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

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 This role is part of a major initiative to overhaul a 25+ year-old legacy system, replacing outdated infrastructure with a modern Spring Boot and microservices-based architecture.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

• 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)

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

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

The Offer You 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

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.

Posted by : Olivia Policastro

Specialization :

Javascript

Java