Intern Java Back End Developer Jobs in Kansas City, MO

At weavix, the key to our growth is a high-performing Engineering team building products and solutions that solve real-world problems for mission-critical customers. We are seeking a Senior Software Engineer to help lead the development, optimization, and reliability of our mobile and web applications.

In this role, you will be a hands-on technical leader responsible for designing and delivering scalable, reliable, and high-quality application experiences across our TypeScript / JavaScript-based platform. You will bring strong experience in modern application development, particularly with React Native and Angular, and will help guide technical direction, improve engineering practices, and mentor other engineers.

We are looking for a motivated, results-oriented, quality-focused engineer who can operate across the application stack, make sound technical decisions, and take ownership of complex features from concept through production. This role will play a critical part in helping weavix scale quickly while ensuring our products remain reliable, usable, performant, and refined.

We are seeking a senior engineer focused on building, maintaining, and improving our Android application on weavix devices, as well as supporting related web and backend application experiences. Day-to-day responsibilities will include developing next-generation features, resolving complex customer issues, improving application performance and reliability, experimenting with new ideas, building proof of concepts, and helping establish scalable engineering patterns.

You will be proficient in developing React Native and Angular applications, optimizing features for performance and efficiency, diving deep into the codebase to diagnose and resolve issues, and creating reliable solutions for mission-critical customer environments. As a senior member of the team, you will also be expected to provide technical guidance, contribute to architecture decisions, and help raise the standard of engineering execution across the team.

• Develop next-generation mobile and web application features that address customer needs and market demand.
• Improve, maintain, and scale existing features that customers rely on every day.
• Lead root-cause analysis for reliability, performance, and customer-impacting issues.
• Improve the performance, efficiency, and stability of weavix devices, applications, and products.
• Provide technical leadership across application development, architecture, and engineering best practices.
• Help mentor engineers and promote a culture of quality, ownership, and continuous improvement.

• Design, develop, test, and maintain high-quality features across mobile and web applications.
• Lead development of new features based on mission-critical engineering specifications and customer requirements.
• Improve existing features for reliability, performance, scalability, and usability.
• Diagnose, root cause, and resolve issues in communication features and other core application workflows.
• Implement software patches, resolve bugs, investigate production issues, and integrate new functionality.
• Build scalable and reliable application experiences that can withstand the demands of mission-critical customers.
• Partner with product, design, QA, and other engineering team members to deliver refined and dependable solutions.
• Contribute to architectural decisions, code reviews, technical planning, and engineering standards.
• Identify opportunities to improve development processes, application performance, and long-term maintainability.
• Mentor and support other engineers through technical guidance, code quality feedback, and knowledge sharing.

• Strong experience developing production applications with TypeScript, JavaScript, or similar languages.
• Proven experience building and maintaining applications with React Native, Angular, and responsive UI frameworks.
• Experience working with mobile applications in a production environment.
• Experience with backend processes and services, including Express and MongoDB.
• Strong problem-solving skills with the ability to analyze complex technical issues and drive them to resolution.
• Ability to design scalable, maintainable, and reliable software solutions.
• Strong communication skills, including the ability to provide technical guidance, strategy, and execution plans.
• Demonstrated ability to take ownership of complex projects and deliver high-quality outcomes.
• Experience participating in code reviews, architecture discussions, and cross-functional technical planning.

• Bachelor's degree in Computer Science, Software Engineering, a related field, or equivalent professional experience.
• Experience as a developer working in native Android with Java or Kotlin.
• Experience as a developer working in native iOS with Objective-C or Swift.
• Experience mentoring engineers or leading technical projects.
• Experience supporting mission-critical applications, connected devices, communication platforms, or enterprise SaaS products.
• Familiarity with performance optimization, observability, automated testing, CI/CD, and production support best practices.