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Marcelo Salloum dos Santos

PROFILE

Marcelo Salloum Dos Santos

Marcelo Salloum engineered backend and protocol solutions across the Stellar ecosystem, focusing on the stellar-disbursement-platform-backend and coinbase/x402 repositories. He delivered features such as secure invite templates, payment memo support, and protocol upgrades, using Go, SQL, and Docker to enhance reliability and deployment efficiency. Marcelo improved CI/CD pipelines with GitHub Actions, streamlined release governance, and optimized containerization with Alpine-based images. His work included designing the X402 protocol scheme and authoring contract invocation signing guides, addressing integration, security, and developer onboarding challenges. The depth of his contributions reflects strong backend architecture, robust automation, and thoughtful documentation practices for blockchain applications.

Overall Statistics

Feature vs Bugs

85%Features

Repository Contributions

44Total
Bugs
5
Commits
44
Features
29
Lines of code
20,039
Activity Months12

Work History

January 2026

2 Commits • 2 Features

Jan 1, 2026

January 2026 monthly summary focusing on feature delivery in the Stellar ecosystem. Two major deliverables: (1) X402 Protocol Scheme for Stellar Facilitator Transactions in coinbase/x402, and (2) Contract Invocation Signing Guide (G-accounts and C-accounts) in stellar/stellar-docs. The month emphasized protocol design, safety checks, and developer experience, with contributions spanning protocol specification, flow improvements, and comprehensive documentation. No explicit critical bug fixes were recorded; instead, design refinements and documentation enhancements expanded secure transaction flows and auth-entry signing guidance across multiple projects.

December 2025

1 Commits • 1 Features

Dec 1, 2025

December 2025: Backend SDP delivery focused on strengthening release governance by refreshing the automated reviewer roster to reflect current contributors and maintain proper approval routing. The change reduces bottlenecks and aligns production release controls with the team composition. Implemented in a chore PR that updated the reviewer list and validated through the automated release process.

November 2025

4 Commits • 2 Features

Nov 1, 2025

November 2025 monthly summary focused on delivering developer-facing improvements and stabilizing CI across two repositories (stellar-cli and quickstart), with emphasis on business value, faster feedback, and long-term compatibility. Key features and improvements were delivered for easier provider integration and more reliable builds, while fixes reduced CI flakiness and improved onboarding for contributors. Key features delivered: - RPC Header Usage Documentation and Examples in stellar-cli (commit b05bc126db212851f2ba9ca839a57bcc8f5183a4). Provides guidance and examples for passing the --rpc-header option to support multiple headers and better integration with RPC providers. - MacOS build and CI stability improvements in quickstart (commit db4d19900024e1b7e91f1666f3fb19ce31c05105). Major bugs fixed: - CI runner upgrade to macOS 15 for stellar-cli to replace deprecated macOS-13, addressing stability and future deprecation (commit 1e12cb8a664453e5f63b9afe25b8b13f97b26a6d). - MacOS runs stabilization across quickstart workflows by adopting mount-type=9p, installing Colima via Homebrew, and reducing timeouts to speed up builds (commit ca1d9050c920e646d78d29232141a21dcdaf7f07). Notes include better runner compatibility and a temporarily disabled ledger-emulator workflow pending resolution. Overall impact and accomplishments: - Improved developer experience and onboarding with clear RPC guidance and more reliable macOS CI builds, enabling faster feedback cycles and smoother contributor integration. - Cross-repo stability enhancements reduce flaky builds and deprecation risk, supporting long-term maintainability and faster release cycles. Technologies/skills demonstrated: - CI/CD best practices, macOS runner management, and GitHub Actions workflow tuning. - System stabilization using 9p mount type, Colima (via Homebrew), and build timeout optimizations. - Technical writing and documentation quality, aligning user guidance with hackathon feedback (Meridian).

September 2025

2 Commits • 1 Features

Sep 1, 2025

September 2025: Backend-focused improvements centered on code quality, CI reliability, and email rendering consistency for the Stellar Disbursement Platform backend. Re-enabled golangci-lint in CI, updated the workflow to golangci-lint v2.1.2 with adjusted configurations, and performed minor code and dependency updates to align with linter requirements. Fixed email template CSS to enforce white button text across clients, addressing rendering inconsistencies in Gmail. These changes reduced lint-related build issues and improved the consistency and reliability of communications.

August 2025

1 Commits • 1 Features

Aug 1, 2025

August 2025 monthly summary for the stellar-disbursement-platform-backend focused on delivering a critical dependency upgrade to enable protocol-23 readiness for mainnet. The backend maintained alignment with Stellar protocol changes while keeping release risk low through dependency pinning and checksum updates.

June 2025

1 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary for stellar/stellar-disbursement-platform-backend. Key accomplishment: deploy optimization via Alpine-based Docker images and multi-stage builds, reducing image size and accelerating deployment builds. No major bugs fixed this month; focus was on performance, reliability, and readiness for scale. Business value: faster deployments, lower resource usage, and easier maintenance; technologies demonstrated include Docker, Alpine Linux, and multi-stage builds.

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for the stellar/stellar-disbursement-platform-backend: What was delivered: - Documentation Badges and Changelog Update: Enhanced the README with status, documentation, and dependency badges; updated the CHANGELOG to reflect these additions. - Commit reference: 2777e71ee04de45ad2a9743283faaac57ce25c6f ("Add badges to the README.md file (#691)") to ensure traceability and governance. Key features delivered: - Clear visibility into project health and documentation status via badges (build, docs, dependencies) directly in the repository homepage. - Improved changelog traceability showing recent documentation-related enhancements. Major bugs fixed: - No major bugs reported or resolved this month; effort focused on documentation quality and repo hygiene. Overall impact and accomplishments: - Enhanced onboarding for new contributors and faster stakeholder assessment through visible health indicators. - Reduced ambiguity around dependencies and documentation status, contributing to smoother maintenance and release readiness. - Strengthened governance and traceability with a documented change entry and linked commit. Technologies/skills demonstrated: - Git and commit hygiene, Markdown README and CHANGELOG maintenance, use of repository badges to communicate health signals. - Documentation governance and change traceability practices.

March 2025

9 Commits • 4 Features

Mar 1, 2025

March 2025 monthly summary for stellar/stellar-disbursement-platform-backend focusing on delivery of user-centric improvements, reliability fixes, and modernization of CI/CD. Highlights include streamlined PR reviews, enhanced CSV ingestion with Stellar memos, modernized CI/CD tooling and dependencies, reliability improvements for health checks, and strengthened test coverage with retry logic and expanded end-to-end tests for payout APIs. All efforts contributed to faster, safer deployments, higher data fidelity in disbursement processing, and improved developer productivity.

February 2025

5 Commits • 4 Features

Feb 1, 2025

February 2025 (stellar/stellar-disbursement-platform-backend) – Delivered four core backend enhancements focused on search usability, payment traceability, UX improvements for account recovery, and deployment reliability. The work strengthens business value by improving discovery, enabling end-to-end memo tracing across Stellar and Circle payments, simplifying user password resets, and accelerating safe releases with centralized query configuration.

January 2025

6 Commits • 4 Features

Jan 1, 2025

January 2025 – Delivered security, reliability, and API-flexibility enhancements for the Stellar Disbursement Platform Backend. Key features delivered include: Secure Invite Templates hardened against XSS via robust HTML parsing; Ingress Configuration Cleanup to simplify deployments; Modularized ReCAPTCHA and MFA Validation for API-ready usage; Circle API: Transfers API Support with dynamic endpoint selection. Major bugs fixed include: Circle Payout Retry Robustness with missing trustlines and improved error handling; Receiver Verification Patchability and Auditing to enable safe updates of confirmed fields and enhance auditing. Overall impact: strengthened security, reduced operational risk, and greater integration flexibility with Circle, enabling more robust payouts and smoother deployments. Technologies demonstrated: HTML parsing for security, Kubernetes ingress simplification, modular validation refactors for API-only usage, and API-driven endpoint configuration.

December 2024

4 Commits • 3 Features

Dec 1, 2024

December 2024: Delivered across backend and docs with a focus on test coverage, API reliability, and developer experience for the Stellar Disbursement Platform. Key items include Futurenet network support with end-to-end tests, Circle payouts API migration with updated DB schema and robust error handling and retries, and SDP v3.0.0 documentation updates. These workstreams improved risk reduction, operational stability, and onboarding efficiency.

November 2024

8 Commits • 5 Features

Nov 1, 2024

November 2024: Delivered security validation for invite templates to prevent JavaScript/HTML/CSS in invites, upgraded dependencies to ensure Protocol 22 readiness, expanded end-to-end test coverage for registration and XLM disbursement flows, and improved CI/CD workflows for faster, more reliable deployments. Renamed messaging timestamp to last_message_sent_at and updated Helm docs to reflect additional communication channels. These changes strengthened security, reliability, and deployment velocity while aligning with strategic protocol and testing goals.

Activity

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Quality Metrics

Correctness92.8%
Maintainability88.6%
Architecture87.0%
Performance84.4%
AI Usage23.2%

Skills & Technologies

Programming Languages

BashDockerfileGoHTMLJavaScriptMakefileMarkdownRustSQLShell

Technical Skills

API DevelopmentAPI DocumentationAPI IntegrationAPI integrationAWS SDKAuthenticationAutomationBackend DevelopmentCI/CDCI/CD ConfigurationCLI DevelopmentCSSCSV ParsingCode MaintainabilityCode Review Process

Repositories Contributed To

5 repos

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

stellar/stellar-disbursement-platform-backend

Nov 2024 Dec 2025
10 Months active

Languages Used

BashDockerfileGoJavaScriptShellYAMLSQLMarkdown

Technical Skills

Backend DevelopmentCI/CDDependency ManagementDevOpsDockerDocker Compose

stellar/stellar-docs

Dec 2024 Jan 2026
2 Months active

Languages Used

MarkdownTypeScriptYAML

Technical Skills

API DocumentationDocumentationOpenAPI SpecificationTechnical WritingStellar SDKdocumentation

stellar/stellar-cli

Nov 2025 Nov 2025
1 Month active

Languages Used

RustYAML

Technical Skills

API integrationCI/CDDevOpsGitHub ActionsRustdocumentation

stellar/quickstart

Nov 2025 Nov 2025
1 Month active

Languages Used

ShellYAML

Technical Skills

CI/CDContinuous IntegrationDevOpsGitHub ActionsmacOS Development

coinbase/x402

Jan 2026 Jan 2026
1 Month active

Languages Used

Markdown

Technical Skills

Stellar network integrationblockchain developmentprotocol design