A5 Labs

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Senior/ Principal Full-Stack Engineer (B2C Anti-Cheat POC) Node.js / React Remote | Full-Time About the Role We are building a B2C Anti-Cheat product surface that exposes integrity signals, trust scores, and suspicious behavior indicators to end users. This role is focused on execution - building the first production-grade POC that turns anti-cheat outputs into real, user-facing product experiences. You will work closely with the Data / Anti-cheat team and integrate detection outputs into scalable backend services and intuitive frontend dashboards. This is a hands-on role with direct impact on product delivery. What You'll Do 1★ Build the Anti-Cheat Application Layer (POC First) • Develop backend services (Node.js) to consume integrity signals from data systems • Design APIs that serve trust score, risk indicators, and evaluation results • Build real-time and batch processing flows for B2C hand evaluation • Ensure reliability and clean data boundaries 2★ Deliver B2C Product Surfaces (React) • Player integrity dashboard • Trust score visualization • "Why this score?" explanation UI • Suspicious signal indicators • Evaluation result page Focus: clarity, transparency, and product usability. 3★ Integrate with Data / Anti-Cheat Systems • Work with data engineers & ML teams • Integrate model outputs into serving layer • Handle ingestion, validation, deduplication • Maintain version control and logging 4★ Prepare for Core Integration • Build architecture that can later integrate into QuintAce core • Ensure modular, scalable service boundaries • Support future multi-platform extension What We're Looking For Required • 5+ years full-stack engineering experience • Strong Node.js backend development • Strong React / frontend architecture • Experience working with data-heavy systems • Experience building APIs and dashboards • Comfortable working in ambiguous 0→1 environments • Strong ownership mindset Preferred • Trust & safety / fraud / risk product exposure experience • Gaming or fintech background • Experience working with ML-driven systems Why This Role Matters This is the first version of a product that makes anti-cheat transparent to players. You're not building detection models - you're building the product layer that makes integrity visible, understandable, and actionable. POC → Core Product → Platform Integration.