Senior Backend Developer (Monolith)

As a Senior Backend Developer at Paxful, your main responsibilities include designing, implementing, and maintaining scalable backend services, particularly utilizing Java. You will develop RESTful APIs, optimize microservices for performance, troubleshoot production issues, and ensure security best practices are upheld in fintech applications. Collaborating with teams is vital, as you will define and deliver new features that contribute to enhancing user experience.

To qualify for the Senior Backend Developer role at Paxful, candidates should possess over 5 years of experience in backend development with a strong emphasis on Java. Proficiency in Java frameworks like Spring Boot or Micronaut, a solid understanding of RESTful API design, and familiarity with both SQL (PostgreSQL) and NoSQL (MongoDB) databases are crucial. Additionally, experience with Docker, Kubernetes, and having knowledge of CI/CD pipelines are highly valued qualifications.

At Paxful, a Senior Backend Developer should be comfortable working with a variety of technologies, including Java, Go, and Node.js. Proficiency in frameworks like Spring Boot and experience with message queues such as RabbitMQ or Kafka are beneficial. Familiarity with performance monitoring and tools like Prometheus and Grafana is also advantageous, along with knowledge regarding security practices in backend development.

Paxful champions a remote-first approach, allowing employees from various geographical locations to contribute to their innovative projects. For the Senior Backend Developer position, this means enjoying flexibility in work hours with a 4-hour overlap with Eastern Time (EST). The fully remote environment supports collaboration and offers opportunities to connect with a diverse team committed to improving the financial landscape.

At Paxful, Senior Backend Developers have access to numerous professional growth opportunities. The welcoming culture prioritizes collaboration and innovation, allowing engineers to lead projects, mentor others, and continuously enhance their skills. With the chance to work on cutting-edge technologies, you’ll not only contribute to impactful projects but also grow significantly within the company.

To ensure scalability, I focus on using microservices architectures, which allow individual components to scale independently. I also implement load balancers, optimize database queries, and use caching where appropriate. Ensuring that my code is clean and maintainable allows the team to grow the system's capabilities effectively.

Absolutely! In my previous roles, I've designed RESTful APIs focusing on statelessness and resource-oriented architecture. I ensure that endpoints are intuitive and logical and that they adhere to standard HTTP methods for CRUD operations. Additionally, I implement versioning in APIs to maintain compatibility as they evolve.

My approach involves systematic monitoring and logging. I use tools like ELK Stack for log analysis to identify errors and performance bottlenecks. I also engage in root cause analysis to prevent similar issues and ensure that the solutions are not merely band-aids but fundamental fixes to the problems.

I regularly participate in online courses, webinars, and tech meetups. I also follow technology blogs and contribute to open-source projects, which provide exposure to cutting-edge technologies and emerging best practices. This allows me to stay informed and continuously improve my skill set.

In my last role, I faced performance issues with our API under heavy load. I analyzed database queries and optimized them significantly, reducing latency by implementing indexing and revising the query structure. Additionally, I utilized caching for frequently accessed data, which improved response times drastically.

I prioritize security by implementing authentication and authorization protocols such as OAuth and JWT. I also conduct regular code reviews focusing on security vulnerabilities, keep third-party dependencies up-to-date, and apply secure coding practices. Additionally, I perform penetration testing to identify any potential weaknesses.

I've worked extensively with cloud environments, particularly AWS and Google Cloud, utilizing their offerings to host services and manage databases. My experience with Docker allows me to create containerized applications, ensuring consistency across different environments, and I use Kubernetes for orchestrating these containers effectively.

I have a strong background in managing both relational and NoSQL databases. With SQL databases like PostgreSQL, I focus on writing efficient queries and optimizing database schema. For NoSQL databases like MongoDB, I emphasize data modeling and query optimization. I also implement backup and recovery processes to ensure data integrity.

I believe mentorship is crucial for a team's growth. I regularly hold code review sessions to share knowledge, encourage open discussions, and foster a learning environment. I also take the time to understand the career aspirations of team members to provide relevant guidance and support.

I utilize CI/CD pipelines through GitLab CI/CD, which automates testing and deployment processes. This ensures that any code changes are quickly integrated and tested, allowing for faster releases. Additionally, I emphasize writing automated tests to maintain code quality throughout the CI/CD process.