--- title: 'Staff Software Engineer – DaaS / APIs / MCP at Cognism' canonical: 'https://feeny.ai/job/staff-software-engineer-daas-apis-mcp-cognism-poland-8ahv6thm4y1y' type: 'job' last_seen: '2026-09-06' --- # Staff Software Engineer – DaaS / APIs / MCP at Cognism - **Company:** Cognism - **Location:** Poland - **Posted:** 2026-08-26 - **Last confirmed live:** 2026-09-06 - **Apply:** https://www.cognism.com/jobs?gh_jid=4958778101 ## Job description ## WHO ARE WE 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 one of Europe's leading B2B Sales Intelligence platforms. Our mission is to help revenue teams find, enrich and engage the right customers through trusted, compliant and high-quality data. As part of our R&D transformation we are investing in a new Warsaw Engineering Hub that will become one of Cognism's two primary technology centres. The Opportunity This is not a traditional Staff Engineer position. You will become one of the founding senior technical leaders responsible for shaping the architecture, engineering standards and technical culture of the Warsaw Hub. You will work on the strategic DaaS, API and MCP platform that enables enterprise customers and AI agents to consume Cognism data at scale. ## What You Will Own - Technical ownership of critical platform capabilities across multiple engineering teams - Architecture of distributed backend systems supporting APIs, MCP and enterprise integrations - Engineering standards covering code quality, reliability, observability and maintainability - Mentoring Senior Engineers and acting as a technical advisor for Engineering Managers and Product Managers - Driving architectural decisions balancing customer value, scalability and operational simplicity What Success Looks Like After 12 Months - Key platform capabilities delivered to production - Measurable improvements in reliability, scalability and engineering velocity - Architecture decisions documented and adopted across teams - Warsaw Hub recognised for engineering excellence and technical leadership Required Experience - 8+ years building large-scale backend systems - Strong software architecture experience in distributed systems - Hands-on expertise with cloud platforms (AWS preferred) - Experience with event-driven architectures, APIs and microservices - Excellent communication and mentoring skills - Ability to influence without formal authority ## Preferred Experience - Kafka, Kubernetes, Terraform - Scala, Java, Kotlin or modern TypeScript/Node.js - Observability platforms such as Grafana or Prometheus - AI-assisted software development using Claude, GitHub Copilot or similar tools ## Why Join Cognism Joining now means becoming part of the founding engineering team building Cognism's Warsaw Hub from the ground up. You will influence technology choices, engineering practices and organisational culture while solving complex data-platform challenges with direct business impact. Our Hiring Process - Recruiter conversation - Hiring Manager interview - Technical architecture interview - System design session - Leadership conversation ## WHY COGNISM 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! ## About Cognism ## Company Overview - **One-liner**: Cognism provides premium B2B sales intelligence and data solutions for revenue teams, with a strong focus on European markets and compliance. - **Entity Type**: Private, venture-backed (total funding $131.5M) - **Headquarters**: London, United Kingdom - **Founded**: 2015 - **Founders**: Not publicly disclosed ## Core Business - **Primary industry**: Sales Intelligence / B2B Data - **Target customers**: Enterprise and mid-market sales, marketing, and revenue operations teams (B2B, especially those prospecting into EMEA) - **Mission or purpose**: “Making data more usable” – helping teams become fluent in their data so they can find the right people, move faster, and grow without guesswork. ## Products & Services - **Sales Intelligence**: Contact and company data with phone-verified mobiles, decision-maker coverage, and actionable signals (intent, hiring, funding). - **Data-as-a-Service (DaaS)**: Real-time access to verified B2B data via API or batch delivery, powered by a proprietary data fusion engine that combines news, registries, and third-party sources. - **Data Enrichment**: Fill gaps in CRM/marketing databases, prioritise ICP segments, and keep records accurate with continuous refresh (30-day cycle for director+ data). - **CRM Enrichment**: Automatically enrich inbound leads so records are complete and routable from the moment they enter the CRM. - **Compliance Layer**: GDPR and CCPA compliant data sourcing, strong Do-Not-Call coverage, ISO 27001 and SOC2 framework alignment. ## Market Standing - **Valuation/Market Cap**: Not disclosed - **Key Metric**: Annual revenue of ~GBP 32.9M (LinkedIn estimate); total funding of $131.5M across 10 rounds - **Notable Investors/Partners**: Not listed in available sources - **Growth Signals**: Trusted by 4,000+ revenue teams worldwide; operates in 20 countries; offices in London, Boston, Paris, Cologne, Skopje, and Zadar. Note: LinkedIn reports a 17% year-over-year headcount decline (372 employees, -93 people), which may reflect restructuring or strategic shifts. ## Competitive Advantages - **Compliance-first posture**: Built-in GDPR/CCPA compliance and extensive European Do-Not-Call coverage – a key differentiator for teams selling into EMEA. - **Phone-verified data**: Additional verification layers on mobile numbers result in up to 3x higher connect rates. - **European expertise**: Deep understanding of complex European markets, regulations, and local context. - **Data refresh cadence**: Decision-maker data refreshed every 30 days, ensuring high accuracy. - **Proprietary AI-driven data fusion**: Stitches hundreds of data points per company and filters through verification layers. ## Strategic Focus - Raising the standard for B2B data quality and compliance. - Expanding platform capabilities (signals, enrichment, API) to cover the full data lifecycle. - Scaling internationally while maintaining a “data fluency” approach – precision over volume. ## Why Work Here - **Culture**: Values include “deeply understand our customers,” “own the outcome together,” and “celebrate impact wherever it comes from.” Emphasis on trust, ownership, and collaboration. - **Global team**: Employees across 20 countries with offices in London, Boston, Paris, Cologne, Skopje, and Zadar. Likely hybrid/office-based depending on location. - **Diversity**: Careers page highlights that a significant portion of the revenue org and overall workforce are women (exact percentages not provided). - **Growth**: Opportunity to work on a product that powers modern revenue teams; fast-paced environment with real impact. - **Recruitment note**: Cognism warns of recruitment scams – they only hire for roles in official office locations and never ask for payment. ## Sources 1. [cognism.com/about-us](https://www.cognism.com/about-us) 2. [cognism.com](https://www.cognism.com/) 3. [cognism.com/careers](https://www.cognism.com/careers) 4. [linkedin.com/company/cognism](https://www.linkedin.com/company/cognism) 5. 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