Senior Software Engineer

ACI Worldwide

. Perform and lead Level 3 support activities on cloud-native infrastructure .

Posted 10/14/2026full-timeTimisoara • RomaniaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expert-level proficiency in Java and Angular, with a strong foundation in distributed systems and cloud-native infrastructure. Capable of leading Level 3 support activities, troubleshooting complex issues, and mentoring engineering teams while ensuring compliance with security standards.

Highest-signal resume keywords

Expert-Level Java ProficiencyExpert-Level Angular ProficiencyHands-On Level 3 Production Support ExperienceStrong Technical Communication AbilityExperience with AI-Assisted Development Tools

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Java 17+ FeaturesSpring Boot/Spring EcosystemMicroservices ArchitectureEvent-Driven ArchitectureSecure Coding PracticesRESTful Service DesignTransaction Processing OptimizationSecurity Vulnerability RemediationPerformance TuningRoot Cause Analysis

Soft Skills

Mentoring AbilityTechnical CommunicationProblem-Solving

Tools & Technologies

AI-Assisted Engineering ToolsKubernetesContainersTicketing SystemsIncident Systems

Industry Keywords

Cloud-Native InfrastructureSaaS FundamentalsCompliance StandardsPCI-DSSSOC 2GDPRCCPA

Tech Stack

Tools & technologies

AngularAWSAzureCloudDistributed SystemsJavaKubernetesMicroservicesOpenShiftSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Perform and lead Level 3 support activities on cloud-native infrastructure
Troubleshoot complex issues, including intermittent failures, performance degradation, data corruption, and integration faults
Determine whether issues are defects, configuration problems, or usage problems
Provide or implement fixes, scripts, and data corrections
Triage, fix, and backport security vulnerabilities within remediation SLAs
Join P1/P2 incident triage, drive technical diagnosis, and help restore service
Provide technical updates to customers, account managers, and leadership during incidents
Participate in post-incident reviews
Feed production issues into the product roadmap and advocate fixes that reduce ticket volume
Manage the issues backlog, team capacity, support schedule, and on-call rotation
Use AI-assisted engineering tools for troubleshooting, code generation, review, test authoring, and incident triage
Mentor mid-level and junior engineers through documentation, demos, and coaching
Explain technical trade-offs and influence decisions with data and rationale

Requirements

What you’ll need

5+ years of professional software engineering experience
Track record of owning complex features or systems from design through production
Hands-on Level 3 production support experience, including live incident troubleshooting, root cause analysis, code fixes, security vulnerability remediation, SLA and on-call work
Experience diagnosing production issues using logs, metrics and tracing tools
Experience with ticketing and incident systems
Solid SaaS and cloud-native fundamentals
Working knowledge of secure coding practices, threat modeling, and access-control design
Daily use of AI-assisted development tools
Strong grounding in distributed systems, event-driven architecture, and microservices at meaningful scale
Strong technical communication and mentoring ability
Expert-level Java proficiency, including JVM internals, concurrency, performance tuning, Spring Boot/Spring ecosystem, and Java 17+ features
Expert-level modern Angular proficiency, including micro-frontends, performance tuning, secure front-end practices, dependency vulnerability remediation, and version upgrades
Hands-on experience with LLM APIs, prompt/workflow design, RAG patterns, and AI coding assistants
Demonstrated experience designing and optimizing transaction processing, payments, or equivalent high-throughput distributed systems
Experience with RESTful and event-driven service design, API versioning, backward compatibility, and contract testing
Familiarity with containers and Kubernetes, including AKS, EKS, GKE, or OpenShift
Azure experience; AWS familiarity is a strong plus
Compliance with ACI's Code of Business Conduct and Ethics and applicable security/data-protection standards, including PCI-DSS, SOC 2, GDPR, and CCPA
Comprehensive background screening required

Benefits

Comp & perks

Technically challenging work on a platform processing mission-critical payment transactions for financial institutions worldwide
Truly global product development organization with engineering centers across multiple regions
Cloud-native, automation-first engineering culture
Career growth and development into senior technical leaders and engineering managers
AI-native team with latitude to experiment, improve, and lead
Competitive compensation and benefits
Hybrid model, typically 2–3 days in-office across ACI's global hub locations
L3 production support rotation shared across the team
Some domestic and international travel (5–10%) as needed for customer or cross-team engagements