Senior Software Engineer

HeyMilo AI; United States; On-site; USD 100,000 - 130,000; Full time

Job summary

A cutting-edge AI technology company is seeking a full-stack engineer to work on real-time AI systems designed for interviews. The ideal candidate will have 3-5 years of software engineering experience, be fluent in ReactJS and MongoDB, and demonstrate a strong commitment to the company's vision. This full-time role involves building infrastructure to support thousands of interviews and involves low-latency communication. This position is best for those seeking innovative challenges rather than a strict 9-5 job.

Qualifications

• 3-5+ years of professional software engineering experience.
• Ability to ship end-to-end and operate systems in production.
• Deep belief in what we're building.

Responsibilities

• Building real-time AI interview systems (voice + video, low latency).
• Designing and scaling infrastructure for thousands of concurrent interview sessions.
• Developing backend APIs and workflow orchestration.

Skills

Software engineering

Full stack development

Systems thinking

Machine Learning fundamentals

High ownership

Tools

ReactJS

NextJS

MongoDB

ClickHouse

LiveKit

Job description

HeyMilo is a platform that helps recruiters deploy multimodal AI agents to interview and evaluate candidates at scale.

This role is for an exceptional full-stack engineer who wants to work on frontier AI technology including real-time communication, low-latency pipelines, orchestration, and production infrastructure that supports interviews happening across the world.

If you want a very predictable roadmap and narrow responsibilities, this role is not for you.

If you want to build real-time AI systems that feel human, keep reading.

What you'll work on

• Building real-time AI interview systems (voice + video, low latency)


• Designing and scaling infrastructure for thousands of concurrent interview sessions


• Developing backend APIs and workflow orchestration (FastAPI, Temporal)


• Shipping full stack product features used by employers and candidates every day


• Building queue-driven systems for job execution, retries, and automation (SQS)


• Working on retrieval systems and prompt-driven agent workflows (VectorDBs, MCP)


• Improving reliability, performance, and observability across production systems


• Supporting enterprise integrations, data pipelines, and security patterns

What we're looking for

• Use Cursor/Devin to write a good chunk of your code.


• 3–5+ years of professional software engineering experience


• Full stack engineer who can ship end-to-end and operate systems in production


• Strong systems thinking and engineering fundamentals


• Basic understanding of prompt writing + ML fundamentals


• High ownership, high accountability, low ego


• Deep belief in what we're building

Tech you should be comfortable with

• Frontend: ReactJS, NextJS, ShadCN


• Databases & analytics: MongoDB, ClickHouse, InfluxDB


• Retrieval: VectorDBs, RAG-style systems


• Real-time: LiveKit, Pipecat, low-latency audio/video pipelines

This role is not for you if

• You want a strict 9–5 job


• You prefer narrow scopes and fixed task lists


• You want safety over upside

Seniority level

Mid-Senior level

Employment type

Full-time

Job function

Engineering and Information Technology

Industries: Software Development