Sr. Software Engineer (Tech Lead)

At Lumen Dynamics, we believe change happens on purpose. We champion the power and potential of nonprofits, igniting next-level impact with the team and technology built for purpose. Our powerful giving platform and stellar support enable tens of thousands of nonprofits to raise more, recruit more, and retain more, fueling maximum impact and raising the bar on what’s possible for the nonprofit sector. That's why, even as the nonprofit sector sees declines in giving, Lumen Dynamics customers raise more year over year. We're also in the business of creating thriving employees. Join a mission-driven culture built on our core values of Simplify, Care and Act. We know our people are the key to our success, and we're proud to be home to some of the most innovative and skilled individuals in the workforce today. Come feel invigorated and unstoppable with us! The Role As a Sr. Software Engineer at Lumen Dynamics you will act as a driving force behind our mission to empower nonprofits. You don’t just write code; you shape the technical direction of our platform, working at the intersection of Product, QA, and Engineering to deliver high-impact SaaS solutions. You are a leader who thrives in an agile environment, embraces the future of AI-driven development, and enjoys mentoring a high performing team of Software Engineers. What You Will Do Own the technical vision and direction for your domain, ensuring the team builds solutions that are scalable, maintainable, and aligned with enterprise architectural guidance. Diagnose and resolve complex technical bottlenecks, leveraging deep knowledge of debugging tools to maintain the performance of our SaaS applications. Champion Agile ceremonies and workflows, ensuring iterative delivery, high velocity, and continuous improvement within the sprint cycle. Conduct rigorous code reviews in adherence to coding standards, to catch potential bugs and provide constructive feedback to elevate the team's standards. Champion AI-driven development to enhance development productivity, code analysis, and technical problem-solving within your team's workflows. Use AI tools (Claude Code, etc) daily for coding, code analysis, and problem-solving. Serves as the technical lead, owning the development of the entire team — from junior to senior — by proactively identifying skill gaps, driving structured growth plans, and holding the bar high. Success is measured by engineers who ship with confidence, fewer production incidents, and a team that raises its own standards over time. What You Need to Succeed Technical Mastery & Architectural Depth Full-Stack Proficienc y: You bring deep expertise in .NET (C#) and TypeScript/Node, with a sophisticated understanding of React.JS and modern JavaScript architecture. Proficiency with writing automated tests (e.g. using Selenium or Playwright) Proficiency with event-driven development & microservices Data & Performance: You possess strong SQL skills and a firm grasp of multi-threading and asynchronous operations ( async/await ) to build high-performing, scalable systems. Quality-First Mindset: You don’t just write code; you own quality outcomes. You understand the test pyramid (unit, integration, and E2E) and have a proven ability to build stability into the SDLC from day one. Future-Ready: You are curious about the frontier of engineering, including the responsible integration of AI tools to drive efficiency and solve complex problems. Leadership & Strategic Ownership Accountability: You model excellence and take ultimate responsibility for what your team ships. You aren't afraid to evolve code review processes and automations to stay ahead of team growth. Technical Stewardship: You balance the need for speed with long-term stability, actively managing technical debt and ensuring systems are built to last. Product Partnership: You act as a true peer to Product Management. You provide clarity on what is "risky" or "expensive," surfacing constraints early and suggesting emerging technologies to solve challenging problems. Continuous Evolution Growth Orientation: You have a passion for continuous learning and a desire to elevate the standards of those around you. Mission-Driven: You align your technical decisions with the broader goal of supporting our mission, ensuring our software empowers our users effectively. Nice to Haves But Not Required Experience with .NET Core Experience with NestJS and Kafka Cloud Infrastructure (AWS) CRM experience Benefits Health + Wellness You’ll have access to generous health, vision, and dental insurance options as well as HealthiestYou, a healthcare service that offers convenient, confidential access to quality doctors 24/7, anytime, anywhere. Time Off You'll get a competitive PTO package that includes 20 PTO days, 3 flex days, 4 optional volunteer days, 12 paid holidays, as well as paid parental leave. More is more! 401k You'll receive a 401k match to help invest in your future. Equipment Everything you need to be successful, shipped right to your door. You got this. We got you. Compensation The salary range for this position is $114,800 - $180,000. You may also be eligible for a discretionary bonus. Actual compensation within the range will be dependent on your skills, experience, qualifications, and location, as well as applicable employment laws Location This is a permanent, full-time, fully remote position (within the U.S. and select Canadian Provinces only). Employees living in Indianapolis, IN are welcome to work from our company headquarters. We do not offer Visa sponsorship or relocation assistance at this time. Accommodations Applicants who require accommodations may contact [email protected] to request an accommodation in completing an application. Lumen Dynamics is an Equal Opportunity Employer. Individuals seeking employment at Lumen Dynamics are considered without regard to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, or sexual orientation.