19 principle developer jobs at 12 companies in Brookside, DE

4d
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Senior AI/ML Engineer
Malvern or Philadelphia or Charlotte
HybridFull Time
Vanguard
Vanguard: Provides mutual funds, ETFs, and investment management services.
5+ YOEMaster’s degree in a related field, 5–8 years of AI/ML or software development experience, Python, ML frameworks, LLMs, agentic principles, vector databases, data pipelines, and retrieval systems.
Python, TensorFlow, PyTorch, scikit-learn, AWS, MLOps
1w
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Manufacturing Engineer
North Wales, Pennsylvania, United States
$75k-$120k/yr OnsiteFull Time
Gwynedd Manufacturing
Gwynedd Manufacturing: Manufactures precision firearm components and equipment for defense sectors.
3+ YOEDevelop and sustain CNC machining and inspection processes; design tooling and fixtures; troubleshoot machining and tooling; read blueprints; apply ISO 9001 principles.
CNC, FeatureCAM, PartMaker, PowerMill, NX
2mo
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Traffic Design Engineer
Hunt Valley, Maryland, United States
$39-$47/hr OnsiteFull Time
Johnson, Mirmiran & Thompson
Johnson, Mirmiran & Thompson: Provides multidisciplinary engineering, architecture, and technology infrastructure services.
Perform traffic engineering design and analysis using engineering principles, prepare plans and computations, analyze survey data, develop cost estimates, and coordinate with project teams.
1mo
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Advanced RF Engineer
Lansdale, Pennsylvania, United States
OnsiteFull Time
Honeywell International
Honeywell InternationalNASDAQ: HON: Designs and manufactures technologies for aerospace, buildings, and industry.
Proven RF design experience for aerospace, knowledge of RF principles and antenna design, proficiency with Keysight ADS/Cadence AWR/ANSYS HFSS/CST, RF testing and validation experience, and ability to obtain security clearance.
Keysight ADS, Cadence AWR, ANSYS HFSS, CST, software-defined radio (SDR)
1mo
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Manufacturing Methods Engineer - Early / Mid-Career
Moorestown, New Jersey, United States
$65k-$139k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
3+ YOEUS citizen with Secret clearance, typically 3+ years engineering experience; ability to develop/optimize assembly processes, write process instructions, apply Lean principles, work with drawings/models, use MES and Microsoft Office, and train production personnel.
Manufacturing Execution Systems (MES), Microsoft Office
1d
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Supply Chain Engineer
Camden, New Jersey, United States
$80k-$100k/yr OnsiteFull Time
Holtec International
Holtec International: Provides nuclear fuel storage systems and small modular reactors.
Bachelor’s degree in engineering or a related scientific discipline, strong engineering principles, communication, troubleshooting, critical thinking, multitasking, and deadline-management skills. All experience levels considered.
Microsoft Project, P6, AutoCAD, SolidWorks
1mo
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Signal Integrity Engineer
Valley Green or Yocumtown or Nashua
OnsiteFull Time
Amphenol
AmphenolNYSE: APH: Manufactures electronic and fiber optic connectors and interconnect systems.
BS in Electrical Engineering or Physics required; hands-on frequency- and time-domain characterization; experience with TDR, VNA, pattern generators, error detectors; understanding of electromagnetic principles; EM simulation tools preferred.
TDR, VNA, pattern generators, error detectors, Ansys HFSS, Designer, CST Microwave, HSPICE, MatLab, ADS
1mo
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Elasticsearch Lead Engineer - SIEM Platform
Malvern or Charlotte or Dallas or Fort Worth
HybridFull Time
Vanguard
Vanguard: Provides mutual funds, ETFs, and investment management services.
6+ YOE6+ years Elasticsearch experience, undergraduate degree or equivalent, expertise with ECS, AWS, data streaming and data lake integrations, infrastructure-as-code, security principles, and mentoring experience.
Elasticsearch, Elastic Common Schema (ECS), Kibana, AWS S3, Kinesis Data Streams, Lambda, CloudWatch, EC2, IAM, Secrets Manager, AWS CloudFormation, Apache Kafka, Confluent Platform, Apache Iceberg, Terraform, Ansible, CDK, Elastic Security / SIEM, ECK, Kubernetes
1mo
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Senior Signal Integrity Engineer
Yocumtown or Valley Green
HybridFull Time
Amphenol
AmphenolNYSE: APH: Manufactures electronic and fiber optic connectors and interconnect systems.
BS in Electrical Engineering or Physics required; hands-on frequency/time-domain characterization, TDR/VNA measurement experience, EM principles understanding; BLS/CPR not applicable; MS/PhD and 2+ years preferred.
ANSYS HFSS, ANSYS Designer, CST Microwave Studio, HSPICE, MATLAB, ADS, TDR, VNA, pattern generator, error detector
1mo
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Senior Signal Integrity Engineer
Valley Green or Yocumtown
HybridFull Time
Amphenol
AmphenolNYSE: APH: Designs and manufactures electrical connectors and interconnect systems.
BS in Electrical Engineering or Physics required. Hands-on frequency- and time-domain characterization experience; experience with TDR, VNA, pattern generators; understanding of electromagnetic principles. MS/PhD and 2+ years industry experience preferred.
TDR, VNA, pattern generators, error detectors, ANSYS HFSS, ANSYS Designer, CST Microwave Studio, HSPICE, MATLAB, ADS
3w
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Returning New Grad Engineer I - Winter/Summer 2027 - Northeast Division (For Current/Former HNTB Interns Only)
New York or South Portland or Princeton or Bedford or Boston or Newark or Cherry Hill or Parsippany or South Norwalk or Rocky Hill or Chelmsford
$66k-$125k/yr OnsiteFull Time
HNTB
HNTB: Infrastructure design and engineering for transportation and public works
Bachelor's degree in Engineering required; knowledge of engineering principles; familiarity with Microsoft Office, MicroStation and/or AutoCAD; EIT preferred; master's preferred.
Microsoft Office, MicroStation, AutoCAD
3w
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Returning New Grad Engineer I - Winter/Summer 2027 - Northeast Division (For Current/Former HNTB Interns Only)
New York or South Portland or Princeton or Bedford or Boston or Newark or Cherry Hill or Parsippany or South Norwalk or Rocky Hill or Chelmsford
$66k-$125k/yr OnsiteFull Time
HNTB
HNTB: Designs and manages large-scale transportation and infrastructure projects.
Bachelor's degree in Engineering required; understanding of engineering principles; familiarity with Microsoft Office, MicroStation and/or AutoCAD; EIT preferred; Master's preferred.
Microsoft Office Suite, MicroStation, AutoCAD
2w
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Returning New Grad Engineer I - Winter/Summer 2027 - Mid Atlantic Division (For Current/Former HNTB Interns Only)
Philadelphia or Harrisburg or Charlotte or Whitehall or Pittsburgh or Baltimore or Fairmont or Elkins or Raleigh or North Charleston or Washington or Glen Allen or King of Prussia or Arlington or Scott Depot
$66k-$115k/yr OnsiteFull Time
HNTB
HNTB: Designs and manages large-scale transportation and infrastructure projects.
Bachelor's degree in Engineering; familiarity with Microsoft Office, MicroStation and/or AutoCAD; understanding of engineering principles; EIT preferred; Master's and EIT are preferred.
Microsoft Office, MicroStation, AutoCAD
1w
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Returning Intern Engineer - Summer 2027 - Mid Atlantic Division (For Current/Former HNTB Interns Only)
Philadelphia or Raleigh or Charlotte or Virginia Beach or Scott Depot or Harrisburg or North Charleston or Washington or Pittsburgh or Arlington or Baltimore or King of Prussia
$21-$36/hr OnsiteFull Time
HNTB
HNTB: Infrastructure design and engineering for transportation and public works
Current enrollment in an accredited post‑secondary engineering program, high school diploma/GED or equivalent; understands basic engineering/math principles and Microsoft Office proficiency.
Microsoft Office
2mo
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Associate or Senior Associate, Fixed Assets / Cost Segregation Engineer (AMCS)
Boston or New York City or Philadelphia or Pittsburgh
OnsiteFull Time
KPMG
KPMG: Global professional services network providing audit, tax, and advisory.
1+ YOEBachelor's in engineering/architecture/construction management,1+ year experience (2+ preferred for Senior),knowledge of construction/building systems,familiarity with federal depreciation principles,advanced Excel and data tools.
Microsoft Excel, Power Query, Alteryx, Power BI, Tableau, SQL, Python, R
4d
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Associate Metallurgist – Technology
Reading, Pennsylvania, United States
OnsiteFull Time
Carpenter Technology
Carpenter TechnologyNYSE: CRS: Manufactures and distributes high-performance specialty alloys and powders.
0+ YOEBachelor’s degree in metallurgical engineering, materials science, chemical engineering, or related field; 0–2 years of relevant experience; knowledge of metallurgical principles, equipment, statistics, Six Sigma, and BPI.
Six Sigma, BPI
1mo
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Underwriting Director (Contract Surety)
Timonium, Maryland, United States
$97k-$189k/yr OnsiteFull Time
CNA
CNANYSE: CNA: Provides commercial property and casualty insurance and risk management.
7+ YOEBachelor's in Business, typically 7+ years underwriting experience, ability to lead and develop underwriters, strong analytical, communication and negotiation skills, knowledge of underwriting principles and Microsoft Office.
Microsoft Office
1w
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SY26-27 Assistant Teacher- High Impact Tutoring
Philadelphia, Pennsylvania, United States
$21-$24/hr OnsitePart Time
School District of Philadelphia
School District of Philadelphia: Providing K-12 public education services in Philadelphia.
Minimum 30 college credits or current enrollment/graduation from an accredited college; able to work 20 hours/week per tutoring schedule; knowledge of education principles and child development.
3w
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Child Care Worker Part Time Kindred House
West Chester, Pennsylvania, United States
$17/hr OnsitePart Time
Gaudenzia
Gaudenzia: Provides comprehensive addiction and mental health treatment services.
High school diploma/GED required. Knowledge of child care and early childhood development, drug/alcohol program principles, ability to work with clients, maintain records, and hold a valid driver's license.

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