NDA, Mobile Payment Platform | Senior Backend Developer (Java & Python)
SD Solutions
- Warszawa, mazowieckie
- Stała
- Pełny etat
Python).We are looking for a highly skilled Senior Backend Developer with solid experience in Java (primary) and preferably Python, to join our engineering team. You will be responsible for designing, building, and maintaining backend systems that power our web and mobile platforms. Knowledge of full-stack development is a plus, and you will work closely with frontend, DevOps, and product teams to deliver end-to-end features and improvements.SD Solutions is a staffing company operating globally. Contact us to get more details about the benefits we offer.Responsibilities:
- Develop and maintain reliable, scalable, and high-performance backend services and APIs.
- Collaborate with frontend developers and product teams to deliver complete features.
- Implement modern architectural patterns such as microservices, event-driven systems, and asynchronous processing.
- Write clean, well-documented, and testable code.
- Optimize application performance, identify bottlenecks, and improve efficiency.
- Contribute to the overall software architecture and recommend improvements.
- Maintain system quality through unit, integration, and automated testing.
- Troubleshoot production issues and participate in root cause analysis.
- Support integration with third-party APIs and external systems.
- Stay up to date with backend trends and best practices.
- 5+ years of backend development experience in production environments.
- Proficient in Java with frameworks like Spring Boot or Micronaut.
- Practical experience with Python (for services, automation, or tooling).
- Strong understanding of RESTful APIs, distributed systems, and service-oriented architecture.
- Experience with relational and NoSQL databases (e.g., PostgreSQL, Redis, Elastic search).
- Proficiency in version control systems (Git) and CI/CD pipelines.
- Familiarity with Docker, Kubernetes, and modern deployment environments.
- Experience with message queues or streaming systems (Kafka, RabbitMQ, or SQS).
- Strong problem-solving skills and attention to performance, security, and scalability.
- Familiarity with frontend frameworks (React, Angular, or Vue) and REST integration.
- Experience with cloud platforms (AWS, GCP, or Azure).
- Knowledge of monitoring tools (e.g., Prometheus, Grafana, ELK).
- Exposure to serverless or event-driven architecture.
- Comfortable working in Agile or Scrum environments.
As we undergo a significant technological transformation, we're rebuilding our platform from the ground up to enable speed, flexibility, and innovation. We're replacing legacy systems with a scalable Python-based architecture and integrating real-time and AI-driven components to deliver a best-in-class digital mobility experience.By applying for this position, you agree to the terms outlined in our Privacy Policy. Please take a moment to review our Privacy Policy , and make sure you understand its contents. If you have any questions or concerns regarding our Privacy Policy, please feel free to contact us.