Full Stack Developer

FE International/LTV SaaS Growth is seeking a highly skilled Full Stack Developer to build and scale a SaaS product, focusing on backend expertise, scalable architectures, cloud-native systems, and search-driven applications.

Responsibilities

• Design and build scalable backend systems for a high-performance SaaS product
• Architect and implement RESTful APIs to support web and product features
• Translate product requirements into efficient system and database designs
• Optimize system performance for speed, scalability, and reliability
• Design data flow across services involving search, caching, and asynchronous processing
• Build and maintain secure and reliable cloud-based infrastructure on AWS
• Implement and manage containerized services for deployment and scaling
• Ensure system observability through logging, monitoring, and error tracking
• Collaborate with product and engineering teams to define technical solutions
• Participate in architecture decisions for scaling multi-tenant SaaS systems
• Identify bottlenecks in existing systems and implement performance improvements
• Ensure code quality through reviews, testing practices, and engineering standards

Requirements

• Node.js and Express.js: server-side development, REST API design, middleware patterns
• Deep understanding of JavaScript (ES6+, async/await, event loop)
• MySQL (schema design, optimization, connection pooling)
• Redis (caching, sessions, rate limiting)
• Elasticsearch (indexing, querying, lifecycle management)
• Hands on experience with AWS services: EC2, RDS (Aurora), ElastiCache, SQS, S3, SES, ECR, ECS
• Strong experience with Docker & Docker Compose
• Writing Dockerfiles and managing containerized deployments
• Git version control and branching strategies

Additional Information

• Experience with Stripe API (subscriptions, billing, webhooks)
• Understanding of SaaS billing models (subscriptions, trials, usage-based pricing)
• Experience with Elasticsearch custom analyzers & text similarity
• Exposure to third-party APIs such as: Customer.io, TaxJar, reCAPTCHA, Azure Cognitive Services
• Strong problem-solving ability and system design mindset
• Experience building scalable SaaS or high-traffic backend systems
• Ownership mindset and ability to work in fast-paced environments
• Interest in AI-powered productivity or writing tools