Senior Full Stack Engineer – React,Java & AI/ML

Synapse Business Systems Inc.; Almont (CO); Remote; USD 130,000 - 170,000; Full time

Job summary

Synapse Business Systems Inc. is seeking a Senior Full Stack Engineer to drive modern, responsive web applications from the frontend using React and Next.js to the backend with Java and Spring Boot. You will integrate AI/ML features and work across cross-functional teams to deliver secure, scalable enterprise solutions.

The role emphasizes hands-on development, API design, and performance optimization in a remote, fast-paced environment with Agile/Scrum practices.

Qualifications

• 8 years of full stack software engineering experience.
• Hands-on front-end development with React and modern JavaScript.
• Experience with Next.js, reusable components, responsive design and UI performance.
• Backend experience with Java, Spring Boot, RESTful APIs, microservices, SQL and PostgreSQL.
• Experience implementing AI/ML or Generative AI in production.
• Familiarity with AI integration patterns like LLM APIs, RAG, vector search, prompts.
• GraphQL experience is a plus.
• Strong troubleshooting, communication, and Agile/Scrum skills.

Responsibilities

• Design and develop modern, responsive web applications using React, JavaScript, HTML, CSS, and Next.js.
• Build reusable UI components and ensure consistent, accessible UX across apps.
• Develop and enhance backend services with Java, Spring Boot, REST APIs, microservices, SQL, PostgreSQL.
• Integrate AI/ML and Generative AI capabilities into enterprise apps including model/LLM integrations.
• Collaborate with product, design, architecture and engineering teams to deliver secure, scalable solutions.
• Engage in API design, troubleshooting, code reviews, testing and performance optimization.
• Follow clean-code, modern architecture, security and Agile delivery practices.

Skills

React

Next.js

Java

Spring Boot

REST APIs

Microservices

SQL

PostgreSQL

AI/ML

Generative AI

GraphQL

UI performance

Agile/Scrum

Troubleshooting

Job description

Title: Senior Full Stack Engineer — React, Java & AI/ML

Location: Remote

We are seeking a Senior Full Stack Engineer with strong expertise in modern React-based UI development and hands-on experience delivering AI/ML-enabled enterprise applications. This position is ideal for an engineer who can build polished, scalable front-end experiences while contributing to Java-based backend services and AI-powered features.

Key responsibilities

• Design and develop modern, responsive web applications using React, JavaScript, HTML, CSS, and Next.js.

• Build reusable UI components and maintain consistent, accessible user experiences across applications.

• Develop and enhance backend services using Java, Spring Boot, REST APIs, microservices, SQL, and PostgreSQL.

• Integrate AI/ML and Generative AI capabilities into enterprise applications, including model or LLM integrations, intelligent workflows, and AI-driven user experiences.

• Collaborate with product, design, architecture, and engineering teams to deliver secure, scalable, maintainable solutions.

• Participate in API design, application troubleshooting, code reviews, testing, and performance optimization.

• Follow clean-code, modern architecture, security, and Agile delivery practices.

Required qualifications

• 8 years of full stack software engineering experience.

• Strong recent hands-on experience developing front-end applications with React and modern JavaScript.

• Experience with Next.js, reusable component development, responsive design, and UI performance optimization.

• Solid backend development experience with Java, Spring Boot, RESTful APIs, microservices, SQL, and PostgreSQL.

• Demonstrated experience implementing AI/ML or Generative AI solutions within production or enterprise applications.

• Familiarity with AI integration patterns such as LLM APIs, RAG, vector search, prompt workflows, model inference, or AI-assisted automation.

• Experience working with GraphQL is preferred.

• Strong troubleshooting, debugging, communication, and Agile/Scrum delivery skills.

Ideal candidate profile

The strongest candidates will have a frontend-first React background combined with real hands-on experience building AI-enabled functionality. They should be able to clearly explain the AI use case, their personal technical contribution, the architecture, integrations, security considerations, and business outcome.