Staff Full Stack Engineer, Applications

About Polygon Labs

Polygon Labs is a software development company building and developing a network of aggregated blockchains via the Agglayer, secured by Ethereum. As public infrastructure, the Agglayer will bring together user bases and liquidity for any connected chain, and leverage Ethereum as a settlement layer. Polygon Labs has also contributed to the core development of several widely-adopted scaling protocols and tools for launching blockchains, including Agglayer CDK, Polygon PoS & Katana.

Your Role

As a Full Stack Staff Engineer on the Applications and SDK Development team at Polygon Labs, you'll step into a mission-critical role where code meets creativity. You won’t just be writing software—you’ll be engineering the connective tissue of web3 experiences. From building intuitive bridge and staking interfaces to architecting powerful multi-chain SDKs, your work will power seamless interactions across the Polygon network. Think of this as your chance to shape the future of blockchain usability.

You’ll thrive here if you’re energized by technical challenges, obsessed with UX in the decentralized world, and eager to mentor a team of sharp minds. If you get a rush from delivering secure, scalable systems that millions rely on—this is the adventure for you.

Your Responsibilities

• Architect and build full-stack applications that talk to smart contracts and EVM chains—delivering snappy, intuitive web3 experiences.

• Take the reins on system design for dApps, multi-chain SDKs, and smart contract indexers spanning multiple Layer 2 networks.

• Champion best practices in code quality, scalability, and performance while tackling tech debt like a boss.

• Mentor a dynamic team of engineers and collaborate across disciplines—from Product to Security—to deliver resilient, future-ready solutions.

• Contribute to planning, sizing, and de-risking of complex projects with many moving parts.

• Keep a pulse on performance, security, and observability to ensure smooth sailing in production.

• Relentless commitment to quality – You champion a testing-first mindset and implement unit, integration, and end-to-end tests.

What You'll Need

• 6–8+ years of hands-on full-stack engineering experience, with deep roots in both frontend and backend.

• At least 4 years steeped in web3—building with blockchain protocols, smart contracts, and decentralized tooling.

• Mastery of modern JS/TS frameworks like React, Next.js, or Vue.js—your frontend skills should be second nature.

• Deep knowledge of databases, both SQL (Postgres) and NoSQL (Mongo, Firestore), and when to use which.

• Backend prowess with Node.js, REST APIs, and microservice architectures; experience with containers (Docker, Kubernetes) is a must.

• A solid grasp of Intent-Based Bridging and Solver Networks—bonus points if you’ve worked on them in production.

• Ability to read, understand, and integrate Solidity contracts into real-world applications.

• Proven success working in fast-moving, agile environments and collaborating across multiple teams to ship scalable systems.

Preferred Qualifications

• Experience building or scaling apps on Ethereum L2s.

• A design-first mindset and familiarity with prototyping for rapid iteration and user feedback.

• Passion for mentorship and a track record of helping senior engineers grow into leaders.

• Strong influence in setting technical direction and cross-team architectural decisions.

• Skilled communicator who builds bridges across engineering, product, and business.

• Knowledge of non-EVM ecosystems and proficiency in Rust development.

• Real-world experience writing Solidity smart contracts.

• Active contributor to open-source web3 projects—or better yet, a maintainer.

Polygon Labs Perks
The goal of the Polygon Labs total rewards program is to support the health and well-being of you and your family. Our comprehensive compensation plan includes the following benefits for our full time employees:

• Remote first global workforce

• Industry leading Medical, Dental and Vision health insurance*

• Company matching 401k with 3% match*

• $1,500 Home Office Set Up Allowance (life-time max)

• $200 Annual Book Allowance Program

• $75 Monthly internet or phone reimbursement

• Flexible Time Off

• 1 company wide wellness Friday day off per quarter

• Company issued laptop

• Egg freezing, mental health, and employee wellness benefits

*In certain countries medical, dental and vision is fully covered for employees & their dependents. This is country and plan specific.
*401k is for United States employees only

Polygon Labs is committed to a diverse and inclusive workplace and is an equal opportunity employer. We do not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status. Polygon Labs is committed to treating all people in a way that allows them to maintain their dignity and independence. We believe in integration and equal opportunity. Accommodations are available throughout the recruitment process and applicants with a disability may request to be accommodated throughout the recruitment process. We will work with all applicants to accommodate their individual accessibility needs.
If you think you have what it takes, but don't necessarily meet every single point on the job description, please still get in touch. We'd love to have a chat and see if you could be a great fit.