Senior Application Developer

Fiserv

Senior Application Developer providing critical application support in Milan for Numia-owned systems. Collaborating with stakeholders and ensuring application stability and rapid incident resolution.

Posted 4/28/2026full-timeMilan • 🇮🇹 ItalySeniorWebsite

Tech Stack

Tools & technologies

Distributed Systems

About the role

Key responsibilities & impact

Provide application development and production support for Numia‑owned systems and integrations
Act as first‑line advisor for application incidents, analysis, and resolution during Italian business hours
Participate in out‑of‑hours (OOH) support for critical production issues as required
Diagnose and resolve application defects, performance issues, and integration failures
Perform root cause analysis (RCA) and implement corrective and preventive actions
Collaborate closely with Numia stakeholders, internal development teams, and infrastructure partners
Support deployments, patches, and minor enhancements to ensure platform stability
Ensure incidents and changes are managed in line with agreed SLAs and governance processes
Maintain accurate technical documentation and incident records
Contribute to continuous improvement of support processes and application resilience

Requirements

What you’ll need

Strong working knowledge of credit/debit card lifecycle, transactions, authorisations, clearing, settlement, and billing
Hands‑on experience with mainframe technologies, including: CICS (online transaction processing), DB2 (data access and analysis)
Ability to analyse and troubleshoot issues using mainframe utilities and tools, including Eazytrieve
Experience supporting API‑based integrations between distributed systems and mainframe applications
Solid understanding of production support, incident triage, root‑cause analysis, and escalation in a 24×7 environment
Experience working directly with client‑facing payment systems, responding to time‑critical and business‑impacting incidents
Fluent Italian and English (spoken and written)
Willingness to participate in out‑of‑hours (OOH) support as part of a support rota

Benefits

Comp & perks

Health insurance
Retirement plans
Paid time off
Flexible work arrangements
Professional development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

CICSDB2EazytrieveAPI integrationsroot cause analysisincident triageproduction supporttroubleshootingapplication developmentperformance analysis

Soft Skills

collaborationcommunicationproblem-solvinganalytical thinkingadaptabilityclient-facingtime managementattention to detailcontinuous improvementwillingness to participate in OOH support