Senior Full Stack Software Engineer

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.

As a Full Stack Engineer at Katana, you won't just write code — you'll shape the future of decentralized finance. We're looking for a seasoned builder with both frontend finesse and backend backbone to help bring our Core and Composable Apps to life. From sleek UIs to seamless blockchain integrations, you'll craft intuitive experiences that empower users to explore the DeFi frontier - without the friction.

If you're a DeFi-native with a hunger for impact, and thrive in the breakneck rhythm of web3 innovation, this is your arena.

• Build the Future of DeFi: Architect, develop, and maintain powerful web applications integrated with Katana's cutting-edge Layer 2 blockchain infrastructure.

• Design with Empathy: Create beautiful, responsive interfaces that simplify complex DeFi concepts for real-world users.

• Engineer the Backbone: Develop robust backend systems and APIs that interact with smart contracts, manage blockchain data, and scale to meet user demand.

• Collaborate Across the Stack: Partner closely with protocol and smart contract engineers to bring DeFi primitives (AMMs, lending, farming, and more) to the frontend in seamless, elegant ways.

• Tame the Blockchain Firehose: Optimize data pipelines and application performance to handle high-throughput activity and real-time blockchain data.

• Secure the Edge: Implement wallet connections, authentication flows, and security best practices that users can trust.

• Stay on the Edge: Keep tabs on the latest developments in DeFi, Layer 2 scaling, and the ever-evolving web3 landscape - and bring those insights back to the product.

• Full-Stack Fluency: 6–8+ years of experience building full-stack web applications — from polished frontends to production-grade backends.

• Web3 Warrior: 4+ years hands-on with blockchain protocols, smart contracts, or web3 dev tools.

• Frontend Firepower: Deep expertise with modern JS frameworks like React, , or

• Backend Mastery: Comfortable with , REST APIs, microservices, and containerized stacks (Docker, Kubernetes).

• Database Dexterity: You speak fluent SQL (Postgres, MySQL) and NoSQL (MongoDB, Firestore).

• Smart Contract Savvy: Able to read Solidity, integrate EVM-based contracts, and understand core blockchain concepts.

• Team-First Mentality: Proven success in agile teams, with a passion for shipping fast and making data-driven decisions.

• Hands-on knowledge of intent-based bridging, solver networks, and advanced bridging layers.

• Deep familiarity with liquidity protocols, yield optimization strategies, and the nuances of great DeFi UX.

• Performance-tuning wizardry and a security-first mindset.

• Clear communicator with a love for collaboration.

• 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

Katana 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. Katana 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..