Senior Software Engineer — App Modernization (Java)

We're building an AI-powered application modernization practice for major global financial institutions.

The work: take legacy enterprise applications — monoliths, on-prem deployments, decade-old frameworks — and move them to modern platforms (Kubernetes, cloud-native, containerized). Hundreds of applications, each with its own stack, quirks, and business constraints. Most happen to be Java, but not all.

What You Will Do

• Assess legacy applications end-to-end: architecture, dependencies, infrastructure, risk — using AI-assisted analysis tools

• Decide migration strategy for each app based on its characteristics, constraints, and business value

• Execute the full modernization: framework upgrades, dependency migration, containerization, CI/CD pipeline setup

• Deploy to target platforms — cloud services, or optimized on-prem — whatever makes sense for the app

• Shape the modernization practice itself: contribute patterns, templates, and lessons learned that make the next migration faster

• Collaborate with application teams who own the legacy systems

Required

• Strong Java/Spring expertise— the majority of the target portfolio is Java (10+years)

• Participation in modernization / tech transformation / legacy shift / migration to cloud / migration from legacy / tech upgrade / lift and shift / dockerization is a must

• Hands-on modernization experience— you've migrated enterprise applications from older frameworks, runtimes, or platforms to modern ones. Java is the most common target, but the next app could be anything

• Broad infrastructure knowledge

• Working knowledge of enterprise middleware and data infrastructure

• Open to AI-assisted workflows— we use Agentic AI and LLM tools daily as primary instruments

• Enterprise comfort— you've worked in large organizations with large-scale existing systems, change management, and compliance requirements; none of this is new to you

• Excellent written and spoken English

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field

Big Plus

• Experience with additional JVM or non-JVM backend stacks (.NET, Python, C++)

• Experience with AI/LLM tools specifically for code analysis, migration, or large-scale refactoring

• Financial services, capital markets, or fintech background — our clients operate in regulated environments with algo trading, post-trade processing, and real-time risk systems

• Kubernetes deployment experience (EKS, Helm, ArgoCD)

• Cloud migration patterns (lift-and-shift, strangler fig, blue-green, database migration strategies)

• ServiceNow, Confluence, Jira fluency — the enterprise tooling ecosystem

Why This Role

• Build the practice from scratch

• AI-first engineering

• Real engineering challenges

• High autonomy

• Top-tier clients

• Modern target platforms

We offer:

• Flexible work setup: remote model (Poland, Cyprus, Serbia, Georgia, Spain, Portugal, Armenia) or hybrid if desired

• Full health insurance coverage for those based in Poland and Cyprus

• 50% coverage of health insurance for spouses and children in Poland and Cyprus

• 24 days of paid vacation.

• 10 days of paid sick leave.

• 50% reimbursement for professional training, education, conferences.

• Work alongside a highly professional team.

• Engaging teambuilding events and activities.

In case of relocation to Poland or Cyprus, we offer:

• Flight tickets, accommodation rent for 1st month for our relocated employee and his/her official family.

• Support in visa application and issue process, entry permit and residence permit processing.