Full Stack Developer

#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)