Senior Software Engineer
Building AI-powered solutions for healthcare & SaaS
15+ years architecting scalable backend systems, conversational AI platforms, and data-driven products.
Companies I've worked with
Recommendations
"Newton and I worked together during the last 4 years on multiple projects. He is eager to learn new things, easygoing, and works hard to deliver good code and suggestions."
What I Do
Services
Backend Engineering
Scalable API design, microservices architecture, and robust backend systems built with Ruby on Rails, GraphQL, and modern tooling.
AI & Voice Systems
Conversational AI pipelines, LLM integrations, speech-to-text and text-to-speech systems for healthcare and enterprise applications.
SaaS Development
End-to-end SaaS product development — from database design and billing to real-time features and production reliability.
Pricing
Membership Plans
Subscribe to get dedicated senior engineering — no hiring overhead, no contracts. Pause or cancel anytime.
Standard
One request at a time. Perfect for ongoing development needs.
- One request at a time
- Average 48-hour delivery
- Unlimited revisions
- Ruby on Rails & backend
- Frontend & API development
- Async communication
- Pause or cancel anytime
Pro
Double the throughput. Ideal for fast-moving teams.
- Two requests at a time
- Average 48-hour delivery
- Unlimited revisions
- Full-stack development
- AI & voice integrations
- Architecture & code reviews
- Direct Slack/video access
- Pause or cancel anytime
Custom
For larger teams or specialized projects that need a tailored approach.
- Custom request volume
- Priority delivery
- Unlimited revisions
- Full-stack + AI/ML scope
- Team embedding option
- Dedicated Slack channel
- Weekly strategy calls
- Custom contract terms
Not sure which plan fits? Book a free intro call to discuss your needs.
Career
Work
Action Network
CurrentCore backend engineer on Action Builder, a new organizing CRM product. Designed and implemented GraphQL schema powering relationship mapping, network visualization, and organizer workflows.
Wendi
Led development of an AI voice assistant platform for automated patient intake, insurance verification, and multichannel conversations in healthcare. Architected end-to-end patient workflow engine and real-time conversational AI pipelines.
HuntClub
Developed and shipped features for a talent-matching platform used by thousands of recruiters and hiring managers. Built full-stack features improving recruiter workflows and candidate pipeline management.
The Neat Company
Built and maintained backend microservices for Neat's core platform, led a 3-month Rails upgrade across multiple major versions on a legacy application, and coordinated development with other engineers to modernize and support the company's backend services.
CrazyEgg
Re-architected signup flow and ran 12 A/B tests, lifting conversion by +18%. Integrated Elasticsearch into analytics dashboard, cutting load time from 4s to 800ms. Built Shopify integration driving 5% retention increase.
Envato
Built and improved a managed WordPress hosting platform with multi-service architecture. Designed and implemented automated WordPress backup system for thousands of hosted sites.
Pressed
Founding engineer on a greenfield WordPress hosting platform. Built the entire stack from scratch using Ruby on Rails on AWS, including site provisioning, DNS configuration, and SSL management.
ReferralCandy
Shipped product features and streamlined e-commerce platform integrations for a referral marketing SaaS serving thousands of merchants.
Site5
Built internal CRM and client-facing management tools, a white-label managed WordPress product, and custom automation tooling for staff operations.
WWWH
Built internal CRM and client-facing management tools, a white-label managed WordPress product, and custom automation tooling for staff operations.
Critsend
Built a next-generation email deliverability platform in Python and maintained a distributed transactional email service handling high-volume sends. Developed a server reputation monitoring module (blacklist tracker) and a billing application for the new product line.
Side Projects
Projects
Chatified
personal ActiveAI-powered chat platform for businesses. Conversational AI assistant builder with multi-channel support.
MailMachine
personal ActiveModern email marketing platform with automation workflows, analytics, and deliverability tools.
Maior Desconto
personal ClosedBootstrapped marketplace that reached $700K+ in sales, 41,000+ registered users, and 17,000 paying customers.
Mailtrack
personal ClosedFull-featured email marketing platform with campaign automation and analytics.
Impact
Results That Matter
+18%
Conversion lift via A/B testing
CrazyEgg
5x
Performance improvement on analytics
CrazyEgg
100K+
Students monitored in engagement system
State Gov
$700K+
Revenue from bootstrapped marketplace
Maior Desconto
41K+
Registered users on marketplace
Maior Desconto
30K
Monthly payouts processed
State Gov
15+
Years of Experience
Building production systems
10+
Companies
From startups to enterprises
100K+
Users Served
Across platforms built
45
Countries Visited
Global perspective
About
Newton Garcia
Senior Software Engineer with 15+ years of experience, most recently leading the development of an AI voice assistant SaaS for healthcare providers. Built the platform from scratch, including core workflows, backend systems, and integrations with healthcare tools and EHR-related systems.
Background across SaaS, e-commerce, and cloud platforms, with a strong focus on backend-heavy systems, data-driven product work, and production reliability.
Founded two companies — including a group-buying marketplace that generated over $700K in sales — and contributed to open-source projects like graphql-ruby.
Location
Goiania, Brazil
Languages
Portuguese, English, Spanish
Traveled
45 countries →Status
Available
Stack
Technical Skills
Languages
01Backend & APIs
02Frontend
03Data & Search
04Infrastructure
05Observability
06AI & Voice
07Contact
Let's build
something great.
Currently available for contract work and full-time opportunities. Let's discuss your project.