Top Senior Software Engineer Jobs in Hartford, CT

Design, develop, and maintain scalable Python applications; collaborate with cross-functional teams to deliver features; ensure performance and quality; identify and fix bugs; maintain code quality and automation; lead and mentor team members using agile practices.

Build and scale backend systems for a high-traffic donor CRM and payments platform. Own performant SQL and realtime querying, optimize payment flows, implement AI agents, and collaborate across product and design to ship resilient, production-grade features at scale.

Lead Platform Engineer to design and evolve Subaru.com using Java, AEM, and AWS. Lead architecture and technical delivery, mentor teams, run design and code reviews, enforce quality, and build scalable web applications and services integrating front-end, mobile, and third-party clients.

Owner of end-to-end full-stack features with primary focus on elite Angular/TypeScript frontends. Build real-time UI components (WebSockets/SSE), enforce feature-domain driven Angular architecture, harden API integrations and auth (JWT/OpenID Connect/OAuth2), optimize performance and i18n, and develop high-concurrency backend microservices (Python/FastAPI/Django). Use autonomous coding agents to accelerate and maintain code quality.

Lead company-wide transformation of test automation and quality engineering: define vision and roadmap, architect scalable testing frameworks across server/web/mobile/desktop, integrate AI/LLM for test generation and flakiness management, establish observability and quality gates, mentor engineers, and partner with leadership to embed quality across the SDLC.

Build and ship production frontend features using modern web technologies (Vue.js/TypeScript). Collaborate with product in a cross-functional squad to iterate UX, deliver secure, stable code, and create reusable, testable components. Operate in an AI-first workflow using agentic tools, participate in Git-based development, and apply basic AWS services to solve business problems.

Design and implement backend APIs and performant database schemas (Postgres/SQL); build scalable, testable C# services; work in Agile cross-functional squads; incorporate AI-assisted development tools; and drive engineering maturity and efficiency.

Lead front-end-focused full‑stack development for a multi‑tenant SaaS online banking platform. Build reusable component libraries, migrate legacy UI, optimize UI performance, troubleshoot across front-end and service layers, participate in on‑call rotations, mentor junior engineers, and ensure API‑first integrations and cloud‑native deployments.

Lead full‑stack development of complex research platforms, set technical direction and architecture, integrate data pipelines and evaluation frameworks, mentor engineers, promote AI-assisted engineering practices (e.g., Claude Code), assist hiring/onboarding, and represent technical work across teams to deliver scalable, secure software for digital safety research.

Design, develop, and maintain scalable SaaS platform features using C#, PostgreSQL, React/TypeScript, and AWS. Lead architectural decisions, ensure code quality through testing and reviews, troubleshoot production issues, mentor engineers, collaborate with cross-functional teams, and participate in on-call incident response to maintain reliability and performance.

As a Staff Data Engineer, you'll architect and build data pipelines, champion small data strategies, mentor teams, and ensure operational excellence in data workflows.

Build polished, maintainable React-based front-end product experiences; evolve front-end architecture and component patterns; translate ambiguous product ideas into executable plans; collaborate with product and design; prioritize UX quality, testing, and pragmatic tradeoffs; mentor and raise team effectiveness at the Staff level.

Develop and maintain embedded firmware and kernel/user-mode device drivers for Ethernet-based networking devices. Design, implement, test, and integrate drivers into a Linux and AUTOSAR communication stack, build SDK components, and create debug/test utilities and automated unit/system tests for safety-critical automotive applications.

Design, build, and support scalable, stable web and mobile digital products. Communicate with stakeholders, estimate scope, lead and mentor engineers, produce extensible technical solutions, and use data-driven iterative development.

Lead platform strategy, architecture, and hands-on development. Design, build, deploy, and operate high-performance, fault-tolerant integrations and platform enhancements. Drive security/compliance, mentor engineers, recruit senior talent, align technology with business goals, and communicate technical vision to stakeholders.

Design, implement, and own complex features and services for a large-scale CPM platform. Lead technical design, build modern UIs, design APIs and JSON/XML contracts, drive performance and reliability improvements, mentor engineers, lead code reviews, contribute to CI/CD and production support, and responsibly employ AI-assisted development tools.

Lead design and implementation of batch and stream loading systems to ingest terabytes daily. Provide technical leadership on the Streamloader team, collaborate with architects, engineers, product, sales, and customers, and develop high-performance distributed software in C++ and/or Java while ensuring system reliability and customer success.

Design, configure, and administer the Splunk observability platform for enterprise-scale log and event ingestion. Optimize pipelines for performance, cost, and retention; integrate Splunk with cloud platforms (AWS, Azure, Kubernetes), CI/CD and deployment tools (Puppet, Ansible), and enterprise systems (ServiceNow, PagerDuty). Implement automation using Python/Bash, manage Splunk apps/roles, and support observability and APM initiatives while collaborating within SAFe using Jira and Confluence.

Lead architecture and evolution of enterprise observability platforms (APM, infrastructure monitoring, session replay, log analytics). Define integration patterns, telemetry standards, and governance. Partner with Engineering, SRE, Product, and Infrastructure to embed observability best practices, evaluate new technologies (OpenTelemetry, distributed tracing, AI-driven observability), drive platform standardization, and manage vendor relationships to improve MTTD/MTTR and system reliability.

Design and build secure, scalable cloud-native, AI-enabled applications and microservices for utilities. Lead architecture, translate requirements, develop APIs and data-driven solutions, mentor engineers, and ensure software quality and delivery.

Build and maintain Mapboxs cloud-native infrastructure and GitOps deployment platforms on AWS. Work with Terraform/Terragrunt and legacy CloudFormation/CDK, migrate services to EKS/ArgoCD, architect centralized GitHub Actions CI, configure observability (Datadog/CloudWatch), provide on-call SRE support, document designs, and lead platform strategy and developer experience improvements.

Design and build Alpaca's low-latency, high-throughput algo trading platform. Implement frontend and backend components, optimize performance, design distributed systems and data models, and develop/order and risk management systems for high availability.

Design, develop, and maintain backend platform services and APIs using Go/JS/Node/GraphQL. Lead architecture, CI/CD, and AWS-based deployments (Lambda, Fargate). Troubleshoot production issues, produce technical designs and estimates, mentor junior engineers, and drive scalable software best practices.

Design, implement, test, and maintain software; author technical designs; write unit and automated tests; participate in code reviews; break down stories and provide estimates; coordinate with Agile teams; own small deliverables and professional development; work with contractors and share best practices.

Lead engineering and develop API-focused full‑stack solutions for brokerage products. Design scalable architectures, build secure cloud-native applications (AWS), drive API strategy, implement CI/CD and DevOps practices, mentor team members, and ensure code quality via TDD/BDD and security/static analysis tools.