Top Senior Software Engineer Jobs in Boston, MA

Own and deliver quarterly engineering goals for Affirm’s ML Feature Platform. Design, develop, and launch scalable backend systems, lead engineers through ambiguous problems, collaborate with product and design stakeholders, improve platform reliability and availability, support on-call operations, establish quality standards, and mentor team members. The role focuses on highly available distributed systems supporting machine learning feature creation, storage, serving, and offline backfilling.

Designs, develops, tests, and maintains high-reliability C++ software for embedded, real-time air-to-air radar systems. Responsibilities include translating requirements into software designs, building test frameworks, supporting DevSecOps practices, conducting peer reviews, documenting interfaces, developing analysis tools, and resolving defects. The role integrates software with larger mission-critical systems and requires expertise in multithreading, memory management, performance optimization, CI/CD, and automated testing.

Design and deliver Android system applications for Toast POS devices, including device policy enforcement, setup, firmware and app updates, background services, and fleet deployment. Lead technical design, cross-functional planning, Android and hardware upgrades, automated testing, production issue investigations, and staged rollouts. Mentor engineers and collaborate with product, hardware, QA, and software teams to build secure, reliable device-management systems.

Designs, develops, tests, deploys, and supports reliable software solutions and significant components from inception through production. Builds APIs and integrations, applies Agile, DevOps, and CI/CD practices, improves automation and observability, performs testing and troubleshooting, and resolves production issues. Collaborates with product, architecture, engineering, and business teams, coordinates upgrades and vendor integrations, manages technical debt, communicates risks and value, and provides guidance to junior engineers.

Build and ship backend features end-to-end using Ruby on Rails and SQL. Lead complex technical projects, solve architecture challenges, establish standards, conduct meaningful code reviews, resolve high-risk bugs, document systems, collaborate across engineering teams, and mentor junior engineers.

Lead architecture and hands-on development of a scalable fraud and payment risk platform. Build backend services, APIs, feature pipelines, configurable rules, experimentation infrastructure, and machine-learning lifecycle tooling. Own reliability, observability, monitoring, performance, and safe production deployments. Collaborate with product, risk policy, data science, and engineering teams while mentoring engineers and driving complex initiatives from design through production.

Build full-stack geospatial applications and platform components for defense and intelligence users. Develop interactive mapping tools with TypeScript, React, Tailwind, Node.js, and PostgreSQL; design reusable map components; ingest, analyze, and visualize high-volume geospatial data; integrate agentic AI analyses; and collaborate with customers, mission owners, designers, and engineers to create intuitive operational workflows.

Senior Software Engineer supporting Air Force electronic systems across the DoD acquisition lifecycle. Responsibilities include software and system design, requirements development and traceability, integration, technical analysis, documentation, milestone reviews, risk mitigation, and sustainment. The role requires Python, Agile SAFe 6.0, engineering tools, AWS familiarity, active Secret clearance, and significant defense-program experience. This is a hybrid position at Hanscom Air Force Base with 20% travel and is contingent upon contract award.

Lead full-stack engineering for Rula’s patient portal, designing scalable, secure, and reliable systems across scheduling, billing, communications, and treatment planning. Own technical direction, architecture, complex initiatives, and long-term improvements while mentoring engineers and collaborating cross-functionally. Build and operate solutions using React, TypeScript, Node.js, microservices or event-based architectures, Kafka, and AWS. Participate in on-call support and troubleshoot production issues.

Lead architecture and development of backend services, APIs, integrations, and internal tools supporting supply planning, inventory, orders, fulfillment, logistics, and membership operations. Set technical direction, deliver complex initiatives, improve system security and resilience, partner cross-functionally, and mentor engineers. The role requires designing scalable distributed systems, integrating enterprise platforms and cloud services, managing data consistency and recovery, and translating ambiguous business needs into reliable technical solutions.

Architects, builds, and operates resilient backend services, cloud infrastructure, automation tools, and self-service interfaces supporting MDR and incident response operations. Partners with security practitioners and engineering teams to translate operational needs into scalable solutions, establish CI/CD and observability practices, improve reliability, and integrate AI-driven workflows. The role also provides technical mentorship, leads architecture and design decisions, and drives complex initiatives through iterative delivery.

Own backend engineering goals for Consumer Engineering, lead delivery of scalable systems, collaborate with product, design, and analytics, improve reliability and code quality, resolve technical and business issues, support on-call operations, and mentor engineers.

Own quarterly engineering goals, lead backend engineers through ambiguous problems, collaborate with product and analytics partners, improve system reliability and availability, monitor operational metrics, establish quality standards, and mentor team members. The role requires designing and launching highly available distributed backend systems at scale using Python or Kotlin, AWS, MySQL, and Kubernetes, while driving technical planning and safe changes across large codebases.

Build and scale MongoDB Atlas Agent Engine, including its developer CLI, SDKs, runtime, memory, retrieval, identity, governance, and distributed systems layers. Design well-tested, reliable, high-performance software; contribute to architecture, code reviews, developer experience, and engineering practices. Collaborate across research, product, design, and engineering teams, own complex projects, mentor engineers, and help evolve the platform for production-scale AI agents.

Develop and enhance globally scalable software using .NET, Azure, React, SQL, and RESTful APIs. Implement internationalization for currencies, numbers, time zones, calendars, pluralization, and RTL layouts. Build automated tests, improve infrastructure reliability, participate in agile ceremonies, lead code reviews, and mentor junior developers.

Lead development of Toast’s consumer-facing web experiences, building scalable guest and restaurant features across the stack. Collaborate with frontend, backend, iOS, and Android engineers using React, TypeScript, Next.js, APIs, and backend services. Own projects from development through launch, monitoring, and analysis while experimenting with users and influencing consumer product strategy.

Lead Agile software teams developing secure full-stack web applications for defense and national security customers. Responsibilities include sprint planning, technical leadership, customer requirements gathering, frontend development with React, backend API development with Python, cloud deployment, containerization with Docker and Kubernetes, and collaboration on scalable, maintainable software systems using DevSecOps practices.

Own complex software systems and critical workflows end-to-end while ensuring reliability, performance, security, and maintainability. Lead architectural decisions, mentor engineers, manage incident response, improve system health, and communicate effectively with technical and non-technical stakeholders. The role requires extensive Ruby on Rails, AWS or equivalent cloud infrastructure, Linux production operations, frontend development, relational databases, testing, CI/CD, and observability experience.

Build and release server-side product features and language-model-powered agents. Define system architecture, data structures, and service interfaces while owning projects from problem definition through production. Partner with founders on product direction, customer requirements, and deployments. The role requires independent judgment, advanced Python expertise, SQL database experience, and practical experience developing language-model or autonomous-agent software.

Build and own end-to-end features for a new consumer marketplace connecting homeowners with vetted contractors. Responsibilities include developing mobile and web experiences, backend services, REST APIs, microservice architectures, geolocation matching, integrations with contractor tools, testing, and rapid product iteration. The role requires independent ownership, collaboration with product and design, and use of AI tools to accelerate development.

Develop and maintain full-stack enterprise applications, APIs, backend services, databases, integrations, and responsive interfaces. Lead Azure hosting, CI/CD pipelines, test automation, monitoring, security, and deployment practices. Integrate ERP, CRM, CPQ, MES, and related systems while automating business processes and improving reliability. Collaborate with analysts and QA to translate requirements into technical solutions, support releases, troubleshoot production issues, and perform root-cause analysis.

Designs, develops, tests, and supports web, mobile, and cloud applications across the full software development lifecycle. Leads moderately complex technical initiatives, develops APIs and integrations, troubleshoots production issues, participates in architecture decisions, and collaborates with Product, QA, DevOps, and business teams. Reviews code, mentors junior developers, supports deployments, and maintains technical documentation. The position is fully remote with up to 10% travel for occasional company gatherings.

Leads the design, development, deployment, and integration of enterprise Salesforce Sales Cloud solutions. Builds Apex, Lightning Web Components, Flows, APIs, and AI-driven capabilities; manages Gearset CI/CD automation; troubleshoots production issues; conducts code reviews; translates business requirements into scalable solutions; and mentors junior developers.

Develop and maintain Java/Spring Boot backend microservices, Angular frontends, secure REST APIs, PostgreSQL databases, and containerized cloud deployments. The role involves updating backend frameworks, optimizing database schemas, managing AWS and Linux infrastructure, and supporting mission-critical government projects. Work is hybrid in Annapolis Junction, Maryland, with up to two telework days weekly. A current Top Secret/SCI clearance with polygraph, U.S. citizenship, bachelor’s degree, and relevant software engineering experience are required.

Develop and maintain full stack payroll applications using React, TypeScript, Java, REST APIs, and SQL/NoSQL databases. Lead architectural design, code reviews, automated testing, deployment, monitoring, and production support. Manage feature delivery, collaborate with product and UX teams, resolve service issues, document solutions, and mentor junior engineers while ensuring scalability, reliability, security, and quality.