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$48K

$111.8K

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How much do koa software developer jobs pay per year?

As of Jun 4, 2026, the average yearly pay for koa software developer in the United States is $111,845.00, according to ZipRecruiter salary data. Most workers in this role earn between $90,000.00 and $130,000.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Koa Software Developer, and why are they important?

To thrive as a Koa Software Developer, you need strong proficiency in JavaScript (particularly Node.js), understanding of asynchronous programming, and experience with RESTful API development. Familiarity with Koa.js, related middleware, and version control systems like Git is typically required, along with knowledge of testing frameworks and possibly containerization tools like Docker. Problem-solving ability, attention to detail, and effective communication are essential soft skills for collaborating with teams and debugging complex issues. These skills ensure robust, scalable, and maintainable backend solutions that meet project requirements efficiently.

What are some common challenges Koa Software Developers face when working on large-scale applications?

Koa Software Developers often encounter challenges such as managing complex middleware flows, ensuring optimal performance, and maintaining code clarity as applications scale. Since Koa is unopinionated and lightweight, developers must make crucial architectural decisions, including error handling and routing strategies, which can become more complex in larger projects. Collaborating closely with frontend teams and DevOps specialists is also vital to ensure smooth integration and deployment, as Koa applications are frequently part of broader microservices or cloud-based systems.

What is a Koa Software Developer?

A Koa Software Developer is a programmer who specializes in building web applications and APIs using the Koa.js framework, which is a lightweight and expressive middleware framework for Node.js. Koa is known for its modular design and the use of modern JavaScript features like async/await for efficient asynchronous programming. Koa Software Developers typically create server-side applications, RESTful APIs, and microservices, ensuring scalable and maintainable code. They are also familiar with JavaScript, Node.js, and common web development tools and practices.
Infographic showing various Koa Software Developer job openings in the United States as of May 2026, with employment types broken down into 17% Internship, 3% Full Time, 2% Temporary, 66% Contract, and 12% Nights. Highlights an 80% Physical, 5% Hybrid, and 15% Remote job distribution, with an average salary of $111,845 per year, or $53.8 per hour.

Senior React + Node Engineer (Financial background) - Remote - USA

FullStack

Remote

$125.40K - $165.30K/yr

Full-time

Posted 23 days ago

Job description

Job Summary:
FullStack is one of the fastest-growing software consultancy companies in the Americas, delivering transformational digital solutions to top global companies and Silicon Valley startups. They are seeking a Senior React + Node Engineer with a financial background to integrate into client teams or work on FullStack product teams, focusing on building and delivering software solutions.
Responsibilities:
• You will integrate directly into our client's team and work alongside their existing designers and engineers daily.
• You will work on a FullStack product team to build and deliver a product to our clients.
Qualifications:
Required:
• 5+ years of professional software engineering experience.
• Advanced English is required.
• Successful completion of a four-year college degree is required.
• Expertise in Node.js (specifically versions 18 through 22).
• Proficient in React, including hooks, state management (Redux/Redux Saga), and component architecture.
• Proven experience in designing and maintaining financial data reconciliation systems, with a focus on ledger accuracy, complex data aggregation, and the programmatic generation of audit-ready reports.
• Track record of designing and maintaining microservices and distributed systems.
• Extensive experience with PostgreSQL, including advanced SQL, schema design, and query optimization.
• Well-versed in REST API development using modern frameworks like Koa.js or Express.
• Deep experience in ORM tools such as Objection.js, Sequelize, or TypeORM.
• Hands-on experience with AWS services (S3, SQS, RDS, EC2).
• Solid background in containerization using Docker and Docker Compose.
• Demonstrated experience with CI/CD pipelines (CircleCI, GitHub Actions) and GitOps practices.
• Skilled at implementing authentication systems such as JWT, OAuth, or MSAL (Azure AD).
• Strong history of testing discipline using Jest, Mocha, or Supertest.
• Practical experience with APM tools like DataDog or New Relic and feature flag management (LaunchDarkly).
• Solid understanding of financial or accounting systems (ledgers, reconciliation, etc.) is a plus.
• Ability to work through new and difficult issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of applications.
• Forensic attention to detail.
• A positive mindset and a can-do attitude.
• Experience working on Agile/Scrum teams.
• Meaningful experience working on large, complex systems (50k+ lines of code).
• Ability to take extreme ownership over your work. Every day is a challenge to ensure you are performing to the expectations you and your team have agreed upon.
• Ability to identify with the goals of FullStack's clients, and dedicate yourself to delivering on the commitments you and your team make to them.
• Ability to consistently work 40 hours per week.
Preferred:
• We’re Seeking Engineers Who Are AI-enthusiastic In Their Workflow. Professional Experience Or Personal Project Work With The Following Is a Significant Plus
• Cursor, Windsurf, or Google Antigravity.
• Claude Code, Gemini CLI, Codex, or Copilot CLI.
Company:
FullStack is a leading software engineering and AI solutions company helping organizations modernize, innovate, and scale through intelligent technology and world-class AI-ready talent across the Americas. Founded in 2013, the company is headquartered in Brentwood, Tennessee, US, , with a team of 501-1000 employees. The company is currently Late Stage.

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