Top Senior Software Engineer Jobs in Hartford, CT

Lead software engineering efforts for the Proton platform, focusing on system design, mentorship, and innovative drug discovery projects. Collaborate with cross-disciplinary teams to enhance engineering processes and standards within a minimalist organizational structure.

Lead design and delivery of customer-facing data product applications, building full-stack experiences (frontend, backend, APIs) using TypeScript, React, Node.js, and Python. Partner with Product and data teams to convert analytics and prototypes into production-grade workflows, establish software engineering best practices, mentor engineers, and prioritize customer value through testing, observability, and operational ownership.

The Senior Software Engineer will develop orchestration and autoscaling for the Lucenia search platform, working with cloud technologies and Kubernetes to manage services and mentor team members.

The Senior Software Engineer will focus on Lucene's distributed indexing and query capabilities, improve code features, and collaborate with a global team.

The Lead Quality Engineer will set quality standards, mentor a QA team, improve testing strategies, and enhance automation in AI-driven workflows.

Design and implement core components of networking systems at Ditto, focusing on transport protocols, performance, and modular architecture.

Lead design and architecture of cloud-first, full-stack enterprise software. Provide technical leadership, mentor engineers, promote automated testing and CI, improve scalability, troubleshoot issues, and deliver complex projects on time.

As a Senior Software Engineer, you will develop product features end-to-end, collaborate with teams, and improve developer productivity.

The Senior Software Engineer will impact the architecture and development of a new platform, building scalable solutions and enhancing technical practices in a collaborative environment.

Design and develop scalable full-stack solutions, collaborate with teams to translate business requirements, and ensure code quality through reviews and testing.

Lead architecture and build platform services for GoDaddy's Internal Developer Platform used by 1,000+ engineers. Design high-scale APIs, infrastructure orchestration, and AI-powered developer tooling. Partner with infrastructure, security, and platform teams. Own production systems (performance, reliability, on-call) and drive technical direction to improve developer productivity across APIs, CLI, and UI.

Optimize Ubuntu integration across latest IoT and server-class hardware, lead customer engagements, and work with open source communities in a remote, collaborative environment.

Design, build, and maintain FeeNavigator features across backend and frontend. Optimize MySQL queries, write unit/integration/end-to-end tests, refactor complex code, document architecture, participate in code reviews, collaborate with Product and SRE, diagnose incidents and performance issues, and contribute to development process improvements.

Lead design and development of highly available payment processing, subscription billing, settlement, refunds, and reporting systems. Integrate with external payment processors and APMs, ensure automated build/test/deploy pipelines, debug production issues, optimize performance, decompose features for incremental releases, conduct design/code reviews, mentor junior engineers, and incorporate regulatory requirements (PCI‑DSS, PSD2/SCA, 3DS2).

The Senior Software Engineer will develop and enhance features for the Keeper Browser Extension, ensuring quality, security, and performance, while collaborating with cross-functional teams and following coding best practices.

Lead frontend architecture and technical direction for shared UI systems and design system. Build, maintain, and document reusable component libraries; collaborate with UX, product, and engineering. Champion accessibility, testing, performance, and design-to-code workflows. Mentor engineers, review contributions, and deliver major UI initiatives end-to-end while balancing technical debt and product needs.

The Staff Software Engineer on the AUE team is responsible for designing and maintaining offensive cybersecurity services, mentoring team members, managing projects, ensuring code quality, and driving technical direction within a collaborative environment.

Design, build, operate, and evolve backend services and runtime infrastructure for cloud orchestration and job execution. Own distributed, asynchronous systems, APIs, workers, persistence, and service-to-service coordination. Improve reliability, observability, testing, and operational tooling; lead cross-team designs and mentor engineers.

Design, build, and evolve scalable backend systems for WWE Champions. Support live-ops, incident management, reliability improvements, and pre/post-release backend support. Collaborate with client (Unity) engineers, drive technical roadmap, mentor cross-functional teams, and optimize performance and content pipelines for live mobile games.

Build full-stack features for AI voice and chat products using TypeScript, Node.js, React, and Python. Integrate ASR/TTS and LLM improvements, optimize production systems for latency and cost, participate in on-call rotations, and collaborate with ML and product teams to scale enterprise AI conversations.

Design and build Azure Kubernetes Service features and AI-native infrastructure, improve service reliability and developer velocity, automate incident prevention/remediation, integrate AI tools, and operate distributed, containerized systems at cloud scale.

Design, develop, and deploy Python- and Java-based scalable REST APIs for a multi-tenant web platform. Collaborate with product, data science, and clinical partners, and ensure software quality, security, and engineering best practices.

Design, build, and maintain scalable web applications, APIs, and backend services across multiple stacks. Make architectural decisions, remediate technical debt, lead client communication and demos, participate in agile teams and code reviews, uphold testing and debugging practices, and contribute to internal best practices and thought leadership.

Senior hands-on engineer owning Prebid/header-bidding wrapper and client-side monetization. Implement and maintain Prebid.js/Server integrations, optimize on-page performance/Core Web Vitals, work with GAM/GPT/IMA, deploy services on GCP, and ensure reliability at scale.

Design, enhance, and maintain backend APIs and integrations for the VA Beneficiary Travel Self-Service System. Implement secure, performant services for automated claim processing, collaborate in two-week agile sprints, support CI/CD and zero-downtime deployments, perform testing, documentation, code reviews, troubleshoot production issues, and ensure compliance with VA standards including security and 508 accessibility.