Fullstack (React + Node) Engineer

Justjoin; United States; Hybrid; USD 120,000 - 170,000; Full time

Benefits offered by this job

Vacation days

Illness/special days off

Health and life insurance

English language classes

Learning platforms access

Flexible workplace

Mentoring program

Public speaking opportunities

Bench time

Certification reimbursement

Job summary

Justjoin is seeking a highly skilled Full-Stack Engineer to join a growing team supporting a leading U.S. education technology company.

You will design and build scalable backend and frontend solutions using modern JavaScript/TypeScript technologies, working across a cloud-native architecture with cross-functional teams. The role emphasizes ownership, high code quality, observability, testing, and CI/CD practices, with opportunities to influence architecture and contribute to products used by

Qualifications

• BS/MS in Computer Science or equivalent degree.
• 5+ years of professional software development experience.
• 5+ years of experience with NodeJS server-side development.
• 2+ years' experience with a modern frontend framework (e.g. React).
• Experience with Typescript.
• Experience with database technologies (ideally NoSql DBs and MongoDB).
• Experience with using and integrating the latest AI coding technologies: e.g. LLMs, Model Context Protocol, Claude Code, Github Copilot.
• Strong problem-solving ability and experience working within complex systems and large code bases.
• Strong communication and collaboration skills, and ability to work in a self-driven way.

Responsibilities

• Design, implement, and maintain scalable, high-performance solutions using JavaScript / TypeScript.
• Lead technical decisions in Node.js backend development and modern frontend frameworks (e.g. React).
• Identify and resolve performance, scalability, reliability, and security issues across complex systems.
• Participate in and drive code reviews, architectural discussions, and technical improvements.
• Improve system observability, monitoring, logging, and error handling.
• Ensure high code quality through testing, documentation, and CI/CD practices.

Skills

Node.js

React

TypeScript

Problem-solving

Communication

Education

BS/MS in Computer Science or equivalent degree

Tools

AWS

Terraform

Git

Job description

Technology stack

• Languages & Frameworks: Node.js, JavaScript, Python
• APIs: RESTful APIs, GraphQL
• Data Stores: PostgreSQL, DynamoDB, Snowflake
• Cloud & Infrastructure: AWS (AppSync, Lambda), Serverless, Terraform, Datadog
• Testing: Jest, WebDriver IO, automated testing practices

Client

Our client is a leading U.S. education company that has been transforming K–12 learning since 2000. They create next‑generation curriculum and formative assessment solutions, offering interactive products designed for both teachers and students. Their programs support learners from elementary through high school and are used in all 50 states, across 21,000+ schools, serving over 10 million students

Position overview

We are looking for a highly skilled Full‑Stack Engineer to join a growing team supporting a leading U.S. education technology company. In this role, you will design and build scalable, high‑performance backend and frontend solutions using modern JavaScript/TypeScript technologies. You will work across a cloud‑native architecture, collaborating with cross‑functional teams to solve complex technical challenges, improve system reliability, and drive technical excellence. This position is ideal for an engineer who enjoys ownership, thrives in active development environments, and is eager to contribute to impactful educational products used by millions of students nationwide.

Responsibilities

• Design, implement, and maintain scalable, high-performance solutions using JavaScript / TypeScript
• Lead technical decisions in Node.js backend development and modern frontend frameworks (e.g. React)
• Identify and resolve performance, scalability, reliability, and security issues across complex systems
• Participate in and drive code reviews, architectural discussions, and technical improvements
• Improve system observability, monitoring, logging, and error handling
• Ensure high code quality through testing, documentation, and CI/CD practices

Requirements

• BS/MS in Computer Science or equivalent degree
• 5+ years of professional software development experience
• 5+ years of experience with NodeJS server-side development
• 2+ years' experience with a modern frontend framework (e.g. React)
• Experience with Typescript
• Experience with database technologies (ideally NoSql DBs and MongoDB)
• Experience (professional or personal) with using and integrating the latest AI coding technologies: e.g. LLMs, Model Context Protocol, Claude Code, Github Copilot
• Strong problem-solving ability and experience working within complex systems and large code bases
• Strong communication and collaboration skills, and ability to work in a self-driven way

Nice to have

• Experience with DBT
• Experience with Snowpark
• Experience with Snowflake CLI
• Experience with Master Data Management design and integration
• Experience with data quality testing, validation, and reconciliation
• Experience writing technical documentation
• Investment banking or asset management domain knowledge
• Experience with Claude AI in SDLC
• Experience with multi agent communication security patterns
• Experience performing trust model assessments and gap analysis for agent ecosystems
• Experience with Cedar policy testing tools and policy validation frameworks
• Experience with AWS security testing and cloud security reviews
• Knowledge of AI security risks, including prompt injection, excessive agency, identity spoofing, and tool parameter exposure
• Experience with regulatory compliance validation and governance frameworks
• Understanding of enterprise audit, risk management, and security monitoring practices
• Experience working with large scale AI, cloud, or distributed platform environments

What We Offer:

• Vacation days: Up to 26 business days per year.
• 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types
• Health and life insurance (Luxmed)
• MyBenefit platform with Multisport option
• Internal psychological support service
• English language classes from the first working day
• Access to external learning platforms: O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training
• Flexible workplace: work from the office, from home, or choose a hybrid option
• Tech Skills Mentoring Program
• Opportunities to develop as a public speaker, mentor, or technical interviewer
• Fully paid idle (bench) when not involved in a project
• Certification reimbursement (AWS, GCP, Microsoft, etc.)