Lead Fullstack Engineer (React+Next.js)

Nix; United States; Hybrid; USD 140,000 - 190,000; Full time

Benefits offered by this job

Flexible working format

Competitive compensation package

Personalized career growth

Mentorship program and tech talks

Education reimbursement

Team events and community involvement

Job summary

We are looking for a Senior Full-Stack Engineer to join a team building a modern, large-scale platform powering intelligent agreement management for millions of users worldwide. The role focuses on high-performance frontend solutions while contributing to backend services in a distributed SaaS environment.

The team builds a unified, widget-based frontend architecture with micro-frontends and scalable engineering practices, enabling AI-powered workflows across document creation, sending, signing,

Qualifications

• 8+ years of professional software development experience.
• Strong expertise with TypeScript and React.
• Hands-on experience with Node.js, Express, and modern backend development.
• Experience building reusable frontend components, design systems, or shared libraries.
• Solid understanding of frontend testing practices and tools.
• Experience working on large-scale SaaS products.
• Knowledge of REST APIs and modern web architecture.
• Excellent communication skills and ability to collaborate effectively in distributed teams.

Responsibilities

• Design and build scalable, reusable UI components and frontend solutions using React and TypeScript.
• Develop and maintain backend services using Node.js and Express.
• Contribute to a modern micro-frontend architecture and shared platform capabilities.
• Collaborate with cross-functional teams to deliver high-quality features in a fast-paced SaaS environment.
• Write well-tested, maintainable code and contribute to a strong engineering culture.
• Improve performance, reliability, observability, and security across the platform.
• Participate in the entire software development lifecycle, including architecture discussions, implementation, testing, CI/CD, and production releases.

Skills

TypeScript

React

Node.js

Express

Design systems

Frontend testing

REST APIs

Tools

Next.js

Azure DevOps

Job description

We are looking for a talented Senior Full-Stack Engineer to join a team building a modern, large-scale platform that powers intelligent agreement management experiences for millions of users worldwide. Our platform is at the heart of a global SaaS product used by more than 1.7 million organizations across 180+ countries. The team develops a unified, widget-based front-end architecture that enables seamless experiences across document creation, sending, signing, and management. By combining scalable engineering practices with AI-powered workflows, we are transforming the way businesses manage their most important agreements. As a Senior Engineer, you will play a key role in designing and developing high-performance, reusable frontend solutions while contributing to backend services and platform capabilities. You will work on complex engineering challenges involving micro-frontends, scalability, reliability, security, and developer productivity.

Responsibilities:

• Design and build scalable, reusable UI components and frontend solutions using React and TypeScript.
• Develop and maintain backend services using Node.js and Express.
• Contribute to a modern micro-frontend architecture and shared platform capabilities.
• Collaborate with cross-functional teams to deliver high-quality features in a fast-paced SaaS environment.
• Write well-tested, maintainable code and contribute to a strong engineering culture.
• Improve performance, reliability, observability, and security across the platform.
• Participate in the entire software development lifecycle, including architecture discussions, implementation, testing, CI/CD, and production releases.

Requirements:

• 8+ years of professional software development experience.
• Strong expertise with TypeScript and React.
• Hands-on experience with Node.js, Express, and modern backend development.
• Experience building reusable frontend components, design systems, or shared libraries.
• Solid understanding of frontend testing practices and tools.
• Experience working on large-scale SaaS products.
• Knowledge of REST APIs and modern web architecture.
• Excellent communication skills and ability to collaborate effectively in distributed teams.

Nice to Have:

• Experience with Next.js.
• Hands-on experience with micro-frontend architecture.
• Experience with gRPC and API integrations.
• Knowledge of JSON Schema or XML Schema.
• Experience with CI/CD pipelines and Azure DevOps.
• Familiarity with Agile and Test-Driven Development practices.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers