Lead Fullstack Engineer / St Louis / Java / React / MongoDB
St. Louis, Missouri
Hybrid
Contract
$69.5/hr - $78.31/hr
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 This role is part of a major initiative to overhaul a 25+ year-old legacy system, replacing outdated infrastructure with a modern Spring Boot and microservices-based architecture.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.
If 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. Required Skills & Experience
Applicants must be authorized to work in the U.S. on a full-time basis now and in the future.
#LI-OP
If 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. Required 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)
- 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
- 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
- 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
Applicants must be authorized to work in the U.S. on a full-time basis now and in the future.
#LI-OP
You will receive the following benefits:
- Medical Insurance - Four medical plans to choose from for you and your family
- Dental & Orthodontia Benefits
- Vision Benefits
- Health Savings Account (HSA)
- Health and Dependent Care Flexible Spending Accounts
- Voluntary Life Insurance, Long-Term & Short-Term Disability Insurance
- Hospital Indemnity Insurance
- 401(k) including match with pre and post-tax options
- Paid Sick Time Leave
- Legal and Identity Protection Plans
- Pre-tax Commuter Benefit
- 529 College Saver Plan
Motion Recruitment Partners (MRP) is an Equal Opportunity Employer. All applicants must be currently authorized to work on a full-time basis in the country for which they are applying, and no sponsorship is currently available. Employment is subject to the successful completion of a pre-employment screening. Accommodation will be provided in all parts of the hiring process as required under MRP’s Employment Accommodation policy. Applicants need to make their needs known in advance.