Staff Backend Engineer, OpenPhone

Artificial Intelligence

$188-234k

Actual salary range is dependent on location. Canada salary range is $215,000 - $237,000 CAD. Offers equity

React

MongoDB

AWS

Kubernetes

TypeScript

Redis

iOS

Android

Postgres

Figma

RabbitMQ

Slack

Notion

Datadog

Expert level

Remote from Canada, US

All-in-one phone system for teams

Open for applications

All-in-one phone system for teams

101-200 employees

B2BInternal toolsSaaSTelecommunications

Open for applications

$188-234k

Actual salary range is dependent on location. Canada salary range is $215,000 - $237,000 CAD. Offers equity

React

MongoDB

AWS

Kubernetes

TypeScript

Redis

iOS

Android

Postgres

Figma

RabbitMQ

Slack

Notion

Datadog

Expert level

Remote from Canada, US

101-200 employees

B2BInternal toolsSaaSTelecommunications

Company mission

To help people communicate better and be more productive, and improve the way millions of businesses communicate.

Job

Company

Role

Who you are

10+ years of backend or platform engineering experience, including LLM-driven systems in production
Proven success leading architecture for business-critical services, balancing innovation with operational pragmatism
Deep knowledge of LLM integration patterns, prompt design, vector search, and agent frameworks
Expertise in event-driven and streaming architectures; you can reason about concurrency, ordering, and back-pressure under load
Track record of driving cost optimization, observability, and incident response for AI workloads
Excellent written and verbal communicator who aligns diverse stakeholders and produces clear, thorough design docs
Collaborative leader who mentors others, fosters psychological safety, and elevates the entire engineering organization
Comfortable with ambiguity, you break down complex problems, make informed trade-offs, and deliver iterative value quickly
Empathetic and customer-focused, you balance technical decisions with user experience and business impact

What the job involves

OpenPhone’s AI capabilities power everything from intelligent call assistants to automated workflows that help thousands of businesses communicate better
As a Staff Backend Engineer, you will own the technical strategy for how we design, build, and operate AI features across the product
You’ll partner closely with leaders across engineering, product, and security to translate ambitious product ideas into scalable, dependable systems
Your architectural choices will shape how every customer experiences AI inside OpenPhone—from the very first trial call to fully deployed agents—and you’ll be trusted to balance cutting-edge innovation with rock-solid reliability
Own the long-term architecture for AI orchestration frameworks, agent-based workflows, and model lifecycle management
Lead cross-functional delivery of AI features from proof of concept to production rollout, coordinating engineering, product, design, and CX
Establish best practices for prompt engineering, evaluation, versioning, observability, and incident response for AI services
Design and optimize low-latency streaming pipelines for speech and other real-time data when the customer experience demands it
Drive continuous cost, performance, reliability, and security improvements for models and infrastructure
Mentor engineers through design reviews, code reviews, and technical coaching, raising the bar for excellence across teams
Partner with security and platform leaders to ensure data privacy, compliance, and operational excellence
Stay current on advances in LLMs, agent architectures, and emerging tooling, translating insights into actionable roadmap proposals
Our backend is built on Node using Typescript
Our AI Infrastructure uses temporal.io, vector DBs, libraries like Langchain and top-tier llm models
We use Kubernetes on AWS to orchestrate our infrastructure setup and deployment
The overall architecture is event-driven microservices with RabbitMQ at the center of it
We use a variety of databases for different purposes: Postgres, Mongo, Elastic, and Redis
We have the following clients - Web (React), Android and iOS
We use Kong as our public API Gateway
Observability Tools: Datadog
Other Tools: Figma, Linear, Notion, and Slack

Our take

Business phones are a vital resource for many companies, but buying a second phone for your team can be an expensive prospect. OpenPhone solves this problem by replacing business phones with an easy-to-access app.

OpenPhone leverages many of the advantages of a traditional business phone, allowing users to maintain work boundaries and privacy, without the need for new, high-cost hardware. By specifically targeting people looking for a business phone number, OpenPhone has attracted freelancers, small companies, contractors, and larger companies ready to modernize their existing phone systems.

Though there are competitors in the space, OpenPhone's unique approach allows it to stand out from the likes of Aircall and Airpad. The company has seen significant funding that it is investing in accelerated growth efforts, hiring, and the further development of its collaboration features and business tool integrations.

Freddie

Company Specialist at Welcome to the Jungle

Insights

Led by a woman

Top investors

25% employee growth in 12 months

Glassdoor (3.9)

Trustpilot (4)

Company

Funding (last 2 of 4 rounds)

Apr 2022

$40m

SERIES B

Nov 2020

$14m

SERIES A

Total funding: $56.2m

Company benefits

Equity
Health benefits
Comprehensive health, dental, and vision plans (covered 100% for you and 60% for your dependents)
$1,000 budget to make your home office more comfortable
Unlimited PTO, sick leave, and parental leave (we also close for all major holidays)
Retirement benefits - we match 100% of the first 2% of your 401(k) contribution
$3,000 per year towards your professional development and education

Company HQ

Potrero Hill, San Francisco, CA

Leadership

Mahyarr Raissi

(Co-Founder & CEO)

Previously worked as a Software Engineer at Tagged, and was a Product Manager at Joist.

Daryna Kulya

(Co-Founder & COO)

Previously worked as Manager of Deloitte's Digital Innovation Lab, and was a Product Manager at Vidyard.

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