---
title: 'Senior/Staff Software Engineer at Sandbar'
canonical: 'https://feeny.ai/job/senior-staff-software-engineer-sandbar-new-york-fjwds9gs8748'
type: 'job'
last_seen: '2026-10-19'
---

# Senior/Staff Software Engineer at Sandbar

- **Company:** Sandbar
- **Location:** New York, NY
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-19
- **Last confirmed live:** 2026-10-19
- **Apply:** https://jobs.ashbyhq.com/sandbar/ab732009-4855-4197-a920-f7216763c469

## Job description

## About Sandbar

Sandbar is an interface company in New York City. We aim to expand human thinking. Our team has built software, ML, hardware, and consumer products across Meta, CTRL-labs, Apple, Peloton, and Equinox. Our first product is Stream, is private voice ring that extends your thinking. Stream has been featured in WSJ, Bloomberg, Wired, and Time's Best Inventions of the Year. Join us in creating technology that extends human thinking.

## About

We’re looking for a strong generalist engineer to connect Stream to the software people already use. Stream is a self extension that listens, remembers, and helps you think through conversation, and the more of your world it can reach, the more useful it becomes. Most software wasn’t built to work with an AI. Making it work means understanding how each application is built, finding the most reliable way in, and making that connection dependable for people who rely on it every day. You’ll own this work end to end, work directly with the founders, ship on the same real-time Python services the rest of Stream runs on, and help shape how others build on Stream.

## Responsibilities

- Build integrations between Stream and the apps, services, and AI tools people already use
- Design how tools plug into Stream’s agent: tool definitions, result shaping, confirmation, and context passing
- Own the integration layer end to end: OAuth and token lifecycle, least-privilege scopes, webhooks, rate limits, retries, and real-world failure modes
- Build and operate MCP servers and clients in production
- Work out reliable integrations for software without clean APIs
- Instrument every integration so breakage is caught before users notice
- Carry a share of the core backend and its on-call rotation

## Qualifications

- 5+ years building software, with strong Python and comfort owning a live, real-time service
- Have shipped third-party integrations in production: OAuth 2/OIDC, token refresh and revocation, webhooks, API versioning, and vendor quirks
- Understand software architecture well enough to work with applications you didn’t write
- Have integrated tools into an LLM agent that real users depend on, and been accountable for actions completing
- Hands-on MCP experience
- Generalist range across backend, auth, client code, and agent logic; can take an open-ended problem to a shipped result without a spec
- Product sense for software that acts on someone’s behalf, including when the user isn’t looking at a screen
- Communicate precisely and make tradeoffs explicit

## Nice to have

- Connector or plugin work at an AI product
- Browser automation (e.g. Playwright, Chrome DevTools Protocol)
- Integration security: scoped credentials, secret storage, prompt-injection defenses, audit logging
- Voice or multimodal assistant experience
- Developer documentation other engineers have built on

FTE Benefits

- Health, vision, and dental benefits
- Company-sponsored 401(k)
- Unlimited PTO and sick time
- Early stage equity

## About Sandbar

## Company Overview
- **One-liner**: Sandbar builds a conversational interface called Stream, a physical wearable ring and AI-powered software layer designed to augment thinking and action by allowing users to interact with technology through natural voice conversation while on the move.
- **Entity Type**: Private (Seed & Series A funded)
- **Headquarters**: New York City, United States
- **Founded**: 2023
- **Founders**: Mina Fahmi (CEO) and Kirak Hong (CTO)

## Core Business
- Primary industry/industries: Human-AI interface, Consumer Electronics, Artificial Intelligence
- Target customers: B2C (early adopters, knowledge workers, creators) and B2B elements (developer platform for AI agents)
- Mission or purpose statement: To augment individuals so they can each think, act, and move more freely. The company believes in building a "more human" interface with technology.

## Products & Services
- **[Stream]**: A physical wearable device (a ring) that, when paired with a mobile app and AI backend, creates an ambient, voice-first conversational interface. It is designed to capture thoughts, orchestrate AI agents, and provide context-aware assistance without needing to look at a screen. The device is currently in pre-order, with Batch 3 available after Batches 1 and 2 sold out. It is described as a "self extension that keeps your thinking moving." The company is also building a developer platform (API/agents) for third-party integrations.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed.
- **Total Funding**: $36M (based on public announcements: $13M Seed round in November 2025, and a $23M Series A in March 2026).
- **Key Metric**: Total funding raised ($36M), with Stream’s first two pre-order batches selling out completely.
- **Notable Investors/Partners**: Adjacent, Kindred Ventures (co-leads of Series A), True Ventures, Upfront Ventures, Betaworks.
- **Growth Signals**: Rapid headcount growth (+172.7% YoY to 16 employees), significant venture capital backing within 2.5 years of founding, and high consumer demand for its product (sold out pre-order batches). The company is actively hiring across 13 open roles, indicating a major scaling phase.

## Competitive Advantages
- **Full-Stack Vertical Integration**: They control the hardware (ring), firmware, Bluetooth, mobile app, backend, AI models, and retrieval layers. This allows them to optimize for latency and fluency in a way that pure software or pure hardware companies cannot.
- **New Design Primitives**: Sandbar is not replicating a screen interface with voice. They are inventing a new UX paradigm for "conversation" that relies on deep memory, context, and asynchronous action, without the need for a visual display.
- **Agent Orchestration Layer**: Stream is designed to be the persistent, always-on layer that knows a user's context, preferences, and day, enabling it to automatically spin up and orchestrate multiple specialized AI agents without the user needing to manage them manually.

## Strategic Focus
- Product delivery and scaling: The immediate priority is shipping Stream to its first customers in Summer 2026 and fulfilling growing pre-order demand.
- Talent acquisition: The company is aggressively hiring across machine learning, software engineering, hardware, product design, and marketing to build a world-class team to scale the product.
- Platform development: Expanding the developer platform and agent ecosystem to make Stream the "layer that sits underneath all of it" for the emerging agentic world.

## Why Work Here
- **Mission-Driven & Cutting-Edge**: The opportunity to work on a genuinely new computing paradigm—a conversational interface that could fundamentally change how people interact with technology in their daily lives.
- **Talent Density & Pedigree**: The team is small (16 people) but composed of engineers and operators from top-tier companies like Meta, Apple, Peloton, and Equinox, offering a high-velocity, high-impact environment.
- **Full-Stack & Multi-Disciplinary**: Engineers and designers work across a wide stack (hardware, firmware, software, ML, AI) on challenging real-time problems.
- **Culture**: The company describes itself as "small," with a focus on speed, iteration, and craft. The founders are active and visible, sharing the company’s technical philosophy publicly.
- **Location & Flexibility**: The company is headquartered in New York City (HQ) with a presence in Germany. While office presence is implied (hardware development), there is a distributed element to the team. Perks or specific policy (remote/hybrid) are not explicitly stated but are likely high-flexibility given the small team and talent profile.

## Sources
1. [sandbar.com](https://www.sandbar.com/about-us)
2. [sandbar.com](https://www.sandbar.com/careers)
3. [sandbar.com](https://www.sandbar.com/technology)
4. [linkedin.com](https://www.linkedin.com/company/sandbarinc)
5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/sandbar)

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