The round now totals $11.5 million. The company will use the funding to expand its feature set and fuel its growth in the enterprise market.

'Sapphire Ventures is thrilled to invest in Iron.io given its impressive traction in modern enterprises looking to architect job processing on a scalable, microservices platform,' said Anders Ranum, venture partner, Sapphire Ventures. 'Iron.io's ability to deliver a serverless experience by running large job processing workloads at scale across any cloud, hybrid or even on-premises is groundbreaking. We are excited to help the company accelerate growth in the enterprise market.'

Sapphire Ventures joins Baseline Ventures, Bain Capital Ventures, Divergent Ventures, Ignition Partners and Cloud Capital Partners as investors in this round. With this funding, Iron.io has raised a total of $17.4 million.

'We are excited to join Sapphire Ventures impressive portfolio of expansion-stage companies,' said Iron.io CEO and Co-founder Chad Arimura. 'By leveraging the firm's experience and extensive global network, Iron.io will be able to accelerate delivery of its job processing solutions to global enterprises.'

About Sapphire Ventures
Sapphire Ventures is focused on helping today's most innovative technology companies become global category-defining leaders. Leveraging nearly two decades of experience and an extensive global enterprise network, Sapphire Ventures invests capital, resources and expertise to enable its portfolio companies to scale rapidly. Whether entrepreneurs sell to businesses, consumers or both, Sapphire Ventures offers a powerful platform for business development and operational excellence to help them accelerate growth. With $1.4 billion under active management via direct growth investments and an early-stage fund investment strategy, Sapphire Ventures is uniquely positioned to elevate companies to the global stage. Find us in Palo Alto and London and at www.sapphireventures.com. Follow us @sapphirevc.

About Iron.io
Iron.io's job processing platform delivers and processes 100s of millions of messages and tasks every day. Its microservices architecture, delivered via Docker containers, enables the world's most innovative companies to bring products and services to market faster and increase revenue through the world's first enterprise-grade job processing solutions. Its asynchronous workloads operate in public and private clouds, on-premises, or hybrid environments, meeting enterprise requirements for flexibility, control and security-friendly solutions. Iron.io is leveraged by some of the world's most exciting companies such as Turner, Twitter, HotelTonight, Untappd, and Google. Learn more at www.iron.io.