Backend Developer Jobs in Connecticut, United States

Staff Software Development Engineer responsible for designing, coding, and deploying Java backend services for CVS Retail Pharmacy systems. Leads architecture, collaborates with cross‑functional teams, ensures high performance, and mentors junior engineers.

CVS Health’s API Platform team builds a scalable, TypeScript‑based monorepo that powers hundreds of internal services and customer‑facing APIs. The Staff Engineer leads backend architecture, designs GraphQL APIs, and shapes reliability, observability, and security patterns across gateway integrations.

Senior Backend Engineer at CVS Health builds scalable microservices, APIs, and data pipelines for internal developer platforms using Java/Spring Boot and Python. Works on cloud-native services on AWS/Azure, containerized deployments, CI/CD, event-driven architectures with Kafka, SQS, RabbitMQ.

Gartner IT’s Backend Engineering team builds the core platform for personalized email and notifications delivery, driving digital engagement for clients. The Sr Manager leads a multidisciplinary team, architecting high‑performance, secure, and scalable solutions while leveraging AI/ML to personalize delivery.

Backend Capability team at CVS Health drives the backend platform, API ecosystem, and third‑party integration layer for its SaaS health suite. The role defines API standards, steers a scalable event‑driven microservices architecture, and leads integration strategy with EHR/EMR systems and emerging AI model APIs.

Disney’s Interactive Messaging Platform Team seeks a Software Engineer II – Backend Java to build and maintain high-throughput, real‑time messaging systems powering ESPN’s alerts, push notifications, live activities, and email alerts for millions of users. The role involves designing, developing, testing, and deploying scalable Java solutions on AWS, optimizing performance with NoSQL (MongoDB) and other high‑scale technologies, and collaborating with product and technical leaders to translate bu

Senior Software Engineer – Java Backend at Disney. Join the Interactive Platform Engineering team within Disney Entertainment & ESPN Technology to build and maintain high‑throughput systems for flagship products such as ESPN mobile, web, and Fantasy Football.

ASML Production Engineering team in Wilton, CT builds and maintains lithography systems for semiconductor manufacturing. The System Integration and Test Engineer works hands‑on with opticians and technicians to troubleshoot production interruptions, develop short‑term containment solutions, and document detailed failure reports during night shifts.

Senior engineering leader overseeing a multidisciplinary backend team focused on building and scaling a personalized email and notifications platform, driving performance, security, and AI-driven engagement.

We’re building a world of health around every individual — shaping a more connected, convenient and compassionate health experience. At CVS Health®, you’ll be surrounded by passionate colleagues who care deeply, innovate with purpose, hold ourselves accountable and prioritize safety and quality in everything we do.

Senior Software Engineer focused on backend microservices using Java, Spring Boot, GraphQL, REST, GCP (GKE, Spanner), Kafka, CI/CD with GitHub Actions, Argo CD. Design and develop cloud‑native services, integrate APIs, deploy on GKE, automate pipelines, work with Postgres dialect, ensure scalable, secure environment.

FactSet develops flexible data and software solutions for investment professionals. Seeking a Senior Software Engineer to design and develop high-performance Order Management System features across Java backend and frontend.

Biologics Analytical Development team at AstraZeneca develops robust LC methods to define product quality for therapeutic proteins, enabling confident decisions from early development through commercialization. The Scientist II builds, optimizes, and qualifies UHPLC methods, operates and troubleshoots instrumentation, and collaborates with R&D, Manufacturing, QA and QC to support release, stability, and regulatory submissions.

Commercial Scorecard group leads the design, development, and governance of commercial credit risk models used for portfolio monitoring, regulatory compliance, and capital management. The Senior Manager oversees model lifecycle, directs a team of quantitative analysts, and partners with technology and risk committees to integrate and validate models.

Senior Consultant – IBOR – Investment Software Development – Charles River Development at State Street. Lead CRIMS implementations, define client requirements, configure and tune the application, train users, test workflows, resolve issues pre‑live.

Global Development Lead, Medical Director, Oncology Early Development at Pfizer leads the clinical development strategy for early-stage oncology assets. The role supports clinical trials from first-in-human to proof-of-concept, overseeing protocols, investigator brochures, study reports, statistical plans, and regulatory documents.

Lead clinical study design and execution, accountable for data integrity and quality, prepare protocols, consent, training materials, contribute to development plans, brochures, SAP, regulatory docs, implement data review strategy, analyze trends, serve as technical resource for clinical issues, support publications, abstracts, presentations, sit on project teams for FIH/PoM/ESoE/PoC milestones, collaborate with ops, biostat, pharmacology, digital medicine, manage own time for start-up, conduct,

Alexion’s Analytical Development team builds and qualifies bioassays and impurity methods to support biotherapeutic release and regulatory filings. The Development Scientist III designs ELISA, enzymatic, and cell‑based assays, authors SOPs, and leads cross‑functional problem‑solving to meet project milestones.

Analytical Development and Clinical Quality Control (ADQC) at AstraZeneca Alexion drives innovative bioassay and impurity method development to support rare disease therapeutics. The Development Scientist III leads qualification of bioassays, process‑derived impurity methods, authors SOPs and regulatory sections, and drives cross‑functional problem solving.

Lead early clinical development strategy for cardiometabolic diseases, design and execute Phase 1/2 studies, manage regulatory submissions, and collaborate across cross‑functional teams to deliver high‑quality data and insights.