Company

Technology

SeniorFull-StackSoftwareEngineer,AppliedAI

€160–240k ~AI est. Romania FULL TIME Remote Friendly
Market Sentiment
HIGH DEMAND

Neural analysis suggests this role is
optimal for Senior candidates.

The Brief

“Senior Full-Stack Software Engineer, Applied AI. Skills: Full-stack development, Applied AI, LLM systems. Design full-stack AI features. Build full-stack AI features”

What You'll Achieve.

Measurable outcomes

Industry & Context.

Technology
Problems you'll solve

Troubleshooting

What They're Looking For.

Must Have

6+ years of experience as a full-stack engineer, Proficiency in Ruby on Rails, Proficiency in ReactJS, Proficiency in relational databases, Hands-on experience building production AI features, Proven ability to design and run experiments, Understanding of backend and frontend systems, Experience working in scalable, performance-sensitive environments, Excellent English communication skills

Nice to Have

Experience with RAG systems, Experience with AI agents, Experience with LLM-powered tools, Experience with A/B testing, Experience with evaluation frameworks, Experience with iterative product testing

What You'll Do.

Design full-stack AI features

Build full-stack AI features

Optimize full-stack AI features

Contribute to experimentation

Contribute to system reliability

Contribute to continuous product improvement

Ship full-stack AI features

Build AI infrastructure components

Maintain AI infrastructure components

Develop LLM-based solutions

Improve LLM-based solutions

Collaborate with product managers

Collaborate with designers

Collaborate with engineering peers

Define feature direction

Improve engineering processes

Translate insights into implementations

Ensure high standards of code quality

Ensure high standards of system design

Ensure high standards of user experience

How You'll Work.

Team & Collaboration

Cross-functional teams; Engineering peers

Communication Scope

English communication

Process & Methodology

Rapid iteration

Full Job Description

## Accountabilities You will design, build, and optimize full-stack AI features end-to-end while contributing to experimentation, system reliability, and continuous product improvement across AI-powered experiences. Ship full-stack AI features using Ruby on Rails and React across production systems Design and run experiments, including A/B tests and AI evaluations, to measure feature impact Build and maintain AI infrastructure components, including LLM-based systems and inference workflows Develop and improve RAG systems, AI agents, and other applied LLM-based solutions Optimize performance, scalability, and reliability of AI-driven features in production Collaborate closely with product managers, designers, and engineering peers to define feature direction Continuously improve engineering processes and tooling to support rapid AI iteration Stay current with emerging AI research and translate insights into practical implementations Ensure high standards of code quality, system design, and user experience across releases Requirements: You bring strong full-stack engineering experience at scale, combined with hands-on exposure to building and shipping AI-powered features in real production environments. You are comfortable working across ambiguity, experimentation, and fast iteration cycles. 6+ years of experience as a full-stack engineer on high-traffic production applications Strong proficiency in Ruby on Rails, ReactJS, and relational databases (PostgreSQL/MySQL) Hands-on experience building production AI features such as RAG systems, AI agents, or LLM-powered tools Proven ability to design and run experiments (A/B testing, evaluation frameworks, iterative product testing) Strong understanding of backend and frontend systems, with ability to work across the stack Experience working in scalable, performance-sensitive environments Comfort operating in fast-paced, ambiguous environments with evolving requirements Strong collaboration skills and ability to work closely

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