Sr./Staff Backend Engineer - Java (Poland)

Job Description

As a Backend Engineer at Oscilar, you will be responsible for designing, building, and maintaining the core infrastructure that powers our SaaS platform. You will collaborate closely with cross-functional teams, ensuring the delivery of highly reliable, low latency, and scalable services that meet the needs of our global enterprise clients.

Responsibilities

• Design and develop scalable, high-performance, low-latency backend services using Java and AWS technologies.
• Collaborate with the product management, frontend, and QA teams to define technical requirements and ensure smooth integration with other components of the platform.
• Optimize and enhance existing services to achieve maximum performance, reliability, and maintainability.
• Identify and resolve bottlenecks in the system, ensuring optimal resource utilization and system stability.
• Implement best practices for code quality, testing, and deployment, including continuous integration and continuous deployment (CI/CD) pipelines.
• Proactively monitor the health and performance of backend services, taking necessary actions to mitigate potential issues.
• Provide technical guidance and mentorship to junior team members.

Requirements

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
• 5+ years of experience in backend software development, with a focus on Java and AWS technologies.
• Strong experience in building and operating low latency, high scale services in a distributed environment.
• Proficient in Java programming, with a deep understanding of its ecosystem and related frameworks.
• Knowledge of microservices architecture, containerization technologies (Docker, Kubernetes), and distributed data systems (Kafka, Clickhouse).
• Familiarity with RESTful API design, and a strong understanding of security best practices.
• Experience with CI/CD tools (Jenkins, Git, Maven, Gradle) and agile development methodologies.
• Excellent problem-solving skills, attention to detail, and a strong ability to work independently or as part of a team.
• Strong communication skills, both written and verbal.

Benefits

• Compensation: Competitive salary and equity packages, including a 401k.
• Flexibility: Remote-first culture — work from anywhere.
• Health: 100% Employer covered comprehensive health, dental, and vision insurance with a top tier plan for you and your dependents (US).
• Balance: Unlimited PTO policy.
• Technical: AI First company; both Co-Founders are engineers at heart; and over 50% of the company is Engineering and Product.
• Culture: Family-Friendly environment; Regular team events and offsites.
• Development: Unparalleled learning and professional development opportunities.
• Impact: Making the internet safer by protecting online transactions.