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Java API Developer

  • Hybrid
  • 6+ years

Salary

Not stated

Similar roles pay £120K - 155K a year · our estimate

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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 the company

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.

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Where you’d work

Part of the week in the office

You can work from

  • United Kingdom

About the company

Company hidden

  • Industry: FinTech

Offices in London, United Kingdom, United Kingdom

Your chances

Still hiring, not crowded yet, and you'd be among the first.

  • 16 checks run
  • 5 good signs
  • 0 red flags

Still hiring?

11 checks

Actively hiring

In its favour2

  • Still on the company's own careers site, checked 2 h agoModerate evidence
  • Found in the last 48 hours, before the big job boardsModerate evidence

How crowded?

5 checks

Low

In its favour3

  • In its Early Window: not on the big job boards yetStrong evidence
  • Lead level: far fewer people qualifySlight evidence
  • Asks for Spring, which only 2% of open roles doSlight evidence

Fits Me

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Details13 facts · Role, Location, Compensation, Employment, Company
Tech stack
  • Node.js
  • Java
  • Kubernetes
  • JavaScript
  • Spring
Seniority
VP / C-level
Type
Full-time
Industry
FinTech
Specialty
Backend
Region
United Kingdom
Show 7 more factsShow less

Role

Category
Development
Specialty
Backend
Seniority
VP / C-level
Experience
6+ years
Tech stack
  • Node.js
  • Java
  • Kubernetes
  • JavaScript
  • Spring

Location

Work model
Hybrid
Region
United Kingdom
Offices
  • London, United Kingdom
  • United Kingdom
Remote from
  • United Kingdom

Compensation

Salary
Salary by agreement
Pay period
Annual

Employment

Type
Full-time

Company

Industry
FinTech

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