{"id":1140139,"url":"https://alion.io/job/perplexity-ai-member-of-technical-staff-machine-learning-research-engineer","title":"Member of Technical Staff (Machine Learning Research Engineer)","company":{"id":3,"name":"Perplexity AI","domain":"perplexity.ai","url":"https://alion.io/company/perplexity","size_band":"1001-5000","is_staffing_agency":false,"is_intermediary":false,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":81,"open_postings":35,"ghost_share":0,"stale_share":0.743,"repost_share":0,"time_to_fill_p50_days":52,"computed_at":"2026-09-23T05:45:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"staff","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"hiring_geo_confidence":"structured","locations":["Berlin, Germany"],"countries":["DE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":142000,"max_usd":316000,"period":"year","method":"role_seniority_country_cell","sample_n":9},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Contrastive Learning","optional":false},{"name":"DeepSpeed","optional":false},{"name":"FSDP","optional":false},{"name":"Machine Learning","optional":false},{"name":"Multimodal AI","optional":false},{"name":"Perplexity","optional":false},{"name":"PyTorch","optional":false},{"name":"RAG","optional":false},{"name":"Recommender Systems","optional":false}],"status":"live","first_seen_at":"2026-09-23T10:22:32Z","employer_posted_date":"2026-09-23","last_verified_at":"2026-09-23T15:53:47Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Perplexity is seeking an experienced Machine Learning Research Engineer to help build the next generation of advanced search technologies, with a focus on retrieval and ranking.\nResponsibilities\nRelentlessly push search quality forward - through models, data, tools, or any other leverage available\n\nArchitect and build core components of the search platform and model stack\n\nDesign, train, and optimize large-scale deep learning models using frameworks like PyTorch, leveraging distributed training (e.g., PyTorch Distributed, DeepSpeed, FSDP) and hardware acceleration, with a focus on retrieval and ranking models\n\nConduct advanced research in representation learning, including contrastive learning, multilingual, and multimodal modeling for search and retrieval\n\nDeploy models - from boosting algorithms to LLMs - in a scalable and performant way\n\nBuild and optimize RAG pipelines for grounding and answer generation\n\nCollaborate with Data, AI, Infrastructure, and Product teams to ensure fast and high-quality delivery\n\nQualifications\nDeep understanding of search and retrieval systems, including quality evaluation principles and metrics\n\nProven track record with large-scale search or recommender systems\n\nStrong proficiency with PyTorch, including experience in distributed training techniques and performance optimization for large models\n\nExpertise in representation learning, including contrastive learning and embedding space alignment for multilingual and multimodal applications\n\nStrong publication record in AI/ML conferences or workshops (e.g., NeurIPS, ICML, ICLR, ACL, CVPR, SIGIR)\n\nSelf-driven, with a strong sense of ownership and execution\n\nMinimum of 3 years (preferably 5+) working on search, recommender systems, or closely related research areas","description_format":"text","description_chars":1771,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["LLM & Generative AI","Search Engines","AI Search"],"lifecycle":[{"event":"open","at":"2026-09-23T10:34:19Z"}],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":52,"reasons":["conf:1","win:early","comp:brand"],"computed_at":"2026-09-23T17:02:56Z"},"pay":null,"html_url":"https://alion.io/job/perplexity-ai-member-of-technical-staff-machine-learning-research-engineer","json_url":"https://alion.io/job/perplexity-ai-member-of-technical-staff-machine-learning-research-engineer.json","meta":{"generated_at":"2026-09-23T17:02:56Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}