Senior Software Engineer, Core UX Platform

Senior Software Engineer

Company description

At PandaDoc, we're building the future of documents.
Our platform helps teams create, send, track, and e-sign proposals, contracts, and other documents, making our clients' lives more efficient and collaborative.

We’re a fast-growing company with a global reach. Our product is used by people around the world, from small businesses to large enterprises. In 2024, we reached a major milestone: over $100 million in annual recurring revenue! We're constantly innovating and releasing new features to meet the evolving needs of our customers, all while focusing on stability, quality, and performance.

Our Engineering team is a diverse and talented group of around 250 individuals, passionate about building a world-class product. While this is a fully remote position, we'd love for you to visit our vibrant offices in Warsaw, Lisbon, or Kyiv whenever you'd like to connect with colleagues in person.

About the role

PandaDoc is seeking a Senior Software Engineer to join our Core UX Platform team, part of the Core UX area within our Application Platform track. Your work will directly shape the frontend infrastructure and application framework that 35+ product teams build on top of, impacting millions of users across the PandaDoc ecosystem. As a Senior Engineer on the Platform team, you'll build and maintain the frameworks and libraries that other engineering teams depend on to ship products. This is infrastructure work — you'll drive large-scale migrations, publish versioned packages, and own the developer experience of your consumers across the organization.

About Core UX

Core UX is the foundational area for PandaDoc's frontend experience. We focus on building platform frameworks, intelligent tooling, and architectural foundations that enable product teams to move faster and build better. The Core UX Platform team specifically focuses on:

• Building and evolving the application framework, platform tooling, and architectural foundations that product teams depend on
• Decomposing legacy monolithic codebases into modular, scalable microfrontend architecture using Module Federation
• Providing versioned platform libraries consumed by 70+ product repositories across the organization
• Driving developer experience, performance, stability, testing, and maintainability improvements
• Leading modernization initiatives across the frontend ecosystem — React upgrades, build tooling migration, shared infrastructure

The platform consists of:

• Core application shell and bootstrap infrastructure
• Shared platform libraries and utilities
• Microfrontend framework — transport layer, module federation loaders, and runtime
• Build and developer tooling

What you'll achieve

Development

• Build and maintain Application Platform frameworks that standardize how product teams build, integrate, and ship frontend features
• Drive large-scale migrations and codemods across the codebase — React upgrades, build system modernization, API changes — often spanning multiple repositories
• Design and publish versioned platform libraries and developer tools with real downstream impact — changes you make propagate across the product ecosystem
• Ensure production-grade quality through comprehensive testing, performance instrumentation, and disciplined versioning and breaking-change management

Cross-functional execution

• Collaborate with Product, Platform, and Infrastructure teams to ensure a consistent, reliable, and high-performing application architecture
• Partner closely with Design Systems, Backend Platform, and DevOps to align on shared foundations and platform evolution
• Coordinate rollout strategies for platform changes that affect multiple consuming teams — migrations require communication, tooling, and patience

Evangelism

• Drive adoption of platfor