Senior Java Developer

Fulcrum Digital; Dublin; Hybrid; EUR 90,000 - 120,000; Full time

Job summary

Fulcrum Digital in Dublin, Ireland, is seeking a Senior Software Engineer to join our engineering team on a critical payments-focused engagement. You will shape system architecture, lead design, and deliver scalable services and analytics-driven capabilities using Java, Databricks, and modern data technologies.

You will collaborate with cross-functional teams, mentor junior engineers, and ensure performance, security, and reliability across cloud-native platforms used by global markets.

Qualifications

• Java, Spring Boot, and RESTful APIs experience.
• Experience building cloud-native, scalable services.
• Bachelor's degree in computing or equivalent practical experience.

Responsibilities

• Lead team-level system design, APIs, data flows, and nonfunctional requirements.
• Collaborate with engineers to align with platform architecture and modernization goals.
• Develop and optimise data-intensive apps using Databricks and Spark.
• Mentor junior engineers through code reviews and knowledge sharing.
• Troubleshoot performance issues across services and cloud layers.

Skills

Java

Spring Boot

RESTful APIs

Cloud-native

Databricks

Education

Bachelor's degree in Computer Science or related field

Tools

Databricks

Spark

CI/CD

Job description

Who We Are

Fulcrum Digital is a global AI-first enterprise transformation company with over 25 years of experience. We partner with enterprises across financial services, insurance, healthcare, retail, manufacturing, higher education, and logistics to move from AI experimentation to scalable business outcomes. Fulcrum Digital works with over 100 global clients, including Fortune 500 enterprises, combining deep industry expertise with capabilities in enterprise AI, digital engineering, cloud modernisation, platform integration, and generative AI.

The Role

This is your chance to build software that powers how the world pays. We're looking for a technically strong Senior Software Engineer to join Fulcrum Digital's engineering team on one of our top client engagements — a global leader in payments technology whose platforms help business users everywhere make faster, smarter, data-driven decisions. You'll be at the center of financial services innovation, helping reimagine how mission-critical, cloud-native systems scale to serve some of the world's biggest markets. Based in Dublin, Ireland, with a hybrid working arrangement.

You'll help shape system architecture and non-functional requirements, including scalability, performance, security, and reliability, for platforms that businesses across the globe depend on. You'll work closely with cross-functional teams to solve complex technical challenges, lead team-level design, and ship scalable services, APIs, and analytics-driven capabilities using Java, Databricks, cloud platforms, and modern data technologies. It's a small, agile, high-trust team, where every engineer owns outcomes end-to-end, from ideation through production.

Why This Role

Work on mission-critical payments infrastructure used by businesses around the worldTackle large-scale, high-stakes financial data and analytics challengesHigh-autonomy team where your technical decisions carry real weightGrow with Fulcrum Digital's expanding footprint across Banking, Financial Services, and Insurance (BFSI)

What You'll Do

Lead team-level system design, including high-level design, detailed design, API contracts, data flows, service interactions, integration patterns, and nonfunctional requirements such as scalability, reliability, performance, security, and operabilityPartner with lead engineers and architects to align team-level implementations with broader platform architecture, modernisation goals, engineering standards, and long-term maintainabilityDevelop and optimise data-intensive applications and analytics capabilities using Databricks, Spark, and related technologies to process and deliver data at scaleServe as a hands-on technical contributor, designing, coding, testing, debugging, and delivering production-quality software across the full engineering lifecycleIdentify and resolve performance bottlenecks across services, APIs, data processing workloads, and user experiencesCollaborate with cross-functional teams to translate business requirements into scalable technical solutionsMentor junior and mid-level engineers through technical guidance, pairing, code reviews, documentation, and knowledge sharingContribute to a collaborative engineering culture by modelling ownership, clear communication, continuous learning, pragmatic decision-making, and high standards for software qualityImprove engineering quality through code reviews, design reviews, automated testing, secure coding practices, observability, performance tuning, CI/CD practices, and production readinessTroubleshoot complex issues across application, service, API, data, and cloud layers, driving root cause analysis and implementing durable solutions that improve platform reliability and supportabilityRequirements

Requirements

Mandatory: Java, Spring Boot, RESTful APIs6+ years of software engineering experience building scalable, distributed systems and cloud-native applications in an agile environmentExposure to TypeScript/React, SQL, and Databricks/Spark/PySpark for data pipelines is a plusProven ability to lead team-level design, evaluate technical trade-offs, and translate business needs into secure, maintainable solutionsStrong collaboration, communication, and problem-solving skills, comfortable working through ambiguityBachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience