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5Blue Software
Development 8h ago

Senior Full-Stack Developer (AI-Powered B2B Platform)

5Blue Software
UkraineUkraine
RomaniaRomania
PolandPoland
SwedenSweden
PortugalPortugal
SlovakiaSlovakia
BulgariaBulgaria
CroatiaCroatia
SloveniaSlovenia
GermanyGermany
BelgiumBelgium
DenmarkDenmark
FranceFrance
SpainSpain
🌍Czechia
Full-time
Not Disclosed
Senior-Level
VT

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Job Description

Remote development roles on HireSkys cover frontend, backend, full-stack, DevOps, and QA work. Employers here usually name their exact stack in the description — compare the required tools against your own experience before applying, and use the Skill Gap Analyzer below to spot what to learn next.

Key Skills Required

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React57mFree Trial ✨
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Node.js40mFree Trial ✨
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DevOps1h 38mFree Trial ✨
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AI & Machine LearningTypeScript

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We're looking for a Senior Full-Stack Developer who can work confidently across frontend and backend, take ownership of features from initial design to production, and contribute to architectural decisions.

About the Project

The platform automates complex processes such as evidence collection, continuous monitoring, audit preparation, and certification workflows, helping businesses reduce manual effort and manage compliance more efficiently.

You'll work as part of a collaborative international engineering team distributed across Europe, Israel, and South Africa, contributing directly to product development and technical decisions.

What You'll Do

  • Build and deliver end-to-end features using React, TypeScript, and Node.js.

  • Develop performant, scalable, and user-friendly frontend experiences for a complex B2B product.

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

  • Build and integrate AI-powered features into a production environment.

  • Contribute to system design, architecture, and technical decision-making.

  • Use AI-assisted development tools such as Claude Code or similar as part of your everyday workflow.

  • Review, test, debug, and validate AI-generated code, ensuring you understand and take ownership of the final implementation.

  • Work with relational and non-relational databases and make appropriate technical choices based on product requirements.

  • Contribute to CI/CD, testing, deployment, and DevOps processes for the features you build.

  • Collaborate directly with Engineering and Product to clarify requirements and develop effective technical solutions.

  • Participate in Agile ceremonies and collaborate with teammates across different locations and time zones.

  • Communicate your thought process clearly, explain technical decisions, and discuss trade-offs in English.

What We're Looking For

  • 5+ years of professional software development experience, with approximately 5+ years of Node.js experience as a guideline.

  • 2+ years of professional React experience, with a solid understanding of modern frontend development.

  • Strong practical experience with TypeScript.

  • Hands-on experience with Express, Fastify, or a similar API framework.

  • Strong full-stack capabilities, with the ability to work independently across frontend and backend.

  • Production experience with microservices architecture.

  • Hands-on experience with AWS or a comparable cloud platform, such as GCP or Azure.

  • Practical experience with both relational and non-relational databases, such as PostgreSQL and MongoDB.

  • Experience integrating third-party REST APIs into production systems.

  • Experience building and shipping AI-powered features in a real product, such as AI agents, generative AI functionality, or RAG-based solutions.

  • Experience using AI-assisted coding tools, such as Claude Code or equivalent.

  • The ability to independently write, understand, debug, and validate code without relying on AI tools.

  • Working knowledge of DevOps, QA, testing, and CI/CD.

  • English proficiency at B2 level or higher.

  • Experience working in a product-focused engineering environment.

Nice to Have

  • Experience with LangChain, LangGraph, or similar AI/agent frameworks.

  • Practical Python experience alongside your primary technology stack.

  • Experience with Docker, Kubernetes, or other containerization technologies.

  • A degree in Computer Science, Software Engineering, or a related field.

  • Experience mentoring other engineers or contributing to architectural and design decisions.

  • Experience working with distributed, international Agile teams.

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5Blue Software

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5Blue Software (operating under 5bsoftware.com, legally 5Blue Software Ltd.) is a premier, enterprise-grade technology outstaffing, dedicated software engineering, and AI implementation powerhouse engineered to serve as the definitive, high-velocity R&D scale-up, staff augmentation, and fractional CTO-as-a-Service layer for tech startups, scaling mid-market companies, and global enterprise leaders across Israel, Europe, and North America. Founded with leadership from a deep tech background, the firm completely eliminates the severe systemic friction of modern engineering talent acquisition—where tech companies face crushing local developer shortages, burn critical financial runway on prolonged hiring cycles, and struggle with the complex compliance, payroll, and cultural management overhead of remote engineering units—by deploying a highly structured, fully managed nearshore and offshore talent optimization matrix. Moving far beyond traditional, passive recruiting agencies or low-signal freelance marketplaces, 5Blue Software natively unifies a vetted proprietary database of over 10,000 elite technical talents (spanning highly specialized engineering ecosystems across Ukraine and Central Europe), deep engineering leadership architecture audits, and a full-cycle, 6-step recruitment and onboarding framework into a high-availability R&D delivery ecosystem. Acting as an end-to-end operational shield, the company handles the entire cross-border administrative lifecycle—incorporating localized market research, multi-jurisdiction compliant payroll execution, strict employment law adherence, localized taxation management, and employee benefit programs—allowing clients to integrate elite dedicated engineering squads into their core codebases in under a fraction of standard timelines. The production-hardened firm serves as a long-term strategic R&D growth partner for prominent global tech titans and venture-backed innovators alike, maintaining an elite multi-year partnership with New York-based adtech giant Taboola (scaling their R&D node with over 20 dedicated data science, mobile, and backend engineers) alongside core programs for Qualcomm, Melingo, Session42, AllCloud, Browswear, and RxWare. Under the hood, its operational engine leverages advanced competency evaluation matrices, comprehensive technical coding assessments, and multi-cloud DevOps pipelines designed to deploy specialized talents across major tech stacks (including advanced Node.js backend nodes, React/Next.js frontend architectures, cross-platform iOS/Android mobile apps, and robust Python-driven machine learning models). The firm provides tailored AI agent architectures, predictive data analytics, and scalable SaaS foundations without reducing development velocity or disrupting internal team cultures. What sets 5Blue Software apart is its uncompromising dedication to replacing volatile, unvetted contractor hiring with absolute R&D predictability, legal-tier corporate compliance, and predictable scaling costs; by combining high-signal technical validation with total administrative support, the organization remains a definitive cornerstone of modern algorithmic outstaffing and global digital product engineering transformation.

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