PubNub
Real-time infrastructure API: chat, presence, live location, IoT signaling. 70+ SDKs, ~330M devices. Founded 2010, HQ San Francisco, ~147 staff, $135M raised. No open roles listed right now.
What is PubNub?
PubNub provides real-time communication infrastructure as a managed service. Its global Data Stream Network and API let developers build live features into their applications without operating their own low-latency messaging backbone: in-app chat and messaging, presence and online status, live location tracking, push notifications, multiplayer and live event experiences, and signaling for connected IoT devices. It ships more than 70 SDKs covering effectively every major platform and advertises worldwide data transfer times around 250 milliseconds, with a network reported to serve roughly 330 million devices and stream on the order of a trillion messages a month. PubNub was founded in 2010 by Todd Greene, who is Founder and CEO, and Stephen Blum, Co-Founder and Chief Technology Officer. It is headquartered in San Francisco with additional offices in London and Katowice, Poland, and employs roughly 147 people as of 2026. The company has raised about $135 million across its funding history, culminating in a $65 million Series E in November 2021. Its investor base is notably strategic rather than purely financial, including Sapphire Ventures, Scale Venture Partners, Relay Ventures, TiE Angels, Cisco Investments, Ericsson, Hewlett Packard Enterprise, Bosch, and The Raine Group, several of which are infrastructure and telecoms companies with a direct interest in real-time connectivity. One practical note for job seekers: as of this listing PubNub's own careers page states it has no current openings, so treat this as a company to watch for future roles rather than one accepting applications today.
Mission & values
Give developers real-time infrastructure as a service, so any application can add chat, presence, and live updates at global scale without building the network underneath it.
Qualifications
PubNub is a developer-infrastructure company, so its hiring skews heavily technical. The core engineering work is distributed systems and low-latency networking: building and operating a global data stream network that holds up at the scale of hundreds of millions of connected devices, plus site reliability and infrastructure engineering, security, and the maintenance of 70-plus client SDKs across platforms, which means backend, mobile, and web specialists. Around that it hires product management, developer relations and developer advocacy (important for a company whose customers are engineers), technical documentation, solutions and sales engineering, enterprise sales, customer success, marketing, and the usual finance, legal, and people functions. Experience with real-time systems, messaging protocols, WebSockets, distributed infrastructure, or developer-tools go-to-market are the strongest signals. Its offices are in San Francisco, London, and Katowice, Poland. Note two things before applying. First, PubNub's careers page currently lists no open roles, stating it has no current openings and inviting people to check back, so there may be nothing to apply to at the moment. Second, the company does not publish a remote-work policy, so whether roles are remote, hybrid, or tied to one of those three offices is unconfirmed and should be checked against individual postings when hiring resumes.
Leadership
Todd Greene
Co-Founder & Chief Executive Officer
Co-founded PubNub in 2010 and leads it as CEO, growing its real-time Data Stream Network to serve hundreds of millions of devices across a network streaming roughly a trillion messages monthly.
Stephen Blum
Co-Founder & Chief Technology Officer
Co-founded PubNub in 2010 and leads its technology as CTO, architecting the global low-latency data stream network and its 70+ platform SDKs.
Hiring process
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1
Check pubnub.com/company/careers
Note that the careers page currently states there are no open roles. It invites candidates to check back, so monitor it rather than applying now.
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2
Recruiter screen
When roles are open, confirms fit, level, which office or remote arrangement applies, work authorization, and pay expectations.
About 7 days
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3
Technical interview
Engineering: distributed systems and low-latency networking design, plus coding. Developer relations or solutions roles: a technical communication or integration exercise.
About 10 days
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4
Team interviews
Cross-functional interviews on technical depth, operating at scale, and fit against the company's stated values around decisive action and transparent communication.
About 10 days
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5
Offer
Offer in local currency for the relevant office, including stock options, which PubNub states it grants so employees are stakeholders.
About 7 days
Funding
Awards & recognition
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Network reported serving ~330M devices, streaming ~1 trillion messages monthly · 2026
PubNub
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Raised a $65M Series E backed by Cisco, Ericsson, HPE and Bosch · 2021
PubNub
Company information
- Industry: Real-Time Infrastructure / Developer APIs
- Location: San Francisco, CA, USA (+ London, UK and Katowice, Poland)
- Founded: 2010
- Employees: 147
- Website: www.pubnub.com ↗
- LinkedIn: Company page ↗
- X / Twitter: Profile ↗