19 junior java developer jobs at 13 companies in Ephrata, PA

PromotedHiringCafe
Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
3mo
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Junior Computer Scientist/Engineer
Aberdeen, Maryland, United States
$75k-$131k/yr OnsiteFull Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
2+ YOEBachelor's in engineering or related field with 2 years software development experience; programming in Python/C++/Java; SECRET clearance required.
Python, C++, Java, Cloud platforms
2w
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Cloud Engineer, Specialist
Malvern or Charlotte
HybridFull Time
Vanguard
Vanguard: Provides mutual funds, ETFs, and investment management services.
Experience with AWS Lambda and serverless development, software development using Python (Node/Java nice), familiarity with CloudFormation, CI/CD, monitoring, and production support; strong collaboration and communication skills.
AWS Lambda, Python, Node, Java, CloudFormation, CI/CD
1mo
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API Developer/Programmer
Aberdeen Proving Ground, Maryland, United States
$90k-$150k/yr OnsiteFull Time
SURVICE Engineering
SURVICE Engineering: Engineering services and survivability analysis for defense systems.
2+ YOEBachelor's degree in a technical field and 2+ years experience. Experience with web/API development, MongoDB, PostgreSQL, Microsoft Azure, Keycloak, Java, cloud/containerization, information systems security, and Agile.
MongoDB, PostgreSQL, Microsoft Azure, Keycloak, Java
3w
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Software Developer I
Aberdeen Proving Ground, Maryland, United States
$95k/yr HybridFull Time
Agile Defense
Agile Defense: Provides IT modernization and cybersecurity for federal government agencies.
1+ YOEMust have Interim Secret/Top Secret clearance to start, obtain Security+ (IAT-II) within 90 days, 1+ years Java experience (Core Java 1.7+), and familiarity with JDBC/MySQL, JMS/Artemis/ActiveMQ, ESB and XML technologies. Bachelor's typical; 0-2 years experience.
C, C++, Java, Core Java (1.7+), JDBC, MySQL, JMS, Artemis, Apache ActiveMQ, Enterprise Service Bus, XML, XSD, XSLT, XPATH, Object XML mapping, GitLab, Apache Ant, IZPack, PHP, JavaScript, REST, Web Services, SNMP, Apache HTTP server, Windows IIS, LDAP, Active Directory, Wireshark, Java PCAP libraries, VMWare ESX, Microsoft HyperV
2w
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2440AS - Software Engineer I
Aberdeen, Maryland, United States
$75k-$98k/yr OnsiteFull Time
Techximius: Provides specialized IT and engineering services for defense missions.
1+ YOEBachelors in computer science or similar, 1-5 years software programming experience, proficiency in Java/C/C++/Python/JavaScript, experience with backend/microservices/web development, strong communication and documentation skills, current DoW clearance required.
Java, C/C++, Python, JavaScript, Node.js, Vue.js, Windows, Linux, Android, UML
1mo
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Software Engineer (Backend Development)
Colorado Springs or King of Prussia
$77k-$152k/yr HybridFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
1+ YOEExperience with Rust/C, Python, Java; Docker, gRPC; SDLC knowledge; 1+ years relevant experience or advanced CS degree. Active Secret clearance and U.S. citizenship required.
Rust, C, Python, Java, Docker, gRPC, Kubernetes, Helm, GitLab CI/CD, REST, Agile
1mo
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Ground Software Engineer
King of Prussia, Pennsylvania, United States
OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
1+ YOEBS degree and typically 1+ years software development experience; active Top Secret clearance with SCI eligibility required; experience with Scaled Agile, DevSecOps, and modern software development tools.
Java, C#, Rust, Angular, Python, Apache Kafka, Apache ActiveMQ, ELK Stack, OpenSearch, PostgreSQL, Redis, Helm, Kubernetes, Git, DevSecOps, CI/CD
1mo
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Ground Software Engineer
King of Prussia, Pennsylvania, United States
OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
1+ YOEActive TS/SCI clearance and US citizenship required, BS degree, typically 1+ years software engineering experience, proficiency in Java/C#/Rust/Angular/Python, Agile/DevSecOps practices, and strong communication skills.
Java, C#, Rust, Angular, Python, Apache Kafka, Apache ActiveMQ, ELK Stack/OpenSearch, PostgreSQL, Redis, Helm, Kubernetes, Git, DevSecOps
1mo
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Ground Software Engineer
King of Prussia or Littleton
$77k-$152k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
1+ YOEActive Top Secret/SCI clearance, BS degree, typically 1+ years professional software experience, ground subsystems and scaled Agile development experience, strong software engineering and communication skills.
Java, Angular, Python, C# .NET, JavaScript, TypeScript, Docker, Kubernetes, Rancher, GitLab, DevSecOps, CI/CD, SAFe
1w
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Associate Full Stack Developer
Villanova, Pennsylvania, United States
$72k-$90k/yr HybridFull Time
Villanova University
Villanova University: Private Catholic research university providing higher education and research.
0+ YOEFoundational web development skills with 0–2 years experience. Familiarity with JavaScript/HTML/CSS, APIs, accessibility, and web performance. Strong communication, problem-solving, and willingness to learn AEM, cloud delivery, and integrations.
Adobe Experience Manager (AEM), AEM as a Cloud Service, AEM Edge Delivery Services, Modo Labs, OneCampus, Google Analytics, Google Tag Manager, React, Java
1w
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Software Engineer II-Python/PySpark
Wilmington, Delaware, United States
OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
2+ YOE2+ years applied software engineering experience; hands-on PySpark and Python; experience with ETL, Airflow, Iceberg, Snowflake/Databricks, AWS; SDLC, automation and CI/CD proficiency; strong communication and problem solving.
PySpark, Python, Iceberg, AI, AWS, Data Pipeline, Airflow, Snowflake, Databricks, SQL, Java
1mo
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Applications Engineering, Sr Engineer
Chantilly or Exton or United States
$95k-$142k/yr HybridFull Time
Synopsys
SynopsysNasdaq: SNPS: Provides software and IP for semiconductor design and manufacturing.
2+ YOEBS/MS in engineering, physics, or CS; 2+ years in engineering software; hands-on experience with Ansys/STK/ODTK/MSBE/CAD; programming in C/C++/C#/Java/MATLAB/Python; eligible for DoD TS/SCI clearance; up to 25% domestic travel.
Digital Mission Engineering (DME), Ansys, STK, ODTK, MSBE, CAD, C, C++, C#, Java, MATLAB, Python
1mo
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Senior Technical Support Engineer
Exton, Pennsylvania, United States
$76k-$114k/yr OnsiteFull Time
Synopsys
SynopsysNasdaq: SNPS: Provides software and IP for semiconductor design and manufacturing.
0+ YOEBS in engineering with 2+ years (or MS with 0+ years); coding in Python, MATLAB, C++, or Java; experience with Ansys or comparable CAE/CAD/EDA/PLM tools; strong written/verbal communication and troubleshooting skills.
STK, ODTK, TETK, Python, MATLAB, C++, Java, Ansys, CAE, CAD, EDA, PLM
1mo
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AI/ML Engineer
Aurora or King of Prussia
$82k-$172k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
2+ YOEActive TS/SCI with Poly, BS in ML/CS/math, 2+ years developing AI/ML applications, strong Python skills (Pandas, scikit-learn, TensorFlow, Keras, PyTorch), experience with ML techniques, Linux and AWS.
Python, Pandas, scikit-learn, TensorFlow, Keras, PyTorch, Hugging Face, LangChain, Linux, AWS EC2, AWS S3, AWS Lambda, OpenAI Gym, RLlib, Stable Baselines, C++, Java, C#, CUDA, YOLO, Faster-RCNN, Transformers, RNNs, GANs, Variational Autoencoders
2w
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Backend Software Engineers - King of Prussia, PA
King of Prussia, Pennsylvania, United States
$75k-$150k/yr OnsiteFull Time
In-Depth Engineering
In-Depth Engineering: Develops combat systems and radar software for the US military.
2+ YOEU.S. citizen with valid passport and active Secret clearance; Bachelor's in STEM; 2+ years experience; familiarity with Rust/C/Java, Docker, gRPC, SDLC; exposure to containerization and Agile.
Rust, C, Java, Docker, gRPC, Kubernetes, Helm, Gitlab CI/CD, Python, Selenium, Cypress, Playwright
3w
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Supply Chain Engineer II
Kutztown, Pennsylvania, United States
OnsiteFull Time
NFI Industries
NFI Industries: A third-party logistics and supply chain providing transportation, warehousing, and integrated logistics solutions.
1+ YOEBachelor's degree required, 1+ years supply chain/engineering experience, Lean Six Sigma project experience, SQL/Access/Alteryx database skills, data manipulation/programming ability, and up to 25% travel.
SQL, Microsoft Access, Alteryx, AutoCAD, Warehouse Management System (WMS), API/EDI, VBA, Python, R, Matlab, Java, C++, C#
2mo
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Trading System Engineering Internship: Summer 2027
Bala Cynwyd, Pennsylvania, United States
OnsiteInternship
Susquehanna International Group
Susquehanna International Group: Global quantitative trading firm specializing in proprietary financial markets.
Enrolled in a bachelor's or master's program in CS/CE/Math; strong C++, C, Rust, C#, Java; Python experience; aiming to graduate by Aug 2028; visa sponsorship available.
C++, C, Rust, C#, Java, Python
4w
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Cyber Security Code Analyst, Mid
Belcamp, Maryland, United States
$62k-$141k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
1+ YOE1+ years coding experience with Java, C/C++, or Python; knowledge of SDLC/DevSecOps and IEEE/CMMI; ability to review software design/docs; Secret clearance and Bachelor's in STEM required.
Java, C, C++, Python, IEEE, CMMI, SDLC, DevSecOps, Understand, Coverity, Klocwork, VHDL, Rust
4w
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Cyber Security Code Analyst, Mid
Belcamp, Maryland, United States
$62k-$141k/yr HybridFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
1+ YOESecret clearance, Bachelor’s degree in STEM, 1+ years experience with Java, C/C++, or Python, knowledge of SDLC/DevSecOps and software development best practices (IEEE or CMMI), ability to review design docs.
Java, C, C++, Python, IEEE, CMMI, SDLC, DevSecOps, Understand, Coverity, Klocwork, VHDL, Rust