Senior Engineer, Software (Full-Stack)

Join a great place to work with MissionSquare, a financial services corporation with approximately $79 billion in assets under management and administration and over 600 employees. Founded in 1972, MissionSquare is dedicated to the retirement needs of public sector employees. We focus on delivering results-oriented retirement and retiree health savings plans, education, investment options, personalized guidance, and related services to public sector participants in more than 9,200 plans and nearly 2 million participant accounts. We strive to make the administration of retirement programs as easy and cost-effective as possible. We have an extraordinary talent base and invite you to consider joining MissionSquare.

The Senior Software Engineer (Full-Stack) designs, develops, and maintains MissionSquare’s next-generation web solutions. This role collaborates within Agile teams; including product, UX, and engineering; to deliver secure, scalable, and high-performing applications. The position ensures interoperability, reliability, and quality through disciplined engineering practices and continuous improvement.

***MissionSquare cannot sponsor or hire candidates with H1B, STEM or OPT visas for this role.***

Essential Functions for this role include:

• Design, develop, and maintain scalable, high-performance full-stack applications using modern front-end (React, HTML, CSS, JavaScript) and back-end frameworks (Node.js, Java/Spring Boot).

• Build and integrate secure, maintainable RESTful APIs for enterprise-grade systems.

• Design and implement integrations with internal platforms and external third-party systems to ensure interoperability and data integrity.

• Collaborate with product, UX, QA, and platform teams to ensure seamless interoperability across applications.

• Develop and execute unit and integration tests; contribute to test planning to ensure quality and reliability.

• Provide production support, troubleshoot issues, and lead root-cause analysis in collaboration with technical teams.

• Participate in Agile ceremonies (stand-ups, planning, reviews), communicate blockers, and report progress.

• Research emerging technologies (including AI) and recommend adoption strategies to improve automation, analytics, and developer productivity.

• Document technical designs, decisions, and implementation details; maintain comprehensive system documentation.

• Evaluate and recommend frameworks, libraries, and testing tools based on functionality, quality, and performance.

• Performs other duties as assigned

If you have the following skills, we encourage you to apply:

• BA/BS in Computer Science, Information Systems, Engineering, or related field; or equivalent experience.

• 5–7 years of professional full-stack engineering experience, including enterprise-scale component development and integrations.

• Experience in financial services or regulated industries highly desirable.

• React, JavaScript, HTML, CSS; front-end architecture and componentization.

• Experience using both SASS and SCSS.

• RESTful API design and implementation; Java/Spring Boot and Node.js.

• Experience working within an Oracle database environment.

• SQL/Oracle fundamentals; familiarity with stored procedures for data access patterns.

• Experience working within an Oracle database environment.

• Cloud platforms and CI/CD (AWS/Azure); containerization (Docker).

• Secure coding and SDLC controls; OWASP awareness.

• Git-based workflows (CodeCommit/GitHub); branching, code reviews, release management.

• AI-assisted development (code generation, automation, testing).

• YAML/JSON literacy for configuration and data interchange.

• Jira or similar ALM tooling.

• Strong written and verbal communication for technical and non-technical stakeholders.

• Debugging and troubleshooting across the stack; test planning and execution.

• Continuous improvement mindset; ability to learn and apply emerging technologies.

• Independently drive complex problem solving and root-cause analysis.

• Work autonomously and within teams; manage priorities and deliver results.

 To benefit your career and support your wellbeing, we offer:

• Competitive Total Rewards package, including base pay, incentive programs, benefits, and a 401(k) plan with matching contributions

• Flexible and hybrid work schedules to support work-life balance

• Tuition reimbursement to support continued education

• Professional and career development opportunities, including courses and certifications

• Comprehensive wellness programs promoting physical, mental, and emotional health

• Volunteerism initiatives to encourage community engagement

Click here to learn more about MissionSquare’s benefits.

Equal Employment Opportunity

As a company, MissionSquare is an Equal Opportunity Employer. We strive to create an environment that reflects the value and diversity of our employees and fosters respect among them. We believe that talent from diverse backgrounds will further enhance our ability, and mission, to serve those who serve their communities.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, or any other protected classifications under any applicable law.

This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.