Top Remote Senior Level Software Engineer Jobs in CO

Design and build scalable, audit-ready backend and full-stack systems for Upstart Bank. Own technical design and delivery of medium-to-large projects, improve reliability, observability, and data consistency, and partner with product, compliance, and operations to deliver regulated fintech solutions.

Design, build, and operate scalable, distributed event-driven systems that automate accounting close and capital risk workflows. Process high-volume financial events into reliable outcomes, lead multi-quarter engineering initiatives, improve reliability and maintainability, and partner with product, analytics, and finance teams.

Design, build, and maintain the White Label platform's scalable APIs, services, and UIs. Partner with product and business stakeholders to deliver self-service investor tools, optimize workflows, ensure security, performance, and availability, and participate in code reviews, testing, and deployments.

Lead design, development, and maintenance of scalable .NET web and Windows applications. Build RESTful APIs, integrate front-end frameworks, collaborate with cross-functional teams, drive architectural decisions, perform code reviews and testing, and support deployments and backlog reduction for the eApp portfolio.

Senior fullstack engineer to build and scale Brigit's consumer finance platform. Own end-to-end features across frontend (React/React Native/TypeScript) and backend (Java/REST/SQL), optimize database and APIs for high scale, integrate 3rd-party services, implement risk and transaction algorithms, improve CI/CD, testing, monitoring, and internal tooling to support millions of users.

Build and maintain core libraries and developer tooling used across the company. Lead complex projects, design and develop backend APIs and AI-assisted developer features, manage platform components (service templates, LaunchDarkly), troubleshoot production issues, conduct code reviews, influence architecture, and mentor engineers to improve developer productivity.

The Senior Software Engineer will drive the retail technology initiatives at Toast, focusing on payment solutions and enhancing customer experiences. Responsibilities include collaborating on high-impact opportunities, technical decision-making, and adapting to customer needs.

Lead a product engineering team to own roadmap delivery for customer-facing console, APIs, and developer workflows. Plan roadmaps, drive system architecture, ensure quality/reliability, run execution processes, hire and mentor engineers, coordinate cross-functional dependencies, and incorporate customer feedback to improve product adoption and performance.

Lead and grow a distributed datacenter storage engineering team owning end-to-end storage from NAND/NVMe to filesystems. Design and operate SAN, NFS, and parallel filesystems (VAST, Lustre), optimize performance (RDMA, GDS), ensure reliability, automation, observability, and collaborate with networking, GPU platform, SRE, and product teams.

Design and implement full‑stack, low‑latency web-based Ground Control Station and C2 systems (map-centric UIs, real-time telemetry, video streaming), lead architecture and APIs, mentor engineers, support field tests and mission deployments, and ensure interoperability with C2 standards.

Become an expert in the Hivemind autonomy stack, create and deliver hands-on technical training, develop training materials and documentation, support customer debugging, and collaborate with product and engineering to improve adoption and training practices. Role includes ~30% travel for in-person customer engagements.

Design, develop, and field high-performance Ground Control Station and C2 software using C++/Qt/QML and QGroundControl. Lead architecture and technical direction, mentor engineers, define APIs/ICDs, debug integration/latency issues, support field tests, implement post-mission debrief tools, and ensure interoperability with C2 standards.

As a Lead Mobile Developer, you will design and maintain iOS apps, mentor developers, optimize performance, and integrate with backend services while collaborating with cross-functional teams.

As a Senior Mobile Engineer, you'll lead the development of the iOS app using React Native, optimize performance, mentor junior developers, and maintain high code quality standards.

Design and implement complex, accessible front-end components and a reusable design system. Architect UI solutions, prototype interactions, mentor engineers, improve design-to-development workflows, and build performant, responsive interfaces and marketing pages for a legal AI platform.

The Senior Staff Software Engineer will architect Affirm's lakehouse analytics platform, lead data governance efforts, mentor engineers, and collaborate across teams to optimize data solutions using Snowflake and other big data tools.