Software Engineer - Core Systems, Langflow Runtime (Remote US)

Company Description

Join us! DataStax is the company that helps Developers and Companies successfully create a bold new world through GenAI. We offer a One-stop Generative AI Stack with everything needed for a faster, easier, path to production for relevant and responsive GenAI apps. Generative AI has changed everything and this is the moment for you to act! Are you passionate about Gen AI, data and shaping the future? Do you want to help the leading developers and enterprises deliver the experiences that will change lives? Are you energized by solving hard problems with smart people while having fun? Were looking for sharp, innovative individuals to join us in serving our customers. If you're excited about making a valuable and real impact in the world of data and AI - reach out and join us.

Job Description

Core Systems Software Engineer Langflow Runtime

About the Team: Langflow is one of the most exciting and rapidly growing parts of our company. Langflow powers our open-source community, cloud offerings, and upcoming integrations with major platforms like NVidia R2X and IBM WatsonX. Our engineering team is scaling to meet demand, and we're creating a new Core Systems group focused on building the execution engine that powers Langflow applications at scale.

About the Role: We are looking for a Core Systems Software Engineer to join the new Langflow Runtime team. Your mission will be to help build a highly efficient, reliable, and scalable execution environment for Langflow applications capable of serving thousands of concurrent users with low latency and high resiliency.

This is a deep technical systems role not a frontend or typical backend "web app" position. You will work on the foundation of Langflows production infrastructure, ensuring we can deliver a world-class runtime experience both in the cloud and on-premises.

You will be joining a collaborative team of experienced engineers, working closely with other Langflow groups building the open-source platform, the cloud-hosted product (Astra integration), and the IBM Watson integration. Location: Remote (North American time zones preferred)

What you will do:

• Design, build, and optimize a new runtime execution engine for Langflow applications.

• Profile and optimize system performance (e.g., memory management, concurrency, throughput).

• Refactor parts of the existing Python-based runtime to improve reliability while building a next-generation architecture.

• Collaborate closely with the open-source and cloud product teams to ensure seamless integration.

• Participate in architecture discussions, design reviews, and planning sessions.

• Contribute to a strong engineering culture with code reviews, testing, and best practices.

• Mentor and support fellow engineers on system design and runtime development best practices.

Your Experience should include:

• 8+ years of software engineering experience with a focus on core systems, distributed systems, or runtime environments.

• Strong professional experience with Python

• Experience building scalable, concurrent server-side systems not just API endpoints.

• Familiarity with performance profiling and optimization (memory, CPU, network bottlenecks).

• Background with at least one lower-level systems language such as Go, Rust, or Java.

• Practical experience working on cloud-based services or other large-scale production environments.

• Ability to reason about system behavior under load, failure conditions, and scaling pressure.

• Experience with distributed systems patterns (e.g., actors, queues, caching, retries).

• Excellent communication skills and a collaborative, team-oriented mindset.

Nice to Have:

• Experience with open-source projects like Ray, Dagster, Dask or FastAPI.

• Previous contributions to cloud runtime infrastructure, ML ops infrastructure, or serverless runtimes.

• Interest in future leadership opportunities (e.g., tech lead roles as the team grows).

Why This Role?

• Work at the technical heart of one of the fastest-growing AI platforms.

• Tackle deep, complex engineering challenges that will scale to hundreds of thousands of users.

• Build alongside a vibrant open-source and developer community.

• Future leadership opportunities as the Langflow core systems group expands.

• Be adjacent to the hottest trends in AI without needing direct AI/ML model expertise.

Not sure if you qualify?

Apply anyway! We extend opportunities to a broad array of candidates, including those with diverse workplace experiences and backgrounds. Whether you're new to the corporate world, returning to work after a gap in employment, or simply looking to transition or take the next step in your career path, we are excited to connect with you.

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