Full Stack Software Engineer

Full Stack Engineer – Digital Payments

About Gen:

When you’re part of Gen, you’ll have the flexibility, tools and support to do your best work and grow your career – from flexible working options and time off to competitive pay, benefits and well-being programs.

What You'll Do

• Design, develop, and optimize full-stack applications (backend and frontend) for high-traffic payment platforms, ensuring performance, reliability, and scalability.
• Build high-performance, secure integrations with global Payment Service Providers (PSPs) using modern protocols and API standards.
• Develop responsive, intuitive frontend experiences using modern JavaScript frameworks while building robust backend services that power them.
• Create lightweight, well-documented APIs for seamless client, SDK, and cross-team communication.
• Ensure high quality of service (QoS) and maintain strong security standards across the entire stack.
• Tackle complex end-to-end problems with innovative solutions and foster a culture of openness, learning, and continuous improvement.

Mission and Goals

• Lead the technical design and hands-on full-stack development of high-traffic payment applications — from database to UI.
• Collaborate with Product Managers, Engineering leaders, and Architects to translate business requirements into scalable technical solutions.
• Own and drive complex technical designs of systems architecture and components built using Java/J2EE, Spring, Spring Boot on the backend and React, Vue.js, or Angular on the frontend.
• Collaborate across engineering and product teams to build secure, performant systems that meet strict SLAs.
• Contribute to the entire application lifecycle — development, testing, deployment, monitoring, and maintenance.
• Champion systems architecture improvements and drive continuous modernization of existing services.
• Integrate with global PSPs, ensuring seamless payment flows across regions and providers.

What You Bring

Required (10+ Years of Experience)

• Strong hands-on experience in Java, Spring, Spring Boot for backend development.
• Proficiency in at least one modern frontend framework: React, Vue.js, or Angular, with solid knowledge of HTML5, CSS3, and JavaScript/TypeScript.
• Experience designing and building APIs across multiple architectural styles — REST, Webhooks, SOAP, GraphQL.
• Proficiency with SQL (e.g., Oracle, PostgreSQL, MySQL) and NoSQL (e.g., MongoDB, Redis, DynamoDB) databases.
• Experience with cloud platforms — Azure, AWS, or both — including deployment, scaling, and managed services.
• Strong ability to write unit tests, integration tests, and automated test suites.
• Solid Object-Oriented Design skills and understanding of design patterns.
• Experience working in Agile/Scrum development methodology.
• Experience and desire to work in a global delivery environment across distributed teams and time zones.

Security Competencies

• Good understanding of API Security Best Practices for building secure applications across frontend and backend.
• Working experience applying strong cryptographic algorithms and secure hashing techniques.
• Hands-on experience with SAST/DAST tools to identify, review, and remediate security vulnerabilities.
• Good understanding of data security standards (e.g., PCI DSS, GDPR) and their application in payment systems.

Added Benefits (Nice to Have)

• AI Proficiency & Tools: Familiarity with AI-powered development and automation tools such as N8N, LangChain, Claude, GitHub Copilot, or similar platforms. Experience leveraging AI to accelerate development workflows, automate repetitive tasks, or build intelligent integrations is a strong plus.
• Exposure to AI/ML concepts and the ability to evaluate and integrate AI-driven capabilities into existing applications or workflows.
• Experience with containerization and orchestration (Docker, Kubernetes).
• Familiarity with CI/CD pipelines (Jenkins, GitHub Actions, Azure DevOps).
• Experience with message brokers and event-driven architectures (Kafka, RabbitMQ).
• Exposure to observability and monitoring tools (Datadog, Splunk, Grafana, ELK).

Whats Next:

• Recruiter Call
• Hiring Manager Interview
• Onsite Interview with Team