Resume

Senior/Staff Software Engineer

Senior/staff-level software engineer with 20 years across healthcare, payments, and e-commerce. I design the data models, event contracts, and service boundaries that let multiple teams build on the same systems safely. Decision-level case studies at evansagge.com/work.

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Selected impact

Modeled multi-state clinical licensure so it raised available provider supply ~25%
Drove a 17.5% YoY conversion lift on a consumer gifting platform, plus 8% attributable to A/B experiments
Cut new-service-line launch time from 3–4 months to under one — four telehealth lines shipped in the following year
Rebuilt ACH processing around an explicit failure lifecycle, halving on-call load and closing a ~$300k annual leak

Skills

Technical Leadership: Architecture, System design, Roadmaps, OKRs, Domain modeling, Cross-team alignment, Mentorship & team scaling, RFCs & design docs
Payments & FinTech: ACH, RTP, Stripe, Payment reconciliation, Idempotent money movement
Backend Engineering: Distributed systems, Event-driven design, REST/GraphQL APIs, Domain-driven development, NestJS, Rails, Django
Languages & Frontend: TypeScript, JavaScript, Ruby, Python, React, Vue, Node.js
AI-Assisted Engineering: Claude Code, OpenAI Codex, GitHub Copilot, Agentic coding workflows
Infra & Data: PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch, Kafka, SQS
Cloud & Tools: AWS, Heroku, Docker, Workato, Stripe API, Twilio API, TailwindCSS, Figma

Experience

GoodLeap

Apr 2026 - present

Senior Software Engineer

Co-owned the Payments-side rollout of an org-wide migration to scoped permissions — consolidating five services' auth code into one shared library — and escalated a least-privilege flaw in the proposed scope design, winning revised org-wide guidance.
Authored the solution intent and design for faster financing payouts — per-loan contractor payouts over the Real-Time Payments (RTP) network — carrying the Funding/Payments ownership split to a decision, with the build handed off to other teams.
Took an invoice short-link service from design to production in two weeks, owning the security analysis for a public, non-revocable surface.
Built Dual Pricing's pricing calculation, charge-webhook reconciliation, partial-failure retry flows, and its downstream Kafka events.
Shipped compliance-critical ACH mandate changes within two weeks of starting, and drove the production cutover — verifying the Stripe-side mandate switch-off against live payments.

TypeScript · NestJS · Kafka · Stripe API · AWS · Claude Code · Codex

Rula

Apr 2024 - Dec 2025

Staff Software Engineer

Set architecture and data models for Provider Access, replacing an Airtable source of truth with a service that unified three onboarding flows owned by different teams (therapy, prescriber, in-person).
Modeled multi-state licensure as a first-class relationship rather than per-state duplicate records — increasing available provider supply ~25% in supply-constrained states without recruiting a single clinician.
Built the sync pipelines and insurance-matching domain logic keeping internal services and business applications in step, reducing data drift and reconciliation load.
Authored a 12-month architecture roadmap covering event contracts, taxonomy evolution, and platform reliability, adopted as the domain's planning basis.

Python · TypeScript · Kafka · PostgreSQL · AWS · Claude Code · Codex

Cedar

Jan 2023 - Nov 2023

Staff Software Engineer

Led design and rollout of dispute handling, replacing a queue worked by individual judgment with an explicit pipeline with defined states and ownership — resolution time −40% with accuracy up, because consistency was the prerequisite for speed.
Migrated payment-by-phone to Twilio and turned per-client provisioning from engineering work into configuration — completions +25%, client onboarding −45%.
Worked both systems as the same problem — turning judgment calls into explicit configuration — which is what let a regulated workflow get faster without getting looser.

Django · PostgreSQL · AWS · Stripe API · Twilio API

Nurx

Aug 2020 - Jan 2023

Engineering Manager

Sep 2021 - Jan 2023

Grew the team from 3 to 11 engineers and made delivery more predictable as it scaled, by spending the structure on ownership boundaries rather than process.
Established OKRs so engineers could tell whether their work mattered, and coached senior engineers through the next level.

Staff Software Engineer

Aug 2020 - Sep 2021

Cut time to launch a new telehealth service line from 3–4 months to under one by making the shared workflow configurable while deliberately keeping clinical rules explicit per line — the one place a shared default is dangerous rather than convenient. Four lines shipped in the following year.

TypeScript · Node.js · Ember.js · PostgreSQL · AWS

Procore Technologies

Jun 2019 - Jun 2020

Staff Software Engineer

Defined the payments domain by what the business does — authorize, capture, refund, reconcile — with processors as adapters, rejecting an abstraction over two vendors' APIs that would have fit neither. The service-module patterns it introduced outlived the payments work and gave other teams real ownership boundaries inside the monolith without extraction.

Ruby on Rails · React · MySQL · AWS · Redis

Venmo

Sep 2016 - Apr 2019

Senior Software Engineer

Rebuilt ACH processing around an explicit lifecycle where returns and failures are expected states rather than exceptions — on-call load and downtime −50%, and ~$300k/yr of silent write-offs eliminated. Most of the reliability win came from that single reframing.
Made reprocessing safe by construction through idempotent distributed processing; separately, built the platform's regulated escheatment workflows.

Python · Django · Celery · RabbitMQ · MongoDB

Entelo

Mar 2015 - Sep 2016

Senior Software Engineer

Rebuilt candidate search on a new aggregation and indexing pipeline, and added the follow-up workflows that made sourcing a sequence rather than a single query.

Ruby on Rails · React · MySQL · Elasticsearch · Kubernetes

Quad Learning

Mar 2013 - Feb 2015

Software Engineer

Designed the American Honors platform and led its decomposition from a monolith into services as the product grew.

Ruby on Rails · React · MySQL · AWS · Redis

Exist Software Labs

May 2005 - Jan 2013

Software Engineer

Eight years building SaaS and mobile products for clients, including leading development of the Infinite.ly social media management platform.

Ruby on Rails · React · MySQL · Elasticsearch · MongoDB

Portfolio

TravelCanvas

Feb 2026 - present

Co-founder

Co-founded TravelCanvas, an itinerary-management platform for individual travelers and travel managers; designing and building the product end to end with a small founding team.

Nuxt · Vue.js · TypeScript · PostgreSQL · Redis

Giftly

Jun 2022 - present

Consulting Software Developer

Ongoing engagement since 2022.
Led the migration of checkout, redemption, and account management off ERB and AngularJS onto Vue 3 and Inertia, replacing each flow behind an experiment; 17.5% YoY conversion lift plus 8% from experiments.
Built the recipient side end to end — gift landing, four payout methods, thank-you notes — and the buyer's self-service tools for order status, resend, cancel, and buy-again.
Moved checkout state to the backend and shipped a multi-item cart on top of it, then removed the password from the buyer path in favor of magic-link and passwordless checkout.
Built the gifting calendar and contacts — recurring events, invitations, email and text reminders, gift preferences — and developed the gift recommendation engine behind them.
Built the internal fraud-review application as a decision surface rather than dashboards; investigation throughput +40%, review backlog −50%.

Ruby on Rails · Vue.js · Inertia · TypeScript · Stripe API · Claude Code

Education

B.S. Computer EngineeringAteneo de Manila University, Philippines · 2005

B.S. PhysicsAteneo de Manila University, Philippines · 2004