Full Stack Developer

The Opportunity

FE International/LTV SaaS Growth are currently looking for a highly skilled Full Stack Developer to build and scale a SaaS product. The ideal candidate should have strong backend expertise, experience with scalable architectures, and hands-on exposure to cloud-native systems and search-driven applications.

You will be responsible for designing, developing, and optimizing backend services, APIs, and infrastructure that power a high-performance, AI-driven writing and productivity platform.

Key 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

Required Skills

• 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

Preferred / Nice to Have

• 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

What We’re Looking For

• 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 (plus)