Technical Architect (Java) - Remote

UST; Madrid; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Health Care Plan

WFH policy

12 or 14 salary payments per year

Career development plans

Referral bonus program

UST Club discounts

Job summary

UST is seeking an experienced Technical Architect to anchor the TradeNxt team in Madrid, delivering robust, scalable and secure solutions for a mission-critical enterprise platform.

You will design end-to-end architecture, lead ADRs, review implementations, and ensure high availability, security and performance across distributed systems. Fluent English and Spanish are required, with hands-on Java/Spring Boot expertise and strong communication across international teams.

Qualifications

• 4+ years as Technical Architect leading the architecture and delivery of technically complex platforms or projects.
• 5+ years of software development experience with Java and Spring Boot.
• Advanced knowledge of Java 21 and Spring Boot 3.x.
• Strong experience with microservices and distributed systems, including synchronous and asynchronous integrations.
• Strong knowledge of REST API design, contracts, versioning and backward compatibility.
• Experience with Spring Data JPA, PostgreSQL, data modelling, transactions and query optimisation.
• Experience with Gradle and/or Maven, dependency management and multi‑module projects.
• Strong understanding of SOLID, DDD, Clean Architecture, design patterns and refactoring.
• Experience with JUnit 5, Mockito, AssertJ, integration and automated testing.
• Knowledge of concurrency, caching, messaging, idempotency, consistency, resilience and fault tolerance.
• Experience with Git, code reviews and branching strategies.
• Strong knowledge of CI/CD, automated quality controls, static analysis and controlled deployments.
• Experience with observability, including structured logging, metrics and distributed tracing.
• Previous experience in financial or regulated environments with high availability, security and traceability requirements.
• Professional English level, minimum B2.
• Professional Spanish level, minimum B2.

Responsibilities

• Define the end-to-end technical architecture, including components, integrations, data flows and dependencies.
• Lead architectural decisions and document them through Architecture Decision Records (ADRs).
• Translate functional and non-functional requirements into scalable and implementable technical solutions.
• Design distributed, resilient and scalable systems, considering concurrency, consistency, idempotency, fault tolerance and disaster recovery.
• Contribute to critical development activities and conduct architecture and code reviews.
• Define testing strategies covering unit, integration, contract, end-to-end, performance, resilience and security testing.
• Design and review REST APIs, integration contracts and persistence models.
• Ensure performance and capacity through profiling, load testing and measurable latency/throughput targets.
• Drive quality and automation across CI/CD pipelines.
• Embed secure‑by‑design principles, access control, secrets management and traceability.
• Identify technical risks, architectural debt and bottlenecks, assessing their impact on scope, cost and delivery.
• Collaborate with Architecture, Security, Infrastructure and Business teams in complex international environments.

Skills

Java/Spring

Distributed systems

REST APIs

CI/CD

Git

JUnit/Mockito

Security

English B2

Spanish B2

Architecture

Tools

Docker

Kubernetes

PostgreSQL

Gradle/Maven

Spring Data JPA

Kafka

Job description

Role Description

We are still looking for the very Top Talent… and we would be delighted if you were to join our team! More in detail, UST is a multinational company based in North America, certified as a Top Employer and Great Place to Work, with over 35,000 employees worldwide and a presence in more than 35 countries. We are leaders in digital technology services, providing large-scale technology solutions to major companies.

What we look for?

We are looking for an experienced Technical Architect to become a technical reference within our TradeNxt team, designing robust, scalable, secure and highly available solutions for a critical enterprise platform.

The ideal candidate combines strong hands‑on Java/Spring Boot expertise with extensive experience in software architecture, distributed systems and complex enterprise environments.

Key Responsibilities

• Define the end-to-end technical architecture, including components, integrations, data flows and dependencies.
• Lead architectural decisions and document them through Architecture Decision Records (ADRs).
• Translate functional and non-functional requirements into scalable and implementable technical solutions.
• Design distributed, resilient and scalable systems, considering concurrency, consistency, idempotency, fault tolerance and disaster recovery.
• Contribute to critical development activities and conduct architecture and code reviews.
• Define testing strategies covering unit, integration, contract, end-to-end, performance, resilience and security testing.
• Design and review REST APIs, integration contracts and persistence models.
• Ensure performance and capacity through profiling, load testing and measurable latency/throughput targets.
• Drive quality and automation across CI/CD pipelines.
• Embed secure‑by‑design principles, access control, secrets management and traceability.
• Identify technical risks, architectural debt and bottlenecks, assessing their impact on scope, cost and delivery.
• Collaborate with Architecture, Security, Infrastructure and Business teams in complex international environments.

Mandatory Requirements

• 4+ years of experience as a Technical Architect, leading the architecture and delivery of technically complex platforms or projects.
• 5+ years of software development experience, particularly with Java and Spring Boot.
• Advanced knowledge of Java 21 and Spring Boot 3.x.
• Strong experience with microservices and distributed systems, including synchronous and asynchronous integrations.
• Strong knowledge of REST API design, contracts, versioning and backward compatibility.
• Experience with Spring Data JPA, PostgreSQL, data modelling, transactions and query optimisation.
• Experience with Gradle and/or Maven, dependency management and multi‑module projects.
• Strong understanding of SOLID, DDD, Clean Architecture, design patterns and refactoring.
• Experience with JUnit 5, Mockito, AssertJ, integration and automated testing.
• Knowledge of concurrency, caching, messaging, idempotency, consistency, resilience and fault tolerance.
• Experience with Git, code reviews and branching strategies.
• Strong knowledge of CI/CD, automated quality controls, static analysis and controlled deployments.
• Experience with observability, including structured logging, metrics and distributed tracing.
• Previous experience in financial or regulated environments with high availability, security and traceability requirements.
• Professional English level, minimum B2.
• Professional Spanish level, minimum B2.

Nice To Have

• Experience with financial platforms, corporate banking, trading or mission‑critical transactional systems.
• Knowledge of Trade Finance or Documentary Trade.
• Experience with event‑driven architectures and Apache Kafka or similar messaging technologies.
• Knowledge of Docker, Kubernetes and Cloud environments.
• Experience with blue‑green, canary and rolling deployment strategies.
• Knowledge of OAuth2, OpenID Connect, threat modelling and secrets management.
• Understanding of SRE practices, SLI/SLO, high availability, disaster recovery and business continuity.
• Experience modernising legacy applications using progressive migration approaches such as the Strangler Pattern.
• Experience defining architecture standards and governance models within large organisations.

What can we offer?

• 23 days of Annual Leave plus the 24th and 31st of December as discretionary days!
• Numerous benefits (Health Care Plan, Internet Connectivity, Life and Accident Insurance).
• Flexible Compensation Program: meals, kindergarten, transport, online English lessons, Health Care Plan…
• Free access to several training platforms.
• Professional stability and career development plans.
• Referral bonus program.
• The option to choose between 12 or 14 salary payments per year.
• Real Work-Life Balance measures: flexibility, WFH/remote work policy, reduced working hours during summertime…
• UST Club Platform discounts and gym access discounts.

At UST, we are committed to equal opportunities in our selection processes and do not discriminate based on race, gender, disability, age, religion, sexual orientation or nationality. We have a special commitment to Disability & Inclusion, and we strongly encourage applications from professionals with a disability certificate.

Skills

Apache Kafka, CI/CD, Clean Architecture, Design Patterns, Distributed Systems, Docker, Mockito, Microservices, Kubernetes, Java, JUnit