[Hiring] Senior Backend Software Engineer @Dynamic

Dynamic; United States; Remote; USD 120,000 - 160,000; Full time

Job summary

A leading company in fintech is seeking a Senior Backend Software Engineer to build scalable and secure infrastructure for wallet-based applications. This role involves designing APIs, implementing security measures, and collaborating with cross-functional teams to enhance product reliability and performance.

Qualifications

• 8 to 10 years of backend engineering experience.
• Highly proficient in Node.js, Express.js, and TypeScript.
• Experience designing and scaling production APIs.

Responsibilities

• Design and implement scalable backend systems and APIs.
• Build secure systems adhering to best practices.
• Collaborate with product and engineering teams.

Skills

Node.js

Express.js

TypeScript

Systems design

Authentication

Security

Encryption

Key management

Access control

Cryptographic principles

Job description

May 23, 2025 - Dynamic is hiring a remote Senior Backend Software Engineer. Location: USA.

We're seeking a Senior Software Engineer

Dynamic started with a simple vision: every app and website will have a wallet. Three years in, that vision is no longer just an idea. It’s happening now. Wallets are no longer just for crypto apps. They’re becoming the backbone of fintech, payroll, and global remittances. They power faster, cheaper, and more accessible transactions. The best crypto apps, like Ondo Finance, Story, and Magic Eden already run on Dynamic. Now, the world’s top fintech and HR platforms are integrating wallets and payments through Dynamic, tapping into crypto rails. We are at a pivotal moment as we scale from supporting leading crypto apps to becoming the wallet infrastructure of the internet.

Why join Dynamic now?

• Own the next wave of apps and fintechs: Your work will directly impact how the world’s biggest fintech players adopt wallets and stablecoin payments.

• Join at the perfect moment: We’re scaling fast, but still early enough that your contributions will define our trajectory.

• Build the foundation of modern money: Backed by a16z crypto, Founders Fund, and other top investors, we’re making money more connected across chains and ecosystems.

Our product:

Check out a product demo here

What we are looking for:

As a Senior Backend Engineer at Dynamic, you’ll play a key role in building scalable, secure infrastructure for authentication, identity, and wallet-based applications. You’ll be responsible for designing and maintaining core APIs, implementing secure systems, and collaborating closely with cross-functional teams to ensure product reliability and performance.

This role is ideal for someone who thrives in fast-paced environments and wants to make a meaningful impact across fintech and Web3. You’ll work with technologies like Node.js, Express.js, and TypeScript, and help define the architecture that enables wallets for millions of users.

You will be a fantastic fit for this role if:

• You have 8 to 10 years of backend engineering experience, with a strong focus on systems design, authentication, and security

• You’re highly proficient in Node.js, Express.js, and TypeScript

• You’ve designed and scaled production APIs, especially for identity, authentication, or payments-related systems

• You’re well-versed in encryption, key management, access control, and secure handling of sensitive data

• You’ve worked with authentication protocols (OAuth, JWT, etc.) and understand cryptographic principles

• You care deeply about quality, performance, and maintainability—and hold a high bar for production code

• You thrive in cross-functional environments and enjoy collaborating closely with product and design teams

• You’re excited about Web3 and fintech, and want to work on infrastructure used by millions of users

You will:

• Design and implement scalable backend systems and APIs to power authentication and wallet infrastructure

• Build secure systems that adhere to best practices in encryption, key management, and access control

• Collaborate with product and engineering teams to develop solutions that serve millions of users

• Improve infrastructure reliability, scalability, and performance across environments

• Contribute to architecture decisions and long-term backend strategy