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Senior Software Engineer

Domu Technology Inc., San Francisco, California

Domu Technology Inc. has this job in 1 other place

San Francisco, California, US

Posted pay

$150K–$210K

a year

Location: San Francisco, California
Work type: Not given
Level: Senior
Experience: 3+ years
Skills in the job text: Python
AWS
TypeScript
Kubernetes
PostgreSQL
ClickHouse
Kafka
Posted: Oct 6, 2025
Last check: 3 h ago
Job type: Software engineering

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Domu Technology Inc.

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What you need

3+ years of experience as a software engineer

Previously worked at a Series A (or similar stage) startup and went through the same hypergrowth challenges Domu is facing

Experience dealing with legacy systems and refactoring them into sustainable, scalable architectures

Strong backend fundamentals – can own features end-to-end from design to production

Proficiency in TypeScript and/or Python

As the Senior Software Engineer you'll..

Build and own core product features: Backend systems, APIs, voice infrastructure, wherever the product needs you. Code ships daily and goes live for Fortune 500 clients.
Work on things most engineers never touch: telephony systems, real-time voice processing, and integrations with legacy financial infrastructure. The problems are hard. That's the point.
95%+ of your time will be coding and building.
We're looking for engineers who can own one of these areas: the orchestration layer that coordinates our voice AI systems, infrastructure scaling and low-level performance, security as a generalist building for Fortune 500 financial institutions, or product engineering close to users finding high-leverage wins.
Know what it feels like when things are working: real customers, real revenue, a product people actually need. You also know the chaos, the pace, the things that break at the worst possible time. You've seen both sides and you want to do it again with a team that's already found traction.

Why Domu

Real traction. Post $XXM in revenue, Fortune 500 customers, 12x YoY growth. This isn't a bet on an idea. The product works and customers are paying for it.
You'll learn how enterprise deals work from an engineering seat. You'll see the direct line between your code and revenue.
AI First company with $1M+ revenue per employee.
Early enough to shape the product, the team, and the culture.

Extras we'd be excited about

Telephony/Voice infrastructure – SIP, SRTP, WebRTC, or platforms like Telnyx, Twilio, LiveKit
High-throughput distributed systems - queue workers, event-driven architectures, handling 1M+ daily transactions
PostgreSQL at scale – query optimization, replication, connection pooling
Kubernetes – production deployments, scaling stateful services
Real-time data pipelines - ClickHouse, Kafka, or similar OLAP/streaming solutions
AWS infrastructure – SQS, containerized deployments
Compliance-conscious environments - SOC 2, ISO 27001, or fintech/enterprise security requirements
Experience with AI/ML integrations in production (LLMs, voice AI)
Familiarity with contact center / dialer systems
You've been through the early stages of a startup before.
You care about the craft. You want to build something good, not just something that works.

Ideal archetypes

Head of Eng / Tech Lead at a Series A/B startup (5–20 engineers), built and scaled core infra from scratch
Senior Engineer who was one of the first 10 hires and is ready for that feeling again
Founding Engineer through Series B/C, owns systems end-to-end, wants a new zero-to-one challenge
Staff Engineer at a Series C/D slowed by process, wants to move fast again
Repeat startup engineer, 2–3 stints, specifically seeks small teams with hard problems

Pay and benefits

Healthcare
weekly stipend for food and transportation
gym membership
equipment budget (strict rules on noisy mechanical keyboards)
whatever tools you need

About Domu Technology Inc.

At Domu.ai, we're building the agentic infrastructure for the future of the world's largest financial institutions. AI agents that handle millions of live interactions every day for Fortune 500 banks and insurers, end-to-end. Interactions are 3x-ing monthly. We're hitting problems most startups never encounter: real-time voice AI at scale, legacy banking infrastructure, enterprise telephony, and building regulatory frameworks in the US.

We do dailies. We groom tickets. But we keep process light and in service of the work, not the other way around. We'd rather spend time building than talking about building.
We care about doing great work. Not just shipping, but shipping something you're proud of.
Ownership here is real. You won't be handed tasks from a backlog. You'll see what needs to happen and do it. That's how a small team ships to Fortune 500 customers.
We hire people whose judgment we trust, then get out of their way. No passengers.

Read the job posting on the Domu Technology Inc. site

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Source: the Y Combinator job board. We last checked this job 3 h ago. We first saw it 5 days ago. A job on a job board does not always mean that the team interviews people now.

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Domu Technology Inc.

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Compared with similar jobs

This base pay is below the median for senior software engineering jobs in the Bay Area.

Median: $213K a year
Other jobs in the group: 1,608

We compare the middle of each posted range. This is base pay as posted. The group does not include this job.