Senior Software Engineer

Senior Software Engineer Overview

ADUEX Engineering organization delivers scalable, secure, and innovative solutions that empower small and medium businesses globally. As part of a lean, high‑impact team, you will build cloud‑native software from the ground up, solving complex technical problems at scale.

As a Senior Software Engineer, you will act as a technical owner and key contributor across the full software lifecycle, from architecture and design through production operations.

• Design and evolve scalable, maintainable, and secure software solutions, translating business and technical requirements into well‑structured system designs.
• Contribute to and influence architecture decisions, defining patterns, standards, and best practices for APIs, event‑driven systems, microservices, and cloud‑native platforms.
• Evaluate technical trade‑offs and guide design decisions that ensure long‑term system sustainability.

• Independently design, build, test, deploy, and maintain high‑quality software components and services.
• Apply advanced data structures and algorithms to solve complex problems efficiently and optimize system behavior.
• Lead and actively participate in code reviews, ensuring high standards for readability, maintainability, performance, and security.
• Coach and mentor peers through technical feedback, pairing, and informal guidance.

• Proactively analyze and optimize application and system performance, scalability, and reliability.
• Design and execute performance, load, and stress testing strategies.
• Identify bottlenecks and drive tuning efforts across application, data, and infrastructure layers.

• Define and maintain comprehensive unit, functional, and integration testing strategies.
• Promote test automation and quality gates to ensure consistent and reliable delivery.
• Ensure systems behave predictably under normal and peak workloads.

• Design systems with operational readiness in mind, including observability, logging, monitoring, alerting, and resilience.
• Take ownership of production health within owned areas, participating in incident diagnosis, root‑cause analysis, and preventive improvements.
• Continuously improve reliability, maintainability, and supportability throughout the system lifecycle.

• Apply secure coding practices throughout the SDLC, adhering to Mastercard security standards and industry frameworks (e.g., OWASP, CWE).
• Ensure vulnerabilities are proactively identified and mitigated using automated tooling and secure design principles.

• Partner closely with Product, Architecture, Site Reliability, and Security teams to deliver aligned solutions.
• Influence team and cross‑team technical decisions through expertise and data‑driven recommendations.
• Contribute to engineering communities, guilds, and knowledge‑sharing initiatives across Mastercard.

• Proficiency and hands‑on experience building agentic frameworks in Python/Type Script.
• Strong experience and proficiency with modern web stacks, including Angular and React, along with JavaScript/Type Script and Node.js / Java microservices.
• Proven experience with backend development with JAVA required.
• Familiarity with Spring Boot frameworks preferred.
• Solid understanding of data structures, algorithms, and performance optimization techniques.
• Hands‑on experience building and operating cloud‑native systems (AWS/Azure), including APIs, event‑driven services, and distributed data stores (SQL, key‑value, or document databases).
• Proven expertise in secure coding practices and use of static and dynamic security analysis tools (e.g., Sonar, Checkmarx).
• Strong experience with Git‑based workflows, branching strategies, and leading effective peer code reviews.
• Demonstrated ability to design, implement, and maintain unit, service, and integration tests.
• Experience analyzing and troubleshooting issues across applications and systems, including production environments.
• Deep understanding of modern SDLC methodologies (Scrum, Kanban, SAFe) and when to apply them.
• Experience with…