Top Backend Engineer Jobs in Denver & Boulder, CO

The Back-end Engineer will develop and maintain services and APIs, design data models, and contribute to system stability, collaborating with other engineers and product managers.

The Backend Engineer will develop infrastructure for product integration, create documentation for team training, and influence technology decisions.

Develop a platform for liquidity and loan collateralization. Responsibilities include building and integrating data pipelines, creating user experiences, and collaborating with teams for system design.

As a Backend Engineer, you'll design and implement systems for decentralized applications, enhance scalability, and collaborate with the team.

The Software Engineer, Backend Engineer will develop, automate, and maintain core functionalities for Rescale customers, focusing on backend systems and cloud services.

Define technical direction and architect systems for high-performance, scalable infrastructure. Mentor engineers and drive architectural decisions. Manage large-scale data ingestion and retrieval.

The Staff Backend Engineer will lead the Gatekeeper system, focusing on performance, reliability, and operations while collaborating with service teams to enhance overall system durability and security.

The Staff Backend Engineer will architect high-throughput streaming systems, define technical direction, mentor engineers, and solve complex problems for Helius' core products.

Lead architecture, delivery, and operation of large distributed telemetry databases. Define technical strategy, SLOs/SLIs, and reliability practices; drive performance, cost, and observability improvements; lead incident response and cross-team projects; mentor engineers; and represent engineering to stakeholders.

Build, operate, and own cloud-native backend services and platform infrastructure (primarily in AWS) to enable data pipelines, analytics, and application workloads. Write production Python code, implement IaC (Terraform/CloudFormation), deploy containerized workloads, design observability and CI/CD, participate in on-call rotations, and collaborate cross-functionally to ensure reliability, security, performance, and cost efficiency.

Lead the design and development of scalable Python backend services and APIs on AWS, mentor engineers, and manage PostgreSQL databases in a healthcare technology environment.

Design, build, and operate scalable, reliable backend services and event-driven systems for Fetch's ads, rewards, and offer platforms. Own APIs, eligibility and attribution logic, reward fulfillment, observability, platformization, and cross-functional architecture decisions to support high-throughput consumer experiences and revenue-generating systems.

Design, build, and operate backend systems for prediction markets, including order management, trade matching, settlement, and market resolution. Architect distributed, low-latency systems with strict financial correctness, lead multi-quarter technical projects, mentor engineers, and collaborate with Product, Compliance, and Risk to meet regulatory requirements.

The Senior Backend Engineer II will design, build, and maintain backend services for financial workflows, collaborating with product and engineering teams to enhance system reliability and performance.

Design, build, and own backend services for prediction markets across market lifecycle: creation, trading, oracle resolution, settlement, and payouts. Build low-latency, high-throughput microservices and event-driven systems, drive reliability via SLOs and observability, lead incident response, set technical standards, and mentor engineers while partnering cross-functionally to deliver product and compliance-aligned roadmaps.

Design, build, and maintain secure, scalable serverless microservices, APIs, and data pipelines on AWS. Optimize databases and queries, manage IaC with Terraform, automate CI/CD, monitor systems (Sentry/CloudWatch), participate in on-call rotation, and collaborate across teams to improve data ingestion, reliability, and performance.

As a Senior Software Engineer, you will enhance data pipelines, integrate with EHR systems, and mentor fellow engineers while ensuring scalable and reliable solutions for health technology.

As a Backend Staff Engineer, you will lead technical standards, mentor junior engineers, conduct code reviews, and drive feature development in a fast-growing on-demand services environment.

The Lead Engineer will design and manage scalable web applications and collaborate with cross-functional teams to implement high-quality software for BigFuture. Responsibilities include architecture definition, mentoring, and leading Agile ceremonies while exploring technologies like AI.

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

As a Back End Engineer, you will develop core financial systems, manage APIs, and optimize architecture while collaborating across teams.

Lead and oversee full stack applications for Yahoo Search, ensuring architectural integrity and code quality while mentoring engineers and collaborating with cross-functional teams.

Lead backend and full-stack work on the Payments team, building multi-gateway integrations (Stripe, PayPal), payment APIs, and customer payment UIs. Ensure secure, compliant (PCI-DSS) payment flows, reliability, observability, and scalability across AWS/Kubernetes microservices. Partner cross-functionally to design architecture, implement settlement/reconciliation, and maintain high availability.

Nango is hiring Senior and Staff Backend Engineers to design, build, and optimize backend systems and APIs, collaborating with customers and driving product strategy.

As a Backend Engineer, you will own end-to-end backend systems, build reliable APIs on Node and AWS, and implement scalable architectures. You will be responsible for high-quality production code delivery, establish best practices, and interface with product teams to enhance financial product performance.