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Jakub Sztandera

PROFILE

Jakub Sztandera

Kubuxu contributed to Filecoin-related projects by enhancing backend reliability and security across several repositories, including filecoin-project/curio and FilOzone/filecoin-services. He stabilized the F3 participation workflow by upgrading dependencies and improving error handling in Go, reducing downtime and operational risk. In FilOzone/filecoin-services and synapse-sdk, he implemented v2 CID migration and introduced EIP-712 signing for dataset metadata using TypeScript and Solidity, strengthening data integrity and verifiability. Kubuxu also extended the ABI export workflow to include the Errors contract, refining build system automation. His work demonstrated depth in dependency management, cryptography, and smart contract integration, resulting in robust, maintainable systems.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

5Total
Bugs
2
Commits
5
Features
3
Lines of code
344
Activity Months3

Work History

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for FilOzone/filecoin-services: Focused on extending the ABI export workflow to include the Errors contract and tightening build-system support to ensure ABI generation and availability. This reduces integration friction for downstream tooling and improves contract visibility across services. Major bugs fixed: none reported.

August 2025

3 Commits • 2 Features

Aug 1, 2025

August 2025: Delivered significant enhancements to Filecoin integration and dataset security across FilOzone/filecoin-services and FilOzone/synapse-sdk, focusing on feature deliveries, major bug fixes, and measurable business impact. Key improvements include a v2 CID migration for the Filecoin Warm Storage Service and the introduction of EIP-712 signing for dataset metadata, paired with bug fixes that restore and stabilize critical EIP-712 type signatures and hash ordering. The work reduces integration risk with Filecoin protocols, strengthens data integrity and verifiability for dataset operations, and enhances test traceability and security posture. Technologies demonstrated include advanced CID handling, EIP-712 signing, type definitions updates, and secure server-side metadata propagation.

November 2024

1 Commits

Nov 1, 2024

Month: 2024-11 — Repository: filecoin-project/curio Key achievements delivered: - Fixed F3 participation errors by upgrading go-f3 and Lotus to RC3; corrected sentinel error handling that prevented outages. Commit 34abdc986e9e2f6f3d79f57127ec93e5302fbd43. - Validated Lotus RC3 integration within the F3 workflow to improve resilience and reduce downtime during participation. - Maintained release discipline with a focused patch, enabling safe rollout and straightforward rollback if needed. - Improved traceability by linking changes to incident #313 and the exact commits used. Major bugs fixed: - F3 participation errors caused by sentinel errors; resolved via RC3 error handling improvements. Overall impact and accomplishments: - Stabilized the F3 participation workflow, reducing error rates and downtime, which directly improves reliability for users and partners. - Demonstrated strong engineering discipline in dependency upgrades, testing, and release management. Technologies/skills demonstrated: - Go, Go modules, dependency management, and integration with Lotus RC3 - Error handling improvements, sentinel error management - Release engineering, traceability, and commit hygiene Business value: - Lower operational risk in participation processes, higher platform uptime, and faster incident resolution for core Filecoin participation features.

Activity

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Quality Metrics

Correctness94.0%
Maintainability92.0%
Architecture90.0%
Performance88.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

GoJavaScriptMakefileSolidityTypeScript

Technical Skills

API DevelopmentBackend DevelopmentBlockchain DevelopmentBuild SystemCryptographyDependency ManagementEIP-712Ethers.jsFilecoinGo ModulesSmart Contract DevelopmentSmart ContractsSolidityTypeScript

Repositories Contributed To

3 repos

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

FilOzone/filecoin-services

Aug 2025 Oct 2025
2 Months active

Languages Used

SolidityMakefile

Technical Skills

Blockchain DevelopmentEIP-712FilecoinSmart Contract DevelopmentSmart ContractsSolidity

filecoin-project/curio

Nov 2024 Nov 2024
1 Month active

Languages Used

Go

Technical Skills

Dependency ManagementGo Modules

FilOzone/synapse-sdk

Aug 2025 Aug 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

API DevelopmentBackend DevelopmentCryptographyEthers.jsSmart ContractsTypeScript

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