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Jefferson Louise BasilioJB
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Jefferson Louise Basilio

@jeffersonlouisebasil

Senior Software Engineer at Apollo.io who migrated credits for ~37K paid teams and built revenue-impacting billing workflows.

Philippines
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At Apollo.io, I architected a phased rollout of the Unified Credits migration across customer-facing product surfaces and billing workflows. Using reusable React components and Sidekiq batch processing, I migrated ~37K paid teams and 99% of free teams across monetization surfaces tied to ~$150M ARR.

I owned customer-facing discounting workflows for eligible self-serve accounts, partnering with Billing and Support on rollout, edge cases, and customer-facing behavior. The initiative was tied to ~$1.4M ARR.

I also designed and introduced Playwright/VCR testing infrastructure for external service-dependent end-to-end tests, reducing runtimes by 20–50% and eliminating top flaky pricing failures. I integrated Stripe Tax ID collection into billing workflows, reducing tax-related support queries by ~100 queries/month.

Earlier at Apollo.io, I implemented sales tax collection and customer-facing promo and discount workflows across checkout, signup, and cancellation experiences. At Qwikwire Billing Systems, I built an internal form builder that reduced client onboarding implementation time by 50%, and integrated payment gateway APIs for local and international transactions.

Experience

Work history, roles, and key accomplishments

Apollo.io logoAP

Senior Software Engineer

Mar 2023 - May 2026 (3 years 2 months)

Architected phased rollout for Apollo's Unified Credits migration across customer-facing product surfaces and billing workflows, migrating ~37K paid teams and 99% of free teams. Owned customer-facing discounting workflows and introduced Playwright/VCR testing infrastructure, reducing E2E test runtimes by 20-50%.

Education

Degrees, certifications, and relevant coursework

University of the Philippines logoUP

University of the Philippines

Bachelor of Science, Computer Science

2015 - 2019

Bachelor of Science in Computer Science from the University of the Philippines, Los Baños, from 2015 to 2019.

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