Top Senior Software Engineer Jobs in Portland, ME

Design and implement secure, cloud-native APIs and services for Department of Defense healthcare systems. Build and maintain scalable data pipelines, normalize structured and unstructured data, integrate healthcare standards for analytics, collaborate with DevSecOps to deploy in high-compliance cloud environments, and ensure systems meet federal security and privacy requirements.

Senior full-stack Ruby on Rails engineer responsible for backend systems, API design, integrations, data flows, and shipping end-to-end features. Collaborate with product, design, and cross-functional teams, maintain architecture and testing standards, and help evolve clinical and billing infrastructure.

Design, build, and operate highly concurrent, distributed backend services in Go. Drive architecture, performance optimization, reliability, observability, and secure development practices. Partner with frontend, platform, autonomy, and embedded teams to deliver mission-critical systems from edge devices to cloud production.

The Senior Software Engineer will lead technical strategies, build AI-driven software systems, mentor junior engineers, and ensure security best practices.

As a Lead Infrastructure Engineer, you'll enhance database reliability, automate infrastructure, collaborate on initiatives, and participate in on-call duties.

The Manager of Software Engineering will lead the Developer Environments team, enhancing developer productivity through effective environment provisioning and CI/CD workflows while mentoring engineers and implementing system reliability improvements.

The Senior Staff Software Engineer will lead major projects, drive architectural innovation, interface with customers for solutions, and mentor engineers. Experience in software engineering and a strong grasp of AI, cloud scale, and evolving technologies is essential.

Develop and manage high-performance back-end systems, design secure APIs, optimize performance in cloud environments, conduct testing, and manage ML model lifecycles.

Build and maintain eBPF-based network monitoring instrumentation in the Datadog Agent, debug production incidents spanning kernel/eBPF/agent runtime, research and prototype solutions for high-throughput, low-latency network observability, and provide technical input to product and architecture decisions.

The Staff Software Engineer will enhance video capabilities, support live streaming and storage infrastructure, and collaborate on platform development. Responsibilities include coding, mentoring, and ensuring platform reliability for millions of users.

Design, build, and operate scalable, highly concurrent backend services in Go. Architect distributed, fault-tolerant systems, optimize performance and reliability, define APIs and service boundaries, improve observability and operational readiness, and collaborate cross-functionally to support mission-critical autonomous deployments.

Design, build, deploy, and operate a high-concurrency, resilient configuration and publishing platform. Lead cross-team projects, set technical direction, improve engineering productivity, optimize performance, and maintain end-to-end ownership of distributed systems at scale.

Lead design and delivery of backend-focused full-stack features for the Business Platform. Build APIs, data models, and reliable parsers, ensure secure resilient systems, mentor engineers, drive estimates and quality, collaborate with Growth on data-driven features, and integrate AI tooling into development workflows.

Join Archy as a Senior Platform Software Engineer to enhance dental practice management through a scalable SaaS solution, focusing on cloud infrastructure, CI/CD pipelines, and AI integration.

The Senior iOS Engineer will drive key engineering decisions, enhance the iOS app, and engage in product strategy discussions. Responsibilities include shipping production code and maintaining app architecture.

Build and maintain end-to-end web applications powering sales and operations. Design tools for quoting, scheduling, and fulfillment, integrate AI into products, collaborate on UX, ship high-impact features, and contribute to architecture, deployment, and engineering culture.

Lead end-to-end full-stack development across React frontends and compiled backends, influence architecture and data modeling, integrate third-party dealership APIs, use AI-assisted coding tools daily, set engineering standards, ship production features to live dealership users, and mentor junior engineers.

Senior .NET Software Engineer responsible for end-to-end software development using Microsoft technologies. Requires extensive experience in SDLC, design principles, technical documentation, web application development with .NET, Agile/SCRUM, Entity Framework, database design, and version control. Familiarity with project tools JIRA, TEMPO, Bitbucket, and Confluence preferred.

The Senior Software Engineer for the Treasury team will develop backend services for fund management, ensuring system reliability and leading projects in a fast-paced environment.

Modernize a legacy, mission-critical system by implementing backend domain services in TypeScript/Node.js, extracting business rules from legacy Java/PL/SQL, ensuring financial-grade correctness and auditability, delivering full-stack vertical slices (React to AWS CDK), using AI-agent development tools, and maintaining CI/CD with automated testing.

Lead modernization of a legacy Oracle system to PostgreSQL: design migration pipelines, implement automated reconciliation and CDC workflows, interpret PL/SQL business logic, build full-stack features (React UIs, Node APIs), ensure financial-grade data integrity, and vet agent-generated code for federal compliance.

The Staff Software Engineer will design and implement solutions for the Websites product, collaborate across teams, and innovate on a scalable web platform for restaurants.

Senior fullstack engineer to build and scale Brigit's consumer finance platform. Own end-to-end features across frontend (React/React Native/TypeScript) and backend (Java/REST/SQL), optimize database and APIs for high scale, integrate 3rd-party services, implement risk and transaction algorithms, improve CI/CD, testing, monitoring, and internal tooling to support millions of users.

Build and maintain core libraries and developer tooling used across the company. Lead complex projects, design and develop backend APIs and AI-assisted developer features, manage platform components (service templates, LaunchDarkly), troubleshoot production issues, conduct code reviews, influence architecture, and mentor engineers to improve developer productivity.

The Software Engineer will build features across the stack, design AI/LLM-driven workflows, translate requirements, and collaborate closely with the founding team and customers.