Top Senior Software Engineer Jobs in Portland, ME

Develop and maintain software applications, ensuring code quality and collaborating with teams to design solutions. Lead and mentor junior engineers and improve development practices.

Design and deliver complex backend systems and APIs in a Kubernetes environment. Drive architectural initiatives, ensure rigorous testing and reliability, optimize data storage with PostgreSQL/Redis/Elasticsearch, contribute to Kotlin and Rust codebases, mentor engineers, and collaborate with product and stakeholders to address customer pain points.

Lead design, architecture, and hands-on implementation of scalable healthcare SaaS systems. Drive interoperability (HL7, FHIR, EDI), mentor engineers, liaise with stakeholders, manage technical risk, and ensure quality, performance, security, and innovation.

Lead the architecture of Commerce Hub by defining core domain models, building intricate systems, and mentoring engineers while influencing product strategy.

As a Senior Software Engineer, you'll build applications, APIs, and SDKs for AI agent interactions in finance. You will develop core products, enhance payment systems, and support decentralized AI coordination.

As a Senior Software Engineer, you'll optimize distributed databases, focus on query efficiency, and collaborate on SpiceDB features, enhancing performance and reliability.

Design and build core LLM platform primitives, safety and observability infrastructure, provider abstraction and evaluation systems, prompt lifecycle and Agent-as-a-Service; collaborate with product teams, document reference implementations, and lead technical standards to enable other engineers to build production AI features.

As a Senior Software Engineer at Flex, you'll design and maintain financial services architecture, mentor junior engineers, and ensure scalability and security for innovative financial products.

As a Staff Software Engineer, you'll lead the design and implementation of our interoperability engine, collaborate with product teams, mentor peers, and ensure high-quality data exchange in healthcare.

Build and improve application and developer infrastructure for a FedRAMP-high US environment: support US-specific hosting/on-call, enhance auth/RBAC, feature-flag tooling, CI/CD, monitoring, and developer experience while collaborating across engineering teams.

The Senior Software Engineer will develop products for creators focusing on growth and monetization, improving user experiences, and overseeing feature delivery from concept to launch.

Technical leader designing scalable APIs and agent interfaces for autonomous advertising agents. Build high-throughput real-time systems, evaluate agent protocols, drive architecture, mentor engineers, and integrate external ad platforms.

The Senior Software Engineer will design, develop, and operate critical software services, improving reliability and performance while collaborating with PMs and Designers to deliver customer-focused solutions.

The Senior Software Engineer leads the development of cloud-based software solutions, ensuring high-quality delivery, mentoring junior engineers, and refining technical processes.

The role involves designing, building, and operating platform services, mentoring engineers, and utilizing AI tools in workflows. Candidates should have extensive backend experience and system design knowledge.

As a Senior Software Developer, you'll design and deliver software solutions that enhance patient access to medications, collaborating with cross-functional teams.

Lead technical design and delivery of complex integrations, ensuring systems are secure, maintainable, and observable. Collaborate with teams for architectural decisions and improve integration efficiency.

The Staff Software Engineer will develop user experiences and APIs for banking applications, focusing on code quality, system design, and team mentorship.

As a Senior Software Engineer for iOS at Playlist, you will lead and mentor, collaborate with product and design, and enhance iOS development processes while shipping apps and improving architectures for scalability.

The Staff Software Engineer will design and implement user-facing features, architect systems, ensure code quality, and integrate modern tools in a fast-paced environment.

Design and implement solutions for a scalable AI platform. Troubleshoot technical issues and ensure software quality through testing and architecture improvements.

The Senior Software Engineer role involves designing, developing, and maintaining full-stack serverless systems, collaborating with teams, mentoring peers, and driving software solutions for injury management.

The Staff Software Engineer will lead technical projects, develop full-stack software, mentor teams, and drive product direction at Propel, focusing on impactful solutions.

The Senior Software Engineer will design and build scalable applications, work independently on technical challenges, and collaborate across teams to enhance healthcare pricing systems.

The Senior Software Engineer II will lead complex projects, mentor engineers, and create scalable applications using Python and modern web technologies, contributing to healthcare solutions.