esl/MongooseIM
Nov 2024 – Mar 2025
5 Months active
Languages Used
ErlangMakefileShellMarkdownSQL
Technical Skills
Backend DevelopmentConfiguration ManagementDebuggingDistributed SystemsErlangErlang Development
Mikhail Uvarov
PROFILE
Mikhail Uvarov
Arcus Felis engineered reliability, security, and observability improvements for the esl/MongooseIM repository, focusing on distributed Erlang backends. Over five months, Arcus delivered features such as robust token-based authentication with server-initiated rotation, enhanced TLS listener support, and cluster-safe Redis integration. Their work included SQL schema updates for CockroachDB and MSSQL, expanded logging for XMPP IQ stanzas, and test automation refinements to stabilize CI pipelines. Using Erlang, SQL, and Shell scripting, Arcus addressed operational pain points by improving startup/shutdown flows, reducing log noise, and ensuring compatibility with evolving database and protocol standards, demonstrating depth in backend and distributed systems engineering.
Overall Statistics
Feature vs Bugs
71%Features
Repository Contributions
107Total
Bugs
19
Commits
107
Features
46
Lines of code
4,170
Activity Months5
Work History
March 2025
5 Commits • 2 Features
Mar 1, 2025March 2025: Focused on reliability, observability, and compatibility in esl/MongooseIM. Key outcomes include enhanced IQ logging for faster diagnosis of malformed or unexpected stanzas, stabilized CI/testing for MSSQL environments, and alignment with MySQL 8 by removing deprecated query cache settings. These changes reduce operational toil, improve developer experience, and strengthen customer trust through more predictable behavior and diagnostics.
5 Commits • 2 Features
Mar 1, 2025March 2025: Focused on reliability, observability, and compatibility in esl/MongooseIM. Key outcomes include enhanced IQ logging for faster diagnosis of malformed or unexpected stanzas, stabilized CI/testing for MSSQL environments, and alignment with MySQL 8 by removing deprecated query cache settings. These changes reduce operational toil, improve developer experience, and strengthen customer trust through more predictable behavior and diagnostics.
March 2025
February 2025
25 Commits • 8 Features
Feb 1, 2025February 2025 monthly summary for esl/MongooseIM: Delivered significant TLS, authentication, and operational improvements, alongside dependency upgrades and CI/stability work. The work emphasizes business value through stronger security, improved authentication flows, and more maintainable code, while showcasing solid performance engineering and reliable release readiness.
February 2025
25 Commits • 8 Features
Feb 1, 2025February 2025 monthly summary for esl/MongooseIM: Delivered significant TLS, authentication, and operational improvements, alongside dependency upgrades and CI/stability work. The work emphasizes business value through stronger security, improved authentication flows, and more maintainable code, while showcasing solid performance engineering and reliable release readiness.
January 2025
34 Commits • 11 Features
Jan 1, 2025January 2025 – Consolidated token-based authentication improvements and SQL integration across esl/MongooseIM, delivering security, reliability, and deployment flexibility. Key features delivered include server-initiated token rotation and lifecycle with expiry handling and slot management, expanded authentication flow with credentials passing to sasl2_success and support for HT-SHA-3-512-NONE, and extensive refactoring with utilities, type safety, and clearer naming. These changes reduce token misuse risk, improve test reliability, and streamline future maintenance. Top achievements included: - Token rotation and lifecycle: server-initiated rotation, expiry handling, slot management, and tests (commits include Add Server initiates token rotation; Add token invalidation; Add tests for server-initiated token rotation in the current slot). - Authentication enhancements: passing credentials into sasl2_success and addition of HT-SHA-3-512-NONE method. - Reliability and test improvements: token expiration logic, fixes for test timeouts, and use of crypto:hash_equals for secure hash comparisons. - SQL integration: fast_auth_token pledged into CockroachDB SQL and MSSQL schema fixes, with debug logging removal. - Code quality and typing: refactors (time_helper, map-based request parsing, map attributes) and Type annotations for fast_info; module/mechanism plumbing refinements.
34 Commits • 11 Features
Jan 1, 2025January 2025 – Consolidated token-based authentication improvements and SQL integration across esl/MongooseIM, delivering security, reliability, and deployment flexibility. Key features delivered include server-initiated token rotation and lifecycle with expiry handling and slot management, expanded authentication flow with credentials passing to sasl2_success and support for HT-SHA-3-512-NONE, and extensive refactoring with utilities, type safety, and clearer naming. These changes reduce token misuse risk, improve test reliability, and streamline future maintenance. Top achievements included: - Token rotation and lifecycle: server-initiated rotation, expiry handling, slot management, and tests (commits include Add Server initiates token rotation; Add token invalidation; Add tests for server-initiated token rotation in the current slot). - Authentication enhancements: passing credentials into sasl2_success and addition of HT-SHA-3-512-NONE method. - Reliability and test improvements: token expiration logic, fixes for test timeouts, and use of crypto:hash_equals for secure hash comparisons. - SQL integration: fast_auth_token pledged into CockroachDB SQL and MSSQL schema fixes, with debug logging removal. - Code quality and typing: refactors (time_helper, map-based request parsing, map attributes) and Type annotations for fast_info; module/mechanism plumbing refinements.
January 2025
December 2024
31 Commits • 20 Features
Dec 1, 2024December 2024 monthly summary for esl/MongooseIM. This period focused on boosting observability, reliability, and startup/shutdown stability in distributed MongooseIM deployments, while curbing log noise to improve operator efficiency. Key features delivered include enabling ct_mongoose_log_hook for mim2/mim3, restricting log_hook logging to suite start/stop events to reduce noise, introducing practical debugging wrappers (cets_long:run_tracked/2) for mongooseim and ejabberd_sup, and enhancing startup/shutdown visibility via mnesia progress reporting and explicit logging controls. The changes deliver tangible business value by improving signal-to-noise in logs, accelerating issue triage, and stabilizing runtime behavior in heterogeneous environments. Technologies/skills demonstrated include Erlang/MongooseIM deployment practices, ct hooks and instrumentation, mnesia monitoring, log management, and distributed-system debugging utilities.
December 2024
31 Commits • 20 Features
Dec 1, 2024December 2024 monthly summary for esl/MongooseIM. This period focused on boosting observability, reliability, and startup/shutdown stability in distributed MongooseIM deployments, while curbing log noise to improve operator efficiency. Key features delivered include enabling ct_mongoose_log_hook for mim2/mim3, restricting log_hook logging to suite start/stop events to reduce noise, introducing practical debugging wrappers (cets_long:run_tracked/2) for mongooseim and ejabberd_sup, and enhancing startup/shutdown visibility via mnesia progress reporting and explicit logging controls. The changes deliver tangible business value by improving signal-to-noise in logs, accelerating issue triage, and stabilizing runtime behavior in heterogeneous environments. Technologies/skills demonstrated include Erlang/MongooseIM deployment practices, ct hooks and instrumentation, mnesia monitoring, log management, and distributed-system debugging utilities.
November 2024
12 Commits • 5 Features
Nov 1, 2024November 2024 monthly summary for esl/MongooseIM focused on reliability, availability, observability, and code clarity in distributed deployments. Delivered a set of features and refactors across shutdown handling, cluster Redis separation, logging enhancements, WebSocket testing coverage, and naming clarity. These changes drive business value through higher uptime during maintenance, reduced risk of message loss in cluster routing, faster troubleshooting, and more robust WebSocket/component handling.
12 Commits • 5 Features
Nov 1, 2024November 2024 monthly summary for esl/MongooseIM focused on reliability, availability, observability, and code clarity in distributed deployments. Delivered a set of features and refactors across shutdown handling, cluster Redis separation, logging enhancements, WebSocket testing coverage, and naming clarity. These changes drive business value through higher uptime during maintenance, reduced risk of message loss in cluster routing, faster troubleshooting, and more robust WebSocket/component handling.
November 2024
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Quality Metrics
Correctness87.8%
Maintainability87.2%
Architecture85.2%
Performance77.8%
AI Usage20.6%
Skills & Technologies
Programming Languages
ErlangMakefileMarkdownSQLShell
Technical Skills
API DevelopmentAPI SecurityApplication MonitoringAuthenticationBackend DevelopmentBuild SystemBuild SystemsBuild ToolsCI/CDCode CoverageCode OrganizationConfigurationConfiguration ManagementCryptographyDatabase Management
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