Member of Technical Staff, Envoy Response

San Francisco · 7+ years experience · Full-time · Onsite · Posted Oct 17, 2026

At a glance

As a Senior Fullstack Engineer on the Response team, you'll work on some of Envoy's most technically challenging and impactful products.
You'll help build and scale our Threat Intelligence platform, which processes large volumes of real-time signals from thousands of sources and uses AI to identify and enrich relevant threats.
This is a backend-focused fullstack role where you will spend much of your time designing scalable services, building distributed systems, and owning customer-facing experiences using React.

Build and scale real-time threat intelligence systems that ingest, process, classify, and enrich signals from numerous data sources to surface actionable threats to organizations.
Solve challenging distributed systems problems, including high-throughput event processing, data deduplication, and reliable asynchronous workflows.
Apply AI to real-world engineering problems, building intelligent workflows that help identify relevant threats, reduce noise, and deliver actionable insights.
Build and evolve emergency notification systems that deliver critical communications reliably and at scale across channels such as SMS, email, mobile push, and Slack.
Design, build, and operate scalable backend services, APIs, and data models using technologies such as Kotlin, Kafka, Postgres, AWS, and OpenSearch.
Build intuitive, performant customer-facing experiences using React and TypeScript, taking ownership of features across the full stack.
Drive technical design and architecture decisions, balancing scalability, reliability, performance, and engineering simplicity.
Own features and systems end-to-end, from technical design and implementation to production operations, monitoring, and continuous improvement.
Partner closely with Product, Design, and other Engineering teams to translate complex customer problems into simple, effective solutions.
Raise the engineering bar through thoughtful code reviews, technical mentorship, and improvements to engineering practices.

A BS or MS in Computer Science or a related technical field
7+ years of experience building and operating production software, with strong backend engineering expertise and experience working across the full stack.
Strong programming fundamentals and experience building backend services using languages such as Kotlin, or Java.
Experience designing scalable distributed systems, microservices, and APIs, with a solid understanding of system architecture and engineering tradeoffs.
Experience with relational databases such as Postgres, including data modeling, query optimization, and performance considerations.
Experience with asynchronous processing, event-driven architectures, or messaging systems such as Kafka.
Working proficiency with React, JavaScript/TypeScript, HTML, and CSS, and the ability to independently build and ship frontend features.
A strong product mindset and the ability to balance technical excellence with delivering meaningful customer value.
Experience driving technical projects independently, navigating ambiguity, and collaborating across Engineering, Product, and Design.

Experience building AI-powered applications or integrating LLMs into production systems.
Experience with high-throughput data pipelines, stream processing, or search technologies such as OpenSearch.
Experience with geospatial data, real-time alerting, or mission-critical communication systems.

This on-site position requires 4 days a week (Monday through Thursday) in our San Francisco HQ office.