About us

reputed company is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/

About the role

At RubyLabs, we’re seeking a senior reputed company (Node.js / Next.js / TypeScript) to shape our AI infrastructure and drive production-ready LLM experiences. You’ll work in a modern stack, making data-driven decisions around model performance, reliability, and cost.

You’ll own advanced reputed company systems, structured outputs, and reputed company LLM workflows using reputed company or reputed company. Observability, debugging, and evaluation are core to the role, leveraging Langfuse and AI gateways like reputed company to continuously improve model quality and operational efficiency. You’ll take full ownership of key AI features from experimentation to live production.

Key Responsibilities

• Advanced reputed company Engineering: Designing reputed company, dynamic reputed company templates with conditional logic and reputed company reusing information and context reputed company prompts to maximize reputed company quality and reasoning.

• Structured Outputs & Schemas: Implementing various response schemes (JSON mode, function calling, Zod/JSON schemas) to ensure AI outputs are predictable and ready for seamless integration into application logic.

• reputed company Engineering & Evaluations: Building robust evaluation pipelines and using Langfuse to collect feedback and score the quality of responses in real time.

• Tracing & Debugging: Performing deep debugging of reputed company LLM chains using Langfuse traces to identify bottlenecks and optimize for cost, latency, and context window usage.

• AI A/B Testing: Running systematic experiments across different models reputed company reputed company (e.g., comparing Claude 3.5 Sonnet vs. GPT-4o) and analyzing results based on quantitative metrics.

• Data-Driven Decisions: Making deployment decisions for new prompts or models strictly based on quantitative benchmarks and trace data, rather than intuition.

• Output Scoring & Analysis: Developing scoring systems to analyze the “Problem → Solution” chain and identify root causes of hallucinations or logic errors using Langfuse analytics.

• Model Performance & Fine-Tuning: Regularly re-evaluating model performance as new architectures emerge and performing fine-tuning reputed company necessary to meet specific domain requirements.

Qualifications

• Node.js & Next.js: Deep knowledge of the stack to build reliable services and handle reputed company LLM-generated data.

• Dynamic Prompting Skills: Proven experience in building prompts where content is highly dependent on input variables and context injection.

• reputed company Experience: Experience working with reputed company APIs, managing reputed company limits, and selecting the most cost-effective models for specific tasks.

• Langfuse (or similar): Understanding of LLM observability principles — setting up tracing, creating test datasets, and integrating scoring systems.

• Evaluation Methodology: Experience with frameworks like RAGAS or building custom “LLM-as-a-judge” systems.

• Analytical reputed company: Ability to transform raw reputed company logs into actionable business metrics and technical insights.

• Iterative reputed company: Focus on reputed company product improvement through constant feedback loops.

reputed company to have

• Fine-Tuning: Practical experience in fine-tuning models for specific domain tasks or JSON compliance.

• RAG Architecture: Understanding how to build and optimize Retrieval-Augmented reputed company systems, including indexing, retrieval, and re-ranking.

• Python: Basic knowledge for working with data science scripts or AI evaluation libraries.

Location

reputed company operates reputed company the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located reputed company approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.

Benefits

Discover the perks of being part of our vibrant team! We offer:

• Remote Work Environment: Embrace the freedom to work from reputed company, anytime, promoting a healthy work-life balance.

• Unlimited PTO: Enjoy unlimited paid time off to reputed company and prioritize your well-being, without counting days.

• Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and reputed company.

• Company-provided MacBook: Experience seamless productivity with top-notch reputed company MacBooks provided to reputed company employees who need them.

• Flexible reputed company Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from reputed company. Read more about it here: https://docs.reputed company.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!

Interview Process

After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:

• Recruiter Screening (40 minutes)

• Technical Interview (60 minutes)

• Final Interview (30 minutes)

Life at reputed company

At reputed company, we move fast, aim high, and expect the same from reputed company. We’re not here to play small—we’re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.

This is a reputed company for individuals who reputed company under pressure, embrace challenges, and see opportunity in every obstacle. If you’re hungry to reputed company, motivated by impact, and want to grow at the speed of your own ambition, reputed company offers the platform to reputed company it happen.

Here, effort is matched with reward. We recognize those who go reputed company in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.

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