Oh is looking for a Senior Backend Engineer to help evolve from a monolithic architecture to a microservices-based system that can scale to support millions of global users interacting in real time. You'll design, build, and optimize new services and shape the future of our core infrastructure.

What You'll Do

Design, build, and maintain high-performance backend services in Python using AWS Lambda and other serverless AWS components.
Lead the evolution from a monolithic codebase to a robust, scalable microservices architecture.
Develop and optimize APIs to support real-time, low-latency interactions between users and AI-powered characters.
Work closely with AI engineers, frontend developers, and DevOps to deliver seamless, high-impact features.
Optimize performance and scalability of OhChat.
Ensure backend services are secure, resilient, and able to handle high volumes of concurrent users globally.
Contribute to architectural decisions, set technical direction, and guide best practices in backend design and development.
Mentor junior engineers and help foster a culture of continuous improvement and technical excellence.

What We're Looking For

5+ years of professional experience building and scaling backend systems.
Strong proficiency in Python, with hands-on experience building serverless applications (preferably using AWS Lambda and experience migrating to a microservices architecture).
Deep understanding of AWS services, including API Gateway, DynamoDB, Step Functions, and related serverless components.
Strong experience with MongoDB, including performance optimization and data modeling at scale.
Proven experience designing and implementing microservices architectures.
Solid understanding of distributed systems, event-driven design, and low-latency API development.
Familiarity with CI/CD pipelines and automated testing frameworks.
Strong focus on security, performance, and fault tolerance in backend services.
Excellent problem-solving skills and the ability to thrive in a fast-paced, evolving environment.
Effective communication and collaboration skills.

Nice to Have

Experience supporting AI/ML-driven backend services and real-time applications.
Familiarity with WebSocket-based architectures and live data streaming.
Experience working in high-growth, consumer-facing tech startups.
Contributions to open source projects or active involvement in the Python development community.
Knowledge of content moderation or privacy considerations in large-scale social platforms.

Technical Stack

Python, AWS Lambda, AWS serverless components, MongoDB
AWS API Gateway, AWS DynamoDB, AWS Step Functions

Benefits & Compensation

Flexible, remote-first culture.
Competitive compensation and equity package.
High-impact role with opportunities to lead and grow alongside the company.

Work Mode

This is a remote-first position.

Join a diverse, ambitious, and creative team pushing technical and creative boundaries. Startup energy with the reach and excitement of a global product.