Senior Fullstack Engineer (AI)

TL;DR

Senior Fullstack Engineer (AI): Building and optimizing core infrastructure for an ad-tech analytics platform with an accent on API design, real-time data processing, and AI/ML integration. Focus on shaping architecture, solving complex distributed system challenges, and delivering end-to-end solutions in a fast-paced startup environment.

Location: Remote from Romania

Company

hirify.global is a custom product engineering company partnering with a 3-month-old, seed-funded ad-tech startup that is building infrastructure analytics for publishers.

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.
• Develop integrations with Supply-Side Platforms (SSPs) and Demand-Side Platforms (DSPs).
• Integrate AI/ML capabilities, including LLM APIs and on-premise model deployments, and build agentic workflows.
• 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 a collaborative mindset.

Culture & Benefits

• Opportunity to be part of the founding engineering team, shaping architecture and product direction.
• High-impact engineering work on a platform processing massive amounts of real-time data.
• "No-Micromanagement" culture with high autonomy.
• Modern tech stack including Node.js, TypeScript, and AI-native solutions.
• Stability of a seed-funded company with startup excitement.
• Access to learning resources like Udemy, language courses, and company-paid certifications.
• Medical subscription and meal tickets.
• Radical flexibility to work remotely or from an office.