Java API Developer, Assistant Vice President

State Street; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

State Street is seeking an experienced Java API Developer to join our Digital Asset team in London. You will design, build, and operate secure REST APIs for custody, tokenization, and settlement workflows, aligning with enterprise API standards and integration hub patterns.

You will work closely with product, architecture, and security to deliver policy-aware integration, robust data interfaces, and production-ready services in a regulated, high-availability environment.

Qualifications

• Strong experience building Java backend REST APIs in financial services.
• Hands-on with Spring Boot and Spring components used for API services.
• Experience deploying containerized Java microservices on Kubernetes (AKS).
• Experience with relational databases (Oracle) and ORM/data access patterns.
• Design and maintain API contracts with versioning and backward compatibility.
• Security-minded API engineering in regulated environments.
• Proven production-grade services with testing and observability.
• Ability to work with multi-location engineering teams.

Responsibilities

• Design, develop, and maintain Java backend services and REST APIs.
• Build API services that integrate via an Integration Hub and secure gateways.
• Implement APIs aligned to internal standards (security, docs, platform requirements).
• Partner with product, architecture, and security for integration patterns.
• Contribute to digital asset data patterns and data interfaces for reports/analytics.
• Build and maintain automated tests (unit/integration).
• Support production readiness: observability, incident triage, performance tuning.
• Collaborate across teams to drive clear API contracts for integrations.

Skills

Java

REST APIs

Security

Distributed systems

API design

High availability

Cross-functional collaboration

Tools

Spring Boot

Kubernetes (AKS)

Oracle

ORM patterns

CI/CD

Job description

Job Description

Role Summary

We are seeking an experienced Java API Developer to join our Digital Asset development team. This is a hands‑on engineering role responsible for building and operating secure, resilient API services that power institutional digital asset capabilities—spanning digital custody, tokenization enablement, digital transfer agency, and digital cash/settlement 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 backend services and REST APIs that support digital asset product flows (custody, tokenization, TA, digital cash/settlement) and integrate cleanly into the broader platform.


• Build API services that participate in the platform’s centralized integration approach—supporting client/app onboarding and app-to-service integrations via an Integration Hub and secure gateways.


• Implement APIs that align to enterprise API design/security/publishing requirements, ensuring designs are review-ready and compliant with internal standards (security, documentation, and platform requirements).


• Partner with product, architecture, and security stakeholders to implement policy‑aware integration patterns.


• Contribute to digital asset data patterns, including standardized interfaces and integration points such as Digital Data Interface and Digital Event Stream concepts where applicable for downstream reporting/analytics and operational workflows.


• Build and maintain automated tests (unit/integration) and ensure strong quality gates for services supporting regulated digital asset processing.


• Support production readiness: observability (logs/metrics), incident triage, performance tuning, and resilience improvements for APIs operating in a regulated, high‑availability environment.


• Collaborate across teams to drive clear API contracts and dependencies for integrations to traditional platforms (e.g., custody/cash/fund accounting) as part of a hybrid digital + traditional operating model.

Core/Must Have Skills

• Strong experience building Java backend APIs (REST) in financial services, ideally including digital assets or closely related domains (custody, cash, fund services, or regulated platforms).


• Hands‑on expertise with Spring Boot and common Spring components used for API services (web, security, data access).


• Hands‑on experience deploying and operating containerized Java microservices on Kubernetes (e.g., AKS), including working knowledge of core concepts such as Deployments, Services, Secrets, resource requests/limits, and basic troubleshooting in clustered environments.


• Experience working with relational databases (e.g., Oracle) and ORM/data access patterns.


• Proven ability to design and implement API contracts with strong discipline around versioning, backward compatibility, and documentation, aligned to internal API Development Standards.


• Strong understanding of security‑first API engineering in regulated environments (authentication/authorization patterns, secure integration paths, least privilege mindset).


• Experience delivering production‑grade services with strong engineering practices (code reviews, automated testing, operational readiness).


• Experience working effectively with multi‑location engineering teams.

Good To Have Skills

• Experience building services that integrate with digital asset platform components such as tokenization, wallet management, smart contract management, or custody‑related workflows.


• Familiarity with integration models that span traditional and digital, including standards‑based messaging approaches and hybrid architectures used to connect platforms.


• Exposure to event/data distribution patterns for digital assets (e.g., event streams and data interfaces that feed reporting/analytics/monitoring).


• Understanding of digital asset ecosystem concepts (permissioned vs permissionless connectivity; third‑party DLT providers; secure key infrastructure/HSM adjacency at a platform level).


• Exposure to Node.js for front‑end support or lightweight backend‑for‑frontend (BFF) services, including working with REST APIs and understanding how Node.js services integrate with enterprise Java or platform backends.

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-784668