Software Engineer I — Build AI-Driven Security Tools

RunSybil

New York (NY)

Hybrid

USD 135,000 - 165,000

Full time

14 days+

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Benefits offered by this job

Equity

Hybrid work model

Stock options

Job summary

RunSybil in NYC (Hybrid) is seeking a Software Engineer I who wants to ship customer-facing features from day one. You will help build the agentic systems powering Sybil using Python, TypeScript, and React, and work closely with senior engineers and founders in a small team where code goes to production.

If you have side projects or open source contributions and want ownership and fast feedback, this is for you.

Qualifications

Must have strong Python fundamentals.
Experience shipping software in any setting.
Initiative and ownership.
Experience with LLMs is a plus.

Responsibilities

Ship customer-facing features end to end, from first commit through production, with close review and support from senior engineers.
Build and extend the agentic systems behind Sybil, working primarily in Python with TypeScript and React across the stack.
Use LLMs as a core part of how you work: prompting, evaluating generated code, and building tooling that makes the whole team faster.
Own small projects yourself, including scoping the problem, proposing the approach, and seeing it through to done.
Debug real issues in a production system that customers rely on, and learn how long-running agentic workloads behave in the wild.
Contribute to technical design discussions and code reviews, and speak up when you see a better way.
Learn offensive security on the job from a team that includes some of the best in the field.