About the role

About Flow

Flow is Harmonic’s next generation AI-native workflow tool; the central operating hub for venture capital, collapsing multiple traditional software categories into one platform for sourcing, researching and triaging investment opportunities.

Flow turns Harmonic into a system of record and context - enabling customers to sync their internal network and business data and combine it with Harmonic’s knowledge graph of tens of millions of companies and hundreds of millions of people, each enriched with 400+ dimensions. This enables context-aware, actionable workflows and insights (agentic and otherwise) - at scale.

While Flow has strong initial traction from users, it is still in its early days - you will be key in releasing and marketing the product widely, and scaling up the user base.

To learn more about the team:

Explore Working with Sang and Working with Miguel
Check out your teammates Apoorva Gupta, Ali Hashemi, Samrat Luintel and Kenny Xu
Explore the Team Page. We’re a mix of ex-founders and seasoned engineers from top engineering institutions like Google, LinkedIn, Microsoft and Meta.

The role

Build and ship the iOS app from scratch: Own the end-to-end development of Harmonic’s first iOS app from project setup and architecture, to shipping the initial product experience. You’ll turn ideas into polished production ready features quickly
Create exceptional product experiences: You’ll partner directly with Product and Design leads to craft world-class interactive experiences, leaning into AI-native chat UX and setting the quality standard for Harmonic’s mobile interactions. Your work will define what “great” feels like in a native iOS app
Drive technical decisions & mentor future hires: You will be the founding iOS engineer. Set the bar and help us shape how mobile operates at Harmonic long-term
Create scalable abstractions and foundations: Set up testing strategies, CI/CD pipelines, modular architecture, reusable components and patterns that enable a future mobile team to move fast without breaking things

X5 Labs is a stealth-mode AI startup building a work model for regulated enterprises. The company develops an ambient discovery platform that observes everything an employee does on their computer — watching screen activity, mouse movements, and keyboard inputs — then augments and enhances their workflows using custom AI models deployed end-to-end within the customer's environment.

Founded by repeat entrepreneurs with deep roots in Israeli Defense Force intelligence and AI research, X5 Labs is on its second venture together. The company focuses on large regulated enterprises, primarily in finance — serving top-tier banks and financial institutions with production-grade, self-hosted AI solutions.

X5 Labs operates as an applied research lab with an execution-first mindset. The team has academic AI backgrounds but prioritizes shipping production systems, deploying custom models, and delivering real customer value over publishing papers. The company buys its own GPUs rather than renting, self-hosts models, and maintains full control of its AI infrastructure stack.

Backed by Insight Partners and other top-tier investors with tens of millions in funding, X5 Labs is rapidly scaling — currently around 25 people with plans to grow to approximately 70 by end of year. The company has already closed seven-figure deals with top-5 US banks and is deploying its platform across multiple enterprise customers.

Founding iOS Engineer

About the role

About X5 Labs

Required skills

Other roles at X5 Labs

Job details

Company

Funding

Founders

What happens next.

Confirm the fit

I pitch you to the company

A meeting lands on your calendar