Core Java Developer Jobs in California, United States

1mo

Save

Mark Applied

Hide

1mo

Senior Engineer, Core Banking

United States

$100k-$120k/yr RemoteFull Time

Nymbus: Cloud-native core banking platform for financial institutions.

Lead engineer with full-stack Java and JS framework experience; AI-assisted development and strong architecture skills.

Java, Spring Boot, Angular/React, REST, Swagger/OpenAPI, Git, GitLab CI, Jenkins, JUnit, Mockito, Redis, Kafka, Grafana, Splunk, AWS, CLI, MCP servers, Claude AI models

Save

Mark Applied

Hide

Senior Software Developer- Lead Developer(Core Banking)

United States

$114k-$191k/yr RemoteFull Time

Ford Motor CompanyNYSE: F: Ford manufactures, sells, and services vehicles and mobility solutions.

8+ YOEBachelor's in CS/SE; 8+ years software engineering; 3+ years as technical lead or senior developer; experience with core banking or financial platforms; Java/J2EE, Spring Boot; cloud native on GCP/AWS; secure systems handling PII.

Java, J2EE, Spring Boot, Spring Security, Spring Data, APIs, Google Cloud Platform, AWS, PostgreSQL, SQL, Encryption, CI/CD

Save

Mark Applied

Hide

Android Systems Engineer - Core Payments

Sunnyvale, California, United States

$140k-$210k/yr OnsiteFull Time

FiservNew York Stock Exchange: FI: Provides financial technology and payment processing services to institutions.

2+ YOE2-5+ years software development; Android devices/platforms; Kotlin/Java/C/C++; Android app development; UI performance; security basics.

Kotlin, Java, C, C++, Git, Gerrit, Android, AOSP, PKI, HSM, Encryption

1mo

Save

Mark Applied

Hide

1mo

Software Engineer III, Core

Sunnyvale, California, United States

$147k-$211k/yr OnsiteFull Time

GoogleNASDAQ: GOOGL: Provides online search, advertising, cloud computing, and consumer electronics.

2+ YOEBachelor's degree or equivalent; 2 years in C++, Java, Python, Kotlin or Go.

C++, Java, Python, Kotlin, Go

2mo

Save

Mark Applied

Hide

2mo

Principal Java Engineer II - Security - Elasticsearch

United States

$200k-$316k/yr RemoteFull Time

ElasticNYSE: ESTC: Provides a platform for enterprise search, observability, and cybersecurity.

Expert Core Java, concurrency; experience building scalable AuthZ systems; distributed systems security; IAM and cloud security; strong technical leadership and mentorship.

Java, OAuth 2.0, SAML, TLS, RBAC, ABAC

1mo

Save

Mark Applied

Hide

1mo

Senior Software Engineer - Supply Core

Aliso Viejo or New York or Seattle

$200k-$250k/yr HybridFull Time

StubHubNYSE: STUB: Online marketplace for buying and selling live event tickets.

5+ YOE5+ years in software development; Java or C#; experience with infrastructure, databases, data processing, distributed systems, security and privacy; end-to-end ownership; mentoring experience.

Java, C#, Databases, Machine Learning, Distributed Systems, Security, Privacy

Save

Mark Applied

Hide

Staff Software Engineer - Core Ingest

United States

$173k-$203k/yr RemoteFull Time

Sumo Logic: Provides a cloud-native SaaS platform for machine data analytics

6+ YOEBS in CS or related; 6-8+ years in distributed systems; Kafka, Java/Scala; multi-threading; microservices; strong communication.

Apache Kafka, Java, Scala, Docker, Kubernetes

Save

Mark Applied

Hide

Lead Software Engineer - Core AI

San Francisco or United States

$200k-$215k/yr RemoteFull Time

Zeta GlobalNYSE: ZETA: Provides an AI-powered marketing platform for enterprise customer engagement.

8+ YOE8+ years engineering experience with proficiency in C#, Java, JavaScript, Go, or Python; experience with generative AI, LLMs, and cloud infrastructure; strong architecture and mentoring.

C#, Java, JavaScript, Go, Python, Generative AI, LLMs, MCP, LangGraph, OpenAI, Bedrock, Cloud infrastructure

2mo

Save

Mark Applied

Hide

2mo

Staff Engineer, AI Core

Palo Alto or Miami or Washington or Durham or Toronto

HybridFull Time

NubankNew York Stock Exchange: NU: Operates a digital financial platform offering banking and credit services.

Experience as a Staff Engineer or Senior Engineer shipping complex, large-scale consumer-facing mobile apps; strong backend and AI/ML data-pipeline experience; leadership and mentorship.

Flutter, AWS, Go, Java, Python, Clojure, Microservices, Event-driven

Save

Mark Applied

Hide

Software Developer, Senior

Monterey, California, United States

$87k-$198k/yr RemoteFull Time

Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients

3+ YOE3+ years in Java development; Core Java/J2EE, Angular or Spring; OpenAPI and API design; Docker/Kubernetes; Agile/Scrum; Secret clearance; Bachelor's degree.

Java, J2EE, Angular, Spring Framework, Docker, Kubernetes, OpenAPI, Web Services, Docker, Jboss, WebLogic, Maven, Ant, MySQL, NoSQL, Oracle, SOAP, REST, DoD policies

3mo

Save

Mark Applied

Hide

3mo

Senior Software Engineer II, Core Infrastructure

Mountain View, California, United States

$140k-$240k/yr OnsiteFull Time

MoveworksNYSE: NOW: AI assistant platform for automating enterprise employee workflows.

7+ YOE7+ years in design, build, ship, and maintain products or platforms; BS/MS in CS; experience with API-based platforms, REST/RPC; microservices in Python/Golang/Java/C++; startup pace; strong communication; eager to learn and iterate

Python, Golang, Java, C++, REST, APIs

2mo

Save

Mark Applied

Hide

2mo

Site Reliability Engineer, Core Streaming (Remote - Canada)

North America

$135k-$185k/yr RemoteFull Time

YelpNYSE: YELP: Online platform for crowdsourced local business reviews.

Design, deploy, and maintain large-scale Kafka streaming infrastructure; improve reliability and automation; participate in on-call rotations.

Kafka, Kafka Client APIs, Apache Flink, Java, Python

2mo

Save

Mark Applied

Hide

2mo

Sr. Software Engineer, Cloud - Core Reliability Services

Sunnyvale or Austin or New York City

$140k-$215k/yr HybridFull Time

CrowdStrikeNASDAQ: CRWD: Provides cloud-native endpoint protection and threat intelligence services.

7+ YOE7+ years backend development; 5+ years microservices; expert in Golang; distributed systems; production-grade code with performance and reliability focus; strong collaboration and leadership.

Golang, Java, Scala, Kotlin, Python, Node.js, Kubernetes, AWS, Cassandra, Kafka, Elasticsearch

1mo

Save

Mark Applied

Hide

1mo

Developer

United States

RemoteFull Time

Sprezzatura Management Consulting: Provides digital modernization and management consulting for federal agencies.

3+ YOEBachelor’s degree in Engineering, Computer Science, or related field; minimum 3 years software development experience; strong Java, Spring Boot, .NET Core, Node.js, and React skills; experience with modern devops and cloud tools.

Java, Spring Boot, DotNet Core, Node.js, React, Kubernetes, Docker, Jenkins, Gitlab CI/CD, Terraform, Oracle, SQL, PostgreSQL, Redis, Okta, Ping Identity, VA IAM, Splunk, Kafka, MuleSoft, IBM MQ

Save

Mark Applied

Hide

Staff Software Engineer - Core Experience

San Francisco or New York

$189k-$315k/yr OnsiteFull Time

Rippling: Unified platform managing workforce HR, IT, and finance operations

8+ YOE8+ years software engineering; backend systems; scalable architecture; ownership; collaboration; backend languages.

Python, Go, Java, SQL, NoSQL

2mo

Save

Mark Applied

Hide

2mo

Software Engineer II, Identity Core

United States

$83k-$221k/yr RemoteFull Time

GitHubNASDAQ: MSFT: Platform for hosting software code and collaborative version control.

2+ YOE2+ years in software engineering; degree in CS/EE or related field; experience with high-traffic apps; Git/GitHub experience.

Git, GitHub, CI/CD, REST, React.js, Ruby, Go, Rails, Java, Python, C, C++, JavaScript

2mo

Save

Mark Applied

Hide

2mo

Software Engineer II, Identity Core

United States

$83k-$221k/yr RemoteFull Time

GitHubNASDAQ: MSFT: AI-powered developer platform for software collaboration and code hosting.

2+ YOE2+ years in software engineering or related technical discipline; multiple degree paths; experience building and supporting large-scale apps; familiarity with AI workflows and Git/GitHub.

C, C++, C#, Java, JavaScript, Go, Ruby, Rust, Python, React.js, Rails, Git, GitHub, REST, CI/CD

Save

Mark Applied

Hide

Principal Manager- Core Networking

Santa Clara, California, United States

$140k-$275k/yr OnsiteFull Time

Microsoft: Provides software, cloud computing, and hardware technology products.

6+ YOE4+ MgmtBachelor's Degree in Computer Science or related field and 6+ years engineering experience; 4+ years of management preferred; security screening required.

C, C++, C#, Java, JavaScript, Python

Save

Mark Applied

Hide

Staff Engineer, Core Services Platform

San Francisco or Denver

$225k-$278k/yr HybridFull Time

Strava: Fitness tracking and social networking app for athletes.

10+ YOE10+ years backend engineering; tech lead experience; distributed systems design; proficient in Ruby/Scala/Go/Java; AWS; Kafka/Kubernetes; MySQL/Redis/Cassandra.

Ruby, Scala, Go, Java, AWS, Kafka, Kubernetes, MySQL, Redis, Cassandra

1mo

Save

Mark Applied

Hide

1mo

Core Wi-Fi Embedded Software Engineer, Wireless Technologies & Ecosystems

San Diego, California, United States

OnsiteFull Time

AppleNASDAQ: AAPL: Designs and sells consumer electronics, software, and online services.

Proficient in data structures; experience with C/C++, Objective-C, or Java; strong networking knowledge; Bachelor’s in Computer Science; English proficiency.

C/C++, Objective-C, Java, IEEE 802.11/Wi-Fi, GDB, Wireshark, tcpdump, Linux/Unix

1mo

Save

Mark Applied

Hide

1mo

Senior Software Engineer

United States

$130k-$165k/yr RemoteMultiple Commitments Available

HealthEdge: SaaS platform for health insurance administration and care management

7+ YOE7+ years in Java/J2EE development, system integration, enterprise design; proficient in Core Java, XML, Web Services, JMS, SQL; CI/CD, ESB; healthcare domain experience preferred; Agile methods.

Java/J2EE, XML, Web Services, JMS, SQL, Linux, WebLogic, Docker, Kubernetes, Cloud, JUnit, TestNG, Jenkins, Git, Maven, Apache Camel, Spring Integration, OSGi, Karaf

Save

Mark Applied

Hide

Software Developer

San Diego, California, United States

$54-$68/hr OnsiteFull Time

California Coast Credit Union: Provides member-owned banking and diverse financial services to members.

Design, develop, test, and maintain Core Banking System software; collaborate with architecture; provide development and operational support.

Java, C#, UNIX, HTML, JavaScript, SQL, T-SQL, Visual Studio, Git, Azure DevOps, IIS, Python, XML

2mo

Save

Mark Applied

Hide

2mo

Senior Lead AI Engineer (AI Foundations, LLM Core and Agentic AI)

New York or San Francisco or McLean or Cambridge or San Jose

$251k-$286k/yr OnsiteFull Time

Capital OneNYSE: COF: Provides credit cards, auto loans, and retail banking services.

4+ YOEBachelor's or Master's in CS/AI/EE with 4–6+ years in AI/ML; strong Python/Java; cloud experience.

AWS, Huggingface, PyTorch, VectorDBs, Nemo Guardrails, Python, Go, Scala, Java, C++, C#, Golang

3mo

Save

Mark Applied

Hide

3mo

Software Engineer

Ontario, California, United States

$99k-$124k/yr OnsiteFull Time

Origence: Provides lending technology and origination solutions to credit unions.

1+ YOE1+ year software development; .NET/.NET Core, C#, modern web frameworks (Angular/React/Vue) or Java/Spring Boot; SQL/NoSQL; Event-driven/microservices; Azure/AWS; DevOps; TDD.

.NET/.NET Core, C#, Angular, React, Vue, Java, Spring Boot, SQL, NoSQL, Azure, AWS, WCF, Web Services, DevOps, TypeScript, JavaScript, TDD, Unit Testing

3mo

Save

Mark Applied

Hide

3mo

Software Engineer

Ontario, California, United States

$99k-$124k/yr OnsiteFull Time

Origence: Provides financial technology and loan origination software for credit unions.

1+ YOE1+ year software development experience; strong .NET/.NET Core, C#, web frameworks (Angular/TypeScript, React, Vue) or Java; SQL/NoSQL knowledge; event-driven/microservice architecture a plus; DevOps and TDD experience a plus.

.NET, C#, ASP.NET, Angular, React, Vue, Java, Spring boot, SQL, NoSQL, Azure, AWS, DevOps, Unit testing, Integration testing, Event-driven architecture, Microservices

1mo

Save

Mark Applied

Hide

1mo

Sr Software Engineer - High Performance Computing

Irvine or Bellevue

$125k-$229k/yr HybridFull Time

The Trade DeskNASDAQ: TTD: Operates a self-service platform for managing digital advertising campaigns.

6+ YOE6+ years in high-impact software development; distributed systems; .NET Core, C#, Java; Linux, networking; NoSQL; agile practices; degree in CS or related field.

.NET Core, C#, Java, Linux, Networking, Streaming Systems, NoSQL, Distributed Systems

2mo

Save

Mark Applied

Hide

2mo

Customer Issues Developer (US Remote)

United States

RemoteFull Time

Heretto: Enterprise platform for creating and managing structured help documentation.

3+ YOEPassion for bug hunting and customer service; strong problem solving; Java core; cloud and large apps experience.

Java, Spring Boot, JavaScript, TypeScript, React, GWT, Git, Maven, Ansible, PostgreSQL, SQLite, Google Cloud, GKE, Pub/Sub, Cloud Storage, Cloud Functions

1mo

Save

Mark Applied

Hide

1mo

Principal Engineer, Public Cloud / R&D Core

United States

$248k-$310k/yr RemoteFull Time

Cloudera: Provides hybrid data platforms for enterprise analytics and AI.

10+ YOE10+ years distributed systems; strong Java, Kubernetes; Linux, CI/CD; public cloud (AWS, GCP, Azure); architectural leadership; mentoring.

Java, Kubernetes, Docker, Linux, Jenkins, GitHub Actions, Cloud - AWS, Cloud - GCP, Cloud - Azure, Hadoop

2mo

Save

Mark Applied

Hide

2mo

Software Engineer

San Jose, California, United States

$183k-$261k/yr HybridFull Time

ZoomNASDAQ: ZM: Provides cloud-based video communication and collaboration software platform.

3+ YOEMaster’s degree in Computer Science/Engineering or related field; 3 years of experience in Core Java, Spring Boot, design patterns, microservices, and AWS/NoSQL integration.

Java, Spring Framework, AWS, NoSQL, RESTful APIs, Microservices

1mo

Save

Mark Applied

Hide

1mo

ServiceNow Developer IV

San Diego, California, United States

$95k-$161k/yr OnsiteFull Time

ICW Group: Provides workers' compensation and specialty property and casualty insurance.

3+ YOE3+ years software engineering; .NET/.NET Core; Java; strong C#; SQL/ETL; REST/Web services; Git/Jenkins; AWS data experience preferred.

C#, .NET, .NET Core, Java, Git, Jenkins, SQL Server, SQL, REST, Web Services, Postman, Python, CI/CD, HTML, XML, JSON, APIs, SSIS, AWS

1mo

Save

Mark Applied

Hide

1mo

Le Fant LLC - Full Stack Developer - (BEAGLE)

United States

$60k-$126k/yr RemoteFull Time

Le'fant: Provides management consulting and technology services to federal agencies

7+ YOEUS citizen; 7+ years in software design/development; degree in CS/SE or related; strong stack Java/C#, .NET Core, Spring, Angular/React; remote work possible; travel occasionally.

Java, C#, NET Core, Spring MVC, Spring Boot, Angular, React, PostgreSQL, Hibernate, Entity Framework

Save

Mark Applied

Hide

Site Reliability Engineer, Core Streaming (Remote - United States)

San Francisco, California, United States

$141k-$216k/yr RemoteFull Time

YelpNYSE: YELP: Platform connecting consumers with local businesses via reviews.

Hands-on experience with large-scale Kafka, real-time data streams, Java/Python, and infrastructure automation.

Kafka, Java, Python, Apache Flink, Infrastructure as Code

Save

Mark Applied

Hide

Formal Verification Engineer - CPU Core

Folsom, California, United States

$106k-$200k/yr HybridFull Time

IntelNasdaq: INTC: Designs and manufactures microprocessors and semiconductor components.

1+ YOEBachelor's or Master's in Computer/Electrical Engineering; 1-2+ years in verification; knowledge of computer architecture; hardware modeling languages; assertion writing; programming languages; pre-silicon CPU verification; experience with formal tools.

Verilog, VHDL, SystemVerilog, JasperGold, Questa Formal, VC Formal, C/C++, Python, Perl, Java, Specman E

1mo

Save

Mark Applied

Hide

1mo

Senior Agile Software Developer

United States

RemoteFull Time

Concept Plus: Delivers enterprise IT services for federal government agencies.

8+ YOEUS citizen; NACLC; 8+ years software development; 1+ year Agile; Agile/DevOps; Java (Struts, Tomcat); .NET (IIS, C#/.NET Core, C++, ASP.NET); Oracle 19C+/SQL Server 2019+; Kendo React; Git/TFS/Bitbucket; MVC; OOP; team player; BS in CS/IS or related; AF Logistics experience.

Java, Struts, Tomcat, .NET, IIS, C#, ASP.NET, C++/NET Core, MVC, OOP, Oracle, SQL Server, Kendo, React, Git, TFS, Bitbucket, Jenkins, CI/CD, AF Logistics

Save

Mark Applied

Hide

Guidewire Developer

United States

$90k-$100k/yr RemoteFull Time

CognizantNASDAQ: CTSH: Provides IT consulting and technology services to global enterprises.

4+ YOE4+ years’ Guidewire experience, Core Java, REST API, P&C insurance knowledge; experience with unit tests and integration tasks.

Guidewire, Core Java, REST API, NodeJS, GraphQL, Webservices, JUnit, GUnits

3mo

Save

Mark Applied

Hide

3mo

US E-GPS Consulting Services-Mid Level Software Developer/Engineer-Cyber/CD&R-Core-657682 (PD)

United States

RemoteFull Time

Deloitte: Provides professional audit, consulting, advisory, and tax services.

4+ YOEBachelor's degree; TS/SCI clearance; willingness to travel 5-30%; 4+ years high-performance coding in C/C++ or similar; US work authorization.

C, C++, Java, Rust, Git, Linux

Save

Mark Applied

Hide

Member of Technical Staff 3- Core Data Path

San Jose, California, United States

$128k-$256k/yr HybridFull Time

NutanixNASDAQ: NTNX: Sells cloud software and hyperconverged infrastructure for enterprises.

5+ YOEBS/MS in CS or related field; strong OS and distributed systems knowledge; networks/storage experience; languages: C++, C, Java, Go, Rust, Erlang, Python; tools: GDB, Valgrind, Perf, FIO, Flamegraphs; good communication.

GDB, Valgrind, Perf, FIO, Flamegraphs

1mo

Save

Mark Applied

Hide

1mo

Member of Technical Staff – X Core Product

Palo Alto, California, United States

$180k-$440k/yr OnsiteFull Time

xAI: Develops advanced artificial intelligence systems to understand the universe.

2+ YOEDistributed systems experience; Rust/Go/Python/Java; 2+ years in large-scale consumer apps; strong backend and full-stack with AI integrations.

Rust, Go, Python, Java, Distributed systems, APIs, Databases

Save

Mark Applied

Hide

Staff Software Engineer – Identity Platform (.NET / Distributed Systems) Hybrid (2–3 days onsite)

Santa Clara, California, United States

$275k-$289k/yr HybridFull Time

CyberArk: Securing human and machine identities with privileged access management.

7+ YOE7+ years building large-scale, cloud-based distributed systems; strong .NET/.NET Core, or Java; experience with AWS/GCP, REST, PostgreSQL, Redis; security-focused and mentoring capability.

DotNet, DotNet Core, Java, AWS, GCP, REST, PostgreSQL, Redis, OAuth, OIDC, SAML, Security