Evan Sagge
Dallas, TX, USA | +1.813.505.7366 | evansagge@gmail.com | evansagge.com | github.com/evansagge

SUMMARY
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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.

Key Achievements
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

PROFESSIONAL EXPERIENCE
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GoodLeap
Senior Software Engineer, Apr 2026 - present
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.
Technologies: TypeScript, NestJS, Kafka, Stripe API, AWS, Claude Code, Codex

Rula
Staff Software Engineer, Apr 2024 - Dec 2025
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.
Technologies: Python, TypeScript, Kafka, PostgreSQL, AWS, Claude Code, Codex

Cedar
Staff Software Engineer, Jan 2023 - Nov 2023
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.
Technologies: Django, PostgreSQL, AWS, Stripe API, Twilio API

Nurx
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.
Technologies: TypeScript, Node.js, Ember.js, PostgreSQL, AWS

Procore Technologies
Staff Software Engineer, Jun 2019 - Jun 2020
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.
Technologies: Ruby on Rails, React, MySQL, AWS, Redis

Venmo
Senior Software Engineer, Sep 2016 - Apr 2019
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.
Technologies: Python, Django, Celery, RabbitMQ, MongoDB

Entelo
Senior Software Engineer, Mar 2015 - Sep 2016
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.
Technologies: Ruby on Rails, React, MySQL, Elasticsearch, Kubernetes

Quad Learning
Software Engineer, Mar 2013 - Feb 2015
Designed the American Honors platform and led its decomposition from a monolith into services as the product grew.
Technologies: Ruby on Rails, React, MySQL, AWS, Redis

Exist Software Labs
Software Engineer, May 2005 - Jan 2013
Eight years building SaaS and mobile products for clients, including leading development of the Infinite.ly social media management platform.
Technologies: Ruby on Rails, React, MySQL, Elasticsearch, MongoDB

ADDITIONAL EXPERIENCE
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TravelCanvas
Co-founder, Feb 2026 - present
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.
Technologies: Nuxt, Vue.js, TypeScript, PostgreSQL, Redis

Giftly
Consulting Software Developer, Jun 2022 - present
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%.
Technologies: Ruby on Rails, Vue.js, Inertia, TypeScript, Stripe API, Claude Code

CORE SKILLS
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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

EDUCATION
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B.S. Computer Engineering
Ateneo de Manila University, Philippines, 2005

B.S. Physics
Ateneo de Manila University, Philippines, 2004