Senior Fullstack Engineer
Ant-Tech
AWSCloudJavaScriptNode.jsPostgresReactTypeScript
Senior Full-Stack Developer – Founding Engineer
Sauce
full-time
Posted on:
Location Type: Remote
Location: Remote • 🇨🇴 Colombia
Visit company websiteJob Level
Senior
Tech Stack
AzureCloudGoogle Cloud PlatformJavaScriptMongoDB.NETNext.jsNode.jsReactReact NativeSQLTypeScript
About the role
- Partner 1:1 with the Growth PMs to turn hypotheses into shipped software: scope, design, build (frontend/backend/mobile), launch, measure.
- Own end-to-end delivery of micro-features, internal tools, and integrations across multiple Sauce products.
- Design pragmatic architectures in .NET + React/Next.js (and Node.js where useful); create clean APIs and resilient services.
- Set up analytics/telemetry for every experiment (events, dashboards, alerts) and run A/B tests to validate impact.
- Build and maintain 3P integrations (payments, couriers, ordering marketplaces), including webhooks, retries, idempotency, and monitoring.
- Ship fast with CI/CD and feature flags; own on-call for what you build and drive post-mortems and hardening.
- Collaborate with core R&D when scale-up is needed; document pathways from prototype → productized service.
- Stack you’ll touch: .NET 8/C#, React + Next.js + TypeScript, Node.js (select services), MongoDB/SQL, Azure/GCP, React Native/Adalo (nice-to-have), CI/CD (GitHub Actions), n8n/Make/Zappier/Retool for fast ops tooling.
Requirements
- 8+ years hands-on development in .NET/C# plus strong frontend experience (React, Next.js, TypeScript) and server-side Node.js.
- Proven B2C-at-scale experience (high traffic, consumer UX, performance SLAs).
- Demonstrated “one-man-show/MacGyver” delivery: own scoping, architecture, coding, testing, and release.
- Expert in API integrations (payments, logistics, third-party marketplaces) and building reliable integration layers.
- Solid with datastores (MongoDB and SQL), caching, and event-driven patterns
- Strong cloud experience (Azure + GCP), CI/CD, and production observability
- Data-driven mindset: instrument features, define success metrics, run A/B tests, and iterate quickly with Growth PM.
- Excellent communication: able to collaborate directly with business stakeholders and field teams, no proxy PM/BA needed.
- Proven business acumen: capable of understanding and leveraging business context in decision making
- Passion for code quality, usability, and performance under real-world constraints.
- Will be a plus:
- - Prior Growth engineering or marketplace experience at companies like Uber, DoorDash, Grubhub (or similar on-demand/B2C).
- - Mobile: React Native and/or Adalo for rapid experiments; ability to publish lightweight mobile experiences.
- - Experience as Tech Lead/Architect in a startup; comfort refactoring legacy systems while shipping new bets.
- - Familiarity with low/no-code to accelerate experiments (n8n/Make/Zapier) and wire them safely into core systems.
- - Security & privacy awareness for consumer data; knows what to log and what not to log in growth contexts.
Benefits
- Strong & Competitive Compensation Package
- Flexible Work Environment
- 10 Paid Personal/Vacation Days
- 5 Paid Sick Days
- Monthly Wellness Stipend
- High-leverage role as the founding engineer for Growth, with direct line to PM and execs.
- Real users, immediate feedback loops, and autonomy to choose the fastest path to impact.
- Modern stack (microservices/serverless where it helps) and supportive senior engineering culture.
- Remote-friendly, flexible schedule, and an environment optimized for rapid experimentation.
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard skills
.NETC#ReactNext.jsTypeScriptNode.jsAPI integrationsMongoDBSQLCI/CD
Soft skills
communicationbusiness acumendata-driven mindsetcollaborationproblem-solvingdelivery ownershipadaptabilityleadershipusability focusperformance awareness
