Senior Full-Stack & Platform Engineer (Remote)

About Gumball Digital Gumball Digital is a performance marketing company that builds and operates consumer-focused digital brands connecting millions of people each year with products, services, and offers that matter to them. Through brands like Benefinds, ActiveTrials, and Homebase, we combine proprietary technology, data, and marketing expertise to create high-performing customer acquisition platforms. We’re intentionally small, profitable, and highly technical. We don’t have layers of management or long approval chains. We move quickly, solve real problems, and give talented people the autonomy to make meaningful decisions that directly impact the business. Our team values ownership, curiosity, and continuous improvement. We care about building systems that are fast, reliable, and scalable, while creating an environment where great ideas can come from anyone. If you enjoy wearing multiple hats, taking responsibility for important systems, and seeing your work make an immediate difference, you’ll fit right in. The Role Own the entire technology platform of a lean, profitable, high-traffic performance marketing business. You’ll be responsible for the applications, data platform, and infrastructure that generate revenue every day, with the autonomy to make it faster, more reliable, and easier to scale What You’ll Own You’ll be the technical owner of our production platform from end to end. Applications Our consumer survey and offer web applications running on AWS EC2. You’ll build new features while keeping the platform fast under real production traffic, including: Real-time offer serving Lead capture Event tracking Customer-facing web experiences Data Platform Own our high-traffic PostgreSQL database (Supabase, currently ~50GB and growing). Responsibilities include: Schema design Query optimization Index strategy Performance tuning Database reliability Performance matters. A single missing database index recently cost us thousands of dollars per day. We want someone who proactively owns performance before it becomes a business problem. Infrastructure Own the production environment. This includes: AWS EC2 Linux servers Deployments Monitoring Logging Observability Performance Uptime Your mindset should be: Is it up? Is it fast? Will we know about problems before our customers do? Integrations Maintain and improve integrations with systems including: Everflow TrustedForm IPQS Google APIs Tracking pixels and postbacks Internal AI tooling (our OpenClaw-based AI agent, Zelda Your First 90 Days You’ll be expected to quickly become the technical owner of the platform. Success looks like: Learning the complete survey → offer → revenue pipeline Becoming the go-to technical owner of the production platform Implementing meaningful monitoring and alerting for database and application health Shipping at least one customer-facing feature Delivering measurable improvements in reliability or performance What We’re Looking For... Required 7+ years building and owning production web applications Extensive PostgreSQL experience including indexing, query optimization, schema design, and troubleshooting under load ( required ) Strong AWS, EC2, Linux, and production operations experience Experience with Node.js, TypeScript, Python, and modern JavaScript front-end frameworks Strong API and systems integration experience Experience building observable, reliable production systems Comfortable owning systems independently in a small remote company Excellent communication skills and a high level of accountability Bonus Points Experience with any of the following is a plus: Performance marketing Affiliate marketing AdTech Lead generation Offer serving Attribution systems TrustedForm or consent platforms High-volume web applications AI-assisted software development Modern CI/CD Observability and production monitoring Taking legacy codebases from “working” to “well engineered” Why This Role Is Different This isn’t a ticket-taking engineering job. You’ll own a real production platform that generates revenue every day. You’ll have the freedom to make architectural decisions, improve reliability, and build new capabilities without navigating layers of management. The scope is similar to what many engineers only experience as a technical founder, but with the stability of an established, profitable business. If you’re looking for ownership, autonomy, and the opportunity to build systems that have an immediate business impact, we’d love to talk.