Full Stack Engineer

About Dividandy

We're building a mobile trading tournament platform where users compete in real-time financial trading competitions. High-frequency gaming mechanics combined with real market data. We process thousands of concurrent transactions, manage complex tournament logic, and serve real-time leaderboards across iOS, Android, and web.

The Role

You'll be a backend-focused full-stack engineer. Primarily (75%) building and maintaining NestJS microservices-writing APIs, optimizing databases, handling real-time events. But you'll also (25%) work on React interfaces to ensure smooth integration between backend and frontend. You'll own the full lifecycle of features: API design, implementation, frontend integration, and deployment. Starting as one person, you'll be responsible for keeping multiple services healthy and delivering features end-to-end.

What You'll Do

Backend (75% - NestJS Primary):

• Build and maintain NestJS microservices (Storefront, Notification, Segmentation, Game Data)
• Design and implement REST APIs with proper error handling and validation
• Optimize PostgreSQL queries and implement Redis caching strategies
• Build event-driven systems with Kafka for real-time updates
• Write comprehensive tests for API services
• Debug production issues and improve system reliability
• Participate in on-call rotation to support production
• Own service architecture and performance optimization

Frontend (25% - React/Next.js Support):

• Build pages and components for the Next.js web storefront
• Create admin dashboards and internal tools with React
• Integrate APIs with frontend applications
• Support frontend team with backend-frontend integration
• Write frontend tests for API integration

AI-Assisted Development:

• Use AI coding assistants (Claude, GitHub Copilot) to accelerate NestJS backend development
• Generate boilerplate code, tests, and API scaffolding using AI tools
• Validate and improve AI-generated code
• Use AI for API contract generation and validation
• Leverage AI-powered debugging and troubleshooting
• Apply AI for backend performance optimization
• Use AI for code review and refactoring suggestions
• Generate documentation and comments using AI tools

What We Need

Required:

• 4-6 years building production Node.js/JavaScript systems (backend-focused)
• Strong NestJS or similar Node.js framework experience
• Strong PostgreSQL knowledge (query optimization, schema design)
• REST API design and implementation expertise
• Kafka or event-driven system experience
• TypeScript proficiency (backend primary, some frontend)
• React or Next.js basics (enough to integrate and support frontend)
• Ownership mentality - you care about reliability and code quality
• Proficiency with AI coding assistants (Claude, GitHub Copilot, or similar)
• Ability to critically evaluate AI-generated code and know when to accept, modify, or reject it
• Experience using AI for code generation, testing, and documentation
• Willingness to integrate AI into development workflow responsibly
• Understanding of AI limitations and when to override AI suggestions

Nice to have:

• Multiple NestJS services ownership experience
• Redis experience
• AWS services (Cognito, S3, SNS)
• Docker and CI/CD knowledge
• Financial or trading system background
• High-scale systems experience (thousands of requests/second)
• Open source contributions
• Technical leadership experience
• Advanced experience with AI-assisted backend development
• Experience optimizing APIs and databases using AI-powered analysis tools
• Experience mentoring junior developers

Tech Stack

Backend: Node.js, NestJS, TypeScript, PostgreSQL, Redis, Kafka (AWS MSK)

Frontend: React, Next.js, TypeScript, Tailwind CSS, Radix UI

Infrastructure: AWS (ECS, RDS, ElastiCache), Docker, Jenkins, Terraform

Services you'll support:

• Storefront API - E-commerce, orders, payments
• Notification Service - Push notifications, events
• Segmentation Engine - User targeting, rules
• Game Data Snapshot - Game state management
• Next.js Web App - Customer-facing storefront and admin interfaces

Why Join Us

• Hands-on engineering work, no meetings
• Real full-stack ownership—you see features through from concept to production
• Fast-paced startup environment with technical challenges
• Work on systems that actually matter
• Opportunity to grow technically and take on more responsibility
• Small team, flat hierarchy, direct access to leadership
• Herzliya location with full support