Senior Software Engineer

JLL • Boston, CO

11h • Onsite

About The Position

JLL’s Citizen AI team builds AI products used by JLL employees, including JLL GPT. The Senior Software Engineer will join the team in Boston as a hands-on engineer, writing production code daily and using AI tools as a primary way of working to deliver features to a broad user base. The role builds and ships features for Citizen AI products from design through production and monitoring, using JLL’s AI platform, including its LLM gateway, shared RAG services, and MCP tools. The engineer partners with product and design teams to turn requests into working software, promptly fixes defects, and improves tests, observability, and developer tools. The role also involves following developments in the AI ecosystem and bringing relevant ideas to the team. The position is on-site in Boston, Massachusetts, and does not provide visa sponsorship; candidates must be authorized to work in the United States without sponsorship. Expected compensation is $160,000–$200,000 per year. Final compensation depends on factors including qualifications, location, market conditions, and internal considerations.

Requirements

• Production software experience in Python or TypeScript/Node.
• Experience building features with LLMs, such as prompts, RAG, or agent workflows.
• Experience with REST APIs, cloud services, and CI/CD.
• Daily use of AI coding tools as a core part of the workflow.
• Clear written English and ability to work well across time zones.
• Authorization to work in the United States without visa sponsorship.

Nice To Haves

• Experience with the Claude Agent SDK, MCP, or LLM observability.
• React experience.

Responsibilities

• Build and ship Citizen AI product features from design through production and monitoring.
• Build on JLL’s AI platform, including its LLM gateway, shared RAG services, and MCP tools.
• Use AI coding tools such as Claude Code or Cursor for design, coding, testing, and review.
• Work with product and design partners to turn requests into working software.
• Fix defects quickly and improve tests, observability, and developer tools.
• Follow the AI ecosystem and bring useful ideas back to the team.

Benefits

• 401(k) plan with matching company contributions.
• Comprehensive medical, dental, and vision care.
• Paid parental leave at 100% of salary.
• Paid time off and company holidays.
• Early access to earned wages through Daily Pay.
• Supportive culture and comprehensive benefits package prioritizing mental, physical, and emotional health.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed