We are building a modern web platform for aircraft maintenance programs that helps operators manage maintenance schedules, costs, and reliability across fleets of turbine-powered aircraft.

The goal is to deliver a scalable, production-ready React application that achieves full functional parity with the legacy system while modernizing architecture and developer workflows through AI-assisted development.

Role Overview

We are looking for a Senior React Engineer with deep expertise in modern React and TypeScript, strong API integration experience, and practical, daily use of AI coding tools.

This role involves leading the frontend modernization effort, collaborating closely with .NET backend engineers, and ensuring the new platform is scalable, maintainable, and production-ready.

Responsibilities

Frontend Development

• Build a modern React web UI with full functional parity to the legacy system
• Preserve all business rules and workflows during migration
• Design scalable component architecture

AI-Assisted Development

• Use AI coding tools (Copilot, Cursor, Claude Code, or similar) to generate components, tests, and refactor logic
• Critically review AI-generated code for correctness, performance, and accessibility
• Structure tasks to maximize AI tool effectiveness

API Integration

• Integrate with .NET RESTful APIs
• Handle data fetching, caching, optimistic updates, and error states
• Collaborate on contract-first API design

System Modernization & Migration

• Support migration from legacy PHP-rendered frontend to React
• Contribute to backend modernization (.NET transition) while preserving business logic

Testing & Quality

• Write component and integration tests (React Testing Library, Vitest/Jest)
• Leverage AI to accelerate coverage
• Ensure automated tests validate functional equivalence

Delivery & Data Migration

• Deliver features in staged increments with checkpoints
• Support migration of existing system data and additional flat-file imports

UI/UX & Styling

• Build responsive, consistent interfaces using modern styling approaches
• Translate design specs or legacy UI screenshots into scalable React components

Knowledge Sharing

• Help teammates adopt AI-assisted frontend practices
• Share effective prompting techniques and internal best practices

Requirements

• Deep expertise in modern React (functional components, hooks, custom hooks, lifecycle understanding)
• Strong decision-making around state management (Context API, Zustand, Redux Toolkit, etc.)
• Ability to design scalable component architectures

TypeScript

• Strong proficiency in typing props, hooks, API responses, and generics
• Use of the type system to improve refactoring safety and AI-generated code validation

API Integration

• Experience with React Query / TanStack Query, SWR, Axios, or similar
• Solid understanding of caching, loading states, optimistic updates, and error handling
• Experience collaborating with backend engineers

AI Coding Tools

• Demonstrable daily use of AI-assisted tools for generating components, refactoring, and scaffolding
• Strong review skills for AI-generated output

Modern CSS & Styling

• Proficiency with Tailwind CSS, CSS Modules, Styled Components, or similar
• Ability to build responsive, consistent UIs without relying on pixel-perfect mocks

Testing

• Habit of writing component and integration tests
• Understanding what to test: user flows, async logic, edge cases

Build Tooling & DX

• Comfortable with Vite (preferred) or Webpack
• Experience with ESLint, Prettier, and monorepo setups if needed
• Ability to maintain fast, reliable developer workflows

Nice to Have

• Experience analyzing legacy PHP-rendered frontend (server-side templates, jQuery, vanilla JS) for migration
• Experience building design systems or shared component libraries (Storybook)
• Authentication & authorization UI (OAuth/OIDC, token handling, role-based UI)
• React performance optimization (code splitting, virtualization, memoization, Web Vitals)
• Frontend CI/CD (preview deployments, build caching, visual regression testing)
• Mentoring and enabling AI-driven frontend development practices

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 platform standards and patterns across the organization by supporting engineering teams, improving documentation, and establishing clear migration guides
• Champion engineering best practices around build tooling, testing strategies, and frontend architecture
• Support product teams in adopting new platform capabilities — module federation, transport APIs, shared runtime modules

Innovation

• Stay ahead of industry trends in frontend infrastructure, build systems, and developer tooling
• Leverage GenAI to accelerate platform work — build intelligent agents, migration tools, codemods, and automation that help engineers work more efficiently
• Continuously push the stack forward — modernize React to the latest version, evolve build tooling, and improve developer experience across the ecosystem

Our stack

• JavaScript/TypeScript
• Event Sourcing
• React
• Redux
• Redux-saga
• Styled-components
• Webpack
• Jest/testing-library, playwright

About you

• Frontend infrastructure and build systems: Deep expertise in TypeScript, React, and modern build tooling (Webpack, Rspack, or similar bundlers)
• Platform team experience: Prior experience as a member of a frontend platform, infrastructure, or developer tools team — this is not an application feature team. You should have built and shipped tooling, frameworks, or libraries that other engineering teams depend on to do their work.
• Library authorship: Experience authoring and publishing packages consumed by multiple teams — not just contributing to a shared codebase, but owning a product (libraries, SDKs, developer tools) whose consumers are other engineers
• Large-scale migrations: Hands-on experience executing application-wide or multi-repo codemods, framework upgrades, or foundational API changes — you understand the coordination, tooling, and rollout strategies that make them succeed
• Microfrontend architecture: Familiarity with Module Federation, modularization patterns, or large-scale frontend architectures
• Testing and quality: Comfortable with testing strategies across the stack (unit, integration, e2e) and performance instrumentation
• Communication and influence: Ability to coordinate platform changes across consuming teams, write clear migration guides, and collaborate effectively with engineers across the organization
• AI fluency: Willingness to leverage AI tools in your workflow — from code generation to migration automation — and explore how AI can enhance developer experience

What makes you successful

• 8+ years in software engineering with strong frontend and infrastructure expertise
• You've produced platform infrastructure — not just maintained a large application. You understand the difference between building features and building the foundations others build features on.
• Extreme ownership mindset — you drive platform initiatives from design through implementation to adoption across the organization
• Comfort working across both legacy and modern codebases — you can navigate older patterns while driving toward better ones
• You're comfortable in remote, distributed environments and communicate effectively across time zones

Nice to have

• Experience with pnpm workspaces, Nx, or monorepo tooling at scale
• Background with Biome, SWC, or modern JavaScript toolchain evolution
• Contributions to open-source frontend infrastructure or build tools
• Experience leveraging AI tools to accelerate migration and platform work

Benefits

• Remote-first approach with the option for hybrid work from our offices in Kyiv, Warsaw, and Lisbon.
• We value long-term collaboration, whether through typical employment contract, employment of record or B2B arrangements. Be aware that contract type and benefits vary by location - feel free to clarify with our recruiters.
• Work schedule aligned with EU time zones.
• Honest, open culture that values constructive feedback.
• Professional and personal development within a collaborative, supportive team.
• Stable yet growing SaaS product offering an agile environment, ownership, start-up energy, and strong technical challenges.

Company Overview

PandaDoc empowers more than 67,000 growing organizations to thrive by taking the work out of document workflow. PandaDoc provides an all-in-one document workflow automation platform that helps fast scaling teams accelerate the ability to create, manage, and sign digital documents including proposals, quotes, contracts, and more. For more information, please visit https://www.pandadoc.com.

Company Culture
We're known for our work-life balance, kind co-workers, & creative virtual team-bonding events. And although our Pandas are located across the globe, we stay connected with the help of technology and ensure that everyone on our team feels, well, like a team. Pandas work best when they're happy. We retain our talent by upholding our values of integrity & transparency, and selling a product that changes the lives of our customers. Our attainment of awards such as Best Workplace, Best StartUp Employer and a Stevie Award for Best Employers demonstrate our commitment to our culture.

Check out LinkedIn to learn more.

PandaDoc is an Equal Opportunity Employer. We are committed to equal treatment of all employees without regard to race, national origin, religion, gender, age, sexual orientation, veteran status, physical or mental disability or other basis protected by law.

EXTERNAL RECRUITERS
Approval Requirement
Using external recruiters/staffing agencies requires prior approval from our HR Team. The HR Team at PandaDoc requests that external recruiters/staffing agencies not to contact PandaDoc employees directly in an attempt to present candidates. Complying with this request will be a factor in determining future professional relationships with PandaDoc.