#LI-Remote
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
Minimum 5 years of experience, including at least 2 years in end-to-end backend development.
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)