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React Full Backend Frontend Python Node Java Jobs in Illinois

Agent Engineer (Langchain)

Chicago, IL · On-site

$120K - $175K/yr

You've worked across multiple languages or frameworks (e.g., Python, Node, Java, React, Next.js ... Built and deployed a full stack GenAI MVP with a React frontend and FastAPI backend * Facilitated ...

React JS with Azure

Chicago, IL

$56.75 - $70.25/hr

The ideal candidate is a ReactJS frontend engineer with Azure cloud deployment expertise who can ... React and Python/Node apps. • Helm - templating Kubernetes manifests for multi-environment ...

Developer - Java with MERNSTACK

Chicago, IL

$54 - $69.75/hr

Will you be able to share JAVA+MERN (MongoExpress React Node) stack profiles We are looking for a ... the backend and MERN (MongoDB, Express.js, React.js, Node.js) stack for the frontend.

Fullstack Developer (Node JS + React JS) Location: Chicago, IL About Us: For the past 20 years, we ... Experience with various backend frameworks (e.g., Express, NestJS). Experience with front-end ...

ReactJS with Azure developer

Chicago, IL · On-site

$56.75 - $70.25/hr

... React and Python/Node apps. • Helm -- templating Kubernetes manifests for multi-environment ... frontend hosting. • Azure Kubernetes Service (AKS) -- deploying containerized apps. • Azure ...

... full-stack features across account, authentication, and loyalty applications (Node, React, Java ... Participate in frontend and backend full-stack development using current frameworks * Support API ...

New

... or Java Front End PM. Required Skills set: * 10+ years experience of IT Development * Node JS ... Java Full Stack Developer or Java Back End Developer. But Java Full Stack with NodeJS as ...

IL · On-site

$110K - $150K/yr

Full Stack Developer (Frontend Emphasis) Location: Hybrid, Scott AFB, IL Clearance Level: Secret ... Integrate React applications with Java and .NET backend services and RESTful APIs. * Build ...

Java Angular

Chicago, IL · On-site

$54 - $69.75/hr

4 Full Stack Engineers (React or Angular, Java/Spring, AWS), Capital One/Chicago, Hybrid, CTH - GC ... Full stack, mostly back end but do need hands on UI skills as well (70% back end) * Tech Stack

Java Fullstack Developer

Chicago, IL · On-site

$54 - $69.75/hr

The ideal candidate will have strong expertise in Java-based back-end development and React-based front-end development. You will be responsible for designing, developing, and maintaining full-stack ...

ReactJS with Azure develope

Chicago, IL

$56.75 - $70.25/hr

The ideal candidate is a ReactJS frontend engineer with Azure cloud deployment expertise who can ... React and Python/Node apps. • Helm - templating Kubernetes manifests for multi-environment ...

... backend, frontend, integration, DevOps, analytics) * Strong programming background in modern languages (e.g., PHP, Python, Java, Node.js, JavaScript) and familiarity with frontend frameworks (React ...

Java Full Stack Developer (W2)

Chicago, IL

$54 - $69.75/hr

Key Responsibilities · Design, develop, and deploy scalable backend microservices using Java (11 ... Front-end development experience using Angular or React · (Angular preferred for operational UI ...

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React Full Backend Frontend Python Node Java information

How do React Full Backend Frontend Python Node Java developers typically collaborate within cross-functional teams?

Developers proficient in React, Python, Node.js, and Java often work within agile, cross-functional teams that include designers, testers, and product managers. They regularly participate in code reviews, sprint planning, and daily stand-ups to align on project goals and ensure smooth communication. Collaboration is key, as they must integrate frontend components with backend services, troubleshoot issues collectively, and adapt to evolving project requirements. Being open to feedback and proactively sharing knowledge are common expectations, making teamwork a central part of the role.

What does a React Full Backend Frontend Python Node Java developer do?

A React Full Backend Frontend Python Node Java developer is a versatile software engineer skilled in both front-end and back-end technologies. They use React for building interactive user interfaces, Python and Java for server-side logic, and Node.js for back-end runtime environments. These developers handle the complete software development lifecycle, including designing, coding, testing, and deploying applications. Their broad skill set allows them to work on various layers of a web application, ensuring seamless integration between the client and server sides. This role is essential for companies looking for end-to-end solutions from a single developer or team.

What is the difference between React Full Backend Frontend Python Node Java vs React Frontend Developer?

AspectReact Full Backend Frontend Python Node JavaReact Frontend Developer
Required SkillsReact, backend languages (Python, Node, Java), database knowledgeReact, HTML, CSS, JavaScript
Work EnvironmentFull-stack development, both frontend and backend tasksPrimarily frontend UI/UX development
CertificationsOften no formal certification, but full-stack courses helpReact certifications or JavaScript courses
Industry UsageUsed in full-stack roles across tech companies, startupsUsed mainly in frontend-focused roles in web development

React Full Backend Frontend Python Node Java roles involve both frontend and backend development, requiring knowledge of multiple programming languages and database management. React Frontend Developers focus mainly on creating user interfaces with React and related technologies. The full-stack role offers broader responsibilities, while frontend roles specialize in UI/UX design and implementation.

What are the key skills and qualifications needed to thrive as a Full Stack Developer (React, Python, Node, Java), and why are they important?

To thrive as a Full Stack Developer, you need strong proficiency in front-end frameworks like React and backend languages such as Python, Node.js, and Java, often backed by a degree in computer science or related field. Familiarity with version control systems (like Git), databases (SQL/NoSQL), RESTful APIs, and deployment tools is typically required. Problem-solving, effective communication, and adaptability are vital soft skills for excelling in cross-functional development teams. These competencies enable developers to build robust, scalable applications and collaborate efficiently throughout the software development lifecycle.
What job categories do people searching React Full Backend Frontend Python Node Java jobs in Illinois look for? The top searched job categories for React Full Backend Frontend Python Node Java jobs in Illinois are:
What cities in Illinois are hiring for React Full Backend Frontend Python Node Java jobs? Cities in Illinois with the most React Full Backend Frontend Python Node Java job openings:

Agent Engineer (Langchain)

Focused

Chicago, IL • On-site

$120K - $175K/yr

Other

Posted 4 days ago


Job description

Who we are:

At Focused, we move quickly to deliver quality software that achieves client outcomes and meets their customer's needs. We strategically partner with our clients to leverage our expertise in design and software, while our clients bring their own domain expertise. We work with a variety of clients from different industries, collaborating as we get new products to market, modernizing legacy systems, or helping teams learn the skills they need to be successful.   

Our values:

  • Listen first We are experts in product practices but life long learners in the domain of our customers. We research, collaborate, and understand. 
  • Learn why We ask questions and talk to users to understand problem spaces, objectives, and goals, which allows us to deeply invest and drive towards the outcomes of our clients. 
  • Love your craft We love diving into a variety of domains and solving problems.  We take pride in delivering value, in communicating progress, and guiding our clients to success.

At Focused, our Engineers are both practitioners and experts in their craft. This role would play a crucial role in shaping and implementing engineering best practices and ensuring the successful delivery of complex software projects. With clients, we develop trust and influence - we are unintimidated and unintimidating. With colleagues, we set the standard for how we deliver success for clients.

What would you be doing?

  • Build AI-enabled applications leveraging LangChain and LLMs to deliver meaningful, production-ready outcomes for clients.
  • Deep expertise in LangChain, LangGraph and LangSmith.
  • Lead teams through end-to-end delivery across the stack, from backend services to modern web UIs.
  • Pair program daily with teammates and clients to share knowledge, improve code quality, and grow together.
  • Practice TDD and continuous refactoring to ensure code is reliable, maintainable, and understandable.
  • Guide architecture decisions to support scalability, observability, and performance.
  • Collaborate closely with designers, product managers, and stakeholders to continuously deliver valuable software.
  • Coach developers on the team through pairing, mentoring, and modeling healthy engineering culture.
  • Influence technical direction beyond the team, working across client orgs and Focused's internal practices to share lessons, shape approaches, and raise the collective bar.
  • Stay curious through experimenting with new patterns in the GenAI space, share what works (and what doesn't), and help evolve how we build AI-powered software.
We are excited about you, because you:
  • You're a hands-on, full stack engineer with a strong track record of delivering software in collaborative, agile environments.
  • You've worked with LangChain (or similar agentic frameworks), and understand how to architect AI-native systems responsibly and effectively.
  • You believe that code quality matters, and that TDD and pairing help build better systems and stronger teams.
  • You've worked across multiple languages or frameworks (e.g., Python, Node, Java, React, Next.js) and are pragmatic about tool selection.
  • You're excited about what's happening in the AI space but stay focused on delivering value.
  • You have experience navigating complex organizations, building bridges across functions, and helping teams adopt modern development practices.
  • You're as comfortable in the code as you are in a client meeting and can translate technical risks and wins into language anyone can understand.
  • You love to share what you're learning and make the team around you better.

If you had worked at Focused over the last 3 months you may have:

  • Paired with a teammate to build a document Q&A system using LangChain and OpenAI APIs
  • Helped design an architecture that integrates LLM agents into a legacy enterprise workflow
  • Refactored a flaky test suite to support continuous delivery with confidence
  • Built and deployed a full stack GenAI MVP with a React frontend and FastAPI backend
  • Facilitated an architecture spike to evaluate vector database options for semantic search
  • Contributed a new section to our internal AI playbook
  • Helped write this job req

What to know before you apply: 

  • This role will require being in the Chicago office three days per week and up to 20% travel within the United States.
  • Focused is unable to sponsor or take over sponsorship of the employment Visa process at this time.
  • The Chicago base salary range for this role is $120,000 - $175,000.