PubNub

PubNub Data Stream Network is a secure global Data Stream Network that enables mobile and web developers to build and scale real-time apps.

101-250 employees

Founded 2010

$65M series e

Developer APIs

Private Company

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Developer APIs Real Time Internet of Things Cloud Computing Web Development Apps+2 more

Remote-First Company

This company operates with a remote-first culture, allowing team members to work from anywhere.

Open Positions2

Remote-first within PolandFull-TimeReal-time ExperiencesPosted

Senior Backend Engineer - AI/LLM Systems

Ship AI-powered features into production
Integrate LLM inference, build evaluation and observability tooling, and own the full lifecycle of AI services
Work with providers like OpenAI, AWS Bedrock, Azure, or open-source models
Design low-latency inference pipelines for high-throughput message streams
Implement model routing, prompt and retrieval patterns (RAG), caching, batching, and fallbacks
Solve real-world constraints around latency, scale, and cost
Build internal frameworks, APIs/SDKs, and tooling for other teams
Partner with product and engineering on trade-offs between latency, cost, accuracy, and privacy

PythonTypeScriptAzure+1 more

Showing 1 of 2 positions

About PubNub

PubNub is building the future of real-time communication. They provide the secure global Data Stream Network (DSN) and easy-to-use APIs that developers need to connect, scale, and manage real-time applications and IoT devices. Their platform handles trillions of messages each month with ultra-low latency, ensuring seamless interactive experiences for millions of users worldwide. Companies like Verizon, Autodesk, Zillow, and Dropbox trust PubNub to deliver engaging features like chat, live updates, and interactive applications.

How We Work

You will join a remote-first, global team, collaborating across various time zones. PubNub values ownership and an execution-focused approach, with an emphasis on continuous improvement and process optimization. The company is committed to building a diverse and inclusive workplace.

Engineering at PubNub

Engineers at PubNub build and operate AI-powered services and platform tooling, solving complex challenges related to reliability, latency, cost, and quality at internet scale. You will work on greenfield systems, designing low-latency inference pipelines for high-throughput message streams and creating robust frameworks for product teams to ship AI features safely. The team leverages technologies like TypeScript, Python, and Rust, with a focus on event-driven architectures and real-time systems. They tackle hard constraints, ensuring features work in real-time with continuous customer impact.

Why Join Us

Shape the future of real-time communication and AI with a market-leading platform.
Work with cutting-edge technologies in a remote-first, globally distributed environment.
Own critical projects, contributing to systems that power millions of users worldwide.
Grow your career within a high-growth B2B SaaS company backed by significant funding.

Benefits & Perks

Competitive B2B compensation for Poland-based roles (PLN 26,000 - PLN 32,000 per month).
Competitive overall compensation for US-based roles (USD 175,000 – USD 180,000 per annum).
Equity in a profitable, fast-growing infrastructure company.
Flexible, remote-first work environment with optional office hubs.

Tech Stack

mobile

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