Full Stack Software Developer Contract Jobs in Boston, MA

Manulife is a leading international financial services provider, helping people make decisions easier and lives better. Help shape the future you want to see — and discover that better can take you anywhere you want to go.

We are seeking a Senior .NET Full Stack Engineer to build and deliver scalable, enterprise-grade digital solutions that support secure, seamless, and customer-centric experiences.

In this role, you will work across the full technology stack—from modern React front ends to .NET 8 back-end services—contributing to high-impact initiatives. You will help shape architecture decisions, drive engineering best practices, and support continuous improvement through innovation and automation.

This is an opportunity to collaborate with cross-functional teams, influence technical direction, and mentor engineers while working in a fast-paced, agile environment.

• Design, develop, and maintain scalable web applications using React (front end) and .NET 8 (back end).
• Build and enhance RESTful APIs and microservices aligned with enterprise standards for security, resiliency, and performance.
• Leverage GitHub and GitHub Actions for source control, code quality, and CI/CD automation.
• Collaborate with product, design, and QA teams to deliver end-to-end features and business outcomes.
• Participate in code reviews, architecture discussions, and sprint planning to ensure engineering excellence.
• Troubleshoot complex technical issues and optimize system performance, reliability, and scalability.
• Mentor junior engineers and contribute to a culture of continuous learning and knowledge sharing.
• Stay current with emerging technologies and recommend improvements to frameworks, tools, and practices.

• 8+ years of experience in full-stack software development in enterprise environments.
• Strong hands-on experience with .NET 8, C#, ASP.NET Core, and Entity Framework.
• Experience building modern front-end applications using React and TypeScript.
• Proven experience designing and developing scalable APIs and distributed systems.
• Hands-on experience with GitHub, GitHub Actions, and CI/CD pipelines.
• Strong understanding of software engineering best practices (design patterns, secure coding, testing).
• Experience with unit and integration testing frameworks.
• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).

• Experience with microservices and API architecture design.
• Knowledge of application security and DevSecOps practices.
• Experience with Azure cloud services, including AKS (Kubernetes).
• Experience with event-driven architectures and messaging systems.
• Experience with containerization (Docker).Exposure to distributed and cloud-native systems.

• We’ll empower you to learn and grow the career you want.
• We’ll recognize and support you in a flexible environment where well-being and inclusion are more than just words.
• As part of our global team, we’ll support you in shaping the future you want to see.

The role being advertised is an existing vacancy.

About Manulife and John Hancock

Manulife Financial Corporation is a leading international financial services provider, helping people make their decisions easier and lives better. To learn more about us, visit https://www.manulife.com/en/about/our-story.html.

Manulife is an Equal Opportunity Employer

At Manulife/John Hancock, we embrace our diversity. We strive to attract, develop and retain a workforce that is as diverse as the customers we serve and to foster an inclusive work environment that embraces the strength of cultures and individuals. We are committed to fair recruitment, retention, advancement and compensation, and we administer all of our practices and programs without discrimination on the basis of race, ancestry, place of origin, colour, ethnic origin, citizenship, religion or religious beliefs, creed, sex (including pregnancy and pregnancy-related conditions), sexual orientation, genetic characteristics, veteran status, gender identity, gender expression, age, marital status, family status, disability, or any other ground protected by applicable law.

It is our priority to remove barriers to provide equal access to employment. A Human Resources representative will work with applicants who request a reasonable accommodation during the application process. All information shared during the accommodation request process will be stored and used in a manner that is consistent with applicable laws and Manulife/John Hancock policies. To request a reasonable accommodation in the application process, contact hr@manulife.com.

Referenced Salary Location

Boston, Massachusetts

Working Arrangement

Hybrid

Salary range is expected to be between

$107,450.00 USD - $199,550.00 USD

Employees also have the opportunity to participate in incentive programs and earn incentive compensation tied to business and individual performance. The actual salary will vary depending on local market conditions, geography and relevant job-related factors such as knowledge, skills, qualifications, experience, and education/training. If you are applying for this role outside of the primary location, please contact hr@manulife.com for the salary range for your location.

• Manulife/John Hancock offers eligible employees a wide array of customizable benefits, including health, dental, mental health, vision, short- and long-term disability, life and AD&D insurance coverage, adoption/surrogacy and wellness benefits, and employee/family assistance plans.
• We also offer eligible employees various retirement savings plans (including pension/401(k) savings plans and a global share ownership plan with employer matching contributions) and financial education and counseling resources.
• Our generous paid time off program in the U.S. includes up to 11 paid holidays, 3 personal days, 150 hours of vacation, and 40 hours of sick time (or more where required by law) each year, and we offer the full range of statutory leaves of absence.

• Know Your Rights
• Family & Medical Leave
• Employee Polygraph Protection
• Right to Work
• E-Verify

Company: John Hancock Life Insurance Company (U.S.A.)