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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Junior-Mid Backend Software Engineer - **Company:** Millennial Software - **Location:** United States - **Experience:** Starter - **Salary:** $95,000.0 - $180,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Automation of Tests, Microsoft Azure, C Sharp (Programming Language), Extract Transform Load (ETL), Database Applications, Software Debugging, Distributed Systems, Python (Programming Language), Key Management, Node.Js, NoSQL, Systems Development Life Cycle, Query Optimization, RabbitMQ, Secure Coding, Software Engineering, Data Streaming, Systems Integration, Strategies of Testing, Data Logging, Google Cloud, Cloud Platform System, Performance Testing, Kubernetes Helm Charts, Caching, Backend, Kubernetes, Low Latency, Apache Kafka, Graphql, Front End Software Development, Api Design, Data Pipelines, Docker, Golang - **Published:** August 28, 2026 - **Apply:** https://www.dice.com/job-detail/5f53ea45-2983-4daf-88f1-0e1ebd8a919d ## About the Role * Demonstrated experience building and operating production backend services and APIs. * Proficiency in at least one backend language (e.g., Python, Java, Go, C#, Node.js) and common frameworks. * Strong understanding of API design, authentication/authorization concepts, and service reliability. * Experience with relational and/or NoSQL databases, query optimization, and schema/data modeling. * Experience with messaging and queuing platforms such as Kafka, RabbitMQ, or similar. * Familiarity with testing strategies and CI workflows; comfort with debugging and incident triage. * Ability to collaborate cross-functionally and communicate technical decisions clearly. * Experience creating and maintaining Docker containers, Helm charts, orchestration platforms such as Kubernetes clusters, and using cloud infrastructure services (AWS/Azure/Google Cloud Platform). * Bachelor's degree in a related field or equivalent practical experience. * At least 2-10 years performing backend software engineering. * Active TS/SCI clearance. * Ability to work on-site at one of the following locations - Virginia: Fairfax, Chantilly, McLean, Sterling, or Colorado: Colorado Springs. Nice to have: * Experience designing distributed systems (caching, queues, streaming, idempotency, retries, circuit breakers). * Observability experience: metrics, logging, tracing; familiarity with SLOs/SLIs and incident response practices. * Experience with data pipelines, ETL/ELT, or search platforms. * Knowledge of security best practices (threat modeling, secrets management, secure SDLC). * Experience with performance testing and capacity planning. ## Description Millennial Software is seeking a Junior - Mid level Backend Software Developer to join our collaborative team supporting National Security. You'll design, develop, and support scalable APIs and services using a tech stack that power data-driven applications and enable mission-critical decisions. You will focus on backend architecture, data modeling, integrations, performance, and reliability while partnering with frontend engineers, analysts, and users., * Design, implement, and maintain backend services, APIs, and integrations that support product features. * Develop data models and persistence layers; ensure data quality, integrity, and performance. * Build reliable service-to-service communication and integration patterns (REST/GraphQL, messaging, streaming). * Apply secure coding practices and ensure appropriate authentication/authorization patterns. * Create and maintain automated tests (unit/integration) and participate in peer code reviews. * Diagnose and resolve production issues; improve reliability through monitoring, alerting, and runbooks. * Collaborate with frontend engineers and other stakeholders to define contracts and support end-to-end delivery. * Identify bottlenecks and drive performance improvements (latency, throughput, resource utilization). * Produce technical documentation for systems, APIs, and operational procedures. ## Related Videos - [Navigating the Future of Junior Developers in Tech](https://www.wearedevelopers.com/videos/1280-navigating-the-future-of-junior-developers-in-tech) - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Why Your Best Mediors Never Become Seniors (And How to Fix It)](https://www.wearedevelopers.com/videos/2108-why-your-best-mediors-never-become-seniors-and-how-to-fix-it) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market)