Sr. Full Stack Engineer
OP
full-remoteseniorpermanentfullstack United States 3 days ago via LinkedIn
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ReactNext.jsTypeScriptNode.jsTailwind CSSRESTGraphQLPostgreSQLAgile/ScrumFinTech Payments
About the role
Sr. Full Stack Engineer (Senior)
Own and deliver product features end-to-end across frontend experiences, backend services, and APIs.
What you’ll do
- Full-stack feature ownership: Drive features from design discussions through implementation, release, and ongoing production support.
- Frontend engineering:
- Build responsive, performant, and accessible consumer web experiences with React, Next.js, and Tailwind.
- Implement complex UI flows integrating real-time and transactional data.
- Translate UX flows into clean, maintainable UI.
- Backend engineering:
- Design and build TypeScript + Node.js backend services (preferably NestJS or Express).
- Develop API-first, microservice-oriented systems (modular, resilient, independently deployable).
- Build and maintain REST and/or GraphQL APIs for frontend and mobile clients.
- Implement transactional, audit-friendly workflows for gameplay, wallets, bonuses, and settlements.
- Integrate with third-party systems including payments, KYC/identity, fraud, and analytics.
- Quality, security, and operations:
- Partner with QA/SDET to ensure strong automated and manual test coverage.
- Collaborate with AppSec and compliance for PCI and security expectations.
- Design for traceability, data integrity, and operational observability.
- Support production systems and participate in debugging and incident resolution.
Requirements
- 5+ years of professional software engineering with significant frontend and backend ownership.
- Strong experience with React, Next.js, Tailwind, TypeScript, and Node.js.
- Experience building/integrating REST or GraphQL APIs.
- Strong database skills, especially PostgreSQL.
- Experience scaling consumer-facing production systems.
- Familiarity with Agile/Scrum.
Strongly valued
- Experience with transactional, audit-friendly systems.
- Payments/wallets/financial workflows; FinTech, gaming/casino, or other regulated-industry experience.
- Real-time systems (e.g., WebSockets) or mobile experience.
- Proven use of AI tooling to accelerate development and testing.
Benefits & work style
- Fully remote with a flexible work culture.
- Medical, dental & vision coverage (100%; dependents partial).
- 401(k) employer match.
About OP
OP is a technology company building consumer-facing products and services. The role focuses on end-to-end engineering across web and backend systems that support gameplay, player accounts, and financial workflows such as wallets, payments, and promotions.
Scraped 6/17/2026