5bluesoftware - Senior Full Stack AI-first Saas Engineer

Ukraine3w ago

In Office Senior EMEA Cloud Computing Software Cloud Engineer Senior Full Stack Developer Full Stack Node.js React Express Fastify

Requirements

• 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. • 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 one 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. • 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.

Responsibilities

• 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.

Benefits

• — 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.