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Santiago Leon

@santiagoleon

Backend Software Engineer at Xinamon who modernizes Ruby on Rails platforms, including Cofense Triage v3.0.

At Cofense Triage v3.0, I modernized a Ruby on Rails security platform for phishing incident response and security operations. I migrated legacy interfaces to Phlex components and built reactive admin interfaces with Hotwire, Turbo Frames, Turbo Streams, and Stimulus.

I also maintained integrations with VirusTotal, Hatching/Cuckoo Sandbox, Cisco Umbrella, and Syslog systems. My work included improving configuration workflows, OAuth management, admin tooling, request specs, and maintainability.

At Salesforce Trailhead Platform, I supported the migration of approximately 20 internal Ruby on Rails applications to updated library and gem versions. I refactored legacy code, fixed platform issues, and expanded automated test coverage.

At Funding Circle (Altimetrik), I built backend API services for a UK fintech lending platform, including secure endpoints, service integrations, and reporting automation. I also contributed to a Ruby on Rails crowdfunding platform at Crowdfrica and built inventory, reporting, and HR administrative systems at liteCode.

Experience

Work history, roles, and key accomplishments

Current

Web Developer

Current

Xinamon

Jan 2021 - Present (5 years 8 months)

Developed Ruby on Rails applications and internal platforms across backend services, UI modernization, integrations, and maintenance. Contributed to architecture, feature delivery, refactoring, and agile collaboration.

Ruby on Rails Backend Development UI Modernization Integration Agile

Backend Developer

Salesforce Trailhead Platform

Oct 2023 - Feb 2024 (4 months)

Migrated approximately 20 internal Ruby on Rails applications to updated library and gem versions. Refactored legacy code, fixed platform issues, and expanded automated test coverage to support maintainability.

Ruby on Rails Refactoring Testing Automation RSpec

Backend Developer

Funding Circle (Altimetrik)

Jan 2021 - Dec 2023 (2 years 11 months)

Built backend API services for a UK fintech lending platform. Delivered secure endpoints, service integrations, reporting automation, and production fixes using Rails, PostgreSQL, RSpec, Git, and Jira.

Ruby on Rails PostgreSQL RSpec Git Jira REST APIs Third Party Integrations

Volunteer Developer

Crowdfrica

Jan 2021 - Dec 2022 (1 year 11 months)

Contributed to a Ruby on Rails crowdfunding platform for healthcare and education initiatives in Africa. Developed and maintained fundraising and donation workflows, including PayPal payment integration, within a platform supporting credit and debit cards, Mobile Money, and Cash App.

Ruby on Rails PayPal Integration Payment Processing Crowdfunding

Developer

liteCode

Jan 2020 - Dec 2021 (1 year 11 months)

Built administrative systems for inventory, reporting, and HR management using Ruby on Rails, Bootstrap, JavaScript, and responsive interfaces.

Ruby on Rails Bootstrap JavaScript Responsive Design Inventory Management HR Management

Software Engineer

Cofense Triage

Modernized a large Ruby on Rails security platform used for phishing incident response and security operations. Migrated legacy interfaces to a component-based architecture using Phlex and built reactive admin interfaces with Hotwire, Turbo Frames, Turbo Streams, and Stimulus.