Top Senior Software Engineer Jobs

Develop scalable backend services and APIs, create coding tasks and deterministic verifiers for AI systems, debug complex codebases, optimize performance, refactor legacy systems, implement features, and provide technical reviews and reasoning. The role is remote, contract-based, and part-time at 15–20 hours per week.

Develop LLM-powered automation and agent tooling for legacy code analysis and modernization. Build cloud-native migration services, scalable Spark and Databricks data platforms, ETL frameworks, data models, validation controls, and Airflow-orchestrated workflows. Reverse-engineer mainframe and database workloads, transform legacy logic into microservices, optimize MongoDB schemas, and implement near-real-time data synchronization. Requires extensive data engineering, cloud, Python, and AI framework experience.

Designs and leads enterprise backend systems, streaming services, distributed architectures, APIs, databases, Kubernetes deployments, and DevOps automation. The role also contributes to full-stack delivery, product ownership, technical prototyping, client presentations, and end-to-end application delivery while coordinating onshore and offshore teams.

Lead development and maintenance of internal design system libraries, tools, and Figma plugins. Implement AI solutions to speed design workflows, own medium-to-large features end-to-end, run internal user research, provide support and on-call coverage, conduct design and code reviews, and collaborate with designers and engineers to drive technical strategy and adoption.

Lead the architecture, development, testing, and maintenance of scalable backend systems and APIs. Drive technical decisions, code quality, performance optimization, documentation, continuous delivery, and monitoring. Collaborate with product, design, and engineering teams to translate requirements into reliable solutions. Mentor junior engineers, conduct code reviews, resolve complex technical issues, and contribute to agile development and overall technology strategy.

Senior Software Engineer supporting a U.S. Government customer by sustaining critical mission-related software and systems. The role requires extensive software engineering experience, strong communication, teamwork, and independent work. Candidates must hold an active or reinstatable TS/SCI with Polygraph clearance and U.S. citizenship. Key technologies include Hadoop, Accumulo, AWS, Terraform, Java, and Python. The position is based in Annapolis Junction, Maryland, with limited telework available after acclimation and training.

Develop and sustain mission-critical government software and systems as a senior Python engineer. Apply Python and related technologies including Kotlin/Java, Terraform, Elasticsearch, OpenSearch, and AWS. Work independently and collaboratively on software engineering projects, support customer mission needs, and contribute to reliable solutions using Agile development practices. The position requires a TS/SCI with Polygraph clearance and supports partial telework after acclimation and training.

Serve as the technical anchor for a cross-functional engineering squad building healthcare data platforms. Design and maintain Java Spring Boot, React, and Python data-processing applications; guide architecture, code quality, estimation, releases, integrations, and issue resolution. Build reliable data delivery pipelines, mentor peers, support Agile execution, and promote responsible AI-assisted development using tools such as GitHub Copilot.

Build and operate large-scale financial systems, distributed data platforms, and pipelines for Stripe. Responsibilities include translating fintech requirements into scalable software, leading multi-team technical projects, debugging production issues, analyzing complex datasets, supporting payment infrastructure, and improving data pipeline reliability through monitoring and automation.

Design, develop, debug, test, optimize, and maintain software applications supporting warfighter readiness. Build database structures and web interfaces, integrate components, document solutions, and use containerization technologies. Collaborate with Agile teams, contribute to technical decisions, maintain development traceability, and deliver solutions through sprint cycles. The role also involves mentoring developers, writing unit and integration tests, and applying CI/CD, Git, and DevSecOps practices.

Design, build, and maintain highly available application platforms with strong observability and reliability practices. Responsibilities include defining SLIs and SLOs, managing error budgets, improving alert quality, automating operational processes, reviewing architectures, and supporting incident response. The role also develops AI-assisted reliability tools using LLMs and machine learning for anomaly detection, root-cause analysis, and alert triage. It requires collaboration across engineering, operations, and product teams, along with technical knowledge sharing and leadership communication.

Design and develop high-performance optimization and scheduling systems for complex network-resource allocation problems. Translate network requirements into computational models, improve solution quality and scalability, and evolve solver architecture for reliability. Responsibilities include managing project priorities, designing, testing, debugging, and maintaining production software. Preferred experience includes numerical optimization, solver development, performance profiling, distributed or cloud computing, and telecommunications or networking.

We are looking for a Senior .NET Software Engineer to take ownership of features and drive architectural decisions while building AI-powered EMR software.

Leads and mentors a software development team while contributing hands-on with .NET, C#, SQL Server, and Azure applications. Oversees code reviews, testing, troubleshooting, cloud adoption, CI/CD, DevOps practices, workload planning, risk mitigation, and stakeholder collaboration. Conducts performance evaluations, supports developer growth, and promotes modern development methodologies and cross-functional communication. The role requires hybrid work with three office days per week.

Lead architecture and development of Python-based software for scientific analysis, visualization, data pipelines, machine learning, and internal workflows. Collaborate with researchers and engineers to deliver scalable production systems, integrate HPC and legacy C++ or Fortran code, optimize parallel and GPU-enabled workloads, and establish testing, documentation, CI/CD, and containerization practices. Mentor engineers and provide technical direction across research and experimental software projects.

Develop and maintain innovative cloud-based web and mobile applications using full-stack technologies. Responsibilities include designing RESTful APIs, working with databases and cloud platforms, implementing authentication and authorization, supporting CI/CD and containerization, troubleshooting issues, translating business requirements into technical tasks, mentoring engineers, and contributing within Agile development processes.

Develop and evolve distributed spacecraft ground-control systems using Elixir and OTP. Own features from design through production, establish fault-tolerant architecture, improve reliability and performance, maintain rigorous testing and code quality, mentor engineers, and collaborate across product, frontend, backend, operations, and astrodynamics teams. The role focuses on resilient, scalable services supporting satellite command and control, mission planning, data processing, and analysis.

Own end-to-end full-stack feature development across React/TypeScript interfaces and Elixir backend services for spacecraft modeling, simulation, and ground-control software. Drive architecture, technical debt reduction, performance, reliability, testing, API design, and production deployment. Mentor engineers, establish coding standards, collaborate with product, design, QA, operators, and astrodynamics teams, and deliver complex data-dense, real-time applications.

Leads software architecture and development for ASML machine applications, owning complex modules from design through integration, deployment, testing, and maintenance. Provides technical direction to 6–10 engineers through code reviews, architecture reviews, mentoring, and technical planning. Develops C#/.NET applications using WPF, XAML, and MVVM, while driving quality, performance, reliability, automated testing, CI/CD, dependency management, and cross-team architectural alignment.

Provides technical leadership for designing, developing, modernizing, testing, and supporting enterprise applications. Leads full-stack Java, Spring Boot, Angular, and React engineering; architecture and code reviews; database and API design; automated testing; CI/CD and DevSecOps practices; production incident troubleshooting; observability; and root-cause analysis. Mentors engineers and collaborates across architecture, product, UX, QA, DevOps, database, and operations teams.

Lead design and architecture of a cloud-centric, multi-tenant software + hardware product. Build distributed AWS-connected systems, mentor engineers, run design and failure-mode analyses, drive agile processes, collaborate with product/QA/app teams, and deliver high-availability solutions integrating cloud and on-site hardware.

Design, build, and improve distributed clearing and securities-finance systems supporting brokerage products. Own projects from ideation through deployment, develop reliable APIs and integrations, refine existing infrastructure, and participate in on-call operations. The role requires strong systems fundamentals, attention to detail, financial-markets interest, and ownership of production systems handling customers’ money.

Design and maintain high-performance real-time dashboards, HMI/SCADA interfaces, streaming UIs, and post-processing tools for high-throughput sensor telemetry. Define visualization architecture, rendering standards, testing practices, and operational best practices. Collaborate with data platform, controls, and test automation teams while debugging and optimizing the full rendering-to-data stack in safety-critical, 24/7 environments.

Design, develop, configure, test, debug, troubleshoot, document, monitor, and implement software systems. Analyze and resolve complex defects and incidents, define technical requirements, coordinate resources, lead initiatives, mentor junior engineers, provide technical guidance, and work independently on well-scoped and ambiguous problems. The role requires delivering complete solutions incrementally while contributing to software design strategies and collaborating with business and technical teams.

Design, develop, and operate distributed services for Azure Storage geo-replication. Improve durability, regional resiliency, failover readiness and disaster recovery. Collaborate across teams, analyze telemetry, diagnose production issues, act as a DRI, and leverage AI-assisted engineering tools to improve productivity and reliability.