Explore 3 backend java developer jobs from 3 hiring companies in Olathe, KS, US. Filter by remote, salary, experience, and company, then open any listing to apply.

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Backend Java Developer

Lenexa

Gardner

Overland Park

Kansas City

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Independence

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Backend Java Developer Jobs

The Global Orphan Project

TreviPay

weavix

Hybrid

Onsite

Sr Android Platform Engineer

Android Platform Engineer

5+ years Android platform engineering; custom Android OS (AOSP) modifications; Android 14+; Kotlin/Java; C/C++; JNI; Node.js backend; React Native; hardware/software integration.

<div><span data-olk-copy-source="MessageBody">TreviPay, The Pay by Invoice Company™, is the global B2B payments infrastructure partner for manufacturers, retailers, travel companies and banks. With our fully managed platform, intelligent apps, and 40 years of buyer intelligence, we help buyers buy, and sellers grow and get paid faster. Enabling more than $8B in global trade annually, TreviPay operates in 35 countries, with offices in Kansas, Mexico City, San Jose CR, Rijswijk NL, and Melbourne AU.</span></div><div><br></div><div><span style="font-size: 16px;">Every day, TreviPay employees are challenged and empowered in a supportive, collaborative, entrepreneurial environment. We are committed to building world-class products and culture, and we’re looking for a curious, value-focused, and innovative&nbsp;</span><strong style="font-size: 16px;">Senior</strong><span style="font-size: 16px;">&nbsp;</span><strong style="font-size: 16px;">Full-Stack Software Engineer</strong><span style="font-size: 16px;"> who enjoys solving interesting problems and delivering high-quality software from front to back.</span></div>
<div>&nbsp;</div>
<div><strong style="font-size: 16px;">What will I be doing?</strong></div>
<div><span style="font-size: 16px;">· Designing, building, and maintaining modern, secure, and maintainable software across the full technology stack, including user interfaces, APIs, and backend services</span></div>
<div><span style="font-size: 16px;">· Developing rich, responsive user experiences using Angular, HTML5, CSS, and JavaScript, with attention to layout, typography, accessibility, and performance</span></div>
<div><span style="font-size: 16px;">· Building and evolving well-designed APIs and backend services using Java and Spring Boot, integrating with internal systems and external web services</span></div>
<div><span style="font-size: 16px;">· Collaborating closely with engineering, product management, designers, internal stakeholders, and clients to deliver high-quality solutions that meet business needs</span></div>
<div><span style="font-size: 16px;">· Contributing to architectural discussions and helping maintain a consistent technical approach across the application stack</span></div>
<div><span style="font-size: 16px;">· Observing, monitoring, and supporting systems in production, including participation in on-call support when needed</span></div>
<div><span style="font-size: 16px;">· Mentoring and coaching teammates, sharing best practices across both frontend and backend development</span></div>
<div><span style="font-size: 16px;">· Continuously learning, experimenting, and improving how we build and deliver software</span></div>
<div><span style="font-size: 16px;">· Having fun while building great products!</span></div>
<div>&nbsp;</div>
<div><strong style="font-size: 16px;">What do I need to succeed?</strong></div>
<div><span style="font-size: 16px;">· 8+ years of professional experience as a software engineer, with hands-on experience across both frontend and backend development</span></div>
<div><span style="font-size: 16px;">· Demonstrated experience building modern, secure, maintainable, and high-performance applications end-to-end</span></div>
<div><span style="font-size: 16px;">· Proficiency with Java and Spring Boot for building backend services and APIs</span></div>
<div><span style="font-size: 16px;">· Solid understanding of RESTful APIs and integrating with external web services</span></div>
<div><span style="font-size: 16px;">· Experience working with Git version control and CI/CD pipelines</span></div>
<div><span style="font-size: 16px;">· Strong experience with Angular (17+), TypeScript, HTML5, and CSS (including preprocessors such as Less or Sass)</span></div>
<div><span style="font-size: 16px;">· Familiarity with cloud platforms such as AWS or Heroku and deploying applications to cloud environments</span></div>
<div><span style="font-size: 16px;">· Strong communication skills and the ability to work effectively as part of a distributed, cross-functional team</span></div>
<div><span style="font-size: 16px;">· Openness to mentoring peers and continuously improving your craft</span></div>
<div><span style="font-size: 16px;">· Fintech experience is a plus, but not required—we are complex, which is fun!</span></div>
<div>&nbsp;</div>
<div>&nbsp;</div><br/><br/><div><span style="font-size: 16px;">Every day, TreviPay employees are challenged and empowered in a supportive, collaborative, entrepreneurial environment. We are committed to building world-class products and culture, and we&rsquo;re looking for a curious, value-focused, and innovative&nbsp;</span><strong style="font-size: 16px;">Senior</strong><span style="font-size: 16px;">&nbsp;</span><strong style="font-size: 16px;">Full-Stack Software Engineer</strong><span style="font-size: 16px;"> who enjoys solving interesting problems and delivering high-quality software from front to back.</span></div>
<div>&nbsp;</div>
<div><strong style="font-size: 16px;">What will I be doing?</strong></div>
<div><span style="font-size: 16px;">&middot; Designing, building, and maintaining modern, secure, and maintainable software across the full technology stack, including user interfaces, APIs, and backend services</span></div>
<div><span style="font-size: 16px;">&middot; Developing rich, responsive user experiences using Angular, HTML5, CSS, and JavaScript, with attention to layout, typography, accessibility, and performance</span></div>
<div><span style="font-size: 16px;">&middot; Building and evolving well-designed APIs and backend services using Java and Spring Boot, integrating with internal systems and external web services</span></div>
<div><span style="font-size: 16px;">&middot; Collaborating closely with engineering, product management, designers, internal stakeholders, and clients to deliver high-quality solutions that meet business needs</span></div>
<div><span style="font-size: 16px;">&middot; Contributing to architectural discussions and helping maintain a consistent technical approach across the application stack</span></div>
<div><span style="font-size: 16px;">&middot; Observing, monitoring, and supporting systems in production, including participation in on-call support when needed</span></div>
<div><span style="font-size: 16px;">&middot; Mentoring and coaching teammates, sharing best practices across both frontend and backend development</span></div>
<div><span style="font-size: 16px;">&middot; Continuously learning, experimenting, and improving how we build and deliver software</span></div>
<div><span style="font-size: 16px;">&middot; Having fun while building great products!</span></div>
<div>&nbsp;</div>
<div><strong style="font-size: 16px;">What do I need to succeed?</strong></div>
<div><span style="font-size: 16px;">&middot; 8+ years of professional experience as a software engineer, with hands-on experience across both frontend and backend development</span></div>
<div><span style="font-size: 16px;">&middot; Demonstrated experience building modern, secure, maintainable, and high-performance applications end-to-end</span></div>
<div><span style="font-size: 16px;">&middot; Proficiency with Java and Spring Boot for building backend services and APIs</span></div>
<div><span style="font-size: 16px;">&middot; Solid understanding of RESTful APIs and integrating with external web services</span></div>
<div><span style="font-size: 16px;">&middot; Experience working with Git version control and CI/CD pipelines</span></div>
<div><span style="font-size: 16px;">&middot; Strong experience with Angular (17+), TypeScript, HTML5, and CSS (including preprocessors such as Less or Sass)</span></div>
<div><span style="font-size: 16px;">&middot; Familiarity with cloud platforms such as AWS or Heroku and deploying applications to cloud environments</span></div>
<div><span style="font-size: 16px;">&middot; Strong communication skills and the ability to work effectively as part of a distributed, cross-functional team</span></div>
<div><span style="font-size: 16px;">&middot; Openness to mentoring peers and continuously improving your craft</span></div>
<div><span style="font-size: 16px;">&middot; Fintech experience is a plus, but not required&mdash;we are complex, which is fun!</span></div>
<div>&nbsp;</div>
<div>&nbsp;</div><br/><br/>TreviPay is a global fintech that enables online B2B invoicing and payments. We specialize in payment and credit management for B2B companies across the globe, helping our clients grow by extending terms, handling invoicing, and managing collections. At TreviPay, we take care of our clients by taking care of their customers.

Every day, TreviPay employees are challenged and empowered in a supportive, collaborative, entrepreneurial environment. We are committed to building world-class products and culture, and we’re looking for a curious, value-focused, and innovative Senior Full-Stack Software Engineer who enjoys solving interesting problems and delivering high-quality software from front to back.

What will I be doing?
· Designing, building, and maintaining modern, secure, and maintainable software across the full technology stack, including user interfaces, APIs, and backend services
· Developing rich, responsive user experiences using Angular, HTML5, CSS, and JavaScript, with attention to layout, typography, accessibility, and performance
· Building and evolving well-designed APIs and backend services using Java and Spring Boot, integrating with internal systems and external web services
· Collaborating closely with engineering, product management, designers, internal stakeholders, and clients to deliver high-quality solutions that meet business needs
· Contributing to architectural discussions and helping maintain a consistent technical approach across the application stack
· Observing, monitoring, and supporting systems in production, including participation in on-call support when needed
· Mentoring and coaching teammates, sharing best practices across both frontend and backend development
· Continuously learning, experimenting, and improving how we build and deliver software
· Having fun while building great products!

What do I need to succeed?
· 8+ years of professional experience as a software engineer, with hands-on experience across both frontend and backend development
· Demonstrated experience building modern, secure, maintainable, and high-performance applications end-to-end
· Proficiency with Java and Spring Boot for building backend services and APIs
· Solid understanding of RESTful APIs and integrating with external web services
· Experience working with Git version control and CI/CD pipelines
· Strong experience with Angular (17+), TypeScript, HTML5, and CSS (including preprocessors such as Less or Sass)
· Familiarity with cloud platforms such as AWS or Heroku and deploying applications to cloud environments
· Strong communication skills and the ability to work effectively as part of a distributed, cross-functional team
· Openness to mentoring peers and continuously improving your craft
· Fintech experience is a plus, but not required—we are complex, which is fun!


<br/><br/><div><span style="font-size: 11.5pt;">Why you will love working at TreviPay</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">Competitive salary</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">Paid parental leave</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">Generous paid time off</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">Medical, dental, vision, FSA, Life/AD&amp;D, long and short term disability</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">401K matching</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">Employee referral program</span></div>
<div><span style="font-size: 11.5pt;">&nbsp;</span></div>
<div><span style="font-size: 11.5pt;">At TreviPay we believe:</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">in saying yes to unique and challenging requirements</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">empowered team members are creative team members</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">our products make the customer’s day just a little bit better</span></div>
<div><span style="font-size: 10pt;">·</span><span style="font-size: 7pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size: 11.5pt;">work/life balance makes us all more effective</span></div>
<div><span style="font-size: 11.5pt;">&nbsp;</span></div>
<div><em style="font-size: 11.5pt;">TreviPay is an Equal Opportunity and Affirmative Action Employer.&nbsp; We welcome all veterans and disabled applicants.</em></div>
<div><span style="font-size: 11.5pt;">&nbsp;</span></div>
<div><em style="font-size: 11.5pt;">Individuals with disabilities will be provided reasonable accommodation to participate in the job application and/or interview process. Please contact&nbsp;<a rel="noopener noreferrer" href="mailto:Recruiting@trevipay.com" class="postings-link">Recruiting@trevipay.com</a>&nbsp;to request an accommodation.</em></div>

Senior Software Engineer

Senior Full-Stack Software Engineer

8+ years of software engineering across frontend and backend; Java and Spring Boot; Angular; REST APIs; Git/CI/CD; AWS/Heroku; strong communication; fintech experience a plus.

<p><strong>Organizational Profile</strong>&nbsp;&nbsp;</p>

<p>Strong Family believes that every family has the inherent potential to thrive. Rather than&nbsp;treating the symptoms of crisis, we address the root causes of family breakdown and the orphan&nbsp;cycle through scalable, community-led solutions that restore dignity, strengthen caregivers, and&nbsp;promote long-term stability&mdash;particularly in developing-country contexts where families face&nbsp;systemic economic and social pressures.&nbsp;</p>

<p>&nbsp;<br />
Our strengths-based, technology-enabled framework equips local churches and community&nbsp;leaders with training, tools, and evaluation systems to support families holistically. Through&nbsp;digital platforms, coursework, and data-informed insights, Strong Family helps communities&nbsp;identify needs, mobilize local assets, and track measurable progress as families move from&nbsp; suffering to flourishing.&nbsp;</p>

<p>&nbsp;<br />
Strong Family is currently implemented across East Africa, India, and Haiti, where hundreds of&nbsp;local churches have adopted the framework and demonstrated sustained family stability and&nbsp;child well-being. Building on this foundation, we are expanding into additional developing-&nbsp;country regions globally, scaling a proven model that empowers families, strengthens&nbsp;communities, and creates durable, locally owned change.</p>

<p><strong>Our Impact &nbsp;</strong></p>

<p>The results have been more powerful than we ever imagined. Families not only find healing within themselves but also begin to change the trajectory of their communities. By empowering families to flourish in practical, relational, and spiritual ways, Strong Family is addressing a global crisis at its roots&mdash;creating pathways for children to remain where they belong: safe, loved, and within family.&nbsp;</p>

<p><strong>Position Summary &nbsp;</strong></p>

<p>We are seeking a Senior Full Stack Engineer to help build and evolve the technology that powers&nbsp;Strong Family&rsquo;s global expansion. This role is ideal for an experienced engineer who has depth&nbsp;in one area of the stack and a proven ability to learn and contribute across new layers as&nbsp;product and platform needs to evolve.&nbsp;</p>

<p>You will work on systems used in real-world environments with intermittent connectivity,&nbsp;shared devices, and high expectations for data integrity. Success in this role requires strong&nbsp;engineering judgment, curiosity, and a commitment to building reliable, maintainable software&nbsp;that directly supports families, caregivers, and community leaders.&nbsp;This is an individual contributor role with meaningful ownership and long-term impact.&nbsp;</p>

<p><strong>Your Responsibilities Include&nbsp;</strong></p>

<ul>
	<li>Own features end-to-end, from problem definition through implementation, deployment, and&nbsp;ongoing support&nbsp;</li>
	<li>Design, build, and maintain backend services, including data modeling and migrations&nbsp;</li>
	<li>Build user-facing applications across mobile and web, with an emphasis on clarity, usability,&nbsp;and reliability&nbsp;</li>
	<li>Support offline-capable workflows, including local persistence on mobile devices,&nbsp;synchronization, retries, and conflict handling&nbsp;</li>
	<li>Write unit, integration, and end-to-end tests; add monitoring and guardrails to protect&nbsp;production systems&nbsp;</li>
	<li>Collaborate closely with program stakeholders to translate real-world needs into scalable&nbsp;technical solutions&nbsp;</li>
	<li>Improve system quality and developer experience through refactoring, documentation, and&nbsp;tooling&nbsp;</li>
	<li>Learn and adopt new technologies or layers of the stack as the platform evolves&nbsp;</li>
</ul>

<p><strong>Current Technology Stack (Subject to Evolution)&nbsp;</strong></p>

<ul>
	<li>Mobile / Frontend: Flutter, local persistence (e.g., SQLite)&nbsp;</li>
	<li>Backend: PHP / Laravel, MySQL&nbsp;</li>
	<li>Infrastructure: Cloud-hosted services, CI/CD pipelines, and observability tooling&nbsp;</li>
</ul>

<p>You are not expected to be an expert in every technology listed above. We value adaptability,&nbsp;sound engineering judgment, and a track record of learning over framework-specific mastery.</p>


Senior Full Stack Engineer

Senior-level full stack engineer with end-to-end ownership, mobile app experience, backend and database design, API design, testing and monitoring, and strong collaboration.

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