Weekday (YC W21)

Principal Engineer

Weekday (YC W21)  •  United States (Remote)  •  3 months ago
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Job Description

This role is for one of the Weekday's clients

Salary range: Rs 15000000 - Rs 26000000 (ie INR 150-260 LPA)

Min Experience: 8 years

Location: United States

JobType: full-time

We are seeking a Principal Engineer to architect and build large-scale, real-time data systems that power a modern security platform. This is a high-impact, high-ownership role where you will lead core architectural decisions, design distributed streaming infrastructure from the ground up, and shape long-term technical strategy.

You will operate at the intersection of real-time data processing, distributed systems, and security intelligence—solving complex engineering problems at scale. This opportunity is ideal for someone who thrives in ambiguity, takes end-to-end ownership, and has experience building scalable systems in security or related domains.

Requirements

Key Responsibilities

  • Architect and develop large-scale real-time data processing systems using Apache Flink
  • Design highly reliable, low-latency distributed systems capable of handling high-throughput workloads
  • Write production-grade code in Java and/or Rust
  • Lead system design discussions and define engineering standards and best practices
  • Own scalability, performance optimization, reliability, and observability across services
  • Mentor engineers and elevate the technical quality of the team
  • Collaborate closely with product and security stakeholders to translate requirements into resilient technical solutions
  • Drive long-term architectural decisions and contribute to technical roadmap planning

Core Requirements

  • 8+ years of experience building backend or distributed systems
  • Strong hands-on expertise with Apache Flink
  • Advanced programming skills in Java
  • Production experience with Rust
  • Deep understanding of distributed systems, streaming architectures, and real-time data pipelines
  • Experience building high-throughput, low-latency systems
  • Strong foundations in system design, concurrency, and performance optimization

Preferred Qualifications

  • Experience in cybersecurity, threat detection, observability, or data security domains
  • Background in processing high-volume event streams (logs, telemetry, network data)
  • Familiarity with Kafka, stateful stream processing, and real-time analytics
  • Experience in high-growth or early-stage startup environments
  • Proven track record of building systems from 0 → 1 or significantly scaling existing platforms

What Makes This Role Compelling

  • High ownership over foundational architectural decisions
  • Opportunity to build and scale mission-critical infrastructure
  • Work on complex, real-world security challenges
  • Collaborate within a small, high-caliber engineering team
  • Direct influence on product direction and long-term technology strategy
Weekday (YC W21)

About Weekday (YC W21)

AI recruiter that runs outbound sourcing campaigns to find top talent. At Weekday, we have built the most accurate database of talent (250mn+ people in US & India with contact data), we run outbound campaigns to identify top talent for any role you might be hiring for. We generate the highest response rates (30-40%) on our campaigns making sourcing talent as easy as making a job posting. We are backed by Y-Combinator and were also ranked #1 on Product Hunt.

Industry
Consulting & Advisory
Company Size
51-200 employees
Headquarters
San Fransisco, CA
Year Founded
2021
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