a051038fedb7c8f10cf8663956ff91 (fix: get_chat_msgs_ex(): Report local midnight in ChatItem::DayMarker). - Additional migration and prefetch fixes: migrate_key_contacts(): Remove "id>9" from encrypted messages SELECT; Save msgs to key-contacts migration state and run migration periodically; Prefetch messages in limited batches. Commits: a87ee030fcfd3315d873d255dd91bc0a19fdd4af, 389649ea8a87489b04e5683d4cb4707e27932524, 481f5cae2215ebbc4005617de99a1dcf82e88945. Overall impact and accomplishments - Privacy by design: stronger access controls for chat name/avatar and consistent media handling reduce leakage risk across devices and sessions. - Timezone correctness: local midnight reporting ensures accurate day boundaries in global teams, improving UX and accountability. - Stability and throughput: migration hygiene, batched message prefetching, and removal of deprecated states reduce edge-case failures and improve UI responsiveness. - Observability and maintenance: explicit debug assertion logging and clearer function naming reduce debugging effort and ease future changes. Technologies and skills demonstrated - Privacy and security design in feature scope, timezone-aware data handling, and robust data migrations. - Performance optimization via batching, prefetch improvements, and selective loading. - Code quality improvements including refactoring, clearer naming, and enhanced logging/debug paths. - Cross-functional collaboration signals through coordinated commits across migration, prefetching, and UI-facing privacy changes.
June 2025
15 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for chatmail/core: Delivered API improvements and data-handling enhancements, including flexible group chat creation/encryption, expanded contact listings, and a donations-driven engagement prompt. Implemented robust media handling and data parsing fixes, plus internal refactors to improve reliability and maintainability. Resulted in stronger security posture, higher data integrity, and increased developer velocity through better tests and migrations.
15 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for chatmail/core: Delivered API improvements and data-handling enhancements, including flexible group chat creation/encryption, expanded contact listings, and a donations-driven engagement prompt. Implemented robust media handling and data parsing fixes, plus internal refactors to improve reliability and maintainability. Resulted in stronger security posture, higher data integrity, and increased developer velocity through better tests and migrations.
June 2025
May 2025
1 Commits
May 1, 2025Concise monthly summary for May 2025 focusing on avatar/profile data handling in group leave messages within chatmail/core. The work emphasizes testing and data consistency in user identity propagation during group chat events.
May 2025
1 Commits
May 1, 2025Concise monthly summary for May 2025 focusing on avatar/profile data handling in group leave messages within chatmail/core. The work emphasizes testing and data consistency in user identity propagation during group chat events.
April 2025
4 Commits
Apr 1, 2025April 2025 monthly summary for chatmail/core focusing on stabilizing message state, ensuring data consistency after group promotions, and strengthening test coverage for broadcast workflows. Delivered targeted fixes with clear commit hygiene, plus tests that reduce regression risk and support reliable user experience across messaging scenarios.
4 Commits
Apr 1, 2025April 2025 monthly summary for chatmail/core focusing on stabilizing message state, ensuring data consistency after group promotions, and strengthening test coverage for broadcast workflows. Delivered targeted fixes with clear commit hygiene, plus tests that reduce regression risk and support reliable user experience across messaging scenarios.
April 2025
March 2025
9 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for chatmail/core focusing on hardening header processing, MIME parsing, and Autocrypt flows while delivering tangible code quality improvements and safer messaging behavior. Key outcomes include delivered header-focused refactor, robust MIME header precedence, safer self-sent behavior, and readability improvements that reduce future maintenance burden.
March 2025
9 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for chatmail/core focusing on hardening header processing, MIME parsing, and Autocrypt flows while delivering tangible code quality improvements and safer messaging behavior. Key outcomes include delivered header-focused refactor, robust MIME header precedence, safer self-sent behavior, and readability improvements that reduce future maintenance burden.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on business value and technical achievements for chatmail/core. Implemented a timestamp-based last-write-wins strategy for chat group name updates, and stabilized inbox synchronization timing by routing sync messages through the inbox loop. These changes improve data consistency across devices, reduce race conditions, and enhance maintainability and observability.
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on business value and technical achievements for chatmail/core. Implemented a timestamp-based last-write-wins strategy for chat group name updates, and stabilized inbox synchronization timing by routing sync messages through the inbox loop. These changes improve data consistency across devices, reduce race conditions, and enhance maintainability and observability.
February 2025
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for chatmail/core focusing on delivering robust MDN-aware message sending and cross-device synchronization improvements. Key changes strengthened routing reliability and multi-device consistency while reducing code complexity.
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for chatmail/core focusing on delivering robust MDN-aware message sending and cross-device synchronization improvements. Key changes strengthened routing reliability and multi-device consistency while reducing code complexity.
December 2024
19 Commits • 7 Features
Dec 1, 2024December 2024: Delivered a focused set of features and reliability improvements across chatmail/core, translating into clearer user experiences, faster feedback loops, and stronger data handling. Key outcomes include enhanced message rendering, reduced group-chat noise, refined encryption defaults, proactive backup progress visibility, and broader internal reliability hardening. This work reinforces business value through improved usability, reduced support needs, and more robust backend processes.
19 Commits • 7 Features
Dec 1, 2024December 2024: Delivered a focused set of features and reliability improvements across chatmail/core, translating into clearer user experiences, faster feedback loops, and stronger data handling. Key outcomes include enhanced message rendering, reduced group-chat noise, refined encryption defaults, proactive backup progress visibility, and broader internal reliability hardening. This work reinforces business value through improved usability, reduced support needs, and more robust backend processes.
December 2024
November 2024
13 Commits • 5 Features
Nov 1, 2024November 2024 monthly summary for chatmail/core focusing on reliability, privacy, and performance improvements. Implemented event emission optimizations for messaging and membership changes; hardened SMTP messaging against race conditions; fortified AEAP transition safety to preserve encryption state and ensure 1:1 chat availability where appropriate; optimized status update pathways with deferred DB queries and deduplicated webxdc notifications; enabled reliable chat actions before the first message by creating implicit contacts, improving UX for accept/block workflows.
November 2024
13 Commits • 5 Features
Nov 1, 2024November 2024 monthly summary for chatmail/core focusing on reliability, privacy, and performance improvements. Implemented event emission optimizations for messaging and membership changes; hardened SMTP messaging against race conditions; fortified AEAP transition safety to preserve encryption state and ensure 1:1 chat availability where appropriate; optimized status update pathways with deferred DB queries and deduplicated webxdc notifications; enabled reliable chat actions before the first message by creating implicit contacts, improving UX for accept/block workflows.
October 2024
3 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary for chatmail/core: Focused on reliability, privacy, and data integrity. Delivered key privacy enhancement for QR code-based contacts and critical messaging fixes to preserve full text, and correct read receipt behavior for not-yet-downloaded messages.
3 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary for chatmail/core: Focused on reliability, privacy, and data integrity. Delivered key privacy enhancement for QR code-based contacts and critical messaging fixes to preserve full text, and correct read receipt behavior for not-yet-downloaded messages.
October 2024
Activity
Loading activity data...
Quality Metrics
Correctness89.0%
Maintainability85.8%
Architecture83.4%
Performance82.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
CC++EmailPlain TextPythonRustSQLTOMLTypeScript
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAsynchronous ProgrammingBackend DevelopmentBug FixingCachingCargoChat Application DevelopmentChat SystemsCode CleanupCode MaintenanceCode OptimizationCode ReadabilityCommand Line Interface
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline