Top Software Engineer Jobs in Hartford, CT

Develop secure, scalable full-stack software for satellite ground communications and data transport. Responsibilities include building Python backend services and APIs on AWS, developing TypeScript and Vite front-end applications, designing microservices, managing PostgreSQL databases, implementing authentication and authorization, supporting containerized deployments, resolving production issues, refining requirements, collaborating with MBSE and test teams, and mentoring engineers.

Develop full-stack software for secure, scalable satellite ground communications platforms. Responsibilities include building Python backend services and APIs, designing TypeScript front-end applications, implementing authentication, authorization, microservices, databases, testing, and cloud deployments. The role involves collaborating with MBSE and test teams, translating requirements into technical designs, troubleshooting production issues, supporting integrations, and presenting engineering recommendations. Work requires maintaining secure, reliable systems for U.S. Government missions.

Develop and maintain a Medicare claims processing system in a mainframe environment. Responsibilities include designing, coding, unit testing, debugging, defect resolution, technical documentation, and installing changes in test regions. The role leads complex development components, translates customer requirements into work items, provides estimates and technical guidance, represents the team to clients, and mentors junior developers while supporting Agile/Scrum maintenance and operations.

Develop and maintain Java components for a modernization framework and existing business applications. Support legacy refactoring, API and backend service development, documentation, unit testing, debugging, and application architecture updates. Collaborate with senior developers during design sessions and sprint ceremonies while building expertise in modern development practices, cloud concepts, and application transformation.

Develop and maintain COBOL-based Medicare claims processing software in a legacy mainframe environment. Responsibilities include designing, coding, debugging, unit testing, implementing enhancements, troubleshooting defects, supporting Agile/Scrum delivery, preparing estimates, maintaining documentation, and collaborating with team members, clients, and vendors. The role supports Durable Medical Equipment claims processing and requires adherence to structured development standards.

Develop and maintain COBOL applications supporting Medicare Fee-for-Service claims processing in a legacy mainframe environment. Responsibilities include designing, coding, debugging, unit testing, implementing enhancements, troubleshooting defects, documenting changes, and supporting Agile/Scrum delivery commitments. The role collaborates with technical teams, clients, and vendors while contributing to solutions of moderate complexity and maintaining reliable healthcare system operations.

Develops, tests, documents, enhances, and maintains software applications supporting business requirements. Collaborates with internal teams to define specifications, writes and debugs code, monitors performance, prepares status reports, trains end users, and supports application improvements. The role uses C#, .NET, React, AWS, databases, shell scripting, source control, and development tools. On-call availability and some travel may be required.

Design, implement, test, review, and deploy Scala software features end to end. Contribute to distributed ledger technology and critical financial market infrastructure while maintaining strong code quality, test coverage, and documentation. Collaborate with globally distributed Agile teams, participate in architecture and technical decisions, and communicate effectively across technical and non-technical audiences.

Build and expand fintech and payment systems using Go, microservices, databases, and cloud technologies. Design production APIs and tooling, diagnose customer issues, manage full release lifecycles, document systems, and mentor engineers. Collaborate with product and business teams while guiding AI agents to produce maintainable, observable, testable code that meets engineering standards. Work independently in a high-availability environment and contribute to next-generation financial products.

Provides architectural and technical leadership for institutional exchange systems, including matching engines, order management, market data, risk, and unified trading platforms. Leads ultra-low-latency distributed-system design, cross-team technical alignment, reliability standards, incident response, and multi-quarter initiatives. Maintains hands-on engineering contributions while mentoring senior engineers and developing technical leadership across teams.

Design, implement, and maintain partner integration solutions; translate partner requirements into scalable technical implementations; troubleshoot and automate fixes; collaborate with product and engineering teams to improve tools and ensure successful partner onboarding and launches.

Lead design and delivery of scalable customer-facing features, services, and APIs that process real-time data and AI-powered insights. Build web experiences, contribute to LLM/AI workflows, ensure reliability through observability and rollout practices, and collaborate cross-functionally with Product, Design, ML, and platform teams.

Design and build secure, scalable enterprise clinical workflow systems for Butterfly Cloud. Solve distributed-systems challenges involving elasticity, reliability, performance, and automated validation. Lead system design, own business problems, guide developers through execution, and mentor engineers. The role may span frontend and backend layers and involve cloud architecture, observability, search, real-time applications, GraphQL, containerization, and healthcare data compliance.

Lead technical strategy, build and maintain software systems using AI, mentor early-career engineers, collaborate across disciplines, and protect user privacy and security. The role involves developing scalable systems on AWS and Kubernetes while working with healthcare data and adhering to HIPAA and data-security best practices.

Lead the design, architecture, development, deployment, and optimization of scalable .NET backend systems processing millions of daily healthcare transactions. Mentor developers, guide technical decisions, improve CI/CD pipelines, implement secure APIs, and collaborate with product stakeholders. The role requires expertise in .NET, C#, ASP.NET Core, cloud-native AWS services, Kubernetes, microservices, distributed systems, testing, observability, and secure software development.

Build and scale backend systems for Stytch’s identity platform, including authentication, authorization, and non-human identity APIs. Partner with product and engineering leadership, make architectural decisions, write design documents, review code, and deliver customer-facing features. Improve reliability through observability, incident response, and remediation while collaborating across Twilio and Stytch teams. Mentor engineers and participate in on-call rotations.

Build and optimize the core of a distributed compute engine in Rust for SQL and AI query processing. Responsibilities include designing and delivering engine capabilities, improving query performance, writing maintainable code, and solving complex systems and concurrency problems. The role requires expertise in data structures, algorithms, performance optimization, systems programming, hardware fundamentals, asynchronous programming, atomics, locks, and cache design.

Develop and maintain scalable full-stack web applications using TypeScript, Java, Node.js, HTML, CSS, and MS SQL in a microservice environment. Build AI-powered solutions using LLMs, RAG pipelines, GenAI agents, vector databases, and AI orchestration frameworks. Responsibilities include frontend development, performance optimization, debugging, code reviews, data integrity, and collaboration with AI/ML teams. The role is remote and requires CST availability and high-speed wired internet.

Build and ship production software across the frontend and backend, working closely with founders, customers, and product teams. Develop AI-powered features and systems involving web scraping, unstructured data, PDF parsing, and cloud infrastructure. Translate real-world real estate and financing problems into technical solutions, make high-impact decisions, and own shipped code. The internship may convert to a full-time role.

Design, build, deploy, and maintain resilient, scalable production systems for Toast’s retail customers. The role sets long-term technical architecture and strategy, communicates technical direction, mentors senior engineers, improves engineering productivity, diagnoses performance issues, and drives initiatives amid ambiguity. Engineers collaborate directly with retail customers, visit stores, understand operational workflows, and use AI tools to improve development velocity and quality.

Build and operate high-throughput backend services powering AI agent orchestration, connector integrations, and real-time data pipelines. Design scalable core platform services, collaborate with ML, frontend, and product teams, implement infrastructure-as-code and CI/CD, and mentor junior engineers to deliver reliable, AI-powered features.

As a Software Engineer, you'll design, build, and maintain IAM solutions, ensuring security and reliability while working with cloud computing standards.

Design and build reliable backend services and integrations for Coinbase’s Unified Merge Gate. Lead automated code review, policy evaluation, CI evidence, authorization, merge controls, repository migrations, safe rollouts, observability, and operational ownership. Partner with Security, Compliance, Infrastructure, and engineering teams to improve software review and deployment workflows while measuring merge quality, review volume, time-to-merge, and escaped defects.

Design, scope, and implement scalable backend and platform solutions for a reservations and waitlist product. Improve performance and usability, collaborate with Product and Design, identify high-impact opportunities, and contribute across the stack including APIs and front-end integration.

Leads technical vision and strategy for Affirm’s Marketplace, Search, Ads Platform, and consumer experiences. Designs scalable full-stack platforms, guides architecture and technical excellence, coordinates initiatives across engineering teams, mentors engineers, and drives reliable delivery of customer-focused products across iOS, Android, and Web.