Full Stack Software Engineer

At Gen, we are scrappy and relentlessly customer driven. We create room for healthy debate, experimentation and continuous learning, and we seek out people with different experiences, identities and ideas to join our team. You’ll work with people who back each other, respect each other and understand that our differences are a competitive advantage.

If this sounds like you, we’d love you to be part of Gen.

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