[Hiring] Senior Software Engineer @Simpson Thacher & Bartlett LLP

Role Description

The Senior Software Engineer will be a core member of the engineering team within the Knowledge & Innovation (K&I) department, responsible for designing, building, and operating the software systems that power the Firm's legal technology and AI initiatives. This role combines strong full-stack development skills with a focus on infrastructure, reliability, and the foundational systems that enable the team to ship and maintain production-grade tools at scale.

This role will work across the full stack — building custom applications for attorneys and Professional Staff, establishing the engineering infrastructure that the team relies on (CI/CD, deployment pipelines, observability), and contributing to the design and implementation of AI-powered solutions. The Senior Software Engineer will collaborate closely with the Director of Engineering, data scientists, knowledge management professionals, and practice solutions teams to deliver tools that make a measurable difference in how the Firm operates.

This is a hands-on, high-autonomy role on a small team where every engineer has significant ownership over the systems they build.

Qualifications

• Bachelor's degree in Computer Science or related working experience.

Requirements

• 7+ years of experience in software engineering, with demonstrated progression in scope and responsibility.
• Strong full-stack skills across JavaScript/TypeScript, React, Node.js, and Python.
• Experience with cloud infrastructure (AWS and/or Azure), infrastructure-as-code (Terraform/Bicep), and CI/CD pipelines (GitHub Actions or equivalent).
• Practical experience with AI/LLM integration in production systems, or strong aptitude and interest in developing it.
• Experience with agentic coding tools (e.g., Claude Code, Cursor, Codex).
• Comfort working directly with non-technical stakeholders — able to demo work, gather feedback, and explain technical decisions clearly.

Benefits

• NY Only: The estimated base salary range for this position is $180,000 to $210,000 at the time of posting.
• The actual salary offered will depend on a variety of factors, including without limitation, the qualifications of the individual applicant for the position, years of relevant experience, level of education attained, certifications or other professional licenses held, and if applicable, the location in which the applicant lives and/or from which they will be performing the job.
• This role is exempt meaning it is not overtime pay eligible.

Key Competencies

• Strong engineering judgment — knows when to build and what not to build.
• Comfort with ambiguity — can make progress with incomplete information and adjust as context develops.
• Pragmatic craftsmanship — cares about the quality and polish of what ships, without over-engineering.
• Curiosity and initiative — brings ideas, experiments, and improvements without being asked.
• Clear communication with both technical and non-technical audiences.