<div class="show-more-less-html__markup show-more-less-html__markup--clamp-after-5 relative overflow-hidden"> <p><strong>Senior Software Engineer (Backend / Voice Product)</strong></p><p><strong>Location:</strong> Berlin, Germany (hybrid)</p><p><strong>Employment Type:</strong> Permanent</p><p><br/></p><p><strong>Overview</strong></p><p>Trust In SODA are partnering with an innovative early-stage company building a voice-based therapeutic product. They are looking for a <strong>Senior Software Engineer</strong> with a strong backend focus to take ownership of the core runtime and delivery systems behind a real-time voice interaction platform.</p><p><br/></p><p>This is a <strong>high-impact product engineering role</strong>, where you will work across backend systems and a lean mobile client to deliver seamless, real-time audio experiences. You will play a key role as one of the early senior hires, shaping architecture, reliability, and overall product delivery.</p><p><br/></p><p><strong>Role &amp; Responsibilities</strong></p><ul><li>Own and develop the <strong>production backend runtime</strong>, including orchestration, state management, persistence, and service architecture</li><li>Design and maintain a <strong>real-time voice interaction pipeline</strong> (audio ingestion, speech-to-text, processing, text-to-speech, and streamed delivery)</li><li>Ensure <strong>low-latency, high-reliability performance</strong> across real-time systems</li><li>Take ownership of a <strong>cross-platform mobile client</strong>, ensuring robust session handling and audio performance</li><li>Build and scale systems with a focus on <strong>resilience, performance, and user experience</strong></li><li>Collaborate closely with product and engineering teams to deliver end-to-end solutions</li><li>Operate with a high level of autonomy in a fast-paced startup environment</li></ul><p><br/></p><p><strong>Requirements</strong></p><ul><li>Strong backend engineering experience, ideally with <strong>Python (Django or similar frameworks)</strong></li><li>Hands-on experience building or owning <strong>real-time audio or speech systems in production</strong></li><li>Experience with <strong>streaming data pipelines</strong>, particularly involving audio processing</li><li>Ability to design systems balancing <strong>latency, scalability, and reliability</strong></li><li>Experience delivering and maintaining a <strong>user-facing client application</strong> (mobile or web)</li><li>Comfortable working across both backend and client layers in a <strong>product-focused role</strong></li><li>Self-starter mindset with the ability to work in <strong>high-ownership, fast-moving environments</strong></li></ul><p><br/></p><p><strong>Nice to Have</strong></p><ul><li>Experience with <strong>React Native / Expo</strong></li><li>Knowledge of <strong>audio session handling</strong>, background processing, and interruption recovery</li><li>Familiarity with <strong>real-time communication protocols</strong> (e.g. WebSockets, WebRTC, gRPC)</li><li>Experience integrating <strong>speech-to-text and text-to-speech services</strong></li><li>Background in <strong>reliability-critical or regulated environments</strong></li><li>Previous experience in early-stage or high-growth startups</li></ul><p><br/></p><p><strong>Tech Stack</strong></p><ul><li><strong>Backend:</strong> Python (Django or similar)</li><li><strong>Mobile:</strong> React Native / Expo (preferred)</li><li><strong>Real-time Communication:</strong> WebSockets, WebRTC, gRPC</li><li><strong>Audio / Voice:</strong> Speech-to-Text &amp; Text-to-Speech integrations (STT &amp; TTS)</li><li><strong>Cloud &amp; Infrastructure:</strong> Modern cloud-based architecture </li></ul><p><br/></p><p><strong>Additional Information</strong></p><ul><li>Reports directly to the CTO</li><li>Hybrid/on-site working model in Berlin (strong preference for regular on-site collaboration)</li><li>English-speaking environment (German is a plus)</li></ul><p></p> </div>