Top Senior Software Engineer Jobs in Portland, ME

As a Senior Implementation Engineer, you'll own technical projects, enhance the Java codebase, automate processes, integrate systems, and collaborate with customers on infrastructure design.

Seeking a Senior DevOps Engineer for OpenSesame, focusing on CI/CD pipelines, cloud infrastructure, and automation. Responsibilities include improving developer experience and mentoring teams.

The Senior HPC Cluster Engineer will optimize GPU clusters, troubleshoot InfiniBand networks, integrate new hardware, enhance automation systems, and manage GPU devices in HPC environments.

Design, build, and launch reliability engineering projects to scale production services. Improve scalability, observability, secrets/configuration management, canary-based deployments, and deployment safety. Partner with teams, support critical services, participate in on-call rotations, and promote reliability best practices.

Own end-to-end frontend development for core crypto payment flows across web and mobile. Improve latency, availability, and SLOs; build user-facing features (contacts, real-time transaction status); identify and fix performance bottlenecks; partner with product/design/backend; mentor junior engineers to reduce customer friction at scale.

Lead design and delivery of major product areas across web and mobile. Build and improve React/React Native apps, design scalable systems and data models, optimize performance, mentor engineers, set engineering standards, and collaborate with cross-functional stakeholders in a fully remote environment.

Build and scale full-stack systems to improve provider onboarding and supply; design distributed, maintainable services; lead high-priority projects; mentor engineers; integrate AI-assisted and LLM-based features; drive provider-facing product quality and reliability.

Build and maintain scalable, cloud-native full‑stack features and services. Collaborate with Product and Design to prototype, deliver, and document solutions. Work across backend and frontend, apply modern engineering practices, mentor teammates, and own product domains to improve transit operations.

Develop, test, and maintain a complex distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements. Work with distributed workloads (Spark/Hadoop), SQL/Snowflake, AWS, shell scripting, and job scheduling/process automation. Support delivery under Agile/SAFe practices and ensure alignment with program standards.

Lead complex software projects, mentor engineers, and set technical direction at Vanta while contributing to security and compliance solutions.

As a Senior Software Engineer, you will enhance data pipelines, integrate with EHR systems, and mentor fellow engineers while ensuring scalable and reliable solutions for health technology.

The Senior Search Engineer will focus on improving the search system for Vannevar's product, collaborating with engineers to leverage full-text search and emerging technologies, and enhancing user experience by improving search latency and relevance.

The Senior Full Stack Software Engineer will design and develop software solutions, collaborate on product ideation, and improve tooling. They'll work autonomously to build an exceptional product in the fintech space.

The Senior Back-End Software Engineer will design and implement a serverless platform, work closely with the product team, and own entire projects, driving innovation in telehealth.

The Power Systems Software Engineer will develop high-fidelity power flow models, validate them against customer data, and enhance the architecture for solver performance in grid simulations.

Develop backend services and processing pipelines for healthcare data, integrate AI components, ensure high-quality deliverables, and maintain observability in systems.

Design and build the control plane for Postgres clusters, ensure data protection, automate database operations, and collaborate with customers to enhance the platform.

The Senior Software Engineer will develop high-performance software for executing open-source LLMs on custom hardware, focusing on optimizations and efficient libraries primarily in C++.

As a Senior Frontend Software Engineer, you'll develop user-facing features using React and TypeScript, ensuring performance and cross-device compatibility while collaborating with teams to maintain a component library.

As a Senior Mobile Engineer, you will develop high-performance mobile features using React Native and TypeScript, collaborating closely with designers and engineers to enhance user experiences.

As a Senior Full Stack Software Engineer, you will build and improve products, create user interfaces and APIs, and collaborate with various teams to enhance the customer experience.

The Senior .NET Software Engineer will drive development of .NET software products, focusing on back-end engineering, code reviews, and collaborating with cross-functional teams.

Design, develop, implement, test, and support high-quality internal software and customer-facing products. Enhance existing products and design APIs that integrate systems. Ensure security measures and perform code testing and reviews.

The role involves delivering solutions to technical problems, optimizing APIs, transforming requirements into tasks, mentoring, and participating in hiring.

The Software Engineer will manage data collection, optimize cloud infrastructure for data ingestion, and collaborate with AI researchers to enhance datasets for model training.