Senior Software Engineer, Data Integration (Haskell)

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At HubSpot, we’re building a world-class CRM, Marketing, Sales, and Services platform that helps small and medium-sized businesses grow better. More than 250,000 customers around the globe rely on our products, and we’re continuing to invest deeply in engineering to scale and innovate.

We’re looking for a Senior Software Engineer to join the Data Sync Engine team, the foundation of HubSpot’s Data Hub. This team is responsible for building and maintaining Data Sync: a best-in-class, real-time two-way sync platform that connects external SaaS tools with HubSpot’s CRM. On top of that, the team is also working on Data Studio: a brand new data ingestion platform, from where data can be combined, enhanced and activated upon, which is now more relevant than ever in the current AI age.

About the Team: Data Sync Engine

Data Hub is one of the fastest-growing parts of HubSpot’s ecosystem. It helps organizations stay productive by keeping their data consistent across tools like Salesforce, Microsoft Dynamics, and Zendesk.

At the core of both Data Sync and Data Studio is a flexible, high-performance engine powered by Haskell. This engine processes large volumes of data changes across systems, ensures accuracy, and provides customers with a real-time view of their data. The sync behavior is driven by a composable domain-specific language (DSL) interpreted at runtime.

You’ll be part of a team of experienced engineers who care deeply about functional programming, quality, and solving complex distributed system challenges.

In this role, you’ll:

• Design and implement platform capabilities that power both the Data Sync and Data Studio experiences.Contribute to the Haskell-based sync engine and evolve its DSL for new use cases.
• Build scalable infrastructure and performance-critical features across a distributed worker fleet.
• Develop monitoring and observability tools to ensure platform health.
• Invent reusable abstractions that extend the platform to support more SaaS integrations.
• Collaborate with teams across app integrations, product, and design.
• Work in a high-trust environment with product ownership and autonomy.

We’re looking for people who:

• Are proficient in Haskell (or excited to deepen their expertise).
• Have experience with distributed systems and data pipelines.
• Think in systems and care about correctness, reliability, and performance.
• Enjoy solving real customer problems and delivering outcomes.
• Balance engineering quality with product delivery.
• Take initiative and ownership of complex projects.
• Are comfortable analyzing trade-offs and making empathetic decisions.

What’s in it for you?

• Join an experienced and passionate team of functional developers.
• Significant autonomy in a high-impact, product-focused engineering culture.
• The opportunity to contribute to an advanced Haskell system, in production today.
• The ability to shape how customers connect their business tools in a rapidly growing space.

Tech Stack

• Primary language: Haskell
• Other technologies: Java, Go, Kafka, Kubernetes, Vitess, HBase, internal developer tools
• Platform: Microservices running in Kubernetes, built for scale and reliability

At HubSpot, we know the right candidate might not check every box. If this role excites you, we encourage you to apply. We’re committed to building a diverse, inclusive, and supportive workplace where you can do your best work.

We know the confidence gapandimpostor syndrome can get in the way of meeting spectacular candidates, so please don’t hesitate to apply — we’d love to hear from you.

If you need accommodations or assistance due to a disability, please reach out to us using this form.

At HubSpot, we value both flexibility and connection. Whether you’re a Remote employee or work from the Office, we want you to start your journey here by building strong connections with your team and peers. If you are joining our Engineering team, you will be required to attend a regional HubSpot office for in-person onboarding. If you join our broader Product team, you’ll also attend other in-person events, such as your Product Group Summit and other gatherings, to continue building on those connections.

If you require an accommodation due to travel limitations or other reasons, please inform your recruiter during the hiring process. We are committed to supporting candidates who may need alternative arrangements

*Massachusetts Applicants: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.*

Germany Applicants: (m/f/d) - link to HubSpot's Career Diversity page here.

India Applicants: link to HubSpot India's equal opportunity policy here.

About HubSpot

HubSpot (NYSE: HUBS) is an AI-powered customer platform with all the software, integrations, and resources customers need to connect marketing, sales, and service. HubSpot's connected platform enables businesses to grow faster by focusing on what matters most: customers.

At HubSpot, bold is our baseline. Our employees around the globe move fast, stay customer-obsessed, and win together. Our culture is grounded in four commitments: Solve for the Customer, Be Bold, Learn Fast, Align, Adapt & Go!, and Deliver with HEART. These commitments shape how we work, lead, and grow.

We’re building a companywhere people can do their best work. We focus on brilliant work, not badge swipes. By combining clarity, ownership, and trust, we create space for big thinking and meaningful progress. And we know that when our employees grow, our customers do too.

Recognized globally for our award-winning culture by Comparably, Glassdoor, Fortune, and more, HubSpot is headquartered in Cambridge, MA, with employees and offices around the world.

Explore more:

• HubSpot Careers
• Life at HubSpot on Instagram

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