cowprotocol/services
Sep 2025 – Feb 2026
6 Months active
Languages Used
MarkdownRustSQLShellYAMLTOML
Technical Skills
API DevelopmentAutomationBackend DevelopmentCI/CDCode QualityCommand Runner
Marcin Szymczak
PROFILE
Marcin Szymczak
During two months on the cowprotocol/services repository, Marszy developed and optimized backend infrastructure with a focus on automation, scalability, and configurability. He centralized CI and developer workflows using a Justfile, streamlining formatting, linting, and testing tasks in Rust projects. Marszy introduced read replica support with read/write separation in PostgreSQL, improving system throughput and scalability for read-heavy endpoints. He also enhanced database connection pooling to reduce resource usage and implemented runtime gas limit configuration for blockchain drivers, supporting dynamic network conditions. His work demonstrated depth in Rust, SQL, and configuration management, delivering maintainable solutions that improved both developer experience and system resilience.
Overall Statistics
Feature vs Bugs
77%Features
Repository Contributions
19Total
Bugs
3
Commits
19
Features
10
Lines of code
2,758
Activity Months6
Your Network
25 peopleWork History
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for cowprotocol/services. Focused on improving data integrity for Ethflow orders and advancing maintainability through a large refactor to share utilities and serialization logic. Delivered a robust true_valid_to correctness fix for Ethflow orders and completed a codebase-wide refactor to extract utilities and serialization into shared crates (serde-ext), enabling cross-service reuse and faster feature delivery. Validated with E2E tests (local_node_eth_flow_tx) and prepared for smoother staging deployments, reducing risk of data inconsistencies in production.
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for cowprotocol/services. Focused on improving data integrity for Ethflow orders and advancing maintainability through a large refactor to share utilities and serialization logic. Delivered a robust true_valid_to correctness fix for Ethflow orders and completed a codebase-wide refactor to extract utilities and serialization into shared crates (serde-ext), enabling cross-service reuse and faster feature delivery. Validated with E2E tests (local_node_eth_flow_tx) and prepared for smoother staging deployments, reducing risk of data inconsistencies in production.
February 2026
January 2026
7 Commits • 2 Features
Jan 1, 2026January 2026 (Month: 2026-01) focused on performance hardening of live orders and enabling scalable migrations for validity window features in cowprotocol/services. Delivered structural data model changes and query optimizations, implemented robust migration sequencing, and managed deployment risk with no-op migrations and optional indexing. Rolled back a problematic optimization to preserve production stability while re-planning the rollout.
January 2026
7 Commits • 2 Features
Jan 1, 2026January 2026 (Month: 2026-01) focused on performance hardening of live orders and enabling scalable migrations for validity window features in cowprotocol/services. Delivered structural data model changes and query optimizations, implemented robust migration sequencing, and managed deployment risk with no-op migrations and optional indexing. Rolled back a problematic optimization to preserve production stability while re-planning the rollout.
December 2025
2 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for cowprotocol/services focusing on delivering high-impact features, improving interoperability, and enabling gasless transaction patterns that strengthen the protocol’s liquidity and user experience.
2 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for cowprotocol/services focusing on delivering high-impact features, improving interoperability, and enabling gasless transaction patterns that strengthen the protocol’s liquidity and user experience.
December 2025
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025: Delivered Autopilot Zero-Downtime Deployments for cowprotocol/services by replacing the readiness probe with a startup probe that warms caches before the previous instance shuts down. This enables seamless handovers and near-zero downtime during autopilot transitions. No major bugs fixed this period; primary focus on reliability improvements and deployment readiness validation with infra.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025: Delivered Autopilot Zero-Downtime Deployments for cowprotocol/services by replacing the readiness probe with a startup probe that warms caches before the previous instance shuts down. This enables seamless handovers and near-zero downtime during autopilot transitions. No major bugs fixed this period; primary focus on reliability improvements and deployment readiness validation with infra.
October 2025
3 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for cowprotocol/services highlighting key feature deliveries and stability improvements that drive efficiency, configurability, and system resilience.
3 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for cowprotocol/services highlighting key feature deliveries and stability improvements that drive efficiency, configurability, and system resilience.
October 2025
September 2025
4 Commits • 2 Features
Sep 1, 2025September 2025 - cowprotocol/services: Implemented developer-focused CI/workflow automation via a Justfile to centralize formatting, linting, and test tasks, replacing ad-hoc cargo/nextest calls in CI; introduced read replica support with read/write separation to boost read throughput and scalability; fixed a critical fee ratio validation bug by switching to is_multiple_of for readability and CI reliability. Deliverables improve build consistency, accelerate onboarding and feedback cycles, and scale read-heavy endpoints while maintaining functionality. Technologies demonstrated include Justfile-driven automation, Rust tooling best practices (clippy-oriented fixes), and architecture-level read replica patterns.
September 2025
4 Commits • 2 Features
Sep 1, 2025September 2025 - cowprotocol/services: Implemented developer-focused CI/workflow automation via a Justfile to centralize formatting, linting, and test tasks, replacing ad-hoc cargo/nextest calls in CI; introduced read replica support with read/write separation to boost read throughput and scalability; fixed a critical fee ratio validation bug by switching to is_multiple_of for readability and CI reliability. Deliverables improve build consistency, accelerate onboarding and feedback cycles, and scale read-heavy endpoints while maintaining functionality. Technologies demonstrated include Justfile-driven automation, Rust tooling best practices (clippy-oriented fixes), and architecture-level read replica patterns.
Activity
Loading activity data...
Quality Metrics
Correctness91.0%
Maintainability84.2%
Architecture86.8%
Performance85.8%
AI Usage27.4%
Skills & Technologies
Programming Languages
MarkdownRustSQLShellTOMLYAML
Technical Skills
API DevelopmentAPI developmentAutomationBackend DevelopmentBlockchainCI/CDCode QualityCommand RunnerConfiguration ManagementConnection PoolingDatabase ManagementDistributed SystemsDocumentationPostgreSQLRefactoring
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline