Top Senior Software Engineer Jobs in Portland, ME

The Staff Software Engineer will lead design and development of cryptocurrency platforms, provide technical mentorship, and drive system reliability, while staying current on blockchain trends.

Design, build, and operate reliable backend systems while mentoring engineers, participating in design discussions, and improving system performance.

The Lead Systems HPC Engineer will optimize GPU clusters' performance, troubleshoot issues, integrate new hardware, and collaborate with teams on system-level software development.

Design and implement embedded firmware and low-level software for server BMCs and GPU/HPC platforms. Enhance OpenBMC, enable real-time telemetry of power/thermal sensors, debug low-level drivers and interfaces, validate hardware-firmware integration, and contribute to long-term firmware architecture for cluster reliability.

As a Senior SDET, you will enhance testing practices, improve CI pipelines, mentor engineers, and ensure platform reliability through comprehensive testing strategies.

As a Senior Software Engineer, you will build and enhance internal systems and tools that enable product engineering, focusing on high-quality software across the core platform, and contribute to intelligent AI-driven product capabilities.

The Senior Fullstack Engineer will build fullstack features for Real User Monitoring, working with backend services, APIs, and frontend visuals. Responsibilities include designing data ingestion systems, optimizing queries, and collaborating with SDK engineers to enhance user experience. Candidates should have strong backend and frontend expertise, particularly in high-volume data systems.

Design and implement a video processing engine, develop a cross-platform rendering engine, integrate systems, and optimize performance while collaborating with other engineers.

Lead architecture and implementation of high-throughput, low-latency AdServer and Exchange services. Design scalable, resilient distributed systems, integrate demand/supply partners, improve RTB/auction capabilities, advance observability and automation (including AI-driven testing/IaC), and mentor engineers to increase platform reliability and revenue growth.

Design, build, and optimize edge data-collection agents for Windows, Linux, and Mac. Collaborate with product, UX, and engineering to deliver backend features, own development lifecycle, create automated tests, support SaaS products, and participate in 24x7 on-call rotations.

Build and maintain large-scale batch and streaming data ingestion and ETL pipelines for global geospatial datasets. Implement, test, monitor, and optimize backend services on AWS; integrate data with APIs; mentor engineers; reduce technical debt; and participate in design, code reviews, and on-call support to ensure data quality and operational excellence.

The Senior Software Platform Engineer will design and maintain cloud-based MLOps pipelines, collaborate with cross-functional teams, and support AI workloads to enhance production capabilities.

The Senior Software Engineer will enhance Attentive's event streaming platform, architect high-throughput systems, improve tools for product teams, and tackle complex distributed challenges. Responsibilities include collaborating on messaging systems and modernizing the architecture.

As a Principal/Staff Software Engineer, you will design, implement, and lead embedded software for Optical DCI transport systems, ensuring performance and reliability.

Build and maintain high-traffic full-stack web experiences using React and Next.js, design and integrate APIs, ensure observability and testing, debug production issues, lead architecture and AI experimentation, and mentor engineers to deliver scalable, reliable booking and purchasing systems.

Engineer end-to-end frontend and backend for an LLM-powered platform serving youth aging out of foster care. Design and optimize RAG systems, prompt engineering, embeddings, and agent interactions. Build accessible, Section 508-compliant interfaces and secure, federally compliant APIs. Ensure retrieval quality, safety, automated testing, CI/CD, and mentor teammates within a cross-functional, remote U.S.-based team.

The Senior Software Engineer will design, build, and maintain backend services and REST APIs while supporting data pipelines and governance practices within the Infrastructure team.

Senior Software Engineer responsible for developing complex features, mentoring junior engineers, collaborating on technical direction, and adhering to best practices in software delivery.

Design, build, and evolve customer-facing backend services and public APIs; own features end-to-end from design through rollout; create technical design documents; ensure services are observable, resilient, and usable across multiple products; collaborate closely with Product and Experience teams to prioritize and ship iterations.

Lead reliability, availability, and resiliency strategies for large-scale systems, drive operational excellence, and provide technical mentorship across engineering teams.

Design and implement integrations for a B2B platform, focusing on ERP systems and API architectures while providing technical leadership.

Build and harden product features and tooling for AWS GovCloud, ensuring security, auditability, and compliance. Implement GovCloud-specific authentication, logging, observability, and developer tooling; analyze and remediate security gaps; mentor engineers; support federal self-hosted customers and on-call escalations.

Design, develop, and maintain Hogan mainframe applications and batch processes. Troubleshoot production issues, tune performance, deploy APIs via zOS Connect, leverage zDIH for data integration, use DevOps pipelines, participate in code reviews, and mentor junior engineers.

The Staff Software Engineer will develop full stack solutions, contribute to architecture, mentor junior developers, and collaborate with teams on software projects.

Owner of full-stack features and platform reliability: build scalable web applications, optimize PostgreSQL performance, maintain asynchronous infrastructure (Celery), migrate frontend to server-side HTMX, ship revenue-driving features, ensure observability and SLO-driven reliability, collaborate cross-functionally, write testable code, and participate in architecture and code reviews.