Senior 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 Senior Full Stack Engineer on the Applications team at Polygon Labs, you will shape the user and developer experience across our ecosystem. You will work on high-impact projects such as the Polygon Portal, Staking UI, and the Agglayer SDK, ensuring they are performant, intuitive, and developer-friendly.

This role is ideal for someone who thrives at the intersection of frontend engineering, blockchain technology, and developer tooling — and who is excited to help connect millions of users and developers to Polygon technology. You’ll join a collaborative, globally distributed team that values innovation, inclusivity, and delivering exceptional products.

Your Responsibilities

• Develop and ship new features for the Polygon Portal and Staking UI to enhance user and validator interactions.

• Build and maintain the Agglayer SDK to improve developer experience across connected chains.

• Improve observability and performance monitoring of frontend applications.

• Collaborate with the backend team to design and implement lightweight APIs when needed.

• Ensure code quality, maintainability, and scalability through best practices, reviews, and documentation.

What You'll Need

• 5+ Years of experience in developing user facing applications and backend services.

• 2–3 years of experience in web3 dApp and SDK development.

• Strong proficiency in TypeScript/JavaScript and frontend frameworks such as React.js and Next.js.

• Hands-on experience with web3.js, ethers.js, viem, or similar blockchain libraries.

• Ability to read Solidity code, understand smart contract logic, and interact with contracts programmatically.

Preferred Qualifications

• Experience with non-EVM blockchain environments.

• Rust development experience.

• Background in building blockchain indexers.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.

Learn More about Polygon Labs

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