{"id":2380699,"url":"https://alion.io/job/comet-full-stack-engineer","title":"Full Stack Engineer","company":{"id":38278,"name":"Comet","domain":"comet.com","url":"https://alion.io/company/comet-com","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":null,"work_mode":"remote","remote_scope":"stated_regions","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Tel Aviv, Israel","Israel"],"countries":["IL"],"hiring_countries":["US","DE","FR","GB","AT","BE","BG","HR","CZ","DK","FI","HU","IE","IL","IT","NL","NO","PL","RO","ES","SE","CH","EE","GR","IS","LV","LI","LT","LU","MT","PT","SK","SI"],"hiring_countries_total":33,"salary":null,"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Claude","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Diffusion Models","optional":false},{"name":"Gemini","optional":false},{"name":"GPT-5","optional":false},{"name":"Java","optional":false},{"name":"LLM","optional":false},{"name":"Machine Learning","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"RAG","optional":false},{"name":"React.js","optional":false},{"name":"TypeScript","optional":false},{"name":"Windsurf","optional":false},{"name":"CI/CD","optional":true},{"name":"JavaScript","optional":true},{"name":"Prompt Engineering","optional":true}],"status":"live","first_seen_at":"2026-02-05T16:14:35Z","employer_posted_date":"2026-05-28","last_verified_at":"2026-10-13T12:41:49Z","board_verified":true,"closed_at":null,"days_open":249,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":249},"description":"About Comet\nComet 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. \nWorking 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.\nComet 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).\nYou are:\nWe 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.\nReady to shape the future of LLM development? Join us in building the next generation of AI observability tools!\nResponsibilities:\nBuild & ship features at high pace in a fast-moving AI development environment\nDevelop and maintain comprehensive observability tools for LLM applications and RAG systems\nCreate intuitive user interfaces for LLM tracing, evaluation dashboards, and production monitoring\nBuild robust APIs and backend services to support real-time LLM application monitoring\nCollaborate with AI researchers and ML engineers to implement cutting-edge evaluation methodologies\nContribute to both frontend (React/TypeScript) and backend (Java) components\nDesign and implement automated evaluation systems and \"LLM as a Judge\" capabilities\nWork on integrations with popular LLM frameworks and libraries\nParticipate in open-source community engagement and technical documentation\nRequirements:\nExperience: 3+ years of full-stack development experience, preferably in AI/ML domains\n 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)\n Model Knowledge: Deep understanding of different AI model capabilities, limitations, and appropriate use cases (GPT-5, Claude, Gemini, etc.)\nFrontend Development: Expertise in React, TypeScript and modern web development practices\nBackend Development: Strong proficiency in Java with frameworks like Dropwizard\nDatabase & Infrastructure: Knowledge of scalable database design and containerization\nObservability Tools: Experience with tracing, monitoring, and evaluation systems\nCollaboration: Strong communication skills for working in a distributed, global team environment\nProblem Solving: Ability to work in ambiguous environments and solve complex technical challenges\nNice to have:\nOpen Source: Experience contributing to or maintaining open-source projects \nAI/ML Experience: Understanding of Large Language Models, RAG systems, and AI application architectures\nPreferred Qualifications:\nExperience with model evaluation, prompt engineering, and LLM optimization\nKnowledge of distributed systems and high-throughput data processing\nFamiliarity with ML experiment tracking and model monitoring platforms\nExperience with DevOps practices and CI/CD pipelines\nUnderstanding of AI safety, model security, and responsible AI practices\nWhat We Offer:\nCompetitive salary, based on proven experience, skills and location.\nCompetitive benefits package.\nFlexible working hours and remote/Hybrid work options.\nOpportunities for professional growth and development.\nA collaborative and innovative work environment.\nThe chance to work with cutting-edge technologies and projects.\nThis 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.\n\nComet is an equal-opportunity employer. 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