Software Engineer (C# - VSTO) - Europe

The company

At Rollstack, we're revolutionizing how businesses share and communicate their data. Data-driven slide decks and documents are pivotal in sharing data and insights within organizations and outside.

Rollstack is creating a new category in the modern data stack: Report Automation. We connect BI tools to slide decks and documents, automating their generation and updates, and effectively solving the last-mile problem of data presentation.

We assist some of the world's leading organizations, like SoFi, 1Password, and Zillow, in automating their slide decks and documents. We offer a remote-friendly workplace and are backed by Y Combinator, top VCs, and seasoned business angels.

We're a dynamic, talented, and innovative team committed to making a real difference in how companies present and utilize their data.

What You’ll Do

As a Software Engineer focused on VSTO:

• Extend and maintain our C# VSTO add-in for Microsoft PowerPoint.
• Build advanced user-facing features such as:
  • Dynamic data sync and refresh.
  • AI-generated insights embedded in slides.
  • Native chart rendering inside Office.
  • Data filters, refresh buttons, and editable content components.
• Interface with our backend (Node.js, Prisma ORM, Temporal) to sync document state with cloud data.
• Handle PowerPoint file parsing (e.g., XML, relationships) to track and update content programmatically.
• Integrate with BI tools like Tableau, Looker, and Metabase to bring visualizations directly into presentations.
• Build tight feedback loops for Office users through observability, error reporting, and usage analytics.
• Optimize the add-in’s performance, startup time, and reliability on large enterprise decks.

Tech Stack

• C# – VSTO add-in for PowerPoint, OpenXML
• Node.js & React – frontend/backend and sync engine
• PostgreSQL – relational data store
• Temporal – durable workflows for sync and automation
• Kubernetes (EKS) – minimal infra, deployed via Argo CD
• Langfuse, LangChain – for in-document AI features

What You’ll Gain Working at Rollstack

• Innovative Impact: Build core infrastructure at a YC-backed company, automating enterprise reporting.
• Collaborate with Experts: Work with a senior, product-oriented team across AI, data, and infra.
• Remote Culture: Fully remote team with diverse, inclusive values and flexible hours.
• Biannual Retreats: Join semi-annual team gatherings to connect, share, and recharge.
• Strong Equity: Get a meaningful stake in the company’s growth and future.

Who We’re Looking For

• 3–8 years of professional experience.
• At least 2 years of recent development experience in C#.
• Strong experience building or maintaining Office add-ins (VSTO experience is a must).
• Strong product intuition, with a track record of collaborating with PMs and designers.
• Comfortable digging into PowerPoint internals, Office APIs, and the quirks of COM interop.

At Rollstack, we’re looking for engineers who enjoy iterating, shipping quickly, and solving customers' problems. We want individuals who exhibit a strong sense of ownership and have a get-things-done mentality. Our engineering team defines and drives its technical agenda to continuously iterate on the product and solve our customers' most important problems.
Our interview process is designed to find these kinds of engineers:

• Two technical interviews, one with our CTO and one with one of our engineers. The format is some technical questions and some live coding exercises. We also try to ask questions relevant to the type of product we build. Use the language of your choice during these interviews.
• Two fit interviews with the other cofounders. These are not technical.