<h3><strong>Job requirements</strong></h3><div><br></div><div><strong>What we’re after:</strong></div><ul><li>Someone who is ready to jump in and get work done.</li><li>Passion for the whole product process: we know you will have your specific areas of focus, but we find that people who are passionate about the bigger picture collaborate best on our cross-functional teams</li><li>Demonstrated ability to rely on an iterative process to maintain momentum on projects: our work is never going to be perfect, and we expect you to be able to prioritize what matters most in order to consistently and efficiently iterate and continuously deliver valuable working software</li><li>Familiarity with modern development tools, libraries, and frameworks: most of our team uses React, React Native, Redux, Node, GraphQL, GitHub, PostGres, VS Code, CircleCI, Jest, etc.</li><li>Experience with Stripe integrations and hands-on expertise in building, maintaining, and scaling payment systems, including implementing APIs and ensuring secure, seamless transactions.<br><br></li></ul><div><strong>Responsibilities of this position include:<br></strong><br></div><ul><li>Gaining an understanding of who the users are, what their problems are, and why those problems exist</li><li>Putting the user — and their problems/needs — first in order to create and drive empathy for the solution you’re building</li><li>Translating a well-designed solution of sketches, wireframes, or high-fidelity mockups into fully functioning immersive web and mobile experiences</li><li>Writing approachable, modern JavaScript for web and mobile applications</li><li>Developing and maintaining payment systems, including integrating and optimizing Stripe APIs for a smooth and secure user experience.</li><li>Working closely with a team of designers and developers</li><li>Maintaining development workflow with Github</li><li>Effectively communicating via Linear, Basecamp, Slack, and video calls</li><li>Executing with quality and speed in a fast-paced, sometimes ambiguous environment</li><li>Incorporating feedback into your work</li><li>Delivering tested, maintainable, and documented software<br><br></li></ul><div><strong>What you can expect to do:<br></strong><br></div><ul><li>Work iteratively and collaboratively with product leads and development operations to ship feature requests with a 7 day turn around</li><li>Continuously learn and improve technical and communication skills<br><br></li></ul><div><strong>Differential employees are those who:<br></strong><br></div><ul><li>Communicate effectively with clients and teammates</li><li>Are self-motivated</li><li>Learn quickly and relentlessly</li><li>Are curious about technology and the impact it can make on the world</li><li>Enjoy taking ownership and responsibility for their work</li><li>Enjoy collaborating with others on solving meaningful problems</li></ul><div><br></div><h3><strong>About Differential</strong></h3><div>Differential is growing! Yep, it turns out clients like us :) Our team of designers, developers, jokesters, and all around good folk needs more firepower. We’re proudly headquartered in Cincinnati, OH, but our team spans across the country.</div><div>&nbsp;</div><div>In addition to only choosing the best group of people to work around, we are also very picky about the types of clients we’ll work with. In line with our mission to rapidly unlock value for good people with meaningful ideas, we partner with forward-thinking corporate pioneers and innovators to revolutionize their organizations from the inside out and bring great digital products to life. This translates to a diverse range of products like transforming retail with Adidas, helping Lexmark innovate cross-industry, streamlining the sales process with Big Ass Fans, to multi-platform mobile apps for large audiences with Crossroads Church.</div><div><br></div><div>We hire great, trustworthy people so that we can optimize for a free &amp; flexible culture: flexible hours, unlimited vacation, remote work, and working on stuff you’re excited about.<br><br></div><div>The ideal candidate for this opening is someone who has a strong passion for writing code to bring digital products to life—a passion for the entire product development process—from identifying the right “How will we…” questions to de-risk an implementation early to sequencing the work. We aim to have working software throughout the development process. Developers who thrive at Differential place equal emphasis between <em>efficiency</em> and <em>approachability</em>. They flourish in a continuous-delivery process where collaboration and ego-free communication is valued. They can engage in product thinking as a team and with cross-functionality among product managers, designers, and our client partners.&nbsp;<br><br></div><div>Above all, we are focused on finding someone that we love to work with. Culture to us isn’t a ping pong table in the breakroom or some words we put up on the wall. It’s embedded in our DNA and starts with our hiring process. We want to consider passionate people for this position.</div>

Senior Software Developer - Full Stack

<div><strong>About Us</strong></div><div>Virtuous is on a mission to inspire global generosity by helping nonprofits build better relationships with their donors. We offer a modern software platform that provides mid-sized charities with elegant tools for fundraising, marketing, volunteerism, and online giving.</div><div><br>Our talented team is driven to disrupt the status quo in the nonprofit sector. We are hungry, humble, and committed to delivering best-in-class software solutions, customer success interactions, and sales experiences to the world’s leading nonprofits&nbsp;</div><div><br></div><div>We also recognize the importance of giving back and making a difference in the communities where we live and work. That's why we practice radical generosity by volunteering at nonprofits or going the extra mile for our team and the customers we serve. We take our work seriously, but we don’t take ourselves too seriously. We believe that life is too short not to love what you do.&nbsp;</div><div><br>The ideal candidate for Virtuous embodies our values by:</div><ul><li>Asking questions with a spirit of curiosity</li><li>Giving feedback freely with candor &amp; grace, welcoming it in return</li><li>Displaying a passion for philanthropy and technology&nbsp;</li><li>Serving with joy. Everyone is willing to make the coffee!</li><li>Celebrating the wins &amp; milestones of others&nbsp;</li><li>Assuming good intent &amp; demonstrating trust in others&nbsp;</li><li>Pursuing relationships with people different from themselves &amp; creates space to be human</li></ul><div><strong><br>Position Summary</strong></div><div><br>We’re looking for a Senior Software Engineer (Full Stack) to join our growing Engineering team. This role will report directly to Engineering leadership and collaborate cross-functionally with stakeholders across Product, Design and Engineering.</div><div><br>You'll help us build, scale, and maintain the web applications that power the Virtuous platform — keeping them fast, reliable, and observable as our traffic and data grow, while also shipping the net-new features that win deals and deepen the value customers get from the product. You should feel comfortable across the full stack, from crafting intuitive UIs to designing robust backend services, but gravitate toward the harder questions: How does this behave under load? Where does it fall over, and how do we know before our customers do? How do we ship quickly without sacrificing reliability?</div><div><br>It's essential that you already know and actively use modern AI development tools and that you're curious about how to make them work harder for you. We treat AI agents as a core part of how strong engineers work today: a force multiplier across the entire stack. But we never trade speed for quality. You stay firmly in the driver's seat, owning the correctness, design, and long-term health of everything you ship, and bringing the judgment to know when to lean on a tool, when to question it, and when a hard problem still demands your own thinking.</div><div><br>Our current tech stack is Python/Django on the backend, with PostgreSQL as our primary datastore. On the frontend, we're actively migrating from React/GraphQL toward a leaner, server-side architecture built on HTMX. We're continually evaluating tools and frameworks to support a growing platform, and a willingness to explore new technologies and offer thoughtful input into technical and infrastructure decisions is important to us.</div><div><strong><br>Responsibilities</strong></div><div><br>You'll own meaningful, high-impact areas of the platform end to end — not just contribute to them. Specifically, you can expect to:</div><ul><li>Own the performance and scalability of our data layer as we onboard larger and more complex organizations — indexing, query optimization, read replicas, partitioning, and connection pooling — so onboarding and day-to-day usage stay fast and reliable even at enterprise scale</li><li>Own our asynchronous and background-processing infrastructure (e.g., Celery), keeping it healthy, observable, and able to keep pace with growing data volume</li><li>Design, build, and ship net-new, revenue-driving features across the full stack — from messaging and bulk-sending capabilities to richer reporting, analytics, and email experiences</li><li>Help reinforce and extend our move to a server-side, HTMX-based frontend, improving both developer velocity and front-end reliability</li><li>Design, build, and maintain scalable web applications used by nonprofit organizations around the world</li><li>Collaborate closely with cross-functional teams to understand user needs and translate them into technical solutions</li><li>Write clean, testable, and efficient code across the frontend and backend</li><li>Contribute to architectural discussions and help drive technical decision-making across the platform</li><li>Participate in code reviews, and help foster a culture of learning and improvement</li><li>Own the reliability, performance, and observability of the systems you work on — instrument them well, set meaningful alerts, and treat production health as a first-class part of the work</li><li>Provide thoughtful feedback on technology choices as we evaluate changes across our stack</li><li>Support a culture of experimentation, iteration, and continuous delivery</li></ul><div><strong><br>You Must Have</strong></div><ul><li>6+ years building modern web applications, including meaningful time spent running and scaling them in production</li><li>Proficiency in Python and frameworks like Django (or similar)</li><li>Hands-on experience with AI coding agents (Claude Code, Cursor, Copilot, etc.) as part of your regular development workflow</li><li>Experience operating cloud infrastructure (AWS, GCP, or Azure) and infrastructure-as-code tooling (e.g., Terraform)</li><li>Experience with JavaScript/TypeScript and frontend frameworks such as React or Vue</li><li>Strong understanding of relational databases such as PostgreSQL — not just querying them, but tuning them: indexing, query optimization, and strategies for scaling (read replicas, partitioning, connection pooling, etc.)</li><li>Experience integrating with RESTful and/or GraphQL APIs</li><li>Solid DevOps fundamentals: CI/CD pipelines, containerization, infrastructure monitoring, and hands-on experience scaling applications under real load</li><li>Comfort with observability tooling (metrics, logging, tracing, alerting) and a habit of using it to debug and prevent production issues</li><li>A love for building quality products that delight users and solve real problems</li><li>Strong communication skills and a team-first mindset</li></ul><div><strong><br>Nice to Haves</strong></div><ul><li>Familiarity with container orchestration (Kubernetes) or modern PaaS deployment</li><li>Experience defining and working against SLOs/SLIs, or otherwise formalizing reliability targets</li><li>Experience working in a SaaS or B2B product company</li><li>Familiarity with C# / .NET</li><li>Prior experience in the nonprofit tech space</li><li>Contributions to open-source projects or relevant technical blogs</li><li>Excitement about helping teams grow and mature their engineering practices</li></ul><div><strong><br>What We Offer</strong></div><ul><li>Market competitive pay leveraging Carta data</li><li>Employee recognition through Bonusly (birthdays, anniversaries, achievements, etc.)</li><li>401(k) retirement plan with company matching- 50% match up to 6% of compensation after 90 days</li><li>We value our employee’s work-life balance and encourage taking advantage of Unlimited PTO</li><li>Supportive time off including paid volunteer days and company holidays</li><li>Employer-contributed healthcare benefits, encompassing medical, dental, and vision coverage, with plans available for dependents and choices for Health Savings Accounts (HSA) and Flexible Spending Accounts (FSA).</li><li>12 weeks primary parent leave, 4 weeks secondary parent leave - full pay (adoption as well)</li><li>We pride ourselves on Community and host exciting company outings and events.</li></ul>

Senior Software Engineer (Full Stack)

<div><strong>Help Us Build the Relational Operating System for Churches and Ministries<br></strong><br></div><div>At Called, we’re building the relational operating system for churches and ministries.<br><br></div><div>Our platform helps ministry leaders know their people, build stronger community, and foster deeper discipleship throughout the week, not just on Sundays.<br><br></div><div>Most churches serve hundreds, if not thousands, of people. Yet very few people in these communities feel truly known. People often drift away not because they reject belief, but because nobody notices they disappeared.<br><br></div><div>We’re a small, high-trust team building meaningful software with modern tools, AI-assisted workflows, and a strong sense of mission. We move fast, care deeply about quality, and believe technology should strengthen human relationships, not replace them.<br><br></div><div>If you want to help rebuild community in a disconnected world through thoughtful software, we’d love to meet you.<br><br><br></div><div><strong>About the Role</strong></div><div>We are looking for a <strong>Senior Full Stack Engineer, Web &amp; Mobile</strong> to build polished, reliable experiences across the Called platform.<br><br></div><div>This is a full stack engineering role with a strong emphasis on <strong>frontend development, responsive web, mobile usability, React, TypeScript, Capacitor, release quality, and user-facing craft</strong>.<br><br></div><div>You should be comfortable working across the stack, but your strongest instincts should be around the user experience: how the interface behaves, how it feels on mobile, how users move through workflows, and how to ship features that are useful, reliable, and easy to use.<br><br></div><div>A major part of this role will be owning the quality of our web and mobile experiences. That includes building responsive interfaces, testing mobile workflows, documenting mobile-specific issues, validating fixes, understanding app store requirements, and helping manage release workflows where applicable.<br><br></div><div>We are especially excited about engineers who are AI-forward and use modern tools to move faster, prototype quickly, debug effectively, improve quality, and reduce repetitive work.<br><br></div><div>This is a senior individual contributor role, not a people-management role or formal technical lead role.<br><br><br></div><div><strong>What You'll Do</strong></div><ul><li>Build and improve features using <strong>React, TypeScript, React Query, CSS Modules, Python, Django, PostgreSQL, and related tools</strong>.</li><li>Create responsive, accessible interfaces that work well across desktop, tablet, and mobile devices.</li><li>Own frontend-heavy features from planning through implementation, QA, release, and iteration.</li><li>Work with backend APIs to fetch, update, validate, and manage application data.</li><li>Contribute to backend services, APIs, data models, and integrations when needed.</li><li>Test mobile and responsive workflows across devices, browsers, screen sizes, and app environments.</li><li>Own QA for mobile issues, including reproduction, documentation, fix verification, and regression prevention.</li><li>Help manage mobile release readiness, including build validation, release checklists, app store awareness, versioning, and post-release validation.</li><li>Improve frontend architecture, component patterns, state management, data fetching, performance, accessibility, and maintainability.</li><li>Use AI-assisted tools for development, debugging, prototyping, documentation, testing, and product iteration.</li><li>Participate in code reviews, technical discussions, testing, and team knowledge-sharing.<br><br><br></li></ul><div><strong>Our Engineering Philosophy</strong></div><div>We believe modern engineers should be dramatically amplified by AI.<br><br></div><div>Our team actively uses AI-assisted workflows for development, debugging, prototyping, testing, documentation, automation, and rapid product iteration.<br><br></div><div>We care far more about builders who can move fast, learn quickly, and solve problems than developers obsessed with rigid specialization.<br><br></div><div><strong>We value:</strong></div><ul><li>Ownership over bureaucracy</li><li>Shipping over perfectionism</li><li>Curiosity over ego</li><li>Product thinking over ticket completion</li><li>Mission and craftsmanship equally<br><br><br></li></ul><div><strong>What We’re Looking For</strong></div><ul><li>5+ years of software engineering experience, or equivalent experience building and shipping meaningful production software.</li><li>Strong experience with <strong>React, TypeScript, JavaScript, HTML, CSS, and responsive design</strong>.</li><li>Experience building high-quality interfaces for desktop, tablet, and mobile users.</li><li>Strong understanding of frontend architecture, component design, state management, data fetching, browser behavior, performance, and accessibility.</li><li>Experience testing and debugging responsive or mobile experiences across devices, browsers, and screen sizes.</li><li>Experience with mobile release workflows, app store deployment, mobile QA, hybrid mobile apps, or app-like web experiences.</li><li>Experience working with APIs and contributing across the stack, ideally with <strong>Python, Django, REST APIs, PostgreSQL, or similar technologies</strong>.</li><li>Experience using Git in a collaborative development environment.</li><li>Experience using AI-assisted development tools or agentic workflows for coding, debugging, documentation, automation, testing, or productivity.</li><li>Strong attention to detail, clear communication, and a willingness to own quality before release.</li><li>A passion for building technology that supports a mission-driven organization.<br><br><br></li></ul><div><strong>People Who Thrive Here</strong></div><ul><li>Senior individual contributors who enjoy ownership without needing a management title</li><li>Full stack engineers whose strongest instincts are frontend, mobile, and user experience</li><li>Builders excited by AI and modern engineering workflows</li><li>Product-minded engineers who think beyond the ticket</li><li>Team players with low ego and high standards</li><li>Engineers who can move across the stack without treating user experience as an afterthought<br><br><br></li></ul><div><strong>Bonus Skills</strong></div><ul><li>Experience with <strong>Capacitor</strong> and hybrid mobile app workflows, including testing, builds, app store submissions, and mobile release management.</li><li>Experience with React Native, Expo, Ionic, Progressive Web Apps, or similar hybrid mobile workflows.</li><li>Experience with mobile-first design, design systems, component libraries, or reusable frontend patterns.</li><li>Familiarity with Docker, AWS, CI/CD pipelines, automated testing, authentication, permissions, or role-based access control.</li><li>Experience building AI-powered product features or internal AI developer workflows.<br><br><br></li></ul><div><strong>What You’ll Love About Us</strong></div><ul><li>100% remote position</li><li>Small team with real ownership and influence</li><li>Fast decision-making and minimal bureaucracy</li><li>AI-forward engineering culture</li><li>Strong work/life boundaries</li><li>Generous PTO and 12 paid holidays</li><li>Company-wide shutdown between Christmas and New Year’s</li><li>Health benefits</li><li>Opportunity for rapid growth and mentorship</li><li>Mission-driven work with real-world impact</li></ul>

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