Parser/Compiler Research Engineer
US$160,000 – US$210,000 / yr base salary
Posted 2 Sep 2026
Advertised as “Staff Parser/Compiler Research Engineer”
BranchFactor Summary
The original posting with the fluff stripped out
- Management level
- Individual contributor
- Employment
- Remote
- Contract
- Full-time
| Base salary | US$160,000 – US$210,000 / yr |
|---|
.txt builds structured generation: we make language models produce output that follows a given format, by deciding at every decoding step which tokens are allowed. We compile a JSON Schema, a regex, a grammar, a list of function definitions or a policy into that decision, fast enough to run inside the decoding loop. This is how .txt builds reliable and safe agents. We're looking for a developer to work on the parsers and compilers at the center of it.
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Responsibilities**
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Design and Develop: Craft high-performance parsers and data structures that integrate with LLMs.
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Problem Solving: Research advanced parser and compiler technology and symbolic methods.
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Writing Quality Code: Ensure the reliability and efficiency of our methods through rigorous testing and optimization.
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Stay Ahead: Learn the latest, relevant LLM advancements.
Qualifications
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You know Python at a professional level and have practical experience with "lower-level" languages (e.g. C/C++, Rust)
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You have worked directly with parsers (e.g. Earley, LALR(1)), formal grammars, finite-state machines, and implemented efficient data structures. You are also capable of doing research and development in those areas.
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You are familiar with our relevant technical report and open-source project.
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You value simplicity, testing, and automation, and you can demonstrate this.
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You communicate clearly, concisely, and consistently in written form.
Why you should join us:
🧭 The problem matters
Every agent that takes real actions needs a layer that guarantees it can only do what it was asked. The parser and compiler work in this role is what enables this guarantee.
🌐 Remote first
Work from anywhere in the world. We communicate mostly in writing and favor occasional organic discussions over recurring large team meetings.
💸 Competitive compensation and benefits
Market-rate salary plus stock options, health and dental insurance, and a 401(k) for US employees. We'll also get you a GPU if you don't have one.
Location
.txt is a fully remote company with the majority of the team in the US and EU.
For this role, you must be based in the US.
Applying
Please provide a 1-page resume in English.
Only apply to one position at a time.