Software Engineer Intern, Rust UX/DX

Sealed Security; United States; On-site; USD 30,000 - 50,000; Part time

Job summary

A dynamic security-focused startup in the United States is seeking an intern for a 3-month paid internship, with the potential for extension or conversion. As part of the team, you will work on a Rust-based AI coding agent, improving the developer experience and contributing real code from day one. Ideal candidates have strong Rust skills, experience with AI coding tools, and possess a deep interest in security and developer tools.

Qualifications

• Experience beyond tutorials in Rust, with personal projects or open source contributions.
• Active user of AI coding tools with strong code review capabilities.
• At least one shipped project that others have used, including internships.

Responsibilities

• Work on developer experience for a Rust-based AI coding agent.
• Contribute real engineering work with a focus on user interaction.
• Collaborate directly with the founder.

Skills

Rust experience

AI-native workflow

Comfort with the terminal

Education

Student or recent grad

Tools

Terminal UI frameworks (ratatui, crossterm, ncurses)

WebAssembly

Job description

Type: Internship (3 months, potential extension or conversion)

Location: Remote (US preferred)

Compensation: Paid, competitive for internship level

Start Date: ASAP

We're building a security-focused AI coding agent using Rust and WebAssembly.

The product has a working MVP and we're looking for an intern who can contribute real code from week one.

This is a pre‑seed venture backed by experienced enterprise software operators, and founded by an ex‑Google software engineer.

Company: Sealed Security

Tasks

You’ll work on the developer experience of a Rust-based AI coding agent — the CLI, the terminal output, the way the agent interacts with users. This is real engineering work on a real product, not a side project or a learning exercise. Your code will ship to users.

You’ll be working in Rust, building terminal UX, and learning about WebAssembly sandboxing and security models. You’ll work directly with the founder.

Requirements

• Rust experience — you’ve written Rust beyond tutorials. Personal projects, coursework, or contributions to open source. Show us your GitHub.
• AI‑native workflow: you actively use AI coding tools (Claude Code, Cursor, etc.) in your daily work and you’re genuinely faster because of them. But you’re also a strong code reviewer and architect. This is security software — every line matters. We want AI‑augmented engineers, not vibe coders.
• Shipped something — at least one project that other people have used. Internships where you shipped code count.
• Comfort with the terminal — you live in the command line, not just visit it.

Preferred

• Previous internship(s) at a software company
• Experience with terminal UI (ratatui, crossterm, ncurses, etc.)
• WebAssembly familiarity
• Interest in security, cryptography, or systems programming

About You

You’re a student or recent grad who builds things. Your GitHub has projects with commit histories that show iteration, not just initial dumps. You’re not a vibe coder, you’re an excellent engineer who has adapted to the AI landscape. You’ve done at least one internship where you wrote code that shipped. You’re excited about Rust, developer tools, and AI — and you want to work at a startup where your work matters immediately.