Tech Lead

Full Stack Software Developer – Node.js & React
At Charles River, we are passionate about improving the quality of people’s lives. When you join our global family, you will help create healthier lives for millions of patients and their families. We empower innovative thinkers dedicated to continuous learning and improvement by equipping you with the tools to grow your career.
Job Summary
As a Full Stack Engineer at Charles River, you will help shape how users interact with our applications by designing and building cloud-native, modern web systems across the stack—from responsive user interfaces to resilient APIs and robust backend services. You will play a pivotal role in driving the architecture, scalability, and quality of digital solutions that support life-saving therapies.
Note: This role requires strong proficiency in Node.js and React. It is a fully remote position with occasional travel depending on business needs.
Essential Duties and Responsibilities
Design, develop, and deploy full stack applications using modern JavaScript frameworks (React, Node.js).
Build and maintain robust, scalable RESTful APIs and backend services.
Develop responsive and intuitive front-end UIs integrated with system APIs.
Ensure code adheres to industry best practices, coding standards, and is well-documented.
Write and maintain automated unit, integration, and end-to-end tests (Jest, Playwright, etc.).
Collaborate closely with cross-functional teams including Product, Design, and DevOps.
Architect and implement secure, performant systems using modern DevSecOps practices.
Refactor and modernize legacy systems while maintaining business continuity.
Stay up to date with advancements in web technologies, AI-assisted development tools, and industry trends.
Participate in code reviews, sprint planning, and retrospectives as part of an Agile team.
Job Qualifications
Bachelor’s degree in Computer Science, Engineering, Information Systems, or equivalent experience.
Proven experience with Node.js and React in building production-grade applications.
Proficiency in HTML/CSS/JavaScript, and experience with CSS preprocessors like SCSS/LESS.
Experience building and consuming RESTful APIs; GraphQL is a plus.
Knowledge of modern DevOps and CI/CD practices, cloud-native development, and containerization (Docker, Kubernetes).
Experience with datalayers (e.g., PostgreSQL, MongoDB, Redis).
Strong understanding of software architecture, SOLID principles, and security best practices.
Familiarity with observability tools (e.g., OpenTelemetry, Prometheus) and logging frameworks.
Experience integrating or utilizing AI/ML tools (e.g., GitHub Copilot, OpenAI API) is a plus.
Excellent problem-solving skills and ability to take ownership of features from design to deployment.
About Charles River
Charles River is an early-stage contract research organization (CRO) with over 20,000 employees across 110 facilities worldwide. We support pharmaceutical, biotech, and government partners with discovery and safety assessment services that accelerate the delivery of new therapies. Our work is responsible for supporting the development of 86% of the drugs approved by the FDA in 2021.
Equal Employment Opportunity
Charles River is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status

Employment type
Full-time

Work arrangement
Yes