Top Senior Software Engineer Jobs in Baltimore, MD

Design, develop, test, debug, and deploy secure national-security mission applications. Integrate front-end and back-end systems, collaborate with government developers, follow Agile practices, and maintain performance and security standards for cleared software environments.

Design and implement CIAM backend services for authentication and authorization. Integrate identity systems, manage secure flows, and automate infrastructure.

Own and evolve the Subscriptions and Payments backend: design APIs, integrate providers, improve reliability and scalability, lead architecture and code reviews, collaborate cross-functionally, and participate in on-call rotations.

As a Billing & Analytics Software Engineer, you'll design and maintain the billing pipeline, integrate billing systems, and develop customer-facing analytics dashboards to support revenue recognition and operational observability.

Design, develop, test, and maintain complex software systems for intelligence and analytics applications. Implement RF signal processing, analytics, visualization, and integrate new and legacy software across varied hardware. Contribute to system-level design, perform code reviews and testing, and resolve software problem reports.

Maintain and improve GameChanger's backend API server and SDK. Implement API/SDK changes, improve developer ergonomics, optimize performance and scalability, design critical systems, document and mentor teammates, and participate in on-call rotation.

Design, implement, and maintain partner integration solutions; translate partner requirements into scalable technical implementations; troubleshoot and automate fixes; collaborate with product and engineering teams to improve tools and ensure successful partner onboarding and launches.

Lead design and delivery of scalable customer-facing features, services, and APIs that process real-time data and AI-powered insights. Build web experiences, contribute to LLM/AI workflows, ensure reliability through observability and rollout practices, and collaborate cross-functionally with Product, Design, ML, and platform teams.

Build and evolve Circle Discover marketplace features: high-converting purchasing flows, algorithmic recommendations, content feeds, and listings. Work across a Ruby on Rails backend and React/Next.js front-ends, optimize performance and SSR/SSG, collaborate with designers and leaders, and improve codebase quality while shipping at pace in a distributed remote team.

Build and operate high-throughput backend services powering AI agent orchestration, connector integrations, and real-time data pipelines. Design scalable core platform services, collaborate with ML, frontend, and product teams, implement infrastructure-as-code and CI/CD, and mentor junior engineers to deliver reliable, AI-powered features.

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

Build and own Eve's marketing site and GTM engineering stack: integrate and optimize external tools, design AI agents for sales and marketing, implement webhooks and middleware to sync product/CRM data, and create programmatic campaigns and internal tools in partnership with Marketing, Sales, RevOps, and Product to drive growth and automation.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

As a Senior Software Engineer in Trust & Safety, you'll analyze threats, design systems for abuse detection, and collaborate with teams to implement scalable defenses.

Design, develop, and deliver mission-critical server-side and UI software within a SAFe DevOps environment. Use TDD/BDD and CI/CD to implement secure Java (and multi-language) solutions, integrate databases and services, and automate testing for high-assurance defense programs requiring an active TS/SCI with polygraph.

Design, build, and maintain scalable, reliable full‑stack systems. Contribute to API and architecture design, write testable code, debug complex issues, improve performance, automate deployments, and mentor junior engineers while collaborating with cross‑functional teams.

Plan and execute upgrades and modernization of enterprise Java applications in secure government environments. Develop and maintain Java/Python components on Windows VMware, migrate and optimize Apache Solr indexes with Zookeeper, manage Tomcat, integrate with Oracle 19c and SAP BI, use Apache Directory Studio, apply secure coding practices, collaborate with security/infrastructure/business teams, document designs and procedures, and participate in code reviews.

Build, enhance, and maintain web applications using JavaScript/CSS/HTML and modern frameworks; collaborate with designers, backend engineers, and data scientists; interact with REST APIs; troubleshoot customer issues; perform code reviews, write unit tests, and conduct QA.

Senior Full Stack Software Engineer responsible for developing Java Spring Boot microservices and cloud-based full-stack applications. Work includes Python for AWS automation, building REST APIs, implementing CI/CD with Maven/GitLab/GitOps, and collaborating in Agile teams to sustain mission-critical government systems.

Support a U.S. Government customer by researching, developing, installing, integrating, evaluating, enhancing, testing, validating, sustaining, and troubleshooting cloud-based mission software and systems. Perform requirements analysis and provide engineering services for cloud, big data, and analytics solutions in an Agile environment.

Build and maintain developer-facing tools and APIs for MongoDB Atlas and Compass. Work full-stack on customer-facing UIs and backend services, design scalable, highly available web applications, collaborate cross-functionally, troubleshoot distributed systems, and improve performance and developer experience.

Lead design, development, testing, and maintenance of complex, performance-driven software systems. Provide technical leadership across teams, guide architecture and technology selection, oversee development and operational readiness, debug and optimize systems, create documentation, and coordinate with stakeholders and engineers to meet mission requirements.

Design, develop, integrate, and test embedded flight/payload software on an agile team. Implement, debug, and review C++/Linux software, perform cross-compiling, use configuration management, and support hardware integration and test activities onsite.

Develop, sustain, and troubleshoot GHOSTGEM software suite; implement, test, and integrate applications with COTS/GOTS/FOSS; write scripts, build containerized services, use CI/CD, and support deployments on Kubernetes.

Design, build, and maintain data workflows and automation pipelines using Apache Airflow. Develop scalable, observable orchestration solutions integrated with Apache Spark, containers, and CI tools. Collaborate with data engineers and platform teams to ensure secure, production-ready workflows and automate operational processes via scripting and tooling.