Top Software Engineer Jobs in Hartford, CT

The Junior Ubuntu Software Engineer will design, build, and ship software, focusing on quality and resilience, while engaging with the open source community.

We are seeking 2025 and 2026 Graduate Software Engineers to join Canonical's teams focused on open source software. Responsibilities include product roadmapping, coding in various languages, engaging with the community, and ensuring high-quality performance. Candidates should have an exceptional academic track record and experience with Linux.

The role involves building and managing scalable distributed systems for Twilio's email platform, mentoring junior members, and improving system performance and security.

The role involves designing, building, and optimizing a data platform, collaborating with cross-functional teams, and ensuring data quality and security.

As a Fullstack Software Engineer, you'll design, build and own the onboarding experience for Twilio's Stytch identity product, creating secure integration solutions for developers and enhancing customer authentication.

As a Software Engineer, you will develop and maintain Python and C# API services, mentor junior developers, and collaborate in Agile teams to deliver software solutions in healthcare communication.

Design, develop, and maintain Java-based backend services and APIs for KeeperApp. Own backend components, optimize MySQL schemas/queries, ensure performance and reliability, apply secure coding practices, participate in code reviews, and collaborate with product and engineering teams to deliver features iteratively.

Design, build, and maintain scalable React/TypeScript web applications for Keeper's Admin Console. Integrate with backend REST APIs, implement enterprise UI workflows (RBAC, policy config, audit views), ensure secure, well-tested frontend code, participate in architecture and code reviews, troubleshoot performance and usability, and maintain documentation.

Senior Node.js engineer responsible for building and maintaining scalable backend Node/TypeScript microservices, supporting UI work in React/Angular, designing APIs, implementing CI/testing, working with containerization and cloud infrastructure, and advising stakeholders on technical trade-offs and feature engineering.

Build and maintain core financial backend systems (trading, ledger, billing), transaction processing, reconciliation, and portfolio state management. Design and scale real-time and batch data pipelines, architect APIs and backend services, ensure reliability and observability, and contribute to distributed system design (event-driven, microservices, streaming). Partner with ML teams as needed.

Design, implement, and operate low-level components of Azure's distributed storage platform. Contribute to design documents, write production code (C/C++/Java), decompose work, participate as on-call DRI, and improve system reliability, performance, and observability at scale.

Build and maintain high-performance REST APIs and backend services for BloodHound Enterprise. Collaborate with front-end and product teams, implement security best practices, optimize database and I/O performance, participate in code reviews, and troubleshoot performance issues and bugs.

Design and build platforms for new products, develop generative AI features, ensure system reliability, and foster a collaborative culture in a startup environment.

Build and own full-stack features from design through deployment. Collaborate with product and customers, use AI/LLMs and agentic workflows to accelerate development, mentor teammates, participate in on-call rotations, and maintain reliability through testing, monitoring, and incident response.

Develop, test, deploy, and maintain scalable EverHealth features. Collaborate on design, troubleshoot and resolve issues, conduct code reviews, improve automated tests, participate in Agile ceremonies, and build resilient applications using .NET, SPA frameworks, databases, cloud, and CI/CD tooling.

Design, build, test, and maintain React Native features for Hertz consumer mobile apps on iOS and Android. Collaborate with cross-functional teams, integrate APIs and third‑party services, optimize performance, resolve production issues, contribute to CI/CD and testing, and improve mobile UX and accessibility.

Develop and maintain spacecraft flight software across the full lifecycle: requirements, design, implementation, testing, integration with HIL and flight hardware. Build tools and simulations, perform subsystem and platform-level tests, support anomaly resolution, systems modeling, and proposal efforts while collaborating with manufacturing and customers.

Design, build, and maintain customer-facing web applications across the stack with emphasis on TypeScript, React, and Node.js. Translate UI/UX into accessible components, implement and consume REST APIs, write tests, support CI/CD, monitor production, resolve performance and security issues, participate in architecture and code reviews, and use AI-assisted tools to accelerate development while maintaining engineering judgment.

The Full Stack Software Engineer role involves building and maintaining web applications, collaborating on product features, and contributing to the company's engineering culture.

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

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.

As a Fullstack Senior Software Engineer, you'll design and scale systems, lead technical projects, and enhance mental health care access through software at Rula.

The Senior Software Engineer will develop scalable web applications, lead technical projects, design complex systems, and enhance engineering culture through mentoring and collaboration.

As a Senior Software Engineer, you will design best practices for AI Agents, develop standards, collaborate on product opportunities, and stay updated on emerging Agent techniques.

Design, build, and operate backend platform services for ESPNdelivering live sports data. Own features end-to-end, troubleshoot production incidents, collaborate across teams, mentor engineers, and contribute to architecture and technical direction.