Senior Software Engineer – DaaS / APIs / MCP
Cognism · Poland ·
- Seniority
- Senior
- Category
- Software engineering
- Experience
- 5+ years
- Company size
- 1000+
Cognism · Poland ·
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As a Senior Software Engineer in the Warsaw Hub, you will design and maintain cloud-native backend services for Cognism's DaaS, APIs, and Model Context Protocol (MCP) capabilities. You will own features throughout the development lifecycle, collaborating with cross-functional teams to build scalable, high-performance systems.
Cognism is the leading provider of European B2B data and sales intelligence. Ambitious businesses of every size use our platform to discover, connect, and engage with qualified decision-makers faster and close more deals. Headquartered in London with global offices, Cognism’s contact data and contextual signals are trusted by thousands of revenue teams to eliminate the guesswork from prospecting.
About Cognism
Cognism is building Europe's leading B2B Sales Intelligence platform. Our engineering organisation is transforming around customer outcomes, data quality and AI-first engineering. The Warsaw Hub is being established as one of Cognism's two primary engineering centres and will play a key role in the company's long-term growth.
About the Role
As a Senior Software Engineer, you will build the services that power Cognism's strategic Data-as-a-Service (DaaS), APIs and Model Context Protocol (MCP) capabilities. You will work on cloud-native distributed systems processing large volumes of business data and exposing it through secure, scalable APIs used by enterprise customers and AI-powered workflows. This role is ideal for engineers who enjoy building high-quality backend systems while owning software throughout its lifecycle.
What You'll Do
What Success Looks Like
Required Experience
Nice to Have
Why Join Cognism
You will join the founding engineering team of Cognism's Warsaw Hub, helping build a strategic platform that will shape the company's future. You'll work in a modern engineering environment with significant ownership, direct impact on product direction and opportunities to influence architecture, engineering practices and culture from the earliest stages of the hub.
Hiring Process
At Cognism, we’re not just building a company - we’re building an inclusive community of brilliant, diverse people who support, challenge, and inspire each other every day. If you’re looking for a place where your work truly makes an impact, you’re in the right spot!
Our values aren’t just words on a page—they guide how we work, how we treat each other, and how we grow together. They shape our culture, drive our success, and ensure that everyone feels valued, heard, and empowered to do their best work.
Here’s what we stand for:
🤝 We Own the Outcome Together.
🤓 We Deeply Understand our Customers.
🏆 We Celebrate Impact Wherever It Comes From.
At Cognism, we are committed to fostering an inclusive, diverse, and supportive workplace. We welcome applications from individuals typically underrepresented in tech, so if this role excites you but you’re unsure if you meet every requirement, we encourage you to apply!
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