Senior Software Engineer II, Data Integration (Haskell)

Location: Ghent, Belgium

Department: Engineering

About the Role

At HubSpot, we power the way businesses grow through our category-defining CRM platform and inbound marketing solutions. We're seeking a Senior Software Engineer II, Data Integration (Haskell) to join our Engineering team and play a pivotal role in connecting customer data across ecosystems. In this position, you'll architect resilient, high-performance data pipelines that enable seamless integrations between HubSpot's CRM and thousands of third-party apps, fueling personalized inbound marketing experiences and driving customer growth for our 200,000+ users worldwide. You'll dive deep into Haskell to build scalable ETL systems that handle massive data volumes with functional purity and type safety, ensuring data flows reliably from marketing tools, sales platforms, and analytics services into HubSpot's unified customer platform. Collaborating with cross-functional teams, you'll optimize for low-latency syncing, data enrichment, and real-time insights that empower inbound strategies. Our growth culture thrives on innovation, ownership, and HEART—Humility, Empathy, Adaptability, Remarkableness, Transparency—where engineers ship features that directly impact revenue and customer delight. As a senior contributor, you'll mentor peers, lead technical discussions, and influence our data architecture roadmap to support HubSpot's mission of helping businesses grow better. If you excel in functional programming, love tackling complex data challenges, and want to work in a flexible, high-impact environment with unlimited PTO and global perks, join us in redefining how the world does inbound.

Key Responsibilities

• Design, build, and optimize scalable data integration pipelines using Haskell to connect HubSpot's CRM with external data sources
• Develop robust ETL processes to ingest, transform, and synchronize customer data for inbound marketing campaigns
• Collaborate with product managers, data scientists, and other engineers to define data requirements for growth features
• Ensure high availability, low latency, and data accuracy in real-time integration systems supporting millions of customers
• Mentor junior engineers, conduct code reviews, and promote best practices in functional programming
• Troubleshoot and resolve complex data integration issues in production environments
• Integrate with third-party APIs and services to enhance HubSpot's inbound marketing and sales automation capabilities
• Contribute to the evolution of HubSpot's data architecture, focusing on scalability and performance
• Participate in agile ceremonies, including sprint planning and retrospectives, in our HEART-based culture
• Champion innovation in data processing to fuel customer growth and retention
• Document integration solutions and create tools to improve developer productivity

Required Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience
• 7+ years of professional software engineering experience, with at least 4 years focused on backend or data systems
• Expert-level proficiency in Haskell, including functional programming paradigms, monads, and type systems
• Proven experience building and maintaining high-throughput data integration pipelines and ETL processes
• Strong understanding of distributed systems, data modeling, and real-time data processing
• Experience with CRM systems, APIs, and third-party integrations in a SaaS environment
• Demonstrated ability to mentor junior engineers and contribute to code reviews
• Excellent problem-solving skills and ability to thrive in a fast-paced, growth-oriented culture

Preferred Qualifications

• Experience with HubSpot's CRM platform, inbound marketing tools, or similar marketing automation systems
• Familiarity with cloud platforms like AWS, GCP, or Azure for data-intensive workloads
• Contributions to open-source Haskell projects or functional programming communities
• Knowledge of data governance, privacy regulations (e.g., GDPR, CCPA), and security best practices
• Previous work in inbound marketing tech stacks or customer data platforms (CDPs)
• Master's degree in Computer Science or related field

Required Skills

• Haskell (expert)
• Functional programming
• Data integration/ETL
• Distributed systems
• API design and integration
• CRM platforms (e.g., HubSpot)
• SQL/NoSQL databases
• Real-time data processing
• Cloud computing (AWS/GCP)
• Problem-solving
• Code review and mentoring
• Agile methodologies
• Inbound marketing knowledge
• Data modeling
• Performance optimization
• Version control (Git)
• Collaboration tools (Slack, Jira)
• Growth mindset

Benefits

• Competitive salary and equity in a publicly traded company
• Comprehensive health, dental, and vision insurance with 100% premium coverage for employees
• Unlimited PTO and flexible work-from-anywhere policy
• 401(k) matching and employee stock purchase plan
• Professional development stipend and access to HubSpot Academy
• Parental leave (16 weeks fully paid) and family-forming benefits
• Wellness programs including mental health support and gym reimbursements
• Quarterly stipends for home office setup and learning
• Vibrant company culture with HEART values, volunteer days, and global offsites

HubSpot is an equal opportunity employer.