Principal Software Engineer (Java)
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Before you apply
LocationBangalore, Karnataka, India
Work modehybrid
Typefull-time
SeniorityLead
Experience10+ yrs
DepartmentEngineering
Company size1,001–5,000 people
First seenOct 18, 2026 · 2w ago
Verified live18h ago
At a glanceSummarised by Seekless from the posting.
Bachelor's degree in Computer Science or related field
10+ years of software engineering experience with proven technical leadership
Expert-level experience with Java, J2EE/Jakarta EE, Spring, Spring Boot, Hibernate/JPA
Deep expertise in Microservices Architecture, REST APIs, Event-Driven Systems, and Distributed Computing
Strong knowledge of Cloud Platforms (AWS/Azure/GCP), Docker, Kubernetes/OpenShift, and CI/CD practices
Experience with Kafka, Messaging Frameworks, API Gateways, and High-Volume Transaction Processing Systems
Experience with Angular as UI development
Strong understanding of application security, scalability, performance optimization, and reliability engineering
Proven experience evaluating and integrating AI/ML capabilities into enterprise applications and platforms
Strong understanding of Generative AI, Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), AI agents, and prompt engineering concepts
Experience designing and consuming AI-powered APIs and services (e.g., Azure AI, OpenAI, AWS AI Services)
Ability to identify business use cases where AI can improve customer experience, operational efficiency, product capabilities, and engineering productivity
Experience establishing governance, security, privacy, and responsible AI practices for enterprise solutions
Demonstrated use of AI-assisted development tools (GitHub Copilot, Cursor, AI coding assistants, etc.) to accelerate software delivery and improve code quality
Ability to drive technical strategy and architectural decisions related to AI adoption across engineering organizations
Exceptional communication and stakeholder management skills
Strong architectural thinking with a business-outcome mindset
Ability to influence technical direction without direct authority
Passion for mentoring and developing engineering talent
Experience in Payments, Financial Services, FinTech, or other regulated industries preferred
Experience building enterprise payment processing or financial technology platforms
Cloud certifications and enterprise architecture experience
Proven track record of leading large-scale modernization and digital transformation initiatives
Industry thought leadership, publications, patents, or conference speaking experience
Skills
Java
J2EE
Spring Boot
Microservices
Cloud Technologies
Angular
AWS
Azure
GCP
Docker
Kubernetes
OpenShift
CI/CD
Kafka
Hibernate
JPA
REST APIs
AI
ML
Generative AI
LLMs
RAG
Benefits
Health insurance
401(k)
Powering the world’s payments ecosystem
ACI powers the payments ecosystem – globally, and you power ACI. You’ll innovate, collaborate, and grow – in an energetic technology culture with decades of proven success. ACIers – in all roles and levels – are truly your colleagues and many are your friends. Our size and reach allow you to see the global impact of your work. You are visible, your talents are valued, and you are empowered to shape the future of payments.
About the role
As a Principal Software Engineer in Bangalore, you will join a diverse, passionate team, dedicated to powering the world’s payments ecosystem!
Job Summary
ACI Worldwide is seeking a highly experienced Principal Software Engineer to lead the architecture, design, and modernization of enterprise-scale payment solutions. This role is ideal for a hands-on technical leader with deep expertise in Java/J2EE, Spring Boot, Microservices, Cloud Technologies, Angular as UI development and Distributed Systems who can drive technical strategy, influence engineering direction, and mentor development teams across the organization.
Key Responsibilities
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Define and drive architecture, technical strategy, and engineering standards for mission-critical applications.
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Lead the design and development of scalable, secure, and high-performance Java-based enterprise solutions.
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Drive modernization initiatives, including cloud-native and microservices architectures.
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Provide technical leadership across multiple teams and serve as the escalation point for complex architectural challenges.
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Partner with Product, Engineering, and Business stakeholders to align technology investments with business objectives.
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Mentor senior engineers and promote engineering excellence, innovation, and best practices.
Required Qualifications
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Bachelor’s degree in Computer Science or related field.
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10+ years of software engineering experience with proven technical leadership.
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Extensive experience designing and delivering large-scale enterprise applications.
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Strong experience leading architecture and development across multiple teams.
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Experience in Payments, Financial Services, FinTech, or other regulated industries preferred.
Technical Expertise
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Expert-level experience with Java, J2EE/Jakarta EE, Spring, Spring Boot, Hibernate/JPA.
•
Deep expertise in Microservices Architecture, REST APIs, Event-Driven Systems, and Distributed Computing.
•
Strong knowledge of Cloud Platforms (AWS/Azure/GCP), Docker, Kubernetes/OpenShift, and CI/CD practices.
•
Experience with Kafka, Messaging Frameworks, API Gateways, and High-Volume Transaction Processing Systems.
•
Experience with Angular as UI development
•
Strong understanding of application security, scalability, performance optimization, and reliability engineering.
•
Experience evaluating and adopting emerging technologies, including AI-powered engineering tools.
AI & Emerging Technologies
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Proven experience evaluating and integrating AI/ML capabilities into enterprise applications and platforms.
•
Strong understanding of Generative AI, Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), AI agents, and prompt engineering concepts.
•
Experience designing and consuming AI-powered APIs and services (e.g., Azure AI, OpenAI, AWS AI Services).
•
Ability to identify business use cases where AI can improve customer experience, operational efficiency, product capabilities, and engineering productivity.
•
Experience establishing governance, security, privacy, and responsible AI practices for enterprise solutions.
•
Demonstrated use of AI-assisted development tools (GitHub Copilot, Cursor, AI coding assistants, etc.) to accelerate software delivery and improve code quality.
•
Ability to drive technical strategy and architectural decisions related to AI adoption across engineering organizations.
Professional Skills
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Exceptional communication and stakeholder management skills.
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Strong architectural thinking with a business-outcome mindset.
•
Ability to influence technical direction without direct authority.
•
Passion for mentoring and developing engineering talent.
Preferred Qualifications
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Experience building enterprise payment processing or financial technology platforms.
•
Cloud certifications and enterprise architecture experience.
•
Proven track record of leading large-scale modernization and digital transformation initiatives.
•
Industry thought leadership, publications, patents, or conference speaking experience.
Ideal Candidate
The ideal candidate combines deep expertise in Java/J2EE, Microservices, Cloud, and Distributed Systems with the ability to architect and scale AI-enabled enterprise solutions, driving innovation while ensuring security, reliability, and business value.
Core Capabilities
We seek colleagues who embody our core capabilities — these shape our culture and enable us to make a meaningful impact together:
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Ensure Accountability: holding self and others accountable to meet commitments.
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Drives Results: consistently achieving results, even under tough circumstances.
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Customer Focus: building strong customer relationships and delivering customer-centric solutions.
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Cultivate Innovation: creating new and better ways for the organization to be successful.
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Collaborates: building partnerships and working collaboratively with others.
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Courage: stepping up to address difficult issues, saying what needs to be said.
Benefits
In return for your expertise, we offer opportunities for growth, career development, and a competitive compensation and benefits package—all within an innovative and collaborative work environment.
Are you ready to help us transform the payments ecosystem? To learn more about ACI Worldwide, visit our web site at www.aciworldwide.com
ACI Worldwide is a global leader in mission-critical, real-time payments software. Our proven, secure and scalable software solutions enable leading corporations, fintechs and financial disruptors to process and manage digital payments, power omni-commerce payments, present and process bill payments, and manage fraud and risk. We combine our global footprint with a local presence to drive the real-time digital transformation of payments and commerce.