Top Senior Software Engineer Jobs in Portland, ME

Design, build, and maintain Python backend systems and AI/LLM workflows. Develop containerized applications with Docker and Kubernetes on AWS, create prototypes and production solutions, collaborate with data scientists and product managers, ensure security and testing best practices, and help evolve architectures and mentor teammates.

Own and evolve ClickHouse's Python connector and SDKs; build and maintain integrations with orchestration and transformation tools; design AI/LLM integration patterns (RAG, embeddings, feature stores); engage with open-source community; collaborate with Product and Cloud teams to prioritize and ship production-grade data integrations.

Own and deliver server-side features end-to-end for a cloud-hosted accounting SaaS: design data models and APIs, improve performance and reliability, mentor engineers, ensure observability and on-call readiness, collaborate with product and clients, and apply AI-assisted development safely to accelerate delivery.

The Senior Software Engineer role involves modernizing healthcare payment systems using C#, .NET, SQL, and cloud technologies while leveraging AI tools for efficiency.

Design and implement a high-performance, low-latency Java OLAP calculation engine core. Collaborate with product to translate designs into executable criteria, ensure correctness and performance, communicate technical concepts, and advocate for quality and robust JVM-level tuning and language/design improvements.

Lead test strategy and build scalable automated test frameworks for a custom Linux kernel. Validate performance, reliability, and security; develop test suites for kernel enhancements and VM software; debug low-level system issues; enhance CI/build automation; provide technical leadership and mentor junior engineers.

The Senior Software Engineer will architect and develop the Solver network, ensuring performance, collaborating with teams, and leading engineering standards.

The role involves leading frontend development, maintaining UI components, overseeing CI/CD pipelines, mentoring engineers, and enhancing application performance in collaboration with cross-functional teams.

The Senior Software Engineer leads design and development of scalable systems, oversees technical execution, mentors engineers, and ensures high-quality delivery in a cloud-based environment.

The Senior Software Engineer, Fullstack will lead product development by collaborating with teams, owning projects from inception to production, and ensuring high-quality code and system performance.

As a Senior Software Engineer, you'll ship quality software across the web stack, collaborate with product/design teams, and provide technical leadership within a small engineering team.

Lead architecture and delivery of scalable, secure web products. Collaborate with product and ministry stakeholders, guide vendors, review code, and ensure quality, security, and maintainability across platforms.

Lead and manage a high-performing engineering and DevOps team, developing software applications and cloud infrastructure, ensuring reliability and scalability.

As a Senior Applied AI Engineer at Vanta, you'll design and implement AI-powered features, mentor engineers, and ensure AI systems improve customer experience, leveraging LLMs and full-stack development skills.

The Senior Software Engineer will develop Flock's Video Management Software, focusing on low-latency live video and APIs while collaborating with cross-functional teams.

The Open Source Engineer will expand LanceDB's integration with big data systems, manage dataset operations, and enhance open-source community efforts.

The Staff Software Engineer will architect and implement core services and systems, provide technical leadership, and mentor engineers while focusing on scalable, high-performance software development.

Develop AI/ML-powered features in ClickHouse Cloud, focusing on frontend and API architecture, UI/UX, and integrations with AI systems.

The role involves building, testing, and deploying infrastructure software, mentoring teammates, collaborating with teams, and supporting software services.

As a Staff Software Engineer, you’ll lead the design and reliability of Duetto's data lakehouse, evolving data systems using Python and AWS, ensuring data quality, and implementing AI-driven solutions.

As a Senior Software Engineer, you will deliver software solutions for clients, teach agile practices, and ensure project success through collaboration. You will work directly with teams and clients to implement effective software development methodologies.

The Senior Software Engineer will build scalable backend systems, design APIs, and integrate ML models, enhancing Yahoo's search functionality.

As a Senior Full Stack Software Engineer at Orum, you will own product features end-to-end, design scalable systems, collaborate with cross-functional teams, and drive technical excellence while mentoring your teammates.

Build and improve backend systems (primarily DogByte) supporting hospital workflows. Own projects end-to-end from design to production, collaborate with Product, SRE, and DevSecOps, apply AI tools thoughtfully to developer workflows, and review cross-team work to ensure reliability, scalability, and maintainability.

Lead technical vision and architecture for a scalable virtual care platform. Architect and develop Ruby on Rails backend, build React front end, guide technical decisions, collaborate cross-functionally, drive adoption of new technologies, and contribute to long-term product roadmap while mentoring engineers.