Sr. Software Engineer - REST API Development, AVP

Location: Burlington Massachusetts

About the Role

We are seeking a motivated and skilled Software Engineer to join our API Engineering team. In this role, you will design, develop, test, document, and support REST APIs that power critical business applications, partner integrations, and client-facing services.

You will work closely with architects, product managers, quality engineers, and platform teams to build secure, scalable, and reliable APIs using modern software engineering practices. This position is ideal for an engineer who enjoys backend development, systems integration, API design, and solving complex technical challenges.

Key Responsibilities

API Development

• Design, develop, and maintain RESTful APIs and backend services.

• Build reusable components, libraries, and integration services.

• Ensure APIs meet performance, scalability, reliability, and security requirements.

• Participate in API versioning, lifecycle management, and backward compatibility planning.

• Troubleshoot and resolve API and integration issues across development, testing, and production environments.

Documentation & Knowledge Sharing

• Create and maintain comprehensive API and integration documentation, including API specifications, developer guides, authentication and authorization requirements, onboarding materials, operational procedures, troubleshooting guides, and usage examples for internal and external consumers.

• Document system designs, technical decisions, and implementation approaches.

• Contribute to knowledge repositories and engineering best practices.

Integration & Architecture

• Develop integrations between internal systems, external partners, and cloud services.

• Implement API solutions that align with enterprise architecture standards.

• Contribute to microservices and event-driven integration patterns.

• Support API gateway onboarding and policy implementation activities.

• Assist with API modernization and legacy system integration initiatives.

Quality Engineering

• Develop unit, integration, and automated API tests.

• Participate in peer code reviews and design reviews.

• Support CI/CD adoption and deployment automation.

• Identify and address reliability, performance, and maintainability issues.

Security & Compliance

• Implement secure authentication and authorization mechanisms using OAuth 2.0, JWT, and related standards.

• Follow secure coding practices and enterprise security requirements.

• Support vulnerability remediation and compliance initiatives.

• Ensure appropriate logging, monitoring, and auditing capabilities are implemented.

Collaboration

• Participate in Agile/Scrum ceremonies and engineering planning activities.

• Collaborate with product, architecture, security, operations, and support teams.

• Communicate technical solutions effectively to technical and non-technical stakeholders.

• Contribute to continuous improvement of engineering standards and processes.

Required Qualifications

Education

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field, or equivalent practical experience.

Experience

• 3+ years of professional software development experience.

• 2+ years of experience developing and supporting REST APIs.

• Experience building backend services using Java, C#, .NET, Spring Boot, or similar technologies.

• Experience working with distributed applications and service integrations.

• Experience using Git-based source control and CI/CD platforms.

Technical Skills

• Strong understanding of REST API principles and HTTP protocols.

• Experience designing and implementing RESTful services and integrations.

• Experience with JSON, XML, and API integration patterns.

• Experience with relational databases and SQL.

• Knowledge of software design patterns and object-oriented programming.

• Familiarity with API security concepts and best practices including OAuth 2.0 and JWT.

• Experience with automated testing frameworks and API testing tools.

• Hands-on experience developing and deploying applications on Microsoft Azure.

• Experience with Kubernetes and containerized applications using Docker or similar technologies.

• Understanding of cloud-native application development, deployment, scaling, and operational best practices.

• Experience with CI/CD pipelines and DevOps practices.

Preferred Qualifications

• Experience with Azure API Management (APIM).

• Experience with event-driven architectures and messaging platforms such as Azure Service Bus, Event Hubs, Kafka, or RabbitMQ.

• Experience producing API and technical documentation.

• Experience with monitoring and observability tools such as Azure Monitor, Application Insights, Splunk, Prometheus, Grafana, or OpenTelemetry.

• Familiarity with Infrastructure as Code tools such as Terraform, Bicep, or ARM templates.

• Experience in financial services, fintech, or other regulated industries.

What We Value

• Strong analytical and problem-solving skills.

• Passion for building high-quality, maintainable software.

• Attention to detail and commitment to engineering excellence.

• Strong written and verbal communication skills.

• Ability to collaborate effectively in a cross-functional environment.

• Continuous learning mindset and willingness to adopt new technologies.

• Customer-focused approach to designing and delivering APIs.

• Ownership mindset with the ability to independently drive tasks to completion.

Salary Range:

$90,000 - $157,500 Annual

The range quoted above applies to the role in the primary location specified. If the candidate would ultimately work outside of the primary location above, the applicable range could differ.

Employees are eligible to participate in State Street’s comprehensive benefits program, which includes: our retirement savings plan (401K) with company match; insurance coverage including basic life, medical, dental, vision, long-term disability, and other optional additional coverages; paid-time off including vacation, sick leave, short term disability, and family care responsibilities; access to our Employee Assistance Program; incentive compensation including eligibility for annual performance-based awards (excluding certain sales roles subject to sales incentive plans); and, eligibility for certain tax advantaged savings plans.

For a full overview, visit https://hrportal.ehr.com/statestreet/Home.

About State Street

Across the globe, institutional investors rely on us to help them manage risk, respond to challenges, and drive performance and profitability. We keep our clients at the heart of everything we do, and smart, engaged employees are essential to our continued success.

We are committed to fostering an environment where every employee feels valued and empowered to reach their full potential. As an essential partner in our shared success, you’ll benefit from inclusive development opportunities, flexible work-life support, paid volunteer days, and vibrant employee networks that keep you connected to what matters most. Join us in shaping the future.

As an Equal Opportunity Employer, we consider all qualified applicants for all positions without regard to race, creed, color, religion, national origin, ancestry, ethnicity, age, disability, genetic information, sex, sexual orientation, gender identity or expression, citizenship, marital status, domestic partnership or civil union status, familial status, military and veteran status, and other characteristics protected by applicable law.

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It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.