34 senior backend developer jobs at 20 companies in Danbury, CT
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Senior Backend Software Engineer - Global Commercial Services Technology
Seattle or Phoenix or New York or Washington or Sunrise or Richmond
$123k-$215k/yr HybridFull Time
5+ YOE5+ years backend engineering experience; bachelor’s in CS or related; hands-on Golang, AWS, distributed systems, Kafka, CockroachDB, Camunda/Temporal, Datadog; strong communication and mentoring skills; US work eligibility required.
Golang, AWS, CockroachDB, Camunda, Temporal, Datadog, Kafka, Lambda, ECS, SQS, API Gateway, RDS, S3
2w
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Backend Engineer_AI Gateway
Englewood Cliffs or Plano
$11k/mo OnsiteContract
Deep expertise in async Python and network programming, cloud infrastructure, container orchestration, streaming data, security gateways, IAM/SSO, observability, and CI/CD.
asyncio, aiohttp, anyio, WebSocket, SSE, TLS, HTTP/2, HTTP/3, gRPC, FastAPI, Pydantic, Docker, AKS, EKS, GKE, Istio, Envoy, Redis Streams, RabbitMQ, Kafka, PostgreSQL, PgBouncer, HashiCorp Vault, NGINX, Terraform, GitHub Actions, GitLab CI, CASB, DLP, WSS, Azure AD, Entra ID, Okta, SAML 2.0, OIDC, SCIM, Azure OpenAI, Datadog, Prometheus, Grafana, Azure Monitor
2w
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Backend Software Engineer - Assistant Vice President
Greenwich or New York City
$130k-$170k/yr HybridFull Time
6+ YOEDegree in software engineering,6+ years web application development,experience with Python/Scala/Node.js,knowledge of relational/NoSQL modeling,testing and SSO familiarity.
Scala, Ruby, Node.js, Python, FastAPI, ZIO, Scala Test, ZIO Test, PyTest
1w
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Knowledge Engineer Manager - Back-end Engineer
Seattle or Milwaukee or Dallas or Columbus or Kirkland or Cincinnati or New York City or Cleveland or Oklahoma City or Austin or Albany or Chicago or St. Petersburg or Hartford or Pittsburgh or St. Louis or Miami or Sacramento or Raleigh or Minneapolis or Mountain View or Scottsdale or San Francisco or Morristown or Denver or Boston or Philadelphia or Des Moines or Overland Park or Los Angeles or Charlotte or Walnut Creek or Carmel or Houston or Arlington or Atlanta or Redmond or Bentonville or Beaverton or Nashville or Detroit or San Diego
$80k-$294k/yr HybridFull Time
5+ YOEMinimum 5 years in knowledge graph hydration, ontology mapping, graph and relational databases, vector databases, Python or Java, and REST API development; bachelor's degree or equivalent experience required.
RDF, OWL, SKOS, RDFS, SPARQL, R2RML, CSVW, SHACL, GraphDB, Stardog, Neo4j, Amazon Neptune, PostgreSQL, MySQL, SQL Server, Pinecone, Weaviate, Milvus, Qdrant, Elasticsearch, OpenSearch, Python, Java, SQL, JSON, XML, CSV, REST APIs, Apache NiFi, Airflow, Docker, Kubernetes, Helm, AWS Neptune, Azure Cosmos DB, GCP, Kafka, RabbitMQ, Git, GraphQL APIs, D3.js, Cytoscape.js, Terraform
2mo
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Sr Manager, Backend Engineering
Stamford or Irving
$116k-$170k/yr HybridFull Time
8+ YOE2+ Mgmt8+ years web application development; Java EE/Spring; cloud platforms (AWS preferred; Azure valued); leadership; scalable backend design.
Java EE, Spring, HTML, XML, JSON, PL/SQL, AWS, Azure
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Sr Manager, Backend Engineering
Irving or Stamford
$116k-$170k/yr HybridFull Time
8+ YOEBachelor’s degree in computer science or related field, 8+ years of web application development, Java EE/Spring, HTML, XML, JSON, PL/SQL, cloud platforms, data pipelines, and people leadership experience.
Java EE, Spring, HTML, XML, JSON, PL/SQL, AWS, Azure, HubSpot, Marketo, Eloqua, Agile, Scrum
1mo
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Senior Software Engineer
United States or White Plains
$170k-$200k/yr OnsiteFull Time
5+ YOE5+ years engineering experience, strong backend ownership, product judgment, experience with Python, PostgreSQL, AWS, CI/CD, and building reliable scalable systems.
Python, PostgreSQL, AWS
1w
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Senior Software Development Engineer (Java, Nest, React)
Texas or North Carolina or Scottsdale or Florida or Illinois or Hartford
$83k-$204k/yr RemoteFull Time
5+ YOE5+ years software development experience; strong backend and API development using Java Spring Boot, Node.js, GraphQL; Kubernetes, observability, API design, and cloud-native experience; GCP preferred; bachelor's degree preferred.
Java Spring Boot, Node.js, GraphQL, Kubernetes, Gradle, NestJS, GitHub Actions, Google Cloud Platform (GCP), GitHub Copilot, Claude Code, Cursor, Model Context Protocol (MCP), React, GitHub
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Senior AI Engineer
United States or New York City or Palm Beach or Los Angeles or Miami or Greenwich or Westchester County or The Hamptons or San Francisco or Manhattan
$190k-$250k/yr RemoteFull Time
4+ YOE4+ years building and operating LLM-powered production ML systems, strong Python, backend framework experience (FastAPI/Flask), LLM orchestration and retrieval design, Snowflake/dbt/Dagster/Airflow familiarity, evaluation systems, HIPAA/PHI knowledge, and strong written communication.
Python, FastAPI, Flask, Snowflake, dbt, Dagster, Airflow, vLLM, Triton, TGI, SGLang, LOINC, SNOMED CT, ICD-10, RxNorm, FHIR, HL7
1w
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Lead Developer
Teaneck, New Jersey, United States
HybridFull Time
10+ YOE10+ years professional software development experience with extensive focus on Python3 for backend/service applications; experience designing scalable architectures, testing, performance tuning, hybrid teams, and mentoring developers.
Python3
1d
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Senior AI Engineer – AI Platform
Englewood Cliffs, New Jersey, United States
$140k-$175k/yr HybridFull Time
5+ YOEBachelor's degree in Computer Science or equivalent experience; 5+ years building production software systems; strong Python and backend expertise; experience with AWS, distributed systems, LLM/GenAI, agentic workflows, RAG, evaluation, and operations.
TypeScript, AWS, LangChain, Mastra, LangGraph, Python, RAG
4w
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Python AWS Developer
Hartford or Lafayette
$81k-$172k/yr HybridFull Time
6+ YOE6+ years Python backend development, REST API (FastAPI/Flask), strong SQL, hands-on AWS (Lambda,S3,SQS,DynamoDB,EC2,EKS), CI/CD and production support experience.
Python, FastAPI, Flask, AWS Lambda, Amazon S3, Amazon SQS, DynamoDB, Amazon EC2, Amazon EKS, Boto3, CloudWatch, Jenkins, GitHub Actions, Terraform, CloudFormation, OpenShift, Kubernetes, PostgreSQL, Aurora, Java, ReactJS, Spring Boot, SQL
1mo
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Senior Specialist - Software Engineering
Stamford, Connecticut, United States
$110k-$135k/yr OnsiteFull Time
6+ YOEBachelor's degree in Computer Science or equivalent experience; 6–8 years of full-stack/backend development with Node.js, React.js, REST APIs, databases, CI/CD, containers, and cloud platforms.
Node.js, React, Express.js, REST, SQL, Docker, Kubernetes, Azure, Google Cloud, Microsoft Azure DevOps, GitHub Actions, Python, FastAPI
3mo
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Principal Engineer Software - Storage (Chronosphere)
Burbank or Denver or Chicago or Austin or Jacksonville or Hartford or Bridgeport or Seattle or Boston or New York City
$147k-$238k/yr RemoteAll Commitments Available
Design and build scalable backend services for high-volume telemetry data; strong backend skills; cloud infra experience; API design; mentorship.
Go, Java, Python, Rust, AWS, GCP, Azure, REST, gRPC, GraphQL
1mo
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Sr. SAP Commerce Platform Engineer
West Hartford or United States
RemoteFull Time
6+ YOE6+ years SAP Commerce Cloud backend experience, extension development (type system, persistence, Spring, ImpEx, FlexibleSearch), integrations with ERP/PIM/CRM, Dynatrace troubleshooting; SQL and Solr, headless architecture experience preferred.
SAP Commerce Cloud, Hybris, Spring, ImpEx, FlexibleSearch, Dynatrace, SQL, Solr, Spartacus, React, Contentful, Algolia, Cloudinary, OCC, Kanban
1mo
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Full Stack Staff Software Engineer — AI-Augmented Development
Charlotte or Hartford or Columbus or Chicago
$116k-$174k/yr HybridFull Time
10+ YOE10+ years software engineering experience, 5+ years tech lead experience; Bachelor’s in CS or related (or equiv. experience); expertise in frontend and backend stacks, cloud (AWS/GCP), CI/CD, databases, APIs, and AI-augmented development tools.
React, Angular, Vue.js, TypeScript, HTML5, CSS3, Java, Spring Boot, Node.js, Express, Python, FastAPI, Django, .NET, RESTful APIs, GraphQL, gRPC, AWS, GCP, AWS Bedrock, GCP Vertex, Vertex Studio, Docker, Kubernetes, Jenkins, GitHub Actions, GitLab CI, SQL, NoSQL, PostgreSQL, MongoDB, DynamoDB, Redis, Kafka, RabbitMQ, GitHub Copilot, Cursor, Claude Opus, OpenAI, Anthropic, LangChain, Semantic Kernel, AutoGen, CrewAI
1mo
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Full Stack Staff Software Engineer — AI-Augmented Development
Charlotte or Hartford or Columbus or Chicago
$116k-$174k/yr HybridFull Time
10+ YOE10+ years software engineering and 5+ years full-stack tech lead experience; bachelor's or equivalent; expertise across modern frontend, backend, cloud, DevOps, data, APIs, AI tools, testing, and architecture.
React, Angular, Vue.js, TypeScript, HTML5, CSS3, Java, Spring Boot, Node.js, Express, Python, FastAPI, Django, .NET, RESTful APIs, GraphQL, gRPC, AWS, GCP, Docker, Kubernetes, Jenkins, GitHub Actions, GitLab CI, PostgreSQL, MongoDB, DynamoDB, Redis, Kafka, RabbitMQ, GitHub Copilot, Cursor, Claude Opus, OpenAI, Anthropic, GCP Vertex Service, AWS Bedrock, Vertex Studio, Semantic Kernel, CrewAI, LangChain, AutoGen, SQL, NoSQL, RAG, LLM, CI/CD, Microsoft?
1w
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Staff Software Engineer - Confluent Kafka Storage
Poughkeepsie or Lowell or Rochester or Tucson or Research Triangle Park or Armonk or Boston or Bellevue or Atlanta or San Jose or Dallas or Austin or San Francisco or Seattle or New York City
$161k-$299k/yr HybridFull Time
10+ YOE10+ years backend/infrastructure experience; BS in CS or equivalent; expertise in Java/Scala/C/C++/Go; deep knowledge of distributed storage systems, systems-level concepts, and leadership/mentoring skills.
Java, Scala, C/C++, Go, Apache Kafka, Apache Iceberg, Apache Flink, AWS, Azure, GCP, Kora
1mo
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Sr Product Software Engineer
Bristol, Connecticut, United States
$139k-$186k/yr HybridFull Time
5+ YOE5+ years backend platform experience; strong Java/JVM proficiency; experience with microservices, Spring Boot, event-driven systems, Apache Kafka, MongoDB, CI/CD (GitLab Pipelines/GitHub Actions/TeamCity), cloud deployments, and relational/NoSQL databases.
Spring Boot, MongoDB, Apache Kafka, Java, Go, Rust, GitLab Pipelines, GitHub Actions, TeamCity, MySQL, PostgreSQL, Cassandra, CloudWatch, ECS/Fargate, EC2, S3, Lambda, RDS, Datadog, Grafana, Splunk, GraphQL, Terraform, CloudFormation
1d
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Principal Software Engineer
Bronx, New York, United States
$200k-$220k/yr HybridFull Time
7+ YOERequires 7+ years of software engineering experience, principal-level impact, large-scale distributed systems experience, strong backend skills, architectural judgment, and end-to-end production ownership.
Python, FastAPI, React, TypeScript, MSSQL, Redis, Microsoft Azure, Azure Container Apps, Azure Static Web Apps, Azure DevOps Pipelines, Terraform, eClinicalWorks, Ellkay, Redox, FHIR
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