Senior AI-First Full-Stack SaaS Engineer (Remote)

5Blue Software; United States; Remote; USD 140,000 - 190,000; Full time

Benefits offered by this job

Flexible remote work

English classes

Medical insurance

International team

Equipment provided

Accounting support

Paid time off

Flexible payment options

Job summary

5Blue Software is hiring a Senior Full-Stack Developer for an AI-first B2B SaaS product. You’ll own features from idea to production, balancing frontend and backend work with a focus on React experiences and robust backend services.

You’ll work in an AI-enabled development environment, using Claude Code and related tools daily, collaborating with a distributed team across Europe, Israel, and Africa. Remote-friendly and product-driven.

Qualifications

• 5+ years of professional software development experience with strong backend and frontend skills.
• 2+ years of professional experience with React.
• Strong TypeScript proficiency and API framework experience (Express or Fastify).
• Production experience with microservices and cloud providers (AWS, GCP, Azure).
• Experience shipping AI-powered features in a live product.
• Experience integrating third-party REST APIs into production systems.
• Fluent English and clear communication in technical discussions.
• Background in product or SaaS companies; security/compliance knowledge is a plus.

Responsibilities

• Build and deliver full-stack features end to end using React, TypeScript, and Node.js.
• Develop frontend experiences for a complex B2B SaaS product.
• Implement backend services, APIs, business logic, and integrations.
• Develop and integrate AI-powered product features.
• Participate in system design and architectural decisions.
• Use Claude Code or similar AI tools daily to accelerate work.
• Review, debug, test, and improve AI-generated code with ownership.
• Own CI/CD and DevOps aspects for the features built.
• Collaborate with Engineering and Product to define requirements.
• Participate in Agile ceremonies; work with a distributed team.
• Communicate technical decisions confidently in English.

Skills

Node.js

React

TypeScript

Express / Fastify

API design

Microservices

AWS

PostgreSQL

MongoDB

REST APIs

AI integration

Education

CS / Software Engineering background

Tools

Claude Code

Docker

Kubernetes

LangChain

Job description

5Blue Software is hiring a Senior Full-Stack Developer for an AI-first B2B SaaS product. You’ll own features from idea to production, balancing frontend and backend work with a focus on React experiences and robust backend services.

You’ll work in an AI-enabled development environment, using Claude Code and related tools daily, collaborating with a distributed team across Europe, Israel, and Africa. Remote-friendly and product-driven.