Java API Developer, Officer

State Street; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

State Street in London seeks a Java API Developer to join our Digital Asset development team. This hands-on software engineering role designs, develops, tests, and supports RESTful APIs and backend services in a financial services environment.

You will work closely with cross-functional teams to build robust, scalable, and secure digital asset products that meet business and technical requirements; familiarity with Java frameworks and secure API practices is expected.

Qualifications

• Hands-on Java backend development with REST API delivery.
• Experience implementing secure APIs and data handling in financial services.
• Familiarity with SDLC, code reviews, testing, and Agile delivery.

Responsibilities

• Design, develop, and maintain Java backend services and REST APIs.
• Implement APIs with design, security, versioning, and documentation in mind.
• Collaborate with business and tech stakeholders to clarify requirements in Agile sprints.
• Write automated tests (unit/integration) and participate in peer reviews.
• Support production readiness, monitoring, and incident handling with senior guidance.
• Maintain technical API documentation including endpoints, payloads, dependencies, and notes.

Skills

Java backend

REST APIs

Spring Boot

Security fundamentals

SDLC & Agile

Tools

Maven

Jira

Observability basics

Job description

Role Summary

We are seeking a Java API Developer to join our Digital Asset development team. This is a hands-on software engineering role responsible for designing, developing, testing, and supporting

We are seeking a Java API Developer to join our Digital Asset development team. This is a hands-on software engineering role responsible for designing, developing, testing, and supporting RESTful APIs and backend services in a financial services environment. The role contributes to building reliable, secure, and well-documented services that integrate with upstream/downstream systems and support business-critical workflows. You will work closely with cross-functional teams to build robust, scalable, and secure digital asset products that meet our business and technical requirements.

Role Description

• Design, develop, and maintain Java-based backend services and REST APIs that support financial services workflows and data use cases.
• Implement APIs in line with internal requirements for API design, security, versioning, and documentation, ensuring solutions are consistent and reusable.
• Collaborate with business and technology stakeholders to understand requirements, clarify edge cases, and deliver well-scoped API changes in an Agile sprint model.
• Write automated tests (unit and integration), participate in peer code reviews, and contribute to quality gates for each release.
• Support service troubleshooting and production readiness activities such as logging, monitoring, defect triage, and minor performance tuning with guidance from senior team members.
• Maintain clear technical documentation for APIs and integrations (e.g., endpoints, payloads, dependencies, and operational notes).

Core/Must Have Skills

• Hands-on experience developing Java backend applications, including REST API development in production or near-production environments.
• Familiarity with common Java API frameworks and patterns (e.g., Spring Boot / Spring MVC-style services) and building maintainable service layers.
• Understanding of secure API fundamentals (authentication/authorization concepts, safe handling of sensitive data) and willingness to follow enterprise standards.
• Strong grasp of SDLC basics: source control, code reviews, automated testing, and working in Agile delivery.
• Experience working in financial services (or another regulated environment) where reliability, controls, and documentation matter.

Good To Have Skills

• Awareness of internal enterprise API governance and onboarding concepts (e.g., role of enterprise teams and standards in API publication and compliance).
• Experience with tools commonly used in enterprise Java teams (e.g., Maven/Jira-style workflows) and basic observability practices.
• Digital asset knowledge: familiarity with concepts such as custody, tokenization, wallets, or blockchain-adjacent workflows, enough to understand domain terminology and integration needs.
• Exposure to API integration patterns with third parties and documentation for API consumers.

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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Job ID: R-784675