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• Lead and mentor a distributed US team of 13 engineers across AI/ML, cloud backend, frontend, and DevOps.
• Conduct regular 1:1s, manage performance, support career development, and foster a high-trust, continuous-learning team culture.

• Keeping contact and cooperating with teams located in Hungary and in Germany
• Ensuring smooth and intense communication with colleagues and partners
• Writing software design documents
• Working with stakeholders for review and approval
• Designing new functionalities
• Implementing new functionalities

• Understand business processes and technical architecture
• Work on development for Line Balancing solutions
• Develop, design and maintain an E2E test strategy for a complex software solution
• Ensure the delivery as per requirements with good quality and performance

Collaborate closely with customers to understand their business and translate requirements into high quality software. Expect to visit our customers around 2-3 times per week....

Collaborate closely with customers to understand their business and translate requirements into high quality software. Expect to visit our customers around 2-3 times per week....

• Understand business processes and technical architecture
• Work on development for Line Balancing solutions Develop, design and maintain an E2E test strategy for a complex software solution to ensure the delivery as per requirements with good quality and performance

• Build and improve the WebRTC media pipeline across web, desktop and mobile clients, including audio, video, screen sharing and data channels.
• Develop and scale our Selective Forwarding Unit (SFU) and signaling services to support large meetings, webinars and breakout rooms.

Collaborate closely with customers to understand their business and translate requirements into high quality software. Expect to visit our customers around 2-3 times per week....

• Build and improve the WebRTC media pipeline across web, desktop and mobile clients, including audio, video, screen sharing and data channels.
• Develop and scale our Selective Forwarding Unit (SFU) and signaling services to support large meetings, webinars and breakout rooms.

Collaborate closely with customers to understand their business and translate requirements into high quality software. Expect to visit our customers around 2-3 times per week....

• Taking part in the BAU development tasks
• Designing, implementing, and delivering high-quality software solutions that conform to architectural standards
• Optimizing and refactoring existing code for improved reliability and performance
• Understanding and reworking/improving the existing codebase

• Designing, developing, and implementing scalable Salesforce solutions across Sales Cloud, Service Cloud, and Health Cloud
• Building and enhancing user experiences using Lightning Web Components (LWC) and Aura Components

• Design and build backend services in that handle high-throughput, low-latency messaging traffic
• Work on core infrastructure: message queues, delivery guarantees, connection handling, and storage layers
• Debug and optimize systems under real production load, not just in benchmarks

• Design and build backend services in that handle high-throughput, low-latency messaging traffic
• Work on core infrastructure: message queues, delivery guarantees, connection handling, and storage layers
• Debug and optimize systems under real production load, not just in benchmarks

• Perform functional validation and hardware/software integration testing
• Develop, maintain, and execute test scripts, including debugging and root-cause analysis
• Plan and execute functional tests, including the definition of test specifications and requirements traceability

• Perform functional validation, hardware-software integration testing, test script development, debugging, and issue resolution
• Contribute to functional test engineering activities, including test specification development, requirements traceability, and verification processes

• Design new protocol features and extensions, such as multi-device sync, group messaging and calls, and write the specifications for them.
• Implement protocol logic in and review implementations across our Android, iOS, desktop and web clients.

• Develop and specify cryptographic communication protocols
• Design cryptographic systems, such as key management and multi-device synchronization
• Lead Threema's migration to quantum-safe cryptography, together with the cryptography researchers at IBM Research

• Design new protocol features and extensions, such as multi-device sync, group messaging and calls, and write the specifications for them.
• Implement protocol logic in and review implementations across our Android, iOS, desktop and web clients.

Own the backend architecture. Our stack is Java 25, Boot 4, JPA, MariaDB, RabbitMQ, and Elasticsearch, among others....