Senior Backend Developer jobs in Longmont, CO

Senior Backend .NET Developer with Automation Experience

Remote

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3d ago

Job Title: Senior Backend .NET Developer Location: Remote Duration Contract through end of 2027 Job Description: Location Position Overview Client is seeking two experienced Senior Backend .NET Developers to join a team focused on improving and modernizing the prior authorization process for specialty care. The team is working to make prior authorization reviews faster and more efficient, reducing delays for providers and helping patients receive appropriate care sooner. The work will focus on i

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Contract

$60 - $70

Senior Java Backend Developer

Remote

•

19d ago

Senior Java Backend Developer Location: Remote must work Pacific Time (PST/PDT) hours Experience: 8+ years Employer: ZAPCOM Role Overview ZAPCOM is seeking a Senior Java Backend Developer to support a client engagement. The ideal candidate will have strong hands-on experience building scalable backend services, developing REST APIs, and delivering reliable applications in a distributed environment. Key Responsibilities Design, develop, and maintain backend applications using Java and Spring Boo

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Full-time

100,000 - 130000

Senior Backend Software Engineer

Boulder, Colorado

•

Today

The Role: Due to team growth, we are seeking an experienced Software Engineer to join our Sat OS team, which develops the high-level operating system and file transfer layer for the spacecraft The successful candidate will play a crucial role in developing software for our satellite systems, contributing to the expansion and enhancement of our space and ground-based data transfer capabilities. Ideal candidates will embrace the commercialization of nanosatellite systems and adapt to low-cost, fa

Full-time

USD 130,000.00 - 171,000.00 per year

Senior Backend .NET Developer

Remote

•

Today

Job Title: Senior Backend .NET Developer Job Location: Remote Job Type: Full Time Job Description: Develop backend services and REST APIs using C# and .NET. Build business and domain logic using SOLID and Clean Architecture principles. Work with Entity Framework Core, LINQ, SQL Server, and Azure SQL. Design integrations with enterprise and third-party systems. Implement asynchronous processing, background services, and messaging. Work with Azure Service Bus and other messaging technologies. I

Full-time

Lead Developer Java Backend

Remote

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3d ago

Job Description: Lead Java Backend DeveloperJob Title: Lead Java Backend Developer Experience: 8+ Years Job Type: Full-Time / Contract Location: Open to All Locations Across the USA Work Model: Onsite / Hybrid / Remote (Based on Client Requirements) Job SummaryWe are seeking an experienced Lead Java Backend Developer to lead the design, development, and implementation of scalable, high-performance backend applications. The ideal candidate will have strong expertise in Java, Spring Boot, microser

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Full-time

55 - 60

Senior Backend Service Maintenance Engineer

Remote

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3d ago

Job Description: Senior Backend Engineer Service MaintenanceRole: Senior / Lead Backend Engineer Mode: Remote Key ResponsibilitiesMaintain and support production backend services, including incident triage, troubleshooting, and recovery. Perform service upgrades, security patches, dependency updates, and cloud infrastructure migrations. Monitor and optimize service reliability using alerts, logs, and dashboards. Reduce alert noise, resolve technical debt, and safely decommission unused services

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Contract

Depends on Experience

Backend Developer - Node JS/ TypeScript / React / AWS

Remote

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16d ago

Position: Senior Backend Developer Node.js / TypeScript / React / AWS Company : Yottaflex AI Technologies Location: Remote Employment Type: Contract Duration: 612 Months (Potential Extension) Job Description We are looking for a highly experienced Senior Full Stack Developer with strong hands-on Node.js and TypeScript backend development experience to design, develop, and deploy scalable enterprise applications. The ideal candidate must be backend-strong while also having solid experience with

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Third Party, Contract

Depends on Experience

Senior Lead Software Engineer, Backend

Remote

•

Today

At DraftKings, AI is becoming an integral part of both our present and future, powering how work gets done today, guiding smarter decisions, and sparking bold ideas. It's transforming how we enhance customer experiences, streamline operations, and unlock new possibilities. Our teams are energized by innovation and readily embrace emerging technology. We're not waiting for the future to arrive. We're shaping it, one bold step at a time. To those who see AI as a driver of progress, come build the

Full-time

USD 160,700.00 per year

Django Backend Lead Developer

Remote or North Carolina

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Today

Job Title: Django Backend Lead Developer Location: Jersey City, NJ/Charlotte, NC (Remote) Job Summary We are seeking an experienced Django Backend Lead Developer to join our team. The ideal candidate will have a strong background in backend development, cloud technologies, and big data processing. This role involves leading technical projects, mentoring junior developers, and ensuring the delivery of high-quality solutions. Key Responsibilities Lead the development of backend systems using Djang

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Contract

Senior Software Engineer, Backend | Audit Product Team

Remote

•

Today

Machinify is a leading healthcare intelligence company with expertise across the payment continuum, delivering unmatched value, transparency, and efficiency to health plan clients across the country. Deployed by over 85 health plans, including many of the top 20, and representing more than 270 million lives, Machinify brings together a fully configurable and content-rich, AI-powered platform along with best-in-class expertise. We're constantly reimagining what's possible in our industry, creatin

Full-time

USD 200,000.00 - 230,000.00 per year

Lead : Python Backend Developer (Healthcare / Claims)

Remote

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12d ago

Lead Python Backend Developer AWS & AI (Healthcare / Claims) Position: Lead Python Backend Developer AWS & AI Experience: 12+ Years Employment Type: Full-Time Domain: Healthcare / Health Insurance / Claims Mandatory About the Opportunity We are looking for a strong hands-on Python Backend Development Lead with extensive experience in AWS Cloud, Microservices, Distributed Systems, and AI-Assisted Development. The ideal candidate must have deep expertise in Python backend engineering, experie

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Full-time

Depends on Experience

Lead : Python Backend Developer (Healthcare / Claims)

Remote

•

11d ago

Easy Apply

Full-time

Depends on Experience

Senior Backend Software Engineer

Remote or San Francisco, California

•

Today

Senior Backend Software Engineer Company Description Swish Analytics is a sports analytics, betting and fantasy startup building the next generation of predictive sports analytics data products. We believe that oddsmaking is a challenge rooted in engineering, mathematics, and sports betting expertise; not intuition. We're looking for team-oriented individuals with an authentic passion for accurate and predictive real-time data who can execute in a fast-paced, creative, and continually-evolving

Full-time

USD 150,000.00 per year

Senior Backend Engineer

Remote or Stamford, Connecticut

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Today

RESPONSIBILITIES: Kforce has a client near Stamford, CT that is seeking a Senior Backend Engineer who will work across engineering, product, analytics, and operations to architect durable serverless systems, develop clean and reliable Python services, and power mission-critical workflows such as claims processing, eligibility ingestion, episode creation, provider search, and care coordination. Location: Remote within the U.S. The team is based near Stamford, Connecticut, and candidates must be

Full-time

$150,000 - $190,000 annually

Senior Backend Engineer

Remote or Nashville, Tennessee

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Today

RESPONSIBILITIES: Kforce has a client that is seeking a Senior Backend Engineer who will work across engineering, product, analytics, and operations to architect durable serverless systems, develop clean and reliable Python services, and power mission-critical workflows such as claims processing, eligibility ingestion, episode creation, provider search, and care coordination. Location: Remote within the U.S. The team is based near Stamford, Connecticut, opening an office soon near Nashville, TN

Full-time

$150,000 - $190,000 annually

Senior Backend Engineer

Remote

•

Today

Who we're looking for As a Senior Backend Engineer, you'll be joining an impactful team of highly skilled engineers who are building the core platform features and services to fuel our rapidly growing company! As a team, we are always working to continuously improve both our product and our craft. The Backend team will focus on developing world-class services and integrations, all the while ensuring to keep our apps secure, high-performing, and most importantly scalable (we're growing!). We're l

Full-time

USD 170,000.00 - 195,000.00 per year

*Senior Full Stack Engineer (Backend focused - Nodejs, Javascript, AWS exp.) - W2 role

Remote

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13d ago

Kellton Tech is a full-service software development company, offering end-to-end IT solutions, strategic technology consulting and product development services in Web, SMAC (Social, Mobile, Analytics, Cloud), ERP-BPM, and IoT space Our methodology of inventing infinite possibilities with technology helps us develop best in-class and cost effective solutions for our clients. Currently Kellton Tech is looking for talented resources for one of our listed client. Below are the position details Posi

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Contract, Third Party

Depends on Experience

Senior Backend Software Engineer

Remote or San Francisco, California

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Today

Overview Working at Atlassian Atlassians can choose where they work - whether in an office, from home, or a combination of the two. That way, Atlassians have more control over supporting their family, personal goals, and other priorities. We can hire people in any country where we have a legal entity. Responsibilities What You'll Do: Drive large, complex projects autonomously, from technical design to launchTackle complex architecture challenges, apply architectural standards and start using

Full-time

USD 180,000.00 - 235,000.00 per year

Senior Backend Engineer, Platform Enablement

Remote

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Today

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier

Full-time

USD 156,800.00 - 235,200.00 per year

Senior Backend Engineer | Accounts Receivable

Remote or New York, New York

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Today

About Ramp Ramp is building the smart infrastructure for finance teams, embedded in the transaction flow of every dollar a business spends. We automate how over $275B in annualized spend flows in and out of 85,000+ companies: authorizing payments, flagging risk, categorizing spend, and closing books. The problems are high-stakes, data-dense, and unforgiving. We hire people with high agency and high urgency. We look for slope over intercept. We care less about where you trained and more about

Full-time

Senior Backend Developer jobs in Longmont, CO, USA