Top Senior Software Engineer Jobs in Portland, ME

Design and evolve systems for Motion's infrastructure, focusing on reliable and secure operations across APIs, Linux systems, and cloud environments with a focus on hands-on coding and engineering judgment.

As a Senior Backend Engineer, you will enhance Postscript's Fondue product by architecting scalable systems, driving decoupling, and implementing AI-first development practices while collaborating across teams.

The Senior Software Engineer will design and maintain backend systems, develop APIs, solve performance issues, and mentor junior engineers.

The Senior Software Engineer will design and build fullstack features using Go, React, and Ember, ensuring optimal customer experiences and system scalability while mentoring peers and driving projects.

The Principal Software Engineer will lead the Databricks platform on AWS, managing administration, design, security, and user enablement while mentoring a team.

Build and maintain MyHealthTeam social networks as a full-stack engineer. Work with Product in an agile, test-driven environment, manage production AWS services, and contribute across front-end and back-end systems.

The Senior Software Engineer will design high-performance systems, build features using Python and Django, mentor junior talent, and ensure system reliability through automated testing.

Lead QA activities for an IAM program: design and implement QA methodologies, create and run manual and automated tests, perform code/product reviews, triage defects, validate functionality/performance/security, and support CI/CD, UAT, and release validation across Agile teams.

Design and implement scalable frontend solutions using JavaScript/TypeScript and React. Drive architecture discussions, ship features with minimal guidance, maintain code quality and styling standards, collaborate across agile teams, ensure performance and scalability, and manage end-to-end feature lifecycles in a fast-moving environment.

Join an early engineering hire at a growing SaaS platform for online communities. Scope and deliver new features, write modular TypeScript/React code, enable AI coding agents, monitor production, and troubleshoot issues while influencing product direction and improving platform scalability and developer experience.

Design, develop, and maintain backend services for the Leap quantum-classical hybrid cloud platform. Collaborate with product owners and architects across the SDLC to deliver features, troubleshoot and tune production systems, write clean maintainable code, participate in code reviews and on-call rotation, and mentor junior engineers to improve engineering practices and platform scalability.

Design and own AI-agent-driven test workflows and the automated verification framework. Build test context, select models and tooling, validate AI-generated code and tests, operate test automation across UI/API/mobile/data, ensure security and compliance, mentor teams, and continuously improve agent orchestration and observability.

Lead the development of high-performance software systems, mentor junior engineers, and contribute to technology strategy while ensuring scalable and maintainable solutions.

Develop, test, and improve the OT Security Platform as part of the Microsegmentation Product Team, ensuring high-quality software and architecture.

The Senior Software Engineer will design, build, and maintain CI/CD pipelines, improve automation workflows, and mentor junior engineers in a security-focused development environment.

The role involves designing and optimizing LiveKit's media pipeline, building distributed systems for media ingestion and export, and shaping technical direction across products, ensuring high quality and operational excellence.

Design and maintain backend services for AuthZed Cloud's control plane, focusing on Kubernetes systems and secure authentication. Collaborate with teams for system reliability and incident resolution.

The Software Development Engineer II will develop navigation solutions, balance rapid development with reliability, and optimize performance while promoting operational excellence at Mapbox.

The Senior Backend Engineer will design and build backend systems for a multi-cloud platform, ensuring performance, scalability, and high quality while collaborating with various teams and stakeholders.

You will develop and maintain components of the LLVM based toolchain, collaborating with the community while ensuring platform-specific optimizations and tests.

As a Staff Software Engineer, you'll architect and build foundational platform services, focusing on data infrastructure, healthcare interoperability, and secure APIs while mentoring other engineers.

Design, architect, and deliver scalable full-stack web features; own complex systems end-to-end; mentor engineers; deploy and manage cloud-based, containerized applications; maintain high code quality and excellent user experience while collaborating with product.

The Software Engineer V - Security Engineer will lead security measures, translate compliance requirements into actionable guidance, and proactively secure sensitive data across product teams.

Lead the design and implementation of identity and access management solutions, collaborating in an agile environment and providing technical leadership.

Join the ApartmentIQ team as a Senior Software Engineer to develop and enhance a platform for property management, focusing on user experience and feature deployment.