I handle complex backend engineering, custom API integrations, and data pipelines under your agency's brand so you can close high-value client deals without adding technical overhead.
Max Garceau
White-Label Developer for Agencies
Mailchimp & Ecommerce Integrations
Backend Systems & API Specialist
Integration Engineer
White-Label Integration Partner for Marketing Agencies
Core Integration Capabilities
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Marketing & E-commerce Hubs Native-level integrations and automated data syncs across Mailchimp, Shopify, Wix, and custom web platforms.
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Data & Lead Pipelines Custom Lead Ads API integrations (Meta, Google, LinkedIn, Snap, TikTok), CRM/ERP connectors, and automated booking and scheduling engines.
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Enterprise-Grade Reliability Event-driven architectures, fault-tolerant syncs, and large-scale data migrations engineered for high availability and zero data loss.
Key Services
1. White-Label Integration Engineering
Custom API connectors, webhooks, and backend pipelines built strictly behind the scenes. You maintain the client relationship, set the markup, and own the account. I engineer, test, and document the build under your brand.
2. Paid Integration Audit (1-Week Discovery)
A structured 1-week engagement to evaluate your client’s technical requirements, legacy databases, or custom API endpoints. I map data flows, identify sync gaps, and deliver an actionable execution blueprint your agency can present under its own logo.
How I Work With Agencies
- Audit & Scope: We review your client's API requirements and map out the data architecture without risking your team's reputation.
- Build Behind the Scenes: I develop, test, and handle the heavy backend engineering under a white-label setup.
- Deploy & Hand Off: Clean delivery with clear technical documentation so your agency delivers a seamless solution.
Case Studies
Works
New Jersey Policy Perspective
Website
Clare Matrix
Website
Rocky Mountain Communities
Website
CHIRLA
Website
Alabama Arise
Website
Greenlining
Website
About Me
White-Label Integration Partner for Marketing Agencies
Senior Integration Engineer specializing in Mailchimp, Shopify, and custom API pipelines.
I’m a senior fullstack engineer with 8 years of experience building scalable backend systems, microservices, and high-volume data pipelines.
Most recently, I built e-commerce and integration pipelines at Intuit | Mailchimp, where I engineered event-driven architectures, automated lead syncing systems, and cross-platform integrations with partners like Wix and Canva. Prior to that, I led backend engineering at Modern Tribe, architecting high-availability API infrastructure for high-scale enterprise clients.
Today, I offer white-label integration engineering and technical discovery audits to marketing agencies. When your clients need custom data flows, complex platform connections, or reliable webhook architectures, I handle the engineering behind the scenes so your team can deliver high-value technical solutions with confidence.
- Location US (Remote)
- Availability White-Label / Project-Based
- Specialization APIs, Webhooks, Data Pipelines
- Response Time < 24 Hours
Why Agencies Partner With Me
Enterprise Experience
Proven track record building high-availability, fault-tolerant infrastructure used by millions.
White-Label First
Strict behind-the-scenes execution. I respect your client relationship and work entirely under your agency's brand.
Direct Senior Engineering
You work directly with a senior fullstack lead from discovery to deployment. No account managers, middle-men, or unvetted code.
Fault-Tolerant Architecture
Engineered for high reliability, idempotent event processing, automated retry mechanisms, and robust error handling.
Resume
Senior fullstack engineer with 8 years of experience building integrations at scale. I spent nearly two years on Mailchimp’s ecommerce and integrations team, and now I offer that expertise white-label to marketing agencies.
Experience
2026 - Present
Founder & Integration Engineer
Garceau Integration Engineering
White-label integration engineering for small-to-mid-sized marketing agencies. I build custom integrations between Mailchimp, Shopify, Wix, and business tools (CRMs, ERPs, booking systems, lead APIs) under the agency's brand. Services include integration audits, custom connector builds, and white-label overflow.
2024 - 2026
Senior Fullstack Software Engineer
Intuit | Mailchimp
2021 - 2024
Lead Backend Developer
Modern Tribe
At Modern Tribe, I served as the lead engineer for Café Bon Appétit, a $1M annual account serving enterprise clients including Google, Uber, Oracle, SAP, and Adobe across 450+ active sites (250k+ daily visits). I directed the account's technical roadmap and led a 4–5 person engineering team.
10x Performance on a 12-Year-Old Platform: Retrofitted a Laravel API over the legacy database, coordinated across 3 engineering teams to standardize access protocols and OpenAPI specifications, achieving 10x+ performance gains.
Backend Architecture at Scale: Designed scalable microservices to support new functionality, guided downstream dev teams in implementation, and consulted directly with site owners to align the roadmap with client requirements.
Promo Publisher: Created an internal app that syncs marketing efforts across external services via API, reducing manual campaign setup time by hours per week and guaranteeing consistency.
Hardened the platform against production threats: Mitigated active DDoS attacks via Cloudflare WAF and IP whitelisting, and implemented database sharding to handle high-volume data growth.
2018 - 2021
Full Stack Web Developer
Red Earth Design
Joined an 8-person agency as a core developer and grew into full ownership of client projects—handling everything from initial concept through design, build, and launch across dozens of sites.
One Dashboard, Dozens of Sites: Architected a network with a global admin dashboard, enabling clients to manage branding and content across dozens of sites from a single interface.
Build Once, Ship Everywhere: Built theme and component libraries in collaboration with design partners, establishing technical standards that accelerated delivery and supported long-term partnerships.
Education
2010 - 2013
Berklee College of Music
Boston, MA
- Graduated Magna Cum Laude
Platforms & Integrations
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Mailchimp, Shopify, Wix, Canva, WordPress / WooCommerce
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Meta Ads, Google Ads, LinkedIn Ads, Snap Ads, TikTok Ads
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CRM and ERP integrations
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Ecommerce and booking systems
Tech Stack
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Kafka, Kotlin, Spring Boot
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TypeScript, Node.js, React
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Python, FastAPI
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Laravel, WordPress, PHP
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AWS, GCP, Docker, Kubernetes
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PostgreSQL, MySQL, MongoDB, BigQuery, OpenSearch
Core Capabilities
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Event-driven architecture
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API design and OpenAPI specifications
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Data migration pipelines
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Webhook and real-time sync systems
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Fault-tolerant and idempotent design
Observability & Reliability
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Splunk, Grafana, Datadog, Bugsnag
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CI/CD (GitHub Actions)
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Cloudflare
Testimonials
Beyond Max's technical excellence, his leadership as the project's lead engineer has been invaluable. He consistently provided insightful consultation to our clients regarding long-term planning and migration strategies, ensuring alignment with business goals and technological advancements. Max possesses a rare blend of technical expertise, strategic vision, and collaborative spirit, making them a tremendous asset at Modern Tribe.
Chris Kindred
Director of Engineering at Modern Tribe
Instead of saying that something isn’t possible and shutting things down, Max approaches things constructively. He brings a high level of quality to everything he does.
Emma Barker
Owner of Red Earth Design
Get in Touch
Have a client integration coming up or need a 1-week discovery audit? Send me an email or drop me a line on LinkedIn to discuss the project.
- Email: max@maxgarceau.com
- LinkedIn LinkedIn
- Availability Remote (US Timezones)
- Response Time Within 24 Hours