Senior Software Engineer - Search Application (Agentic Search)

Nebius
Israel
On-site

Who this role is best for

Aimed at senior software engineers with distributed systems experience who are comfortable with high-scale, latency-sensitive architectures and collaborative innovation.

Best fit for

  • Senior engineers with strong Go/Python skills and a background in distributed systems at scale
    — “Strong Go and Python Experience”
  • Candidates who have operated production systems and debugged distributed environments
    — “Experience operating production systems and debugging failures in distributed environments”
  • Individuals interested in technical leadership or ownership of core AI infrastructure systems
    — “Are interested in either a strong senior IC role or a role with significant technical leadership and ownership.”

Things to consider

  • Work authorization is a mandatory requirement for applicants in the country they apply to
    — “Applicants must be authorized to work in the country in which they apply”

How to stand out

  • Highlight experience with high-throughput pipelines and latency optimization in your resume and interviews
    — “Experience with large-scale distributed systems (5k+ RPS, billions of events, high-throughput pipelines)”
  • Emphasize your ability to define and implement observability primitives in system design discussions
    — “Define and implement observability primitives, including structured logs, metrics, traces, and quality signals”
  • Showcase your track record of integrating ML improvements while maintaining system decoupling
    — “Collaborate closely with ML engineers to integrate search quality improvements to the system, while keeping ML logic decoupled from core system internals”
  • Demonstrate your ability to translate business goals into measurable backend metrics
    — “Work with data analysts and product managers to translate product and quality goals into concrete backend behavior and measurable metrics”
  • Demonstrate your experience with feature flags and controlled rollouts for system iteration
    — “Support experimentation and iteration by enabling feature flags, controlled rollouts, and online experiments”
Pace · Fast PacedCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • Designed and implemented backend components
  • Operated high-scale API
Typical background
5+ years of backend development experience

Skills & requirements

Required

GoPythonDistributed SystemsInformation Retrieval

Preferred

Machine LearningCloud Infrastructure

Stack & domain

GoPythonLarge-scale Distributed SystemsInformation Retrieval Flows And PipelinesProduction SystemsDebugging Failures In Distributed EnvironmentsScalabilityFault ToleranceResource ManagementAICloud Infrastructure

About the role

Original posting from Nebius

About Nebius:

Nebius is leading a new era in cloud infrastructure for the global AI economy. We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure.

Built by engineers, for engineers. From large-scale GPU orchestration to inference optimization, we own the hard problems across compute, storage, networking and applied AI.

Listed on Nasdaq (NBIS) and headquartered in Amsterdam, we have a global footprint with R&D hubs across Europe, the UK, North America and Israel. Our team of 1,500+ includes hundreds of engineers with deep expertise across hardware, software and AI R&D.

We are looking for a Senior Software Engineer to work on the core search application powering our agentic search platform.

In this role, you will build and operate a high-scale, latency-sensitive API that sits at the center of the search request flow. The system orchestrates multiple retrieval capabilities, ranking components, and downstream services to serve thousands of search requests per second while balancing search quality, latency, reliability, and infrastructure cost.

In this position, your responsibility will be to

Design, implement, and operate core backend components of a search orchestration system, spanning online services and background data pipelines.

Build well-tested services and pipelines with clear responsibilities and interaction contracts, while remaining flexible as the system evolves

Define and implement observability primitives, including structured logs, metrics, traces, and quality signals for both online and offline components

Support experimentation and iteration by enabling feature flags, controlled rollouts, and online experiments

Track throughput, latency, and resource usage across the system, and improve performance or cost efficiency when business needs require it

Collaborate closely with ML engineers to integrate search quality improvements to the system, while keeping ML logic decoupled from core system internals

Monitor resource usage, bandwidth consumption, and infrastructure cost

Work with data analysts and product managers to translate product and quality goals into concrete backend behavior and measurable metrics

You may be a good fit if you:

5+ years of experience building product critical backend services

Strong Go and Python Experience

Experience with large-scale distributed systems (5k+ RPS, billions of events, high-throughput pipelines)

Understanding of Information Retrieval flows and pipelines

Experience operating production systems and debugging failures in distributed environments

Strong understanding of scalability, fault tolerance, and resource management

Are interested in either a strong senior IC role or a role with significant technical leadership and ownership.

Benefits & Perks:

Competitive compensation

Career growth and learning opportunities

Flexibility and ownership

Collaborative and innovative culture

Opportunity to work on impactful AI projects

International environment and talented teams

What's it like to work at Nebius:

Fast moving - Bold thinking - Constant growth - Meaningful impact - Trust and real ownership - Opportunity to shape the future of AI 

Equal Opportunity Statement:

Nebius is an equal opportunity employer. We are committed to fostering an inclusive and diverse workplace and to providing equal employment opportunities in all aspects of employment. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), national origin, ancestry, age, disability, genetic information, marital status, veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by applicable law.

Applicants must be authorized to work in the country in which they apply and will be required to provide proof of employment eligibility as a condition of hire. 

If you need accommodations during the application process, please let us know.

Source: Nebius careers

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