---
title: "Member of Technical Staff (Machine Learning Engineer, Ranking Quality - Search)"
company: "Perplexity"
company_url: "https://www.remjobs.works/companies/perplexity"
url: "https://www.remjobs.works/job/perplexity-member-of-technical-staff-machine-learning-engineer-ranking-3950b30d-365e-4765-b0ab-ad6ef2786069"
apply_url: "https://jobs.ashbyhq.com/perplexity/19d8bcfd-e493-4b3a-b8fd-11a2a6502da2"
workplace: onsite
location: "Belgrade"
employment_type: full-time
seniority: staff
role: ai-machine-learning
region: europe
skills: ["llm"]
date_posted: 2026-08-12T11:36:20.792Z
first_seen_by_remjobs: 2026-08-26T15:14:51.821Z
---

# Member of Technical Staff (Machine Learning Engineer, Ranking Quality - Search)

**Perplexity** — Belgrade

Apply: https://jobs.ashbyhq.com/perplexity/19d8bcfd-e493-4b3a-b8fd-11a2a6502da2

## About Perplexity

Perplexity LLC is an Executive Coaching firm for SME

## About the role

Perplexity is seeking an experienced Machine Learning Engineer to improve search quality across the middle and later stages of ranking. We are looking for a strong ranking generalist who can own ambiguous problems end to end and brings exceptional depth in either neural ranking or production ranking systems.

**Responsibilities**

- Relentlessly push search quality forward through models, data, evaluation, infrastructure, or any other leverage available.

- Own ranking-quality problems end to end: define the evaluation, identify the bottleneck, build the solution, and ship it safely.

- Train and evaluate retrieval, ranking, and classification models, including neural and LLM-based approaches where appropriate.

- Build and operate ranking infrastructure, including feature computation, low-latency inference, multi-stage cascades, deployment, and monitoring.

- Make sound trade-offs across quality, latency, reliability, cost, and engineering complexity.

- Collaborate across Data, AI, Infrastructure, and Product while retaining ownership of the final quality outcome.**Qualifications**

- Deep understanding of search or recommender systems and their evaluation.

- Proven ownership of a large-scale production ranking system or a substantial class of quality problems.

- Strong machine-learning and software-engineering skills across data, models, serving, and monitoring.

- Ability to drive ambiguous, cross-team problems without continuous task decomposition.

- Exceptional depth in either modern neural ranking methods or low-latency ranking systems and runtime.

- Minimum 5 years of relevant industry experience.

---

Source: Perplexity's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/perplexity-member-of-technical-staff-machine-learning-engineer-ranking-3950b30d-365e-4765-b0ab-ad6ef2786069