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

About FullStack

FullStack is one of the fastest-growing software consultancy companies in the Americas. We deliver transformational digital solutions to top global companies and Silicon Valley startups. As an employee-first company, we focus on hiring the most talented software designers and developers by creating a positive, respectful, and supportive work environment where they can achieve their greatest potential.

We're Looking To Hire

A Senior React + Node Engineer (Financial Background) to join our team. You'll work with our incredible clients in one of two ways:

• Team Augmentation: You will integrate directly into our client's team and work alongside their existing designers and engineers daily.
• Design & Build: You will work on a FullStack product team to build and deliver a product to our clients.

What We're Looking For

• 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.
• 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.

Nice To Have

• AI-enthusiastic in workflow (Cursor, Windsurf, Google Antigravity, Claude Code, Gemini CLI, Codex, Copilot CLI).

We Offer

• Competitive Salary.
• Paid Time Off (vacation, sick leave, parental leave, and holidays).
• The ability to work with leading startups and Fortune 500 companies.
• Health, dental, and vision insurance.
• 401(k) w/ 4% match.
• Ample opportunity for career advancement.
• Continuing education opportunities.

Benefits

• Flexible work schedule.
• Remote work option.

Pay

Competitive salary based on experience and qualifications.

Schedule

Flexible work schedule to accommodate your needs and the needs of your team.

Skills

• Node.js
• React
• PostgreSQL
• AWS services (S3, SQS, RDS, EC2)
• Docker and Docker Compose
• CI/CD pipelines (CircleCI, GitHub Actions)
• JWT, OAuth, or MSAL (Azure AD)
• Jest, Mocha, or Supertest
• DataDog or New Relic
• Forensic attention to detail
• Agile/Scrum teams
• Larger, complex systems (50k+ lines of code)
• Ownership over work

Qualifications

• 5+ years of professional software engineering experience.
• Advanced English proficiency.
• Successful completion of a four-year college degree.
• Expertise in Node.js (specifically versions 18 through 22).
• Proficiency in React, including hooks, state management (Redux/Redux Saga), and component architecture.
• 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.
• Experience in designing and maintaining microservices and distributed systems.
• Experience with PostgreSQL, including advanced SQL, schema design, and query optimization.
• Experience with REST API development using modern frameworks like Koa.js or Express.
• Experience with ORM tools such as Objection.js, Sequelize, or TypeORM.
• Experience with AWS services (S3, SQS, RDS, EC2).
• Experience with containerization using Docker and Docker Compose.
• Experience with CI/CD pipelines (CircleCI, GitHub Actions) and GitOps practices.
• Experience with authentication systems such as JWT, OAuth, or MSAL (Azure AD).
• Experience with testing discipline using Jest, Mocha, or Supertest.
• Experience with APM tools like DataDog or New Relic and feature flag management (LaunchDarkly).
• 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.
• Positive mindset and can-do attitude.
• 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.