36 backend developer jobs at 30 companies in Elsmere, DE
Sr. Backend Engineer - Xumo
Irvine or Philadelphia
$142k-$189k/yr HybridFull Time
5+ YOE5+ years Java backend development, REST/SOAP APIs, HTTP/SSL, MySQL/PostgreSQL/Oracle/MongoDB, Linux (CentOS), Docker/Kubernetes, cloud (Google Cloud/AWS/Azure); Bachelor's degree preferred; 7-10 years experience.
Java, MySQL, PostgreSQL, Oracle, MongoDB, CentOS, Docker, Kubernetes, Google Cloud, AWS, Azure, REST, SOAP, HTTP, SSL, JSON, RSS, HLS, MP4, Mpeg-Dash, RabbitMQ, Kafka
Senior Backend Engineer, Experimentation
United States or Oakland or San Francisco or New York City or Boston or Seattle or Irvine or Los Angeles or Monterey or Santa Barbara or Santa Rosa or Austin or Portland or Philadelphia or Chicago
$163k-$264k/yr RemoteFull Time
6+ YOERequires 6+ years of software engineering experience, backend production systems expertise, Go or comparable language skills, distributed systems and data-intensive product experience, cloud operations, and observability practices.
Go, Python, Rust, C++, ClickHouse, Postgres, Snowflake, Redshift, BigQuery, Databricks
Backend Software Engineer
Philadelphia, Pennsylvania, United States
HybridFull Time
Proficiency in Go, Python, Bash, and SQL; Linux and GCP experience; CI/CD and build tooling familiarity; experience in healthcare/regulated environments and building web services with OpenAPI.
Go, Python, Bash, SQL, JavaScript, Linux, GCP, Kubernetes, GKE, Cloud Firestore, Cloud Storage, BigQuery, GitHub Actions, Please, Bazel, Buck, Pants, OpenAPI, Windows, RDBMS
Knowledge Engineer Manager - Back-end Engineer
United States or Albany or Arlington or Atlanta or Austin or Beaverton or Bentonville or Boston or Carmel or Charlotte or Chicago or Cincinnati or Cleveland or Columbus or Culver City or Denver or Des Moines or Detroit or Hartford or Houston or Irving or Kirkland or Miami or Milwaukee or Minneapolis or Morristown or Mountain View or Nashville or New York City or Oklahoma City or Overland Park or Philadelphia or Pittsburgh or Raleigh or Redmond or Sacramento or San Diego or San Francisco or Scottsdale or Seattle or St. Louis or St. Petersburg or Walnut Creek +1 more
$80k-$294k/yr HybridFull Time
5+ YOERequires 5+ years in knowledge graphs, ontology mapping, R2RML, graph and relational databases, vector databases, Python or Java, REST APIs, and a bachelor's degree or equivalent.
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, D3.js, Cytoscape.js, Terraform
Senior Backend DevOps Engineer (Remote Opportunity)
Philadelphia or United States
RemoteFull Time
Experience with AWS ECS, containerized microservices, CI/CD, Infrastructure as Code, AWS networking and IAM, observability, SRE, incident response, and government cloud compliance frameworks.
Amazon ECS, AWS GovCloud, AWS CLI, Infrastructure as Code, FedRAMP High, NIST 800-53, FISMA, IAM, VA Enterprise Cloud
Lead Software Engineer - Backend Java, AWS
Wilmington, Delaware, United States
OnsiteFull Time
5+ YOE5+ years applied experience in software engineering; advanced Java, Spring Boot, and AWS; experience with AI-assisted development tools; agile methodologies; cloud-native experience; financial services industry knowledge.
Java, Spring Boot, AWS, CI/CD
Principal Software Engineer – Backend, Java/Python | Oracle Health
United States or Texas or Nashville or Scottsdale or Portland or Phoenix or Las Vegas or Philadelphia or Florida or Atlanta or Colorado Springs or Denver
$115k-$235k/yr OnsiteFull Time
7+ YOEBachelor's degree in Computer Science or related field; 7-9+ years software engineering; backend systems with Java/Python; distributed systems, microservices, cloud-native; technical lead experience; US citizenship or permanent residency; no sponsorship.
Java, Python, GitHub Copilot, Codex
Senior Python Engineer, Integration
Limassol or Philadelphia or New York City or Austin or Sofia
RemoteContract
5+ YOE5+ years Python development with API and system integrations experience; strong understanding of webhooks, idempotency, observability, and scalable backend architecture.
Python, Django, Datadog, CloudWatch, Grafana
Android Engineer
Philadelphia or Austin
OnsiteFull Time
4+ YOERequires 4+ years of Android development, strong Kotlin proficiency, SDD or backend-driven UI framework experience, RESTful API integration, and client-side state management. Bachelor's degree preferred.
Kotlin, Spec-Driven Development (SDD), RESTful APIs, MVVM, Clean Architecture, Flutter, Dart, Jetpack Compose, MQTT (Message Queuing Telemetry Transport), System Development Life Cycle (SDLC)
Data Software Engineer
Philadelphia, Pennsylvania, United States
HybridFull Time
2+ YOEBachelor's degree or equivalent experience; 2+ years of software development with Scala or Java; backend, ETL, SQL, Linux/Unix, and data-processing experience required.
Java, Scala, SQL, Linux, Unix, Amazon Web Services (AWS), Apache Spark, Amazon EMR, Hadoop
Software Engineer, Connected Fleet & Operations
Fort Collins or New York or Framingham or United States or Ewing Township or Canada or Montreal or Boston or Denver or Philadelphia
$100k-$120k/yr RemoteFull Time
Production Android experience with Kotlin, offline-first design, device and IoT integration, camera, barcode/NFC scanning, GPS, backend or web development, and secure-by-design practices.
Android, Kotlin, Jetpack Compose, Samsara, Next.js, Vercel, LLM, NFC, GPS, BLE
Software Engineer Sr - E3
King of Prussia or Herndon +1 more
$110k-$205k/yr OnsiteFull Time
3+ YOERequires 3+ years developing backend software on Linux with C/C++ or Java, Agile experience, complex application testing and debugging, a BS degree, and active TS/SCI clearance with willingness to obtain a polygraph.
Linux, C, C++, Java, SAFe, Kanban, Scrum, Ant, Git, Maven, Gradle, Jenkins, Jira, Confluence, Collaborator, Docker, Kubernetes, Matlab, STK, AWS
Senior Software Engineer – Splunk Platform Authorization
Boulder or Birmingham or Juneau or Phoenix or Denver or Hartford or Dover or Miami or Atlanta or Honolulu or Boise or Chicago or Indianapolis or West Des Moines or Topeka or Frankfort or Baton Rouge or Augusta or Annapolis Junction or Ann Arbor or Minneapolis or Jackson or Clayton or Helena or Lincoln or Reno or Concord or Santa Fe or Research Triangle Park or Bismarck or Richfield or Oklahoma City or Portland or Philadelphia or Providence or Columbia or Pierre or Nashville or Austin or Montpelier or Charleston or Appleton or Cheyenne or United States +1 more
$139k-$204k/yr RemoteFull Time
7+ YOEBachelor's in CS/Engineering with 7+ years, Master's with 4+, or PhD with 1+; C++ backend development; distributed systems experience; technical leadership; U.S. work authorization required.
C++, Go, Kubernetes
URBN Senior Software Engineer
Philadelphia, Pennsylvania, United States
OnsiteFull Time
7+ YOE7+ years software engineering, 3+ years leading project delivery; expert backend engineering, data stores, messaging systems, containerized workloads; testing discipline; AI-assisted development tools; Python preferred.
Python, RESTful APIs
Software Engineer| Tactical Python Developer | Experienced Hire
Bala Cynwyd or Philadelphia +1 more
OnsiteFull Time
3+ YOERequires 3+ years building Python applications or data systems, strong Python skills, experience with data pipelines, APIs, real-time feeds, SQL, databases, and backend frameworks.
Python, Pandas, NumPy, Flask, FastAPI, SQL
Senior Software Engineer, .Net
Philadelphia, Pennsylvania, United States +1 more
HybridFull Time
5+ YOE5+ years full-stack development; strong C#, TypeScript, .NET Framework or .NET 5+; modern front-end framework; backend APIs; ORMs and relational databases; unit/integration/UI tests; CI/CD; Docker/Kubernetes; U.S. citizenship and ability to obtain Public Trust clearance.
C#, TypeScript, .NET Framework, .NET 5+, Angular, React, Vue, nHibernate, Entity Framework, SQL Server, GitHub Actions, Azure DevOps, Docker, Kubernetes, AWS, Azure, HL7, FHIR, EHR
Senior Software Development Engineer
Berwyn, Pennsylvania, United States
HybridFull Time
7+ YOE7+ years backend engineering with Java/Python, 2+ years hands-on AI/ML, experience designing distributed transactional systems in regulated fintech, security/observability knowledge, and production incident handling.
Java, Python, Spring Boot, SQL, Kafka, Kubernetes, Docker, LangGraph, RAG, Vector Stores
Full Stack Engineer II
Conshohocken or North Carolina or Wilmington or Annapolis or Trenton
$62k-$98k/yr HybridFull Time
2+ YOEBachelor's degree in computer science or related field or equivalent experience; 2+ years full stack development; Databricks, Azure DevOps, Azure cloud services, SQL, frontend (React/Angular/Vue) and backend (Node.js/Python/Java/.NET) experience; Git and Agile.
Databricks, Azure DevOps, Azure Data Factory, Azure Synapse, Azure Functions, Azure App Services, SQL, React, Angular, Vue, Node.js, Python, Java, .NET, Git, PySpark, pandas, Power BI
Full Stack Software Engineer II - Web Portal
Camden, New Jersey, United States
$100k-$120k/yr OnsiteFull Time
3+ YOEBachelor's degree in computer science, IT, software engineering or related field, or equivalent experience; 3+ years professional software development; experience with React, backend services, REST APIs, JavaScript, TypeScript, SQL, Git, and AI development tools.
React, Next.js, Node.js, Express, Java, Spring Boot, PostgreSQL, Snowflake, NextAuth.js, JWT, Microsoft Entra ID, GitHub Copilot, Claude Code, Cursor, Git, SQL
Full Stack AI Software Engineer
United States or Marlton +1 more
RemoteFull Time
5+ YOE5+ years software engineering experience, 2-3 years AI-assisted development, proficiency in backend and frontend languages, cloud platforms, and AI tools; bachelor's or master's degree in relevant field or equivalent experience.
Python, Java, C#, Go, TypeScript, JavaScript, React, Angular, Vue, SQL, Node.js, Git, AWS, Microsoft Azure, Google Cloud Platform, Kubernetes, Cursor, Claude Code, GitHub Copilot, OpenAI Codex, LangGraph, Semantic Kernel, OpenAI Agents SDK
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