Top Senior Software Engineer Jobs in Portland, ME

As a Staff Software Engineer, you'll develop and maintain core platform infrastructure, design scalable systems, mentor junior engineers, and ensure reliability of product features.

Design, build, and maintain APIs and systems at Telnyx, debug production issues, improve engineering standards, and collaborate across teams.

Design and implement high-performance, 3GPP-compliant 5G Core control- and user-plane functions on ARM-based embedded Linux. Develop in C/Go/Rust, use DPDK for packet processing, optimize latency/throughput, debug protocol and performance issues, and collaborate cross-functionally to integrate carrier-grade systems.

Design, build, and operate Planet's scalable object and metadata storage platform. Own backend services, Elasticsearch indexing, search, event notification, and disaster recovery. Measure performance, create alerts, be on call, drive system design and architecture, mentor engineers, and contribute to the technical roadmap for highly available, cloud-native data infrastructure.

Lead technical direction and deliver collision-free motion planning for humanoid robots. Design, implement, test, and deploy trajectory optimization, MPC, and sample-based planners; architect modular planning systems integrated with perception, state estimation, and control; develop algorithms robust to uncertainty; and provide cross-team technical leadership and mentorship.

The Staff Software Engineer - Cloud leads the design and implementation of scalable cloud systems and ML pipelines, mentoring a team and collaborating across engineering functions.

The Senior Software Engineer will enhance the Arrive Health Network platform by developing scalable systems, integrating with EHRs, and mentoring team members.

The Senior Software Engineer will work on projects involving cloud infrastructure, fare scanner tools, and contactless payment risk management, while collaborating closely with a small engineering team.

Lead the design and development of full-stack solutions for prescription decision-making, maintain backend systems, mentor engineers, and ensure system scalability.

Design, build, and lead scalable API and platform features. Mentor junior engineers and drive technical initiatives from design to delivery.

The Staff Software Engineer will lead technical initiatives, drive quality code, mentor engineers, and work on scalable systems in a high-impact team environment.

The Staff Engineer will build web APIs and data pipelines for electricity cost modeling, collaborating across teams and ensuring efficient code in the energy analytics domain.

As a Software Engineer, AI/ML GenAI, you will design and implement AI features, manage embeddings, and optimize AI systems for production deployment while collaborating with product and design teams.

Seeking a Senior Elixir Engineer to develop scalable systems and contribute to technical decisions within product groups, focusing on Elixir and cloud technologies.

Own quality engineering for Commerce: run structured manual QA, build E2E automation (storefront, checkout, brand portal), wire tests into CI, define Shopify-specific compatibility playbooks, set quality metrics and gates, participate in planning and spec reviews, and lead the teamto shift coverage left.

Lead frontend development of production web applications using Svelte and other frameworks. Build reusable components, integrate REST/GraphQL APIs, ensure UI/UX quality, accessibility, and performance. Lead a small team, coordinate releases with QA, write tests, follow Git and CI/CD workflows, and collaborate remotely with stakeholders across the US.

As a Staff Software Engineer, you'll design and build backend services, lead system design efforts, mentor engineers, and ensure system quality and reliability.

As a Senior Software Engineer, you will work across the stack to create scalable and reliable systems for tracking freight intelligence, influencing architecture, mentoring, and collaborating with various teams.

The Senior Software Engineer will lead frontend development using React for Afresh's AI grocery platform, mentoring engineers and collaborating across teams to enhance web solutions.

Design, develop, test, and own SDKs and REST APIs for a next-generation analytics platform. Collaborate with Product Management, contribute to DevOps and quality frameworks, perform code reviews, and mentor teammates to deliver performant, well-tested software.

Lead design, implementation, and maintenance of scalable backend systems and services. Improve performance, reliability, and deployments; operate production systems (incident response rotation); conduct code reviews; mentor engineers; collaborate with product, sales, and customers.

The Senior Software Engineer will design, develop, and maintain scalable backend systems, optimize performance, and collaborate with other teams while mentoring junior engineers.

The Senior Software Engineer will develop software for automated mobile application analysis, lead implementation decisions, and mentor junior engineers.

As a Staff Software Engineer at Saris AI, you will lead the design and architecture of core systems, build AI-powered software for financial workflows, and drive engineering excellence while collaborating with product and leadership teams.

The Senior Software Engineer will modernize USPS shipping technology, refactor legacy systems for cloud integration, and develop high-performance services using Go, while collaborating with teams and addressing production challenges.