Principal Java Engineer - Backend Platform

Hawk-Eye Innovations

Principal Java Engineer - Backend Platform Hawk-Eye Innovations - Budapest Salary: HUF 1.8M - 2.6M per month Contract: Full-Time, Permanent Location: Hybrid - minimum 2 days per week in office, Budapest ABOUT THE ROLE The Principal Software Engineer (Full-Stack, Backend-leaning) is a senior engineer responsible for the backend architecture, data pipelines, and API layer of a new sports technology product, while remaining capable of contributing to frontend development as needed. This role sits within a small, fast-moving product engineering team and requires someone comfortable owning end-to-end technical delivery across the stack, with backend and data work as the primary focus. WHAT YOU’LL BUILD You will be a core contributor to a new backend platform being built from scratch. The work spans the full data journey - from ingestion at the edge through to storage, transformation, and delivery to end users. Key areas of focus include: * Low-latency data pipelines that ingest and process live sports tracking data, with strict latency requirements for time-critical outputs delivered to coaches and analysts in near real-time. * Event-driven processing using Kafka for streaming data and control messages between on-site devices and cloud services, handling both fast-path live outputs and asynchronous post-processing workflows via SQS and AWS Batch. * Cloud infrastructure on AWS, including Greengrass for edge-to-cloud orchestration, S3 for video and data storage, and Lambda for lightweight processing tasks. * Data transformation and aggregation layers that normalise tracking outputs, store them in a data lake, and make them available to downstream consumers via clean API contracts. * REST and WebSocket APIs that serve both a live data product for immediate consumption and an insights portal for historical analysis and performance comparison. * Observability and reliability - instrumentation, logging, and tracing are built in from the start, not bolted on. The platform needs to run 24/7 without on-site support. KEY RESPONSIBILITIES * Design and build backend services and APIs (REST/WebSocket) supporting data ingestion, transformation, and delivery to frontend and downstream consumers, with particular attention to latency and throughput given real-time processing requirements. * Own data storage and pipeline architecture, including integration with streaming/event infrastructure. * Implement authentication and authorisation in line with the team's chosen cloud identity and access management approach. * Provide technical direction and review for frontend development (React/TypeScript), working closely with frontend engineers to align on approach, component contracts, and data shapes - this is a collaboration and oversight function rather than day-to-day frontend delivery. * Collaborate closely with computer vision/data science engineers to define and consume data contracts. * Participate in technical decision-making for a product in active development, including architecture choices with long-term implications for scale, latency, and maintainability. * Contribute to technical leadership of the wider engineering team, given the seniority of this role. SKILLS AND EXPERIENCE * Strong backend engineering background with production experience in Java (required). * Demonstrated experience building low-latency, high-throughput systems - this is a core requirement, not a nice-to-have. * Working knowledge of a modern frontend framework such as React/TypeScript, sufficient to review and direct frontend work rather than deliver it independently. * Experience with cloud infrastructure and event-driven architectures (e.g. Kafka or equivalent streaming technology). * Experience designing and evolving API contracts (OpenAPI or similar) in a fast-moving, still-evolving product environment. * Familiarity with modern cloud identity and access management approaches (e.g. AWS Cognito or equivalent) is a plus. * Strong communication skills - able to work directly with product and cross-functional stakeholders, and to mentor or direct engineers outside their own core discipline. * Comfortable with ambiguity: this is a build-phase product with evolving scope and infrastructure decisions still being finalised. BENEFITS AND PERKS * Annual leave in line with Hungarian labour law * Hybrid working - minimum 2 days per week in office * Sony Group perks - discounted tickets and events * Cafeteria allowance: SZEP Card, nursery/kindergarten support, MOL Bubi Pass * Private medical, life and accident insurance, dental discounts * Seniority awards and Employee Assistance Programme * All You Can Move fitness pass option EQUAL OPPORTUNITY EMPLOYER Hawk-Eye is committed to fostering an inclusive and diverse workplace. We ensure all employees are treated fairly, regardless of gender, marital status, race, nationality, religion, age, disability, or union membership. We value diversity and strive to create an environment where everyone can reach their full potential. APPLY TODAY If you are passionate about building high-performance backend systems and want to work on real-time data products at scale, we would love to hear from you.

Okta

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. Principal Software Engineer DEVICE IDENTITY AND ACCESS ORGANIZATION The Device Identity and Access organization is at the forefront of Okta’s Zero Trust vision. As a foundational pillar within Okta Research and Development (ORD), our mission is to transform the device itself into a secure, trusted, and effortless identity factor. We are the teams responsible for ensuring users can seamlessly interact with their work from any endpoint, anywhere in the world.   Our organization is comprised of engineers who thrive at the intersection of deep client-side platform engineering and massive-scale distributed systems. The work we do secures millions of enterprise endpoints globally, prevents modern identity attacks, and fundamentally changes how people work by making world-class security completely invisible to the end user. OPPORTUNITY We seek a highly impactful and influential Software Engineer to join our engineering team. The ideal candidate will leverage their deep expertise in distributed systems, particularly Java, to architect, build, and scale the critical server-side software and services at the heart of our security and identity platform. This is a high-visibility, hands-on opportunity to define the architectural vision, pioneer new capabilities, and drive the technical strategy to solve complex, company-wide challenges and shape the future of Okta's device identity ecosystem. You will act as a key technical leader—a player-coach and force multiplier—by setting the technical standard, mentoring and coaching engineers, and partnering with engineering leadership and product management to translate strategic business objectives into actionable, scalable technical roadmaps. This role requires an engineer who believes in designing for massive scale, rigorous code reviews, automated testing, and an iterative process to build high-quality enterprise software. WHAT YOU’LL BE DOING * Partner closely with Product Management, Engineering Directors, and Principal Architects to translate strategic business objectives into actionable, scalable technical roadmaps. * Drive cross-functional collaboration with Product, Design, and QA to ensure the seamless delivery of our most critical engineering initiatives. * Lead the design and implementation of new features and services within our core Java platform, taking ownership from conception to deployment. * Define and champion engineering best practices, and make critical contributions to technical designs, proposals, and long-term architectural decisions. * Act as a force multiplier across multiple teams, mentoring Staff and Senior engineers, guiding technical design reviews, and raising the engineering bar across the entire pillar. * Develop high-quality, maintainable software with comprehensive test coverage and drive improvements to our testing and CI/CD strategies. * Create and maintain high-quality technical documentation and foster a culture of knowledge sharing within the team and the broader organization. * Champion the adoption of AI-native engineering practices within our Product Development Lifecycle (PDLC), utilizing AI coding assistants to accelerate delivery while ensuring rigorous security and code quality standards. * Spearhead technical innovation, identifying emerging industry trends (such as advanced device security or AI-native development paradigms) and prototyping solutions to keep Okta ahead of the curve. MINIMUM REQUIREMENTS * 7+ years of progressive software development experience, with a proven track record of designing and building scalable, high-performance server-side features using Java and Spring. * Deep expertise with high-performance Postgres or MySQL environments, including schema design and query optimization. * Extensive experience designing, building, and securing RESTful APIs for large-scale systems. * Expert knowledge of server-side technologies, including caching, asynchronous processing, and multi-threading. * A deep understanding of design patterns, scalability patterns, security engineering, and object-oriented principles. * Experience in fast-paced agile environments, with a strong understanding of CI/CD and automated testing. * Excellent communication skills with the ability to articulate complex technical concepts to diverse audiences and influence technical direction. * Security Domain Expertise: Deep understanding of endpoint security concepts (e.g., Trusted Platform Modules (TPM), Secure Enclave, Device Management/MDM protocols, and endpoint detection). * Cross-Platform Context: Strong conceptual understanding of how OS-level security features (iOS, Android, Windows, macOS) report state to the cloud. * Proficiency in leveraging AI coding assistants (e.g., GitHub Copilot) to accelerate the development lifecycle. NICE-TO-HAVES * Experience building anomaly detection systems or risk systems is a huge plus. * Experience in cloud security, identity, and/or authentication protocols. * Understanding of Identity and Access Management protocols and technologies (FIDO, U2F, WebAuthn, SSO, SAML, OAuth, Federation, etc.). * Knowledge of cybersecurity principles, secure coding practices, and certifications like CISSP or Security+. * Experience with UI technologies such as ReactJS. * Exposure to gRPC API development. * Exposure to microservice architecture. EDUCATION Bachelor’s degree in Computer Science or equivalent experience. #LI-Hybrid P25224_3471791   The Okta Experience * Supporting Your Well-Being  * Driving Social Impact  * Developing Talent and Fostering Connection + Community We are intentional about connection. Our global community, spanning over 20 offices worldwide, is united by a drive to innovate. Your journey begins with an immersive, in-person onboarding experience designed to accelerate your impact and connect you to our mission and team from day one. Okta is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, ancestry, marital status, age, physical or mental disability, or status as a protected veteran. We also consider for employment qualified applicants with arrest and convictions records, consistent with applicable laws. If reasonable accommodation is needed to complete any part of the job application, interview process, or onboarding please use this Form to request an accommodation. Notice for New York City Applicants & Employees: Okta may use Automated Employment Decision Tools (AEDT), as defined by New York City Local Law 144, that use artificial intelligence, machine learning, or other automated processes to assist in our recruitment and hiring process. In accordance with NYC Local Law 144, if you are an applicant or employee residing in New York City, please click here to view our full NYC AEDT Notice.

Okta

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. DEVICE IDENTITY AND ACCESS ORGANIZATION The Device Identity and Access organization is at the forefront of Okta’s Zero Trust vision. As a foundational pillar within Okta Research and Development (ORD), our mission is to transform the device itself into a secure, trusted, and effortless identity factor. We are the teams responsible for ensuring users can seamlessly interact with their work from any endpoint, anywhere in the world.   Our organization is comprised of engineers who thrive at the intersection of deep client-side platform engineering and massive-scale distributed systems. The work we do secures millions of enterprise endpoints globally, prevents modern identity attacks, and fundamentally changes how people work by making world-class security completely invisible to the end user. OPPORTUNITY We seek a highly impactful and influential Software Engineer to join our engineering team. The ideal candidate will leverage their deep expertise in distributed systems, particularly Java, to architect, build, and scale the critical server-side software and services at the heart of our security and identity platform. This is a high-visibility, hands-on opportunity to define the architectural vision, pioneer new capabilities, and drive the technical strategy to solve complex, company-wide challenges and shape the future of Okta's device identity ecosystem. You will act as a key technical leader—a player-coach and force multiplier—by setting the technical standard, mentoring and coaching engineers, and partnering with engineering leadership and product management to translate strategic business objectives into actionable, scalable technical roadmaps. This role requires an engineer who believes in designing for massive scale, rigorous code reviews, automated testing, and an iterative process to build high-quality enterprise software. WHAT YOU’LL BE DOING * Partner closely with Product Management, Engineering Directors, and Principal Architects to translate strategic business objectives into actionable, scalable technical roadmaps. * Drive cross-functional collaboration with Product, Design, and QA to ensure the seamless delivery of our most critical engineering initiatives. * Lead the design and implementation of new features and services within our core Java platform, taking ownership from conception to deployment. * Define and champion engineering best practices, and make critical contributions to technical designs, proposals, and long-term architectural decisions. * Act as a force multiplier across multiple teams, mentoring Staff and Senior engineers, guiding technical design reviews, and raising the engineering bar across the entire pillar. * Develop high-quality, maintainable software with comprehensive test coverage and drive improvements to our testing and CI/CD strategies. * Create and maintain high-quality technical documentation and foster a culture of knowledge sharing within the team and the broader organization. * Champion the adoption of AI-native engineering practices within our Product Development Lifecycle (PDLC), utilizing AI coding assistants to accelerate delivery while ensuring rigorous security and code quality standards. * Spearhead technical innovation, identifying emerging industry trends (such as advanced device security or AI-native development paradigms) and prototyping solutions to keep Okta ahead of the curve. MINIMUM REQUIREMENTS * 7+ years of progressive software development experience, with a proven track record of designing and building scalable, high-performance server-side features using Java and Spring. * Deep expertise with high-performance Postgres or MySQL environments, including schema design and query optimization. * Extensive experience designing, building, and securing RESTful APIs for large-scale systems. * Expert knowledge of server-side technologies, including caching, asynchronous processing, and multi-threading. * A deep understanding of design patterns, scalability patterns, security engineering, and object-oriented principles. * Experience in fast-paced agile environments, with a strong understanding of CI/CD and automated testing. * Excellent communication skills with the ability to articulate complex technical concepts to diverse audiences and influence technical direction. * Security Domain Expertise: Deep understanding of endpoint security concepts (e.g., Trusted Platform Modules (TPM), Secure Enclave, Device Management/MDM protocols, and endpoint detection). * Cross-Platform Context: Strong conceptual understanding of how OS-level security features (iOS, Android, Windows, macOS) report state to the cloud. * Proficiency in leveraging AI coding assistants (e.g., GitHub Copilot) to accelerate the development lifecycle. NICE-TO-HAVES * Experience building anomaly detection systems or risk systems is a huge plus. * Experience in cloud security, identity, and/or authentication protocols. * Understanding of Identity and Access Management protocols and technologies (FIDO, U2F, WebAuthn, SSO, SAML, OAuth, Federation, etc.). * Knowledge of cybersecurity principles, secure coding practices, and certifications like CISSP or Security+. * Experience with UI technologies such as ReactJS. * Exposure to gRPC API development. * Exposure to microservice architecture. EDUCATION Bachelor’s degree in Computer Science or equivalent experience. #LI-Hybrid P25230_3471799 The Okta Experience * Supporting Your Well-Being  * Driving Social Impact  * Developing Talent and Fostering Connection + Community We are intentional about connection. Our global community, spanning over 20 offices worldwide, is united by a drive to innovate. Your journey begins with an immersive, in-person onboarding experience designed to accelerate your impact and connect you to our mission and team from day one. Okta is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, ancestry, marital status, age, physical or mental disability, or status as a protected veteran. We also consider for employment qualified applicants with arrest and convictions records, consistent with applicable laws. If reasonable accommodation is needed to complete any part of the job application, interview process, or onboarding please use this Form to request an accommodation. Notice for New York City Applicants & Employees: Okta may use Automated Employment Decision Tools (AEDT), as defined by New York City Local Law 144, that use artificial intelligence, machine learning, or other automated processes to assist in our recruitment and hiring process. In accordance with NYC Local Law 144, if you are an applicant or employee residing in New York City, please click here to view our full NYC AEDT Notice.