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Innopeaktech

Senior Backend Engineer - Recommendation Systems (Contractor)

  • Seen live on Innopeaktech's site 3 days ago
  • Senior
Pay
$60 to $120 an hour USD
Location
Palo Alto, California, United States
Open for
11+ days
First seen
Oct 24, 2026
Apply on Innopeaktech's site (opens in a new tab)

Posting record

No flags

Open 11+ days

The posting's record, oldest first
  1. Innopeaktech's site dates the posting
  2. Ghostless first sees this listing
  3. Last checked: still up
How we know

It hasn't been reposted, listed twice, or left up unusually long, and the posting doesn't say it's a talent pool.

Ghostless records the day it first sees a posting, so a repost can't reset its age. This one was already up when Ghostless started tracking Innopeaktech, so its true age is longer.

Last checked Nov 1, 2026.

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What the posting discloses

Pay
$60 to $120 an hour USD
The US base salary range for this contractor position is 60-120/hour. (quoted from the posting)

Not stated: Real vacancy, AI screening.

Why these three

Ontario requires postings from employers with 25 or more staff to state the pay, whether the vacancy exists, and whether AI screens applicants.

Skills mentioned

About the role

Join OPPO US Research Center’s core team to develop and optimize backend services for high-traffic products (App Store, Global Search, Game Center). You’ll build scalable, reliable systems that serve millions of daily users.

Key Responsibilities

  • Design and implement backend services for recommendation and search with a focus on low latency and high availability.
  • Implement multi-level caching and optimize data access patterns.
  • Build, monitor and tune data pipelines and indices using Redis, Elasticsearch, and Kafka.
  • Develop production-quality Java services using Spring / Spring Boot and collaborate on deployments and incident response.
  • Work cross-functionally with MLE, product, SRE, and data teams to deliver features and improvements.

Requirements

Minimum Qualifications

  • BS or MS in Computer Science or a related field.
  • 4+ years building backend systems in Java (Spring / Spring Boot).
  • Solid knowledge of multithreading, caching strategies, and distributed systems.
  • Hands-on with Redis, Elasticsearch, and Kafka.
  • Good communication, problem solving and teamwork skills.

Preferred Qualifications

  • Experience in recommender or search system backends.
  • Experience operating high-traffic, high-concurrency services.

Benefits

OPPO is proud to be an equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements.

The US base salary range for this contractor position is 60-120/hour. Our salary ranges are determined by role, level, and location.

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