Sr./Staff Backend Engineer - Java (Poland)

Oscilar; Poland; On-site; PLN 60,000 - 80,000; Full time

Benefits offered by this job

Competitive salary and equity packages

Unlimited PTO policy

100% Employer covered health insurance

Family-Friendly environment

Professional development opportunities

Job summary

Oscilar is seeking a talented Backend Engineer in Poland to design and maintain the core infrastructure of their AI Risk Decisioning Platform. You will develop scalable backend services using Java and AWS, collaborate with cross-functional teams, and optimize system performance. This role offers a competitive salary, remote work flexibility, and comprehensive health coverage. If you are passionate about backend development and making the internet safer, this is your opportunity.

Qualifications

• 5+ years of experience in backend software development.
• Strong experience in building and operating low latency, high scale services.
• Excellent problem-solving skills and attention to detail.

Responsibilities

• Design and develop scalable, high-performance backend services using Java and AWS.
• Collaborate with product management to define technical requirements.
• Optimize existing services for performance and reliability.

Skills

Java programming

AWS technologies

Microservices architecture

Docker

Kubernetes

CI/CD tools

Security best practices

Distributed systems

RESTful API design

Agile methodologies

Education

Bachelor's or Master's degree in Computer Science

Tools

Jenkins

Git

Maven

Gradle

Job description

Overview

Shape the future of trust in the age of AI. At Oscilar, we're building the most advanced AI Risk Decisioning Platform. Banks, fintechs, and digitally native organizations rely on us to manage their fraud, credit, and compliance risk with the power of AI. If you're passionate about solving complex problems and making the internet safer for everyone, this is your place.

Why Join Us

• Mission-driven teams: Work alongside industry veterans from Meta, Uber, Citi, and Confluent, all united by a shared goal to make the digital world safer.
• Ownership and impact: We believe in extreme ownership. You'll be empowered to take responsibility, move fast, and make decisions that drive our mission forward.
• Innovate at the cutting edge: Your work will shape how modern finance detects fraud and manages risk.

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

If you are passionate about backend development, real-time streaming, and scalable data systems, join us at Oscilar and make an impact.