The mascot for San-Francisco-based Iron.io, which drew seed funding from a group of investors, including Ignition Partners.

Ignition Partners has joined a $1.4 million funding round in San Francisco-based Iron.io -- the latest in a series of investments in California cloud startups for the venture-capital firm.

Iron.io provides cloud application services that are "massively" scalable, allowing developers to build applications without worrying about managing and scaling infrastructure. Current customers include eBay and cloud-logging service Loggly.

Here's how Iron.io describes its products:

Iron.io delivers two critical, high performance core queuing services built specifically for cloud applications: IronMQ, a high-performance message queue and IronWorker, a high-scale task queue... Both IronMQ and IronWorker are ready-to-use and ready-to-scale with simple connections to an API (Application Programming Interface) endpoints or inclusion of a few lines of code.

The startup said it will use the funding to develop new products, accelerate multi-language and multi-cloud support and add new partners (and customers, of course).

Ignition Partners joined venture-capital firms Baseline Ventures, Cloud Capital Partners, Citrix Systems and a number of angel investors in the round.

Ignition has been investing heavily in cloud-computing startups in recent months, many of which are concentrated in the San Francisco Bay Area. It has backed at least seven California startups in the last six months, including joining a $40 million round in Cloudera and pumping $15 million into ServiceMesh.

Ignition's Frank Artale, who joined the firm last year, has been a key driver behind many of the investments. Ignition also has invested in a number of Seattle-area startups this year, including Swype and Tier 3.