Checkmate (itsacheckmate.com)
Senior Python Developer (Voice AI Platform) - India
We are developing a real-time voice AI platform that combines speech recognition, LLM-driven reasoning, and natural-sounding text-to-speech capabilities. This is production-grade software designed to run continuously, scale under heavy load, and deliver human-like conversations with minimal latency.
If you are a seasoned Python engineer who thrives on building resilient systems and solving tough concurrency challenges, this is the role for you.
What You’ll Do/Essential Job Functions
● Architect and build the conversation orchestration service: ASR → LLM inference → TTS streaming in real time
● Write robust, asynchronous Python code designed to handle high concurrency without deadlocks, race conditions, or memory leaks
● Design and maintain clean, well-structured APIs for future scalability and ease of debugging
● Manage interaction data using SQLAlchemy (or equivalent) with efficient schema design and safe migrations
● Implement observability: structured logging, metrics, and tracing across the system for instant issue diagnosis
● Partner with ML and Product teams to rapidly iterate on conversation flow and user experience
● Enforce a strong testing culture: automated unit tests, E2E flows, and load testing
● Build resilient systems capable of handling real-world edge cases like noisy audio, unreliable APIs, and flaky networks
● Continuously profile, optimize, and reduce latency and response times
Requirements
What We Expect You To Know/Requirement
● Deep Python expertise: 5+ years in Python, production systems experience required, context managers, generators, event loops, GIL, and effective use of asyncio
● Database fundamentals: data modeling, efficient queries, ORM best practices
● Networking & I/O: streaming, backpressure, and resilient design for unreliable networks
● Testing discipline: delivering production-ready, validated code
● Observability mindset: metrics, logs, and traces are integral to your coding process
● Production readiness: You’ve built and supported systems running live at scale.
What You’re Like
● Curious: You don’t just fix bugs — you find root causes
● Calm under pressure: You can diagnose incidents, resolve them quickly, and prevent recurrences
● Pragmatic: You solve problems without over-engineering
● Collaborative: You write code for your teammates and your future self
● Quality-driven: You refuse to compromise on correctness and reliability
● Data-informed: You make decisions based on real latency metrics, throughput, and error rates
What To Expect
This is not a feature-factory role. You will be responsible for building a real-time system that stays online, hits latency targets, and performs reliably under pressure.
Team Culture
● Direct, collaborative, and low on politics
● High ownership: see your work running in production, serving real users
● Obsessed with clarity, correctness, and reliability
● Fast-moving: minimal ceremony, maximum impact
● Pragmatic planning: no endless poker sessions — scope, assign, design, deploy.
Your Daily Work
● Ensure performance, reliability, and observability in everything you build
● Collaborate closely with ML and product teams on speech recognition, TTS voices, and LLM behavior.
● Monitor, debug, and improve the system as it runs in production.
Working Terms: The candidate must be flexible and work during US hours at least until 6 PM ET, which is essential for this role.
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