> Markdown version of [/jobs/ext/3005830-full-stack-engineer](https://www.wearedevelopers.com/jobs/ext/3005830-full-stack-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # full-stack engineer - **Company:** FINE LINES GROUP, LLC. - **Location:** Aurora, CO, United States - **Contract:** Permanent contract - **Skills:** .NET Framework, Application Programming Interfaces (APIs), Artificial Intelligence, Audit Trail, User Authentication, C Sharp (Programming Language), Continuous Delivery, Continuous Integration, Data Stores, Database Design, DevOps, Programming Tools, Distributed Systems, PostgreSQL, Microsoft Software, MongoDB, OAuth, Redis, Reliability Engineering, Requirements Management, Software Deployment, Software Engineering, Data Streaming, Systems Architecture, Data Processing, Autoscaling, ReactJS, System Availability, Software Security, Event Driven Architecture, Sentry, Apache Kafka, Restful APIs, Stream Processing, Api Management - **Published:** September 19, 2026 - **Apply:** https://www.careerbuilder.com/job-details/staff-full-stack-engineer-net-react-ai-aurora-co--f135affc-5702-451f-9432-02fe7d8b3031 ## About the Role Are you a highly experienced full-stack engineer who thrives on solving complex technical challenges and delivering production-ready solutions at speed? We are seeking a Staff Full-Stack Engineer - .NET, React & AI to play a key role in building an AI-driven engineering platform where innovation, ownership, and technical excellence are at the heart of everything., * Proven experience designing and operating highly available, high-throughput systems at scale. * Hands-on experience with MongoDB, PostgreSQL, and Redis, with the ability to select the appropriate data store based on workload. * Experience building event-driven architectures using Apache Kafka or similar event hub technologies, including producer/consumer patterns, schema design, and real-time data processing. * Demonstrated experience designing and delivering third-party and B2B API integrations. * Strong understanding of API security, including OAuth authentication, HMAC request signing, idempotency, replay protection, and audit logging. * Practical experience using AI-assisted development tools and coding agents to improve engineering productivity. * Experience with production monitoring, observability, CI/CD pipelines, and issue triage using tools such as Sentry or equivalent. Delivery & Leadership * Proven ability to deliver high-quality software within demanding timelines while balancing speed and quality. * Comfortable managing multiple priorities across concurrent workstreams. * Demonstrated ownership of projects from ambiguous requirements through to successful production delivery. * A proactive, solutions-focused mindset with the confidence to make informed decisions, navigate uncertainty, and independently drive outcomes., Apache Kafka, Application Programming Interface (API), Artificial Intelligence (AI), Artificial Intelligence (AI) Agents, Authentication, Automation, Autoscaling, Building Systems, Business Operations, Business-to-Business (B2B), Consumer Branding, Continuous Deployment/Delivery, Continuous Improvement, Continuous Integration, Data Processing, Database Design, Distributed Computing, Emerging Technology, Environmental Issues, High Availability, High Throughput, Mentoring, Microsoft .NET, Microsoft C# (C Sharp), MongoDB, Multitasking, OAuth, PostgreSQL, Problem Solving Skills, Production Control, Production Systems, Productivity Management, Programming Tools, Quality Management, Quality Metrics, REST (Representational State Transfer), React.js, Redis, Reliability Engineering, Requirements Management, Software Development, System Architecture, Team Player, Technical Delivery, Technical Leadership, Test Plan/Schedule ## Description As a Staff Full-Stack Engineer - .NET, React & AI, you will take ownership of product delivery from concept through to production. You'll work across the full technology stack, leveraging AI coding agents and modern engineering practices to accelerate delivery without compromising quality. This role combines hands-on software development, technical leadership, systems architecture, and platform engineering in a fast-paced environment where autonomy and accountability are highly valued. Key Responsibilities * Own the end-to-end delivery of product features, including design, development, testing, verification against acceptance criteria, and production deployment. * Build and maintain third-party and B2B integrations, delivering customer- and brand-specific functionality on top of a shared, scalable platform. * Leverage AI coding agents and automated verification tools to improve development speed while maintaining engineering quality standards. * Design, build, and operate highly available, high-performance distributed systems. * Establish technical patterns, mentor through example, and remove technical roadblocks across multiple concurrent workstreams. * Monitor production environments, investigate issues, and continuously improve platform reliability, observability, and deployment processes. Skills & ExperienceTechnical Expertise * Extensive commercial experience delivering production-grade, full-stack applications. * Strong expertise in .NET / C#, RESTful API development, and Next.js / React, including server-side rendering and real-time streaming using Server-Sent Events (SSE). ## Related Videos - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [From Doubt to Confidence: How Sentry Uses Verdaccio to Bulletproof SDK Releases](https://www.wearedevelopers.com/videos/739-from-doubt-to-confidence-how-sentry-uses-verdaccio-to-bulletproof-sdk-releases) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Debugging in the Dark](https://www.wearedevelopers.com/videos/1658-debugging-in-the-dark) - [Delay the AI Overlords: How OAuth and OpenFGA Can Keep Your AI Agents from Going Rogue](https://www.wearedevelopers.com/videos/1637-delay-the-ai-overlords-how-oauth-and-openfga-can-keep-your-ai-agents-from-going-rogue) ## Related Articles - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 132 - Binging WADFlix?](https://www.wearedevelopers.com/magazine/473-dev-digest-132-binging-wadflix) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)