Senior Full-Stack Dev - AI-Powered Platform (Remote)

5Blue Software; Portugal; Remote; EUR 70,000 - 95,000; Full time

Benefits offered by this job

Remote work opportunities

1:1 English classes

Premium medical insurance

Great international team

Equipment provided

Accounting support in Ukraine and/or/—

Job summary

5Blue Software is seeking a Senior Full-Stack Developer to own features across frontend and backend in a remote, global team. You will build end-to-end capabilities using React, TypeScript, and Node.js while shaping architecture and integrating AI-powered features.

The role requires deep experience with API design, cloud platforms, and modern databases, plus a proven ability to work independently and discuss trade-offs in English.

Qualifications

• 5+ years of professional software development experience, with strong Node.js expertise.
• 2+ years of professional React experience with modern frontend development.
• Strong TypeScript proficiency and experience with API frameworks (Express/Fastify).
• Experience with microservices, cloud platforms (AWS/GCP/Azure), and both relational and non-relational databases.
• Experience integrating third-party REST APIs and building AI-powered features; familiarity with AI-assisted coding tools.
• Ability to work independently, participate in Agile ceremonies, and communicate complex decisions in English.

Responsibilities

• Build end-to-end features using React, TypeScript, and Node.js.
• Develop scalable frontend experiences for a complex B2B product.
• Design backend services, APIs, and third-party integrations.
• Integrate AI-powered features into production environments.
• Contribute to system design, architecture, and technical decisions.
• Collaborate with Engineering and Product to clarify requirements.

Skills

English proficiency B2+

Independent problem solving

Education

Degree in Computer Science or related field

Tools

React

Node.js

TypeScript

Express / Fastify

AWS

GCP / Azure

PostgreSQL

MongoDB

REST APIs

Docker

Kubernetes

Claude Code

LangChain

LangGraph

AI-assisted coding tools

Job description

5Blue Software is seeking a Senior Full-Stack Developer to own features across frontend and backend in a remote, global team. You will build end-to-end capabilities using React, TypeScript, and Node.js while shaping architecture and integrating AI-powered features.

The role requires deep experience with API design, cloud platforms, and modern databases, plus a proven ability to work independently and discuss trade-offs in English.