Top Software Engineer Jobs in Hartford, CT

Design, build, and operate backend systems for a mortgage lending platform. Own backend responsibilities from design through production, focusing on scalability, performance, reliability, and multi-service architectures while collaborating with product and full-stack engineers.

Join an early-stage platform team to scale and mature a mortgage origination platform. Work across the stack to improve distributed systems, performance, observability, and infrastructure tooling, and help define engineering standards and frameworks for growth.

Build and maintain full-stack features on a product-oriented team, owning product areas end-to-end. Ship customer-facing functionality, design and optimize data models and schemas, work with React state management, relational databases, cloud services, event streaming, caching, and AI tools. Collaborate cross-functionally, take high ownership, and occasionally support mission-critical work outside normal hours.

Build and scale the platform infrastructure to support mortgage origination: design cloud architecture, deploy and operate Kubernetes-based systems, manage databases, implement observability and incident response, and create internal developer tooling to improve reliability and engineering velocity.

Build and scale the frontend for a cloud-based mortgage origination platform. Lead React and TypeScript development, contribute to technical tooling and design system, collaborate with design and engineering to deliver production web applications handling complex data models.

Build and operate Abnormal AI's cell-based cloud infrastructure: bootstrap cells, provision multi-cloud (AWS/Azure) resources, deploy application stacks, automate lifecycle tooling, triage cross-layer incidents, reduce toil via automation, participate in on-call, and collaborate with product and application teams for scalable, secure, cost-efficient deployments.

As a Full-Stack Software Engineer, you'll build user-facing features, optimize GraphQL backend, and develop scalable systems, contributing significantly to the company's growth.

Build and maintain the core backend product: design and implement features, take ownership of end-to-end outcomes, iterate and fix bugs without a QA team, collaborate with product on scoping, and contribute to company culture and hiring.

As a Software Engineer, you'll design and develop microservices using a cloud-native tech stack, with a focus on financial services and secure systems.

Build and maintain API-to-API and EHR integrations (FHIR/HL7), collaborate with Product and Customer Success, develop integrations in Rhapsody, provide documentation and on-call support, and improve integration architecture and processes.

Design, build, test, and document core networking software features across client and backend services. Improve efficiency, scalability, and stability of networking systems, own running services (observability, incident response, support escalations), and bring a security-first mindset to design and implementation.

Design, develop, test, and maintain .NET applications and RESTful APIs. Collaborate in Agile teams using GitHub/Git and Visual Studio. Ensure quality through testing, debugging, documentation, and observability. Troubleshoot and enhance existing software, mentor teammates, and promote security, reliability, scalability, and compliance.

Design, build, and maintain backend systems and versioned APIs for payments; collaborate with product, design, and infra; deliver features, tests, deployments, and long-term roadmaps while upholding high engineering standards.

Senior Backend Software Engineer responsible for extending APIs and backend systems, working with product and design, interfacing with PostgreSQL, improving testing, and addressing architecture, security, anti-fraud, performance, scalability, personalization, and payments. Mentor peers, participate in on-call rotation, coordinate across teams, and use LLMs where appropriate to improve product and development workflows.

Design, extend, and maintain backend APIs and systems for a fashion marketplace. Work with product and design to build features, optimize performance, security, anti-fraud, payments, and scalability, mentor engineers, improve testing, operate PostgreSQL, participate in on-call, and leverage LLMs where appropriate.

Design, develop, and maintain software applications: implement features, fix bugs, participate in code reviews and Agile ceremonies, troubleshoot issues, support QA efforts, produce documentation, and collaborate across teams while occasionally leading small projects and training peers.

Designs, codes, tests, and documents .NET applications; follows SDLC and Agile/Scrum practices; supports Tier 3 incidents; works on system integration and CI/CD (Jenkins, GitHub); collaborates with product owners and vendors; participates in production releases and mentors junior developers.

Build, operate, and scale tier-0 backend services that ingest and process billions of emails daily. Design and deliver backend features, improve system stability, performance, and scalability, collaborate across R&D, participate in on-call rotations, and drive operational excellence and knowledge sharing.

Seeking a Software Engineer with 3+ years experience in software development, programming (Go, Java, C++, C#), and strong analytical skills.

The Staff Software Engineer will architect and develop high-performance cloud services, resolve infrastructure bottlenecks, ensure engineering best practices, and mentor junior members.

The Senior Software Engineer will drive the retail technology initiatives at Toast, focusing on payment solutions and enhancing customer experiences. Responsibilities include collaborating on high-impact opportunities, technical decision-making, and adapting to customer needs.

Design, develop, test, debug, and maintain software systems end-to-end. Implement cloud-native solutions, APIs, and infrastructure-as-code; troubleshoot incidents and defects, add observability, and follow CI/CD practices. Work independently on scoped and ambiguous problems, provide technical guidance and mentorship, collaborate with product and teams, and deliver reliable, well-tested software.

Build and maintain shared JavaScript libraries and UI components, implement business logic for tooling workflows, review JavaScript/TypeScript code, lead technical initiatives, and apply TDD and agile practices to frontend web tools for the digital supply chain.

Collaborate with a distributed team to develop, maintain, and modernize the Landscape management software for Ubuntu, focusing on quality code and automated testing.

Build and maintain full-stack features for Cengage Learning Platforms using Java/Spring backends and React frontends. Integrate AI/LLM services, design APIs, improve platform architecture, troubleshoot cross-stack issues, write testable code, and collaborate with product, UX, and QA on accessible, high-quality learning experiences.