Top Senior Backend Engineer Jobs in Denver & Boulder, CO

Build and maintain resilient backend systems, participate across the product development lifecycle, collaborate with product and design, raise engineering standards, think through system lifecycles and failure modes, and contribute broadly at an early-stage fintech. Work primarily with backend technologies (Go preferred) and cloud/datastore tools.

The Senior Software Engineer will design and develop backend systems and APIs, mentor other engineers, and resolve complex integration challenges in healthcare technology.

The Senior Software Engineer will develop backend systems, mentor engineers, and collaborate with cross-functional teams while contributing to product features and roadmaps.

The role involves back-end development using .NET Core and SQL, contributing to Jibble 2.0 API integrations, and collaborating with product and design teams.

The Senior Back-End Software Engineer designs, develops, and maintains scalable backend systems while taking ownership of the software development lifecycle.

Lead the design, development, testing, optimization, monitoring, and maintenance of scalable backend systems and APIs. Build production-grade solutions for blockchain and DeFi use cases, conduct code reviews, document technical processes, troubleshoot complex problems, and mentor junior developers. Collaborate with frontend, product, and design teams while maintaining high availability, security, performance, and code quality across the Node.js and TypeScript technology stack.

Own the architecture and operation of backend infrastructure supporting high-volume crypto trading. Build real-time pipelines for order books, trades, and market events; design GraphQL and WebSocket APIs; manage PostgreSQL, Redis, and ClickHouse data systems; optimize latency, caching, schemas, and queries; monitor reliability; debug performance issues; and collaborate with frontend and mobile teams.

Build and extend scalable backend API integrations for the Hyperliquid ecosystem, supporting same-chain and cross-chain trading, routing, orderbooks, TWAP, and perpetuals. Collaborate with product managers and backend engineers on system design, feature proposals, code reviews, documentation, and reliable infrastructure. The role requires strong TypeScript backend experience, EVM integration knowledge, familiarity with Hyperliquid protocols, and comfort working independently in a remote team.

Design, build, and own backend systems for blockchain and staking infrastructure. Implement APIs, Ethereum data pipelines, indexers, validator integrations, and operational tooling. Lead architecture, testing, deployment, observability, mentor engineers, and drive engineering standards and AI-assisted workflows.

As a Senior Software Engineer (Backend), you will design and implement scalable applications, collaborate with agile teams, and mentor junior members while ensuring high code quality and performance.

Design, implement, and maintain Python backend services and scalable data pipelines using dataframes, Parquet, and Databricks. Optimize distributed processing, build APIs, ensure data quality and observability, and mentor engineers.

As a Senior Backend Developer at Awarri, you'll build and maintain backend systems for AI platforms, focusing on scalable architectures, data integration, and real-time communication.

As a Senior Backend Engineer, you'll develop and maintain the Dynamic Copay Engine's services, design pricing logic, and manage data integrations, focusing on backend systems for health insurance functionality.

Lead development of Python-based web applications using Django and FastAPI, architect scalable solutions, and establish technical standards while mentoring developers and optimizing infrastructure.

Design, build, and operate identity and access systems, financial operations (transfers, ledgering, reconciliation), and blockchain infrastructure. Define reliability/observability standards, lead cross-functional projects, mentor engineers, and uphold security and transactional correctness.

As a Senior Backend Engineer at Eight Sleep, you will develop and maintain back-end services and improve data processing, supporting critical business logic in distributed systems.

The Senior Back-End Software Engineer will design and implement a serverless platform, work closely with the product team, and own entire projects, driving innovation in telehealth.

Join Vanta as a Senior Software Engineer to lead and mentor teams, driving projects on identity systems and improving security infrastructure.

Lead backend architecture and implementation for Java Spring microservices, validate and own AI-assisted code, mentor engineers, collaborate with product to deliver features, and drive technical excellence and scalable, test-covered systems.

Design, build, and operate distributed, data-intensive backend systems and pipelines. Own production data infrastructure (streaming, batch, analytical stores), debug production incidents, participate in on-call rotations, partner with product and frontend teams, write/review architecture and code, and improve observability, reliability, and deployment practices.

Lead the design, development, and deployment of software solutions to combat identity fraud, mentor junior engineers, and ensure high-quality products.

Responsible for designing, building, and operating AI-powered features, scalable APIs, and maintaining integrations within ClickHouse's AI/ML ecosystem.

Develop and operate a live DeFi order book DEX protocol, combining backend, blockchain, and full-stack coding with DevOps and operational process improvements. The role requires understanding the complete protocol stack, resolving technical blockers, collaborating with product teams, estimating development work, and balancing short-term priorities with long-term goals.

Design blockchain architecture and modular node components, develop blockchain and DeFi protocols, operate servers and blockchain nodes at scale, and modify node software. The role requires proficiency in two specified programming languages, experience with cloud infrastructure and blockchain systems, meaningful open-source contributions, strong self-direction, and availability to work Pacific Time hours.

Design, build, and operate scalable backend services and APIs for LaunchDarkly’s experimentation platform. Own systems supporting experiment setup, event ingestion, metric computation, and results processing. Contribute to architecture, reliability, observability, deployment safety, incident response, and technical direction. Collaborate with product, design, data science, and engineering teams, investigate production issues, participate in on-call, and mentor teammates through reviews and knowledge sharing.