---
title: 'Full Stack Engineer at Comet'
canonical: 'https://feeny.ai/job/full-stack-engineer-comet-israel-europe-5dfybxd6y40n'
type: 'job'
last_seen: '2026-09-09'
---

# Full Stack Engineer at Comet

- **Company:** Comet
- **Location:** Israel / Europe
- **Work type:** remote
- **Posted:** 2026-02-05
- **Last confirmed live:** 2026-09-09
- **Apply:** https://www.comet.com/site/about-us/careers/job/?gh_jid=7620184003

## Job description

## About Comet

Comet is building the development platform for teams who want to ship robust, reliable, and responsible AI applications. Opik, our open source LLM evaluation framework, has quickly become one of the most popular tools in the space. Our experiment management platform is used by data scientists at companies like Uber, Netflix, and Etsy. Tens of thousands of researchers, engineers, academics, and hobbyists use Comet every day to build the future of AI.

Working at Comet will give you access to the most exciting work being done in all areas of machine learning. Some of the top researchers and companies working on self-driving cars, drug discovery, particle research, diffusion models, and LLMs use Comet every day. Your work has the potential to accelerate the development of some of the most impactful technology in the world, and you will be doing it alongside a team of passionate, caring individuals. If that sounds exciting, Comet is the right place for you.

Comet is backed by more than $63 million in venture capital funding and powers some of the best machine-learning teams in the world, including Netflix, Uber, Etsy, and Mobileye. We are a remote-first company with offices in New York City (USA) and Tel Aviv (Israel).

You are:

We are seeking a talented Full Stack Engineer to join our team and help build the Opik product! Opik is an open-source platform designed to streamline the entire lifecycle of LLM applications, helping developers evaluate, test, monitor, and optimize their models and agentic systems.

Ready to shape the future of LLM development? Join us in building the next generation of AI observability tools!

Responsibilities:

- Build & ship features at high pace in a fast-moving AI development environment
- Develop and maintain comprehensive observability tools for LLM applications and RAG systems
- Create intuitive user interfaces for LLM tracing, evaluation dashboards, and production monitoring
- Build robust APIs and backend services to support real-time LLM application monitoring
- Collaborate with AI researchers and ML engineers to implement cutting-edge evaluation methodologies
- Contribute to both frontend (React/TypeScript) and backend (Java) components
- Design and implement automated evaluation systems and "LLM as a Judge" capabilities
- Work on integrations with popular LLM frameworks and libraries
- Participate in open-source community engagement and technical documentation

Requirements:

- Experience: 3+ years of full-stack development experience, preferably in AI/ML domains
- AI Development Tools: Hands-on experience with AI-assisted coding environments, IDEs, and agent-based workflows (e.g., Cursor, Windsurf, GitHub Copilot, Codex, Claude Code, and similar platforms)
- Model Knowledge: Deep understanding of different AI model capabilities, limitations, and appropriate use cases (GPT-5, Claude, Gemini, etc.)
- Frontend Development: Expertise in React, TypeScript and modern web development practices
- Backend Development: Strong proficiency in Java with frameworks like Dropwizard
- Database & Infrastructure: Knowledge of scalable database design and containerization
- Observability Tools: Experience with tracing, monitoring, and evaluation systems
- Collaboration: Strong communication skills for working in a distributed, global team environment
- Problem Solving: Ability to work in ambiguous environments and solve complex technical challenges

Nice to have:

- Open Source: Experience contributing to or maintaining open-source projects
- AI/ML Experience: Understanding of Large Language Models, RAG systems, and AI application architectures

Preferred Qualifications:

- Experience with model evaluation, prompt engineering, and LLM optimization
- Knowledge of distributed systems and high-throughput data processing
- Familiarity with ML experiment tracking and model monitoring platforms
- Experience with DevOps practices and CI/CD pipelines
- Understanding of AI safety, model security, and responsible AI practices

What We Offer:

- Competitive salary, based on proven experience, skills and location.
- Competitive benefits package.
- Flexible working hours and remote/Hybrid work options.
- Opportunities for professional growth and development.
- A collaborative and innovative work environment.
- The chance to work with cutting-edge technologies and projects.
- This role will be located in Tel Aviv, Israel (with hybrid flexibility) or in Europe (fully remote), working with a global team (large presence in the US, Tel Aviv and Europe), some flexibility with work hours is required to collaborate across time zones.

-

Comet is an equal-opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees without regard to race, religion, color, sex, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship status, uniform service member status, marital status, pregnancy, age, medical condition, physical or mental disability, genetic information/characteristics, and any other characteristic protected by State or Federal law.

## About Comet

## Company Overview
- **One-liner**: Comet provides an end-to-end AI evaluation and observability platform that helps developers build, evaluate, and improve modern AI applications and agentic systems.
- **Entity Type**: Private (raised $70M in total funding)
- **Headquarters**: New York City, USA (with an office in Tel Aviv, Israel)
- **Founded**: 2017
- **Founders**: Gideon Mendels (CEO) and Nimrod Lahav (CTO)

## Core Business
- **Primary industry/industries**: AI/ML Infrastructure, MLOps, LLM Observability & Evaluation
- **Target customers**: B2B; Enterprise AI/ML teams, startups, and academic research groups
- **Mission or purpose statement**: "To empower developers and teams to achieve business value with AI."

## Products & Services
- **Opik (Open-Source Platform)**: An end-to-end LLM observability and evaluation platform for generative AI applications and agentic systems. It provides tracing, evaluation, prompt optimization, and coding agent cost tracking. Available as an open-source self-hosted version or a managed cloud offering.
- **Comet Experiment Management**: The original MLOps platform for tracking, comparing, and managing machine learning experiments, including model versioning, hyperparameter tracking, and custom visualizations.
- **Cost Intelligence**: A feature within Opik that provides visibility into engineering teams' usage of coding agents (e.g., Claude Code, Codex) to track and optimize token spend.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed.
- **Key Metric**: $70M in total funding raised.
- **Notable Investors/Partners**: Not explicitly named on the company site, but the leadership team includes veterans from AWS, Grafana Labs, GitLab, Google, and VMware. The platform is trusted by over 150,000 developers and 450 enterprise, startup, and academic teams.
- **Growth Signals**: Over 150,000 developers trust the platform; 450+ teams (enterprise, startup, academic) use the product; Opik has become one of the fastest-growing open-source tools for LLM evaluation and observability; the company has a global, remote-first workforce of 80 employees across 14 countries.

## Competitive Advantages
- **Open-Source Core (Opik)**: By open-sourcing its core LLM observability and evaluation platform, Comet builds community trust, drives adoption, and benefits from community contributions, creating a strong moat against closed-source competitors.
- **End-to-End Platform**: Unifies experiment management (MLOps) with GenAI observability and evaluation (Opik) in a single platform, allowing teams to manage the full AI lifecycle from training to production.
- **Enterprise-Grade Reliability**: Opik is backed by Comet’s enterprise infrastructure, built to the standards of the world’s largest organizations, offering flexible hosting (self-hosted, cloud, custom).
- **Deep Integrations**: Easy integration with existing stacks via a few lines of code, supporting major LLM frameworks and coding agents like Claude Code and Codex.

## Strategic Focus
- **Unified AI Development Stack**: Comet is focused on consolidating the AI development workflow—experiment management, LLM observability, evaluation, and cost tracking—into one platform to help teams iterate faster and ship reliable AI applications.
- **Open-Source Community Growth**: Driving adoption of Opik as the leading open-source LLM evaluation and observability tool, with a rapidly expanding community of contributors and users.
- **Enterprise Adoption**: Sharp focus on helping enterprise teams evaluate, monitor, and trust AI systems in production, with a dedicated enterprise sales and customer success team led by veterans from Weights & Biases and Galileo.
- **Agentic AI Support**: Building features specifically for complex, multi-step agentic systems and coding agent cost optimization.

## Why Work Here
- **Remote-First Culture**: Comet is a remote-first company with a global workforce spanning 14 countries. Employees can work fully remotely or in a hybrid mode from offices in NYC and Tel Aviv.
- **Culture & Values**: Described as collaborative, risk-taking, and innovative, with a strong focus on customer focus, data-driven decision-making, and thought leadership in the AI engineering space.
- **Perks & Benefits**: Competitive salary and equity packages, healthcare/dental/vision insurance (where applicable), 401K account, vacation and parental leave, tax-free dependent care and commuter benefits, GrubHub membership with monthly stipend, ClassPass membership, and social events including virtual gatherings and annual company offsites.
- **Team & Environment**: 80 employees across 14 countries; monthly team get-togethers and annual offsites; hybrid work options available from NYC and Tel Aviv offices.
- **Glassdoor Ratings (via RemoteWeek)**: Overall 3.5, Culture 3.8, Work-Life Balance 3.8, Compensation & Benefits 3.0, Values 3.5.

## Sources
1. [comet.com](https://www.comet.com/site/)
2. [comet.com/about-us](https://www.comet.com/site/about-us/)
3. [comet.com/careers](https://www.comet.com/site/about-us/careers/)
4. [remoteweek.io](https://www.remoteweek.io/companies/comet/jobs)
5. [signalhire.com](https://www.signalhire.com/companies/comet-ml)

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