Senior Product Engineer

Praxis, Inc.; San Francisco (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

Kato is hiring a Senior Product Engineer in San Francisco, 4 days a week in person. You will shape the technical foundation, own critical projects, and drive onboarding and enhancements for our voice agent framework. You’ll work across the stack from real-time processing to dashboards, scaling infrastructure, and product expansion.

CTO reports directly, equity ownership included. The role emphasizes architectural leadership, customer collaboration, and building high-impact, compliant fintech

Qualifications

• BS in Computer Science or related field required.
• 2–5 years of production software engineering experience.
• Strong API design background and architectural thinking.
• Experience with cloud infrastructure (AWS/GCP).
• Excellent problem-solving, communication and ownership mindset.
• Lives and breathes product and code quality.

Responsibilities

• Lead architecture and implementation of real-time systems.
• Design scalable, fault-tolerant distributed services.
• Optimize LLM integration for compliant conversations.
• Build internal tooling for monitoring and improvement.
• Develop customer-facing dashboards and reporting.
• Collaborate with customers to translate requirements into solutions.
• Set engineering standards and drive technical decisions.

Skills

API design

Problem-solving

Architectural thinking

Communication

Ownership mindset

Product and code quality

Learning drive

Education

Bachelor's degree in Computer Science or related field

Tools

Golang

TypeScript

React

PostgreSQL

AWS

GCP

Terraform

Kubernetes

Job description

Senior Product Engineer @ Kato

About the Job

Position: Senior Product Engineer (Full-Time)

Reporting to: CTO

Location: San Francisco (4 days/week in person)

Company Overview

Lenders spend over $24B every year hiring agents to perform manual, repetitive servicing work. Existing AI solutions try to automate this, but they treat regulatory guardrails as an afterthought - meaning they can’t guarantee compliance and can’t be trusted with critical servicing workflows.

Kato takes a different approach.

Regulations aren’t an afterthought - they’re the foundation. We start with a regulatory rules system and layer an AI decision engine on top of it. With this architecture, we’re building an AI-powered servicing platform that automates critical workflows across every channel with full compliance and best-in-class recoveries. Human teams are then free to focus only on the judgment-driven work that truly needs them.

We are starting today with a compliance first Voice AI agent that handles outbound and inbound loan servicing calls, and are already in production with major names in the fintech lending space like Bilt Rewards and Parafin.

Kato is founded by a team with deep operating expertise in financial services and software engineering:

• Pratik Risbud (CEO/Co-Founder): Former Investment Banker at Goldman Sachs and led Credit/Operations at Brex
• David Zhu (CTO/Co-Founder): Former Software Engineer at Google and Engineering Manager at Brex

Kato is backed by institutional capital from Pear VC and angel investors from top tech companies such as Brex, Bridge, and Square. We are looking for top talent to join our team and power our growth.

The Role

We're seeking a driven, high-impact Senior Product Engineer to work directly with customers to build impactful new products and improvements. As our second engineering hire, you'll have an unparalleled opportunity to shape our technical foundation and future.

You’ll own mission-critical projects driving company success, initially focusing on onboarding new customers and augmenting our voice agent framework as new customer needs arise. The role spans our entire technical stack - from real-time voice processing to customer-facing dashboards, infrastructure scaling, and product expansion. There will be significant opportunities to define product direction, build out engineering best practices and technical standards, and rapidly grow your scope and career.

Reporting directly to the CTO, this full-time role includes significant equity ownership.

Key Responsibilities

• Lead architecture and implementation of our real-time voice processing system
• Design and build scalable, fault-tolerant distributed systems
• Optimize LLM integration for natural, compliance-aware conversations
• Develop internal tools for voice agent monitoring and improvement
• Build customer-facing dashboards and reporting systems
• Partner with customers to translate requirements into technical solutions
• Establish engineering best practices and technical standards
• Drive technical decisions that shape product direction

Requirements

Must Have:

• Bachelor's degree in Computer Science or related field
• 2-5 years of production software engineering experience
• Strong background in API design
• Experience with cloud infrastructure (AWS/GCP)
• Excellent problem-solving and architectural thinking
• Strong communication and organizational skills
• "Owner's mindset" with bias for action
• Lives and breathes product and code quality
• Endless curiosity and learning drive

Nice to Have:

• Experience with real-time audio processing or WebRTC
• Background in Golang, TypeScript, or React
• Experience with LLM integration and prompt engineering
• DevOps and infrastructure automation experience
• Fintech or financial systems background

Tech Stack

• Backend: Golang, PostgreSQL,
• Frontend: Next.js, TypeScript, React, TailwindCSS
• Infrastructure: AWS, Terraform, Kubernetes, Docker
• AI/ML: Large Language Models, Speech To Text, Text To Speech
• DevOps: GitHub Actions, Datadog

Why Join Us

• Work with experienced founders who've built and scaled financial products for 9+ years
• Work with a CTO with experience in all stages of engineering maturity from 0 to 1, mid-stage startups, all the way to large enterprise companies
• Build something meaningful - this won’t be a 9-to-5. It will be intense, rewarding, and career-defining. You will own core customer relationships and parts of the technical stack from day one.
• Shape the technical foundation of a product revolutionizing a $24BN market
• Get unmatched career acceleration: you’ll be working directly with customers getting direct feedback and direction from customer needs.
• Direct impact on product strategy and company direction
• Work with cutting-edge technologies in AI, voice processing, and cloud infrastructure
• Define engineering culture and practices from the ground up