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Heizen
Software Development EngineerMar 2026 - May 2026
Remote- •Built a production voice interview agent using Pipecat, AWS Bedrock Nova Sonic, and LiveKit/WebRTC, migrating from LiveKit Agents SDK + GPT-4o Realtime to improve latency and reliability.
- •Designed concurrent interview slot management using Redis sorted sets and Lua scripts for atomic operations, eliminating race conditions under load.
- •Scaled backend to multi-EC2 deployment with BullMQ for distributed job dispatch and worker orchestration.
- •Implemented observability pipeline with Grafana, Loki, Promtail, and Langfuse (via OpenTelemetry) for real-time monitoring and LLM tracing.
- •Resolved production issues including Whisper hallucination during silence, S3 multipart upload credential errors, and WebRTC VAD concurrency bugs.
NestJSPipecatAWS BedrockLiveKit/WebRTCRedisBullMQGrafana/LokiLangfuseS3
FoundingLabs
Full Stack Developer InternAug 2025 - Nov 2025
Remote- •Developed a React Native app to automate developer workflows and reduce manual effort.
- •Engineered high-performance REST APIs using Node.js and PostgreSQL to improve data processing efficiency.
- •Integrated ML models to automate data classification tasks and optimize predictions.
- •Containerized services with Docker to standardize development environments and minimize deployment issues.
React NativeNode.jsPostgreSQLMachine LearningDockerREST APIs
Amazon MLSS'25
Amazon ML Summer School MenteeAug 2025 - Sep 2025
Remote- •Completed Amazon ML Summer School 2025, covering core ML topics such as Supervised and Unsupervised Learning, Deep Neural Networks, Dimensionality Reduction, and Sequential Learning
- •Explored advanced concepts including Generative AI, LLMs, Causal Inference, and Reinforcement Learning through expert-led sessions
Machine LearningDeep LearningGenerative AILLMsReinforcement Learning