Top Software Engineer Jobs in Louisville, KY

Lead the technical direction, architecture, migration, reliability, scalability, performance, and security of cloud-native authentication services. Drive complex multi-quarter initiatives using Go and Python across AWS and GCP, establish engineering standards, support incident response and observability improvements, and influence cross-functional roadmaps. Mentor engineers through technical guidance, reviews, and collaboration while participating in on-call support.

Architect and deliver distributed backend systems and infrastructure supporting customer service and KYC compliance workflows. Set technical direction, define roadmaps, lead end-to-end project delivery, mentor engineers, and build reliable high-scale services using Go, gRPC, TypeScript, React, cloud infrastructure, and DevOps tooling. Partner across teams and time zones to improve platform capabilities, workflow efficiency, cost, quality, customer satisfaction, and compliance outcomes.

Build and maintain scalable backend applications, serverless functions, microservices, data workflows, ETL pipelines, and cloud-native architectures using Python and AWS. Manage databases, APIs, batch jobs, and real-time integrations while optimizing performance, scalability, security, compliance, and cost. Collaborate with product, engineering, analytics, and data teams; contribute to architecture, CI/CD, infrastructure automation, development standards, and technical mentorship. Healthcare claims data experience is required.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

Build full-stack features for a real-time collaborative content platform, spanning backend services, APIs, and frontend systems. Design and implement maintainable, well-tested software; contribute to architecture and technical decisions; collaborate with product and design; integrate AI into development and product workflows; participate in code reviews; and help establish engineering quality standards on an early-stage team.

Lead design and delivery of enhancements to a next-generation AI agent platform. Own large features and infrastructure, mentor engineers, set technical standards, drive cross-team initiatives, improve reliability and SLOs, and influence product and process decisions to scale systems supporting millions of interactions.

The Senior Software Engineer for the Treasury team will develop backend services for fund management, ensuring system reliability and leading projects in a fast-paced environment.

Build and scale backend systems for a high-traffic donor CRM and payments platform. Own performant SQL and realtime querying, optimize payment flows, implement AI agents, and collaborate across product and design to ship resilient, production-grade features at scale.

Leads architecture and development of Thunderbird’s web-based Services products, including calendar and secure file storage offerings. Responsibilities include writing code, prototyping, selecting technologies, developing analytics and infrastructure, solving complex problems, guiding product direction, mentoring engineers, and improving scalability and sustainability. The role collaborates across engineering, product, design, QA, Mozilla, and open-source communities in a fully remote environment.

Lead architecture and technical direction for Thunderbird’s web-based Services products, including calendar and secure file storage offerings. Responsibilities include writing code, prototyping, making technology decisions, developing analytics and infrastructure, solving complex problems, mentoring engineers, collaborating across product and design teams, and improving system scalability and maintainability. The role also contributes to product growth, open-source collaboration, and data-informed decisions within a fully remote international team.

Designs, builds, and supports SSIS packages and C#/.NET API integrations for secure file transfers, data transformation, file processing, and connectivity between internal systems, external partners, record management systems, and web applications. Responsibilities include SQL optimization, workflow automation, troubleshooting, deployment support, requirements gathering, and compliance with security and privacy standards.

Develop and maintain PowerUp Sports’ software platform, build and release new features, integrate technologies, optimize PHP applications on Azure, manage SQL Server databases, participate in code reviews, mentor junior developers, and support scalable, reliable architecture.

Design, build, and maintain scalable AI systems and backend products. Responsibilities include backend development, front-end integration, database performance optimization, data security, debugging, unit testing, code reviews, and building, releasing, and maintaining containerized solutions.

Build and improve frontend interfaces for DogByte and other internal products used by veterinary hospitals. Own projects from problem framing through production release, collaborate with Design and Product, uphold accessibility and performance standards, evolve shared components and design systems, review technical work, and contribute to backend or full-stack development as needed. Apply AI tools thoughtfully across development workflows while maintaining quality and reliability.

Build and scale Daymark Health’s cancer care platform across the stack. Responsibilities include developing secure infrastructure and core systems, collaborating with product, data, operations, and customers, integrating workflows, following HIPAA and SOC 2 controls, handling PHI securely, and using AI coding tools to accelerate development. The role requires contributing to technical strategy, improving user experience, and adapting quickly in a startup environment.

Build and maintain fundraising technology that supports donors, fundraisers, donation processing, and reporting. Responsibilities include website development, backend integrations, legacy-system maintenance, data processing, testing, launches, bug fixes, incident ownership, and on-call support during peak donation periods. The role requires autonomous work with Laravel, PHP, JavaScript, HTML, CSS, Salesforce, WordPress, SQL, and partner CSV files, along with close collaboration with non-engineering fundraising teams.

Own significant areas of PayBox end-to-end, from problem definition through production and iteration. Build AI-interface payment and peer-to-peer transfer experiences, integrations across AI platforms, and infrastructure for applications and plugins. Partner with Product, improve onboarding and UX, make pragmatic architectural decisions, and operate autonomously in an ambiguous, fast-moving environment. The role emphasizes strong systems thinking, product judgment, thoroughness, and extensive but accountable use of AI.

Designs, develops, tests, debugs, and maintains scalable React Native mobile applications for iOS and Android. Owns major mobile projects, defines architecture and APIs, manages backend and third-party integrations, improves performance and reliability, and supports modernization efforts. Collaborates across engineering, product, design, QA, security, and business teams while mentoring engineers and promoting Agile, CI/CD, testing, documentation, and mobile development best practices.

Design and lead the technical strategy for search across Vannevar’s products. Build and improve full-text, vector, and LLM-powered retrieval systems, optimizing latency, relevance, index quality, freshness, and performance. Collaborate with ML, product, design, and mission strategy teams to translate user needs into search innovations. Apply expertise in information retrieval, NLP, machine learning, indexing, ranking, query parsing, tokenization, vector search, and evaluation frameworks.

Lead architecture and technical execution for Toast’s Payroll and Team Management products. Own authentication, authorization, and organizational hierarchy across a multi-tenant SaaS platform. Drive high-scale, full-stack initiatives, modern agentic development practices, integrations, technical strategy, quality standards, deployment practices, and cross-functional collaboration. Mentor engineers across teams and leverage AI tools and LLM integration to improve software development velocity and quality.

Lead frontend development for Coinbase identity experiences including login, signup, OAuth, account security, and multi-factor authentication. Own projects from design through deployment and monitoring, guide Native versus Webview architecture, author technical designs, resolve systemic technical debt, lead on-call and incident response, and mentor engineers.

Build web-first product experiences, reusable components, RESTful APIs, and scalable data pipelines for Wikimedia’s web and mobile app surfaces. Deliver initiatives from discovery through production, emphasizing accessibility, performance, testing, observability, and maintainability. Collaborate with product managers, designers, analysts, and native app engineers in a fully remote environment while prioritizing user impact, technical quality, and pragmatic delivery.

Build and improve scalable, accessible iOS experiences for Wikipedia. Lead technical discovery, system design, implementation, testing, observability, prioritization, and delivery of medium-complexity initiatives. Collaborate with product managers, designers, analysts, and engineers while managing scope, risks, tradeoffs, and documentation. The role requires strong Swift, SwiftUI, UIKit, iOS architecture, and performance optimization experience in an autonomous, remote, cross-functional environment.

Designs, develops, tests, and maintains robotics middleware and application frameworks in modern C++ on embedded Linux. Owns platform components through deployment and fleet operation, improves reliability and performance, diagnoses complex concurrency and systems issues, and translates safety requirements into software behavior and verification. Collaborates across autonomy, systems, hardware, and software teams while leading technical reviews and mentoring engineers.

Design, develop, and maintain scalable backend services and APIs (Node.js, Firebase). Optimize performance, ensure code quality via reviews and unit tests, debug and upgrade systems, and contribute to frontend work as needed. Stay current on backend and Gen AI integrations and collaborate across the team.