The Impact You'll Drive

As a Senior ML Engineer (Speech Synthesis), you’ll be a founding member of the team building Telnyx’s next-generation speech synthesis systems. This is a greenfield opportunity — you’ll define the stack, architecture, and best practices for training and deploying state-of-the-art multilingual text-to-speech (TTS) models that power our voice AI agents.

You’ll build everything from distributed training pipelines to inference services that generate ultra-low-latency, lifelike voices across dozens of languages. Your work will bridge research and production — shaping how millions of people experience real-time conversational AI.

What You’ll Work On

• Own the stack from day one: Design and implement the ML training and inference pipelines for multilingual speech synthesis.
• Low-latency TTS: Engineer systems optimized for real-time, streaming speech generation with sub-100ms response targets.
• Train cutting-edge models: Build and fine-tune multilingual TTS systems using modern architectures — including LLM-based, diffusion, and flow-matching approaches.
• Massive-scale data processing: Develop pipelines for ingesting, aligning, and normalizing text, audio, and phonetic data across dozens of languages.
• Experimentation at scale: Run distributed training across multi-node GPU clusters, tracking results and iterating quickly.
• Cross-functional collaboration: Work with infrastructure and voice platform teams to deploy models that scale globally.
• Research meets production: Evaluate emerging techniques (LLM-guided synthesis, zero/few-shot voice cloning, full-duplex modeling) and bring them to life in production-grade systems.

What You’ll Work With

• Infrastructure: Docker, Kubernetes, Ray, Kubeflow, MLflow, Weights & Biases
• Data Systems: Kafka, Redis, PostgreSQL, Parquet
• You’ll define it: You’ll help select and implement the stack that supports distributed training, data processing, and inference for global deployment.

What We’re Looking For

• 6+ years of experience in machine learning or speech systems engineering
• Hands-on expertise with neural TTS, speech synthesis, or adjacent areas (ASR, voice cloning, multilingual modeling)
• You’ve obsessed over one or two hard problems, whether it’s building multilingual TTS from noisy data, teaching LLMs to speak, designing self-supervised audio encoders, or making diffusion models run in real time.
• Experience with LLM-based approaches to speech synthesis or prosody control
• Strong proficiency in Python and PyTorch
• Ability to deploy models efficiently (ONNX, TensorRT)
• Experience leading small teams and defining technical direction or team executables
• Production mindset: You build systems that run fast, stay stable, and are easy to maintain

Why Telnyx

You’ll be joining a company where voice, infrastructure, and AI converge. Telnyx is building the foundation for real-time, intelligent global communications — and your work on multilingual TTS will be at the core of that vision.



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Team and Responsibilities:

We are committed to delivering cutting-edge solutions with rapid implementation and high-speed innovation. As we continue to grow, we are looking for a talented Software Engineer II to join our team and contribute to our high-growth products that leverage on the NodeJS platform.

About You:

More than someone who checks every box, we’re looking for people who are excited to work and grow at Kaseya. If that's you, we hope you apply for the role!

• You enjoy teamwork
• You come up with new ideas and a unique point of view.
• You look forward to collaborating with a diverse team. You eagerly seek and give help. Transparency tops your list of values, and you contribute to a culture of respect and inclusion.
• You are inquisitive Inquisitive and focused, you see every challenge as an opportunity. You would rather create the future than wait for it.
• You are customer focused and take pride in your work
• You pay extra attention to details with all you do. You care about the work you provide for customers and how it reflects on yourself and the company. When you find or see something wrong, you attempt to resolve it.
• You look for opportunities to not only better yourself, but others around you. You aim to be the best that you can be and always do the right thing.

Key Responsibilities:

• Collaborate with cross-functional teams to develop, test, and implement software solutions that align with our product roadmap.
• Work on high-speed product development and contribute to the rapid delivery of new features and enhancements.
• Write clean, efficient, and maintainable code in Typescript.
• Collaborate with senior engineers to troubleshoot and resolve technical issues.
• Actively participate in code reviews, providing and incorporating constructive feedback.
• Stay up-to-date with industry trends and best practices to contribute fresh ideas and improve our development processes.

Qualifications:

• 3+ years of experience in software development
• Strong knowledge of NodeJS and Javascript/Typescript.
• Experience in working with React.
• Experience in large data management
• Experience with SQL Database (preferred MySQL)
• Experience with distributed storage

Nice-to-Have:

• Docker/K8S
• Bash
• Experience with DevOps tools and practices
• Search engine experience (OpenSearch)
• Experience in working with microservices
• Experience with Redis/Valkey
• Experience in large data management and Experience with distributed storage

If you are a motivated and fast-learning individual excited about working on high-speed product development with Node.js and React, we encourage you to apply. We’re looking for someone passionate about high-growth products and rapid delivery, who can quickly learn and adapt to new technologies, is open to feedback and continuous improvement, and brings strong problem-solving skills, attention to detail, and effective communication and teamwork.

What We Offer:

• Hybrid work model — 3 days/week in our Krakow office
• Collaborative and knowledge-sharing team culture
• Competitive salary & benefits