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5
5bluesoftware

Senior Full Stack AI-first Saas Engineer

Ukraine
5+ years exp
Full-time
Posted 3d ago
0 views
Actively Hiring Urgent Opening Direct 1-Click Apply

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Job Description

Hi there!

We are currently looking for a strong

Full-Stack Developer-AI-First SaaS Engineer

  • About Us:
    5Blue Software is an Israeli-Ukrainian software development company specializing in custom software development, staff augmentation, dedicated engineering teams, AI solutions, and CTO-as-a-Service. We help startups and mid-sized companies scale faster with vetted engineering talent across Europe.

  • About the project:
    Join a fast-growing AI-first product company building a B2B SaaS platform that helps organizations simplify security, compliance, and AI governance.
    The platform automates processes that traditionally require significant manual work — from evidence collection and monitoring to audit preparation and certification workflows.
    You'll join a lean, highly collaborative international engineering team distributed across Europe, Israel, and South Africa.

  • About the role:
    We're looking for a

Senior Full-Stack Developer

who is comfortable working across both frontend and backend and enjoys taking ownership of features from idea to production.
This is an

AI-first engineering environment

. AI is used both as part of the product and as a standard part of the development workflow. You'll use AI-assisted development tools to accelerate implementation, debugging, testing, and refactoring while maintaining strong engineering judgment and the ability to write and understand code independently.
You'll work closely with Engineering and Product on system design, architecture, and feature development, with a particular focus on building high-quality React experiences while contributing confidently to the backend.

  • What you'll do:
  • Build and deliver full-stack features end to end using

React, TypeScript, and Node.js

.

  • Develop intuitive, performant, and scalable frontend experiences for a complex B2B SaaS product.

  • Implement backend services, APIs, business logic, and third-party integrations.

  • Develop and integrate

AI-powered product features

.

  • Participate in system design and architectural decisions.

  • Use AI-assisted development tools such as

Claude Code or similar

as part of your everyday workflow.

  • Review, debug, test, and improve AI-generated code while maintaining ownership of the implementation.

  • Take responsibility for the CI/CD and DevOps aspects of the features you build.

  • Work closely with Engineering and Product to define requirements and technical solutions.

  • Participate in Agile ceremonies and collaborate with a distributed international team.

  • Communicate technical decisions clearly and confidently in English.

  • What we're looking for:

5+ years of professional software development experience

, with roughly

5+ years of experience with Node.js

as a guide rather than a hard line. Real depth in a closely related stack can also count.

2+ years of professional experience with React

as a guide.

  • Strong experience with

TypeScript

.

  • Hands-on experience with

Express, Fastify, or a similar API framework

.

  • Strong full-stack capabilities and the ability to work comfortably across frontend and backend, even with a natural lean toward side.

Production experience with microservices architecture.

  • Working familiarity with

AWS or a comparable cloud provider

such as GCP or Azure.

  • Hands-on experience with both

relational and non-relational databases

, such as PostgreSQL and MongoDB or similar.

  • Experience integrating

third-party REST APIs

into a production system, beyond just building your own API endpoints.

  • Real experience

shipping AI-powered features in a live product

, not just experimenting with AI on personal projects.

  • Experience using

AI tools such as Claude Code or similar

as a genuine part of your development workflow, balanced with the ability to write and debug code yourself, unaided, live.

  • Working proficiency in

DevOps, QA, and CI/CD

at the level expected of a senior engineer, not a dedicated DevOps hire.

  • Strong spoken English, comfortable holding a real-time technical conversation such as a system design discussion.

  • A background from a

product or SaaS company

rather than a project-based agency. Experience in security, compliance, GRC, or developer-tools SaaS is a natural fit, though not required.

  • Nice to have:
  • Experience with

LangChain, LangGraph, or a comparable agent/AI framework

.

Python

experience alongside your primary stack.

  • Experience with

Docker, Kubernetes, or containerization

more broadly.

  • A

CS / Software Engineering

academic background.

  • A track record as the

front-end "champion"

on a full-stack team: someone who can carry that surface area while still holding their own on the backend.

  • What we offer:
    —
  • Flexible Work Environment: Opportunity to work remotely.
    —
  • 1:1 English Classes: Individual English language training.
    —
  • Premium Medical Insurance: Comprehensive health insurance.
    —
  • Great Team: Supportive, collaborative, and dynamic international team.
    —
  • Equipment Provided: All necessary equipment supplied.
    —
  • Accounting Support: Full accounting assistance in Ukraine and Poland.
    —
  • Paid Time Off: 18 days of annual vacation and 7 days of sick leave without a doctor's note.
    —
  • Flexible Payment System: Convenient payment solution with multiple withdrawal options.

If you're a strong full-stack engineer who enjoys building real products, taking ownership, and using AI to become a more effective developer — we'd love to hear from you.

Key Requirements & Skills

  • Experience with

LangChain, LangGraph, or a comparable agent/AI framework

.

Python

experience alongside your primary stack.

  • Experience with

Docker, Kubernetes, or containerization

more broadly.

  • A

CS / Software Engineering

academic background.

  • A track record as the

front-end "champion"

on a full-stack team: someone who can carry that surface area while still holding their own on the backend.

Benefits & Perks

we offer:

—

Flexible Work Environment:

Opportunity to work remotely.

—

1:1 English Classes:

Individual English language training.

—

Premium Medical Insurance:

Comprehensive health insurance.

—

Great Team:

Supportive, collaborative, and dynamic international team.

—

Equipment Provided:

All necessary equipment supplied.

—

Accounting Support:

Full accounting assistance in Ukraine and Poland.

—

Paid Time Off:** 18 days of annual vacation and 7 days of sick leave without a

Frequently Asked Questions

How to apply for Senior Full Stack AI-first Saas Engineer at 5bluesoftware?

Click the "Apply on Company Website" button on this page to submit your application directly on the employer's official portal.

What is the salary for this role?

Salary details will be discussed during the interview.

What experience is required?

5+ years of experience is required.

Is this position still open?

Yes, currently active and accepting applications.

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5

5bluesoftware

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Senior Full Stack AI-first Saas Engineer

5bluesoftware · Ukraine

Apply on Company Website