Lead Fullstack Engineer / St Louis / Java / React / MongoDB

Job Description

We are seeking a Lead Fullstack Engineer with strong experience in Java, React, and MongoDB to join a Wealth and Investment Management Technology team modernizing a core financial advisor platform. This role is part of a major initiative to overhaul a 25+ year-old legacy system, replacing outdated infrastructure with a modern Spring Boot and microservices-based architecture. The project will streamline account maintenance for financial advisors, reducing legal documentation from 90+ pages to just eight, and significantly improving workflow efficiency.
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\nIf you’re excited about building scalable applications, working across both frontend and backend (50/50 split), and leading efforts to modernize mission-critical platforms, this is an opportunity to make a large-scale impact. You’ll join a highly collaborative engineering team working in agile ceremonies while spending the majority of time hands-on coding.\nRequired Skills & Experience

• 7+ years of professional software engineering experience
• Strong expertise with Java Spring Boot for backend development
• Proficiency with React for frontend development
• Experience working with MongoDB or other NoSQL databases
• Fullstack development background with a balance of frontend and backend work
• Ability to write clean, maintainable, well-tested code in a collaborative environment
• Experience working in agile teams (stand-ups, retrospectives, sprint planning)\n

Desired Skills & Experience

• Familiarity with SQL (Oracle or SQL Server) for cross-team interaction
• Experience modernizing or rebuilding legacy platforms
• Background in microservices-based architecture
• Experience gathering requirements and collaborating with stakeholders across engineering, product, compliance, or risk
• Leadership experience (mentoring junior engineers, defining technical approaches, guiding design decisions)
• Strong problem-solving skills and ability to identify work independently\n

What You Will Be Doing

• Designing and maintaining backend services in Go
• Leading development of fullstack features with Java Spring Boot and React
• Collaborating with financial advisors, engineers, legal, compliance, and risk teams to define requirements
• Supporting modernization of a legacy financial advisor platform into a microservices-based application
• Designing and maintaining backend services, APIs, and data integrations with MongoDB
• Building user-friendly frontends to simplify workflows and improve efficiency
• Participating in agile ceremonies while dedicating ~90% of time to coding
• Contributing to long-term architectural decisions and system scalability\n

The Offer\nYou will receive the following benefits:

• Competitive compensation package
• Medical, Dental and Vision Insurance
• Hybrid work flexibility with location preference for St. Louis or Charlotte
• Opportunity to lead within a smaller engineering pod (4–7 engineers) while part of a larger 17-person group
• Exposure to greenfield modernization work on a high-impact platform\n

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\nApplicants must be authorized to work in the U.S. on a full-time basis now and in the future.
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