Full-Stack Engineer (Rust / System Performance)

Full-stack Engineer (Rust / System Performance)

We’re pushing computers beyond their limits

We’re building a platform that removes OS-level bloat and pushes Windows devices beyond their factory performance, extending lifespan, unlocking speed, and reducing global e-waste.

This isn’t another SaaS dashboard.

This is system-level performance engineering — close to the OS, where small changes create massive impact.

Backed by 2.6M+ users through AtlasOS and 5,000+ daily downloads, we’re now turning this into a scalable SaaS platform across consumer and enterprise markets.

• We have distribution.
• We have demand.
• Now we’re building the product that scales it.

About eclean

eclean is a B2C & B2B IT optimization SaaS built to extend device lifespan and eliminate performance loss.

Created by the team behind AtlasOS, we’re solving a real problem at global scale:

slow devices, unnecessary hardware upgrades, and growing e-waste.

By pushing devices to perform better than when they were new, we help consumers, gamers, and enterprises save money while reducing environmental impact.

The role

We’re looking for a Full-stack Engineer who wants to build something technically challenging and meaningful. You’ll work across Rust, Tauri, Svelte, and Go — shaping both the product and how performance is delivered at scale.

You’ll have real ownership:

• Build features end-to-end

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• Solve hard technical problems
• Make decisions that directly impact millions of users

What you’ll work on

• Build and evolve our desktop application using Rust + Tauri
• Develop high-performance UI with Svelte
• Work across the stack with our Go backend
• Identify and eliminate performance bottlenecks at system level
• Improve how software interacts with Windows internals
• Ship fast, iterate, and continuously improve real user experience

Tech stack; Rust · Tauri · Svelte · Go · Windows internals

Who this is for

• Enjoys working close to the OS layer
• Likes solving performance problems, not just building CRUD apps
• Prefers ownership over process
• Comfortable figuring things out independently

This role is not for

• Those who want clearly defined tasks and slow-moving environments
• Those who prefer abstraction over understanding system behavior

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Requirements

• Strong experience with Rust and modern software development
• Experience with Svelte / Go / Tauri is a strong plus
• Excellent problem-solving and debugging skills
• Fluent in English

Nice to have:

• Experience with Windows APIs / system-level development
• Swedish

Why join now

• Proven distribution (millions of users)
• Early-stage product with real traction
• High-impact technical challenges
• Opportunity to shape architecture and product early

This is a rare moment, before scale is fully unlocked, but after product-market demand is proven.

Engagement

• 6-month contractor role with strong potential to convert to full-time
• Fully remote (Sweden preferred but can consider EU based)
• You are comfortable working as an independent contractor

eclean is part of Arctic Business, one of Sweden’s leading startup incubators, supporting high-potential companies with funding, strategic guidance, and access to a strong network of investors and partners. This provides additional backing and significantly increases the likelihood of long-term success and growth.