Runtime Engineer — Build a Production Language Runtime

Winixx Inc.; Dallas (TX); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Visa sponsorship

Paid time off

Professional development

Opportunity to contribute to language

Job summary

Winixx Inc. is seeking a Runtime Engineer to implement and test components of the .wnx ARC runtime, supporting interop with Kotlin/Java AOSP APIs across the device lineup.

You will work on memory management concepts such as reference counting and garbage collection, and contribute to performance profiling and runtime documentation.

This full-time role offers visa sponsorship for qualified candidates and a chance to help design a new programming language from scratch.

Qualifications

• 3+ years of systems or runtime engineering experience.
• Familiarity with reference counting, garbage collection, or memory management concepts.
• Exposure to JVM or Android runtime internals is a strong plus.

Responsibilities

• Implement and test ARC runtime components.
• Support Kotlin/Java interop bridge development and testing.
• Assist with performance profiling across device classes.
• Fix runtime bugs and edge cases identified through internal use.
• Contribute to runtime documentation.

Skills

Runtime engineering

Memory management concepts

Kotlin/Java interop

BSc Computer Science

Education

Bachelor's degree in Computer Science

Job description

About Winixx

Winixx Inc. is a New York-based technology holding company operating a portfolio of over 35 SaaS platforms across freight, fleet management, financial infrastructure, and market intelligence. We are building WinixxOS — a distinctive, AOSP-based operating system powering a full lineup of consumer hardware — and, over a multi-year horizon, .wnx, a proprietary programming language designed to be announced alongside WinixxOS. This is founding-team language engineering: you would be shaping the core type system, memory model, and syntax of a new language from its very first version, not extending someone else's spec.

Role Summary

The Runtime Engineer implements and tests components of the .wnx ARC runtime, supporting interop with existing Kotlin/Java AOSP APIs and performance work across the device lineup.

What You'll Do

• Implement and test ARC runtime components
• Support Kotlin/Java interop bridge development and testing
• Assist with performance profiling across device classes
• Fix runtime bugs and edge cases identified through internal use
• Contribute to runtime documentation

What We're Looking For

• 3+ years of systems or runtime engineering experience
• Familiarity with reference counting, garbage collection, or similar memory management concepts
• Exposure to JVM or Android runtime internals is a strong plus
• Bachelor's degree in Computer Science or equivalent experience

• Competitive base salary commensurate with experience
• Performance bonus program tied to individual and company milestones
• Visa sponsorship available for the right talent
• Full-time role with a minimum one-year commitment
• A rare opportunity to help design and build a production programming language from scratch
• Collaborative, mission-driven team environment
• Paid time off and company holidays
• Professional development and continuing education support

Winixx Inc. is an equal opportunity employer. We evaluate all applicants on the basis of qualifications, experience, and demonstrated ability without regard to race, color, religion, sex, national origin, disability, veteran status, or any other characteristic protected by applicable law.

This is a full-time position with a minimum one-year commitment, on a multi-year (5-year horizon) language development effort. Visa sponsorship is available for candidates with the right qualifications and experience.

The compensation range reflected in this posting represents the minimum and maximum target range for this position. Individual pay within the posted range is determined by a candidate's demonstrated experience, educational background, skill set, and geographic location. Final compensation is established at the time of offer and may fall anywhere within the stated range based on these factors.

Compensation ranges reflect national US market data and are subject to change. Additional forms of compensation may include performance bonuses, equity participation, and other benefits as outlined in your offer documentation.