Senior Fullstack Engineer (React, Node.js, AI)

TL;DR

Senior Fullstack Engineer (React, Node.js, AI): Designing and developing scalable full-stack applications and integrating AI/ML capabilities into an ad-tech platform with an accent on high-performance distributed systems, microservices architecture, and real-time data processing. Focus on building core infrastructure for massive event tracking, enhancing platform capabilities with agentic workflows, and shaping architecture in a fast-paced startup environment.

Location: Remote (Poland)

Company

hirify.global is a custom product engineering company that supports multinational organizations and scaling startups to solve complex business challenges.

What you will do

• Design, develop, and maintain scalable full-stack applications using React, Node.js, and Python.
• Develop the core product offering to track and analyze billions of events on websites and apps.
• Integrate AI/ML capabilities into the platform, including LLM APIs and on-premise model deployments.
• Build agentic workflows and AI-powered automation to enhance platform capabilities.
• Collaborate with product, data science, and engineering teams to deliver end-to-end solutions.
• Mentor junior developers and contribute to engineering best practices.

Requirements

• 5+ years of professional software development experience.
• Strong proficiency in JavaScript/TypeScript, React, and Node.js.
• Solid experience with Python for backend development and data processing.
• Experience building high-performance, low-latency distributed systems.
• Strong understanding of RESTful APIs, microservices architecture, and cloud platforms (AWS/GCP).
• Experience with databases (SQL and NoSQL) and data streaming technologies.
• Excellent problem-solving skills and ability to work autonomously.
• Strong communication skills and collaborative mindset.

Culture & Benefits

• Enjoy flexibility with full remote working possibilities.
• Work alongside top professionals in a friendly, open-door environment.
• Take on large-scale projects with global impact and expand your expertise.
• Boost skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications.
• Explore diverse domains through internal mobility.
• Receive company-paid medical insurance, mental health support, and financial & legal consultations.