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Vjeran Grozdanić

PROFILE

Vjeran Grozdanić

Vjeran Grozdanic developed AI observability and cost attribution features across Sentry’s relay, sentry-cli, and sentry-python repositories, focusing on granular telemetry for generative AI workloads. He implemented token-level cost estimation, live log streaming, and detailed data modeling using Rust, Python, and TypeScript. His work included schema design for accurate AI cost tracking, integration of throughput metrics, and privacy-conscious tagging of sensitive fields. By enhancing backend data structures and CLI tooling, Vjeran enabled more reliable cost reporting, improved developer onboarding, and better governance of AI operations. The solutions addressed both technical depth and maintainability, supporting robust monitoring and business decision-making.

Overall Statistics

Feature vs Bugs

93%Features

Repository Contributions

26Total
Bugs
1
Commits
26
Features
13
Lines of code
5,432
Activity Months5

Work History

October 2025

2 Commits • 2 Features

Oct 1, 2025

October 2025 (2025-10) monthly summary: Focused on delivering AI observability and data instrumentation to improve visibility, governance, and business value of GenAI workflows across two core repositories: getsentry/sentry-python and getsentry/relay. Primary activity consisted of feature delivery and instrumentation enhancements, enabling end-to-end tracing of AI interactions and more granular AI telemetry. No major bug fixes were recorded this month; the emphasis was on robust instrumentation and cross-repo collaboration rather than remediation. Impact and business value: - Accelerated issue diagnosis and performance optimization for AI-enabled Python applications through comprehensive tracing (sync/async, streaming, agent invocations, chats, and tool executions). - Improved data quality, visibility, and governance for AI usage with token usage and cost telemetry, plus privacy-conscious tagging of PII-related fields. - Strengthened foundation for cost visibility and privacy compliance in GenAI workflows, enabling better budgeting and risk management. Technologies and skills demonstrated: - Python-genai integration and observability instrumentation. - SpanData augmentation and pii tagging strategies for AI telemetry. - Cross-repo collaboration and focused delivery of AI-focused instrumentation.

September 2025

11 Commits • 4 Features

Sep 1, 2025

September 2025 performance snapshot: Enhanced AI cost visibility and data modeling across three repos, introduced reliable live log streaming for the CLI, and refreshed AI cost conventions and observability attributes. These changes deliver clearer cost metrics, improved pricing accuracy, stronger observability, and better developer productivity through migration-friendly schemas and cleaner data structures.

August 2025

1 Commits • 1 Features

Aug 1, 2025

August 2025 monthly summary for getsentry/sentry-cli: Delivered the new logs command to list and query log entries with filtering and pagination, backed by comprehensive integration tests. The work provides immediate value for users by improving log visibility in the CLI and lays a solid foundation for future log-management features, while preserving backward compatibility and aligning with the project’s quality standards.

July 2025

7 Commits • 4 Features

Jul 1, 2025

July 2025 performance recap for getsentry/relay and getsentry/sentry-conventions. Focused on AI observability, data normalization, and developer onboarding to drive reliability, cost accuracy, and measurable business value. Key initiatives include new AI throughput metrics, cost attribution fixes, and standardized AI data attributes, complemented by documentation updates to streamline dev workflows and testing.

June 2025

5 Commits • 2 Features

Jun 1, 2025

June 2025 performance summary for getsentry/relay: Implemented AI-focused cost visibility and data correctness improvements, delivering granular LLM cost estimation, enhanced span data, and more accurate UI token/cost representation. These changes improve cost attribution, budgeting, and decision-making for AI workloads.

Activity

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Quality Metrics

Correctness95.8%
Maintainability94.2%
Architecture93.4%
Performance89.2%
AI Usage29.4%

Skills & Technologies

Programming Languages

JSONMarkdownPythonRustShellTypeScript

Technical Skills

AI IntegrationAI/ML IntegrationAPI DesignAPI DevelopmentAPI IntegrationAttribute DefinitionAttribute ManagementBackend DevelopmentCLI DevelopmentCode CleanupConcurrencyConfiguration ManagementCost AnalysisCost ManagementCost Optimization

Repositories Contributed To

4 repos

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

getsentry/relay

Jun 2025 Oct 2025
4 Months active

Languages Used

JSONMarkdownRustTypeScript

Technical Skills

API DesignAPI IntegrationBackend DevelopmentCost ManagementData ModelingData Processing

getsentry/sentry-conventions

Jul 2025 Sep 2025
2 Months active

Languages Used

MarkdownTypeScriptPython

Technical Skills

API DesignAttribute DefinitionDocumentationAPI DevelopmentAttribute ManagementCode Cleanup

getsentry/sentry-cli

Aug 2025 Sep 2025
2 Months active

Languages Used

RustShell

Technical Skills

API IntegrationCLI DevelopmentRust ProgrammingTestingConcurrencyError Handling

getsentry/sentry-python

Oct 2025 Oct 2025
1 Month active

Languages Used

Python

Technical Skills

AI IntegrationGenerative AIObservabilityPythonTesting

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