Senior Full-Stack Engineer — Remote, API‑Driven Back End

NinjaOne; Maine; Hybrid; USD 150,000 - 200,000; Full time

Benefits offered by this job

Hybrid remote work

Medical, dental, and vision insurance

401(k) plan

Unlimited PTO

Growth opportunities

Job summary

NinjaOne is seeking a Senior Full Stack Software Engineer to join our Emerging Products team. This role focuses on backend development with Java/Kotlin and working proficiency in React/TypeScript to build new products from the ground up.

You will design scalable APIs, implement API-first services, and craft data-driven dashboards while adhering to front-end architecture and data-flow patterns. Collaboration with data platform, reporting, and design teams is essential.

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, Information Technology, or equivalent work experience.
• 10+ years of software development experience building production applications, with strong experience in Java.
• 4+ years of experience working with highly scalable software systems.
• Strong understanding of OOP design principles, data structures, and object-oriented design.
• Knowledge of API best practices and experience developing REST / GraphQL services. gRPC experience is a plus.
• Comfortable writing, analyzing, and troubleshooting SQL with experience in relational database design and development.
• Expert knowledge of software quality and testing practices, including unit, integration, API, and front-end testing.
• 2+ years of experience with React and modern front-end application development.
• Strong TypeScript/JavaScript fundamentals, including using TypeScript to establish maintainable, reusable contracts and clear boundaries across components, APIs, and application layers.
• Strong understanding of HTML, CSS, browser fundamentals, and accessibility, beyond simply working within a React framework.
• Experience building reusable React components and working within established front-end architectures and data-flow patterns.
• Ability to debug and troubleshoot front-end issues, including rendering, network, state-management, and browser-related problems.
• Strong written and verbal communication skills.
• Experience leveraging AI tooling to accelerate software development.

Responsibilities

• Design and build the API and serving layer that powers data-intensive product experiences, using REST and/or GraphQL APIs to efficiently expose data, insights, and analytics to applications.
• Develop highly scalable backend services using Java and Kotlin, with a focus on API-first architecture, performance, reliability, and extensibility.
• Build new data-driven product experiences that transform large volumes of operational and analytical data into actionable insights, scoring, dashboards, and customer workflows.
• Design and optimize data access patterns across APIs, relational databases, caching layers, and analytical data sources to support enterprise-scale workloads.
• Build and maintain React/TypeScript user experiences, including dashboards, forms, workflows, status indicators, and drill-down experiences, while contributing to reusable components and established frontend architecture and data-flow patterns.
• Establish clear and maintainable contracts and boundaries between frontend applications, APIs, and backend services.
• Participate in architecture and design reviews as we take new products from early-stage development through general availability and enterprise scale.
• Identify and solve performance and scalability bottlenecks across backend services, APIs, databases, data access patterns, and front-end applications.
• Troubleshoot complex production issues across the full technical stack using logs, metrics, traces, query analysis, browser debugging, and other observability tools.
• Instrument front-end applications with appropriate observability and telemetry to understand errors, performance, and customer experience in production.
• Leverage AI-assisted development tools and techniques to improve engineering productivity and accelerate product development.
• Participate in code reviews, document technical decisions and processes, and contribute to cross-team engineering initiatives.
• Take ownership of features end-to-end—from architecture and implementation through testing, deployment, monitoring, and production troubleshooting.
• Other duties as needed.

Skills

Java

Kotlin

React

TypeScript

REST/GraphQL

SQL

OOP design

Observability

AI tooling

Frontend architecture

Education

Bachelor's degree in Computer Science or related field

Tools

React

GraphQL

SQL

REST APIs

gRPC

Job description

NinjaOne is seeking a Senior Full Stack Software Engineer to join our Emerging Products team. This role focuses on backend development with Java/Kotlin and working proficiency in React/TypeScript to build new products from the ground up.

You will design scalable APIs, implement API-first services, and craft data-driven dashboards while adhering to front-end architecture and data-flow patterns. Collaboration with data platform, reporting, and design teams is essential.