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)