Senior Back-End Engineer

Job description

About Us:

Payall Payment Systems is a dynamic and rapidly growing fintech startup focused on revolutionizing cross-border payments. Our mission is to provide seamless, secure, and innovative payment solutions for businesses worldwide. As we continue to scale, we are seeking a talented Senior Back-End Engineer to help build and maintain scalable, high-performance systems that power our products.

Position Overview:

As a Senior Back-End Engineer, you will play a critical role in designing, developing, and maintaining the core backend systems that drive our platform. You will collaborate closely with cross-functional teams to develop innovative solutions, ensure system reliability, and support business growth. This role requires a hands-on developer who thrives in a fast-paced startup environment. You will be expected to take full ownership of delivery of new functionality or removal of defects all the way through the development process.

Key Responsibilities:

- Architect, implement and deploy high-performance, multi-tenant services;

- Integrate with 3rd party services;

- Perform code reviews to ensure code quality, maintainability, and adherence to best practices;

- Write unit, functional and integration tests covering your code:

- Work closely with product managers, designers, and QA to deliver top-notch products:

- Involve in full software development lifecycle from concept to deployment, including maintenance;

- Contribute to CI/CD pipelines and optimize workflows for better efficiency;

- Create quality technical documentation to support the engineering and product teams;

- Implement and enforce secure coding standards to safeguard against security vulnerabilities;

- Actively participate in SCRUM rituals;

- Participate in product planning and roadmap discussions;

- Guide and mentor junior engineers, helping them to up their game;

- Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review;

- Document software designs decisions, APIs, and processes to support knowledge sharing and maintain technical clarity;

- Maintain publicly facing API documentation;

- Provide ongoing support and maintenance for existing applications, including bug fixes and performance enhancements.

Qualifications:

- 5+ years of hands-on experience designing, developing, and maintaining server-side applications using Java and/or Kotlin.

- Proven experience building and owning material components of large-scale financial systems, payment platforms, banking systems, or other mission-critical applications.

- Demonstrated experience designing and operating distributed systems, including understanding of scalability, reliability, fault tolerance, and performance optimization.

- Strong experience with data modeling, database architecture, and working with large-scale datasets and high-volume transactional data.

- Practical experience leveraging Artificial Intelligence (AI) tools and technologies within software development workflows, including improving engineering productivity, code quality, automation, or system capabilities.

- Proven ability to take end-to-end ownership of complex engineering initiatives, from architecture and design through implementation, deployment, and ongoing maintenance.

- Experience designing and developing microservices-based architectures and high-availability, low-latency systems.

- Strong proficiency with Java and/or Kotlin, including Spring Framework (Spring Boot, Spring MVC).

- Solid understanding of software architecture principles, design patterns, and engineering best practices.

- Experience implementing secure software solutions with a strong security-oriented mindset, particularly in environments handling sensitive financial or transactional data.

- Experience working with cloud platforms such as AWS or GCP.

- Experience with CI/CD pipelines, infrastructure automation, and modern software delivery practices.

- Proficiency with version control systems, particularly Git.

- Experience writing comprehensive unit, functional, and integration tests.

- Experience creating and maintaining technical documentation, API documentation, and software design specifications.

- Previous experience mentoring engineers, providing technical guidance, conducting code reviews, and helping improve engineering practices across a team.

- Strong problem-solving and analytical skills with the ability to operate effectively in a fast-paced startup environment.

- Excellent communication and collaboration skills, with the ability to work cross-functionally with Product, QA, Compliance, and other business teams.