Top Senior Java Developer Jobs in Denver & Boulder, CO

Lead development of scalable Java software applications and high-availability services. Design architectures, solve complex system challenges, improve performance and scalability, and maintain quality standards. Collaborate cross-functionally, mentor junior engineers, own technical initiatives, address support-driven issues, and implement robust testing practices for mission-critical IT operations products.

Design, develop, and enhance scalable Java software for NinjaOne’s IT Operations platform. Lead architectural decisions, build high-availability services, address scalability and technical debt, improve quality practices, collaborate across teams, mentor engineers, and own technical initiatives supporting millions of endpoints and servers.

Lead development of scalable Java applications and high-availability services. Design system architecture, solve complex scalability challenges, improve quality, mentor engineers, collaborate cross-functionally, and own technical initiatives supporting a global IT operations platform.

Develop and scale backend Java and Kotlin software powering patch discovery, packaging, and deployment across millions of endpoints. Design scalable systems, APIs, data structures, caching solutions, and relational databases while maintaining high testing and code-quality standards. Collaborate with AI workflow, server, platform, design, and product teams. Occasional React or Angular work may support patching workflows and dashboards.

Design, build, and support Amazon Connect contact flows, serverless Java/Python microservices, and React agent workspaces. Integrate LLM-powered agent assistance (Bedrock/RAG), secure REST APIs, and implement monitoring and reliability for enterprise contact center solutions.

Lead development of scalable Java backend applications and high-availability cloud services. Design architectures, REST APIs, databases, caching systems, and distributed session infrastructure. Mentor engineers, drive technical initiatives, address performance and scalability challenges, and uphold quality and automation practices for endpoint management products.

Designs and develops complex full-stack software systems using Java, JavaScript, Angular, Spring Boot, AWS, and related technologies. Provides technical leadership, mentorship, code reviews, and innovation while collaborating with business partners, architects, analysts, engineers, and technical leads. Translates business logic into technical requirements, works in an Agile Scrum environment, and creates developer-facing technologies and documentation.

Leads the design, development, modernization, and architecture of large-scale healthcare platforms using Java, Spring Boot, cloud technologies, microservices, and APIs. The role drives technical decisions, performance, scalability, security, code quality, and modern engineering practices. Responsibilities include mentoring engineers, conducting code reviews, collaborating across product, architecture, security, and operations teams, and delivering resilient applications. Preferred experience includes generative AI, full-stack development, GraphQL, Node.js, TypeScript, and modern databases.

Develop and maintain Java-based applications, integrations, workflows, and services supporting an Oracle Identity Manager IAM platform. Responsibilities include troubleshooting production issues, performing root cause analysis, developing SOAP and REST integrations, configuring connectors, supporting Oracle SOA workflows, assisting with upgrades and modernization, and maintaining security and change-management documentation. The role collaborates with government stakeholders and requires the ability to obtain an IT-II security clearance.

Develop and maintain enterprise Java web applications using Spring Boot, REST, SOAP, SQL, and Flyway. Lead secure software development across the SDLC, including CI/CD automation, testing, vulnerability scanning, production support, troubleshooting, and root-cause analysis. Collaborate on integrations, modernization, Agile delivery, technical documentation, and application architecture. Evaluate and implement AI-enabled capabilities while maintaining security and regulatory compliance. The role is remote and requires eligibility for Public Trust screening.

Develop and maintain advanced Windchill Java customizations using PTC APIs, services, listeners, workflows, JSP, TAM, queues, and background processes. Optimize performance, support upgrades and migrations, troubleshoot production issues, document solutions, conduct code reviews, collaborate with stakeholders, and mentor engineers. The role requires strong Java, Windchill internals, SQL, and enterprise platform engineering expertise.

Build and maintain enterprise workforce management software for forecasting, scheduling, adherence, intraday management, and reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, integrations, and PostgreSQL data models. Support cloud-native deployments, CI/CD, testing, performance optimization, production troubleshooting, architecture discussions, and client-facing collaboration.

Build enterprise-scale workforce management software covering forecasting, capacity planning, scheduling, adherence, intraday management, and operational reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, integrations, and PostgreSQL data models. Contribute to cloud-native deployments, CI/CD, testing, performance optimization, architecture, production support, and client-facing technical collaboration.

Design, develop, deploy, and maintain secure, scalable Java and Spring Boot services for a multi-tenant ecommerce SaaS platform. Build REST APIs, optimize MySQL data access, operate AWS workloads, and support CI/CD, observability, testing, and production troubleshooting. Contribute to architecture and technical decisions, mentor engineers, use AI-assisted development tools responsibly, and help maintain PCI DSS compliance.

Develop, modernize, refactor, test, integrate, and deploy mission-critical Java applications in classified DoD environments. Responsibilities include analyzing legacy codebases, building REST and gRPC services, integrating Oracle databases and enterprise messaging systems, creating Docker containers, supporting Kubernetes deployments, and owning technical deliverables through demonstrations. The role requires troubleshooting, documentation, runtime configuration, logging, and health monitoring for enterprise software systems.

Develop and maintain scalable customer-facing full-stack applications using Java, Spring Boot, Angular, REST APIs, and cloud technologies. Design software, automate testing, deploy applications, and support CI/CD pipelines. Collaborate with architecture, UX, and product teams in an Agile environment. Mentor junior engineers, conduct code reviews, improve development practices, and translate business requirements into technical solutions.

Leads and develops software engineering teams while remaining hands-on with Java and Spring Boot development. Responsibilities include setting architecture and technical roadmaps, delivering scalable enterprise applications, guiding Agile planning, improving CI/CD and DevOps practices, supporting production reliability, mentoring talent, and partnering with product and business stakeholders. The role manages hiring, performance, succession planning, and engineering excellence initiatives.

Leads and mentors a distributed Agile software team while remaining hands-on in architecture, Java and Spring Boot development, Angular applications, REST APIs, AWS infrastructure, containerization, CI/CD, databases, observability, security, and production troubleshooting. Translates customer requirements into technical solutions, drives engineering best practices, supports capacity planning and performance feedback, and oversees scalable, resilient enterprise applications using AWS, Docker, Terraform/OpenTofu, and modern software development practices.

Designs, develops, and deploys enterprise applications using Java, Spring Boot, microservices, REST APIs, cloud services, databases, DevOps tools, and Angular or React. The role also involves AI exposure with Python, LangChain, and LangGraph, along with application security, monitoring, performance, deployment, and collaboration with project teams. The position is onsite in McLean, Virginia.

Build and maintain scalable full-stack applications using React and Java or Python. Develop microservices, optimize high-throughput systems, resolve architectural and performance issues, and deliver production-grade software in Agile environments. The role includes end-to-end implementation ownership, cloud development, AI-assisted engineering, and mentoring or leading developers.

Develop and maintain Java applications, RESTful services, and Angular frontends using Spring Boot and NgRx. Deploy applications to cloud platforms, practice TDD, manage CI/CD with Jenkins, and work with Oracle and PostgreSQL databases. Participate in agile processes, collaborate with cross-functional teams, mentor engineers, and independently lead technical initiatives and feature delivery.

Design, develop, test, deploy, and support scalable cloud-native applications using Java, Spring Boot, React, TypeScript, Node.js, PostgreSQL, microservices, and REST APIs. Build CI/CD pipelines, containerized deployments, integrations, observability, and secure distributed systems. Troubleshoot production issues and improve performance, resilience, and maintainability while collaborating with product, UX, QA, DevOps, architecture, and engineering teams.

Build and scale low-latency ad-serving software handling billions of daily auctions. Responsibilities include developing data- and model-driven features, optimizing algorithms and architectures, reducing cloud costs, extending observability, supporting distributed infrastructure, participating in on-call rotations, and documenting systems and incident procedures.

Develop and architect scalable Java software for NinjaOne’s endpoint management platform. The role involves building high-availability services, leading technical initiatives, making architectural decisions, improving quality practices, collaborating cross-functionally, mentoring engineers, and addressing scalability, performance, and technical debt challenges.

Develop and scale backend patch-management software using Java and Kotlin for millions of endpoints. Implement enterprise software, design scalable systems, build REST services, work with relational databases and caching systems, and uphold rigorous testing and quality standards. Collaborate with AI workflow, server, platform, design, and product teams. React or Angular experience may support occasional frontend work.