Top 137 Ui java/python developer, mid level ts/sci with poly required Jobs in Poolesville, Md

Junior-Mid Backend Software Engineer, TS/SCI with CI Poly - $95K-$180K + 15% 401k
Millennial Software Solutions Inc —Chantilly, VA
- $95,000 - $180,000 a year
- Azure
- Mid-level
- Office
- Paid training
- Paid holidays
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Software Automation Test Lead
Amatriot Group, LLC —Fairfax, VA
- $140,000 - $155,000 a year
- Full-time
- Senior level
- Communication skills
- 10 years
Quick Apply
1d
Ping Identity Platform Sr. Developer
Deloitte —McLean, VA
- Rotating shift
- Bachelor of Science
- JavaScript
- Product management
Biomedical Engineer Senior
Castalia Systems —Reston, VA
- $102,000 - $108,000 a year
- Full-time
- Analysis skills
- Travel
- Senior level
- Paid training
- Paid holidays
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Weapons System Analyst, Sr.
Castalia Systems —Reston, VA
- $116,000 - $125,000 a year
- Full-time
- 8 years
- Analysis skills
- Travel
- Paid training
- Paid holidays
Quick Apply
QA Testing Analyst IV
Technology Ventures —Reston, VA
- Contract
- Computer science
- Computer Science
- Master's degree
Executive Assistant Mid-Level
Zel Technologies —Reston, VA
- $80,000 - $90,000 a year
- Full-time
- Microsoft Outlook
- Pass drug screening
- Mid-level
- Paid jury duty
- Health savings account
1d
GIS Engineer (Mid)
Vantor Services Inc. —Reston, VA
- $83,000 - $139,000 a year
- Full-time
- Azure
- System design
- Mid-level
- 401(k) matching
- Pet insurance
Quick Apply
Software Automation Test Lead
ASRC Federal —Merrifield, VA
- Full-time
- Computer science
- Computer Science
- Office
- Paid holidays
- Health insurance
Sr. DevSecOps Engineer
TapHere! Technology —Chantilly, VA
- 7 years
- Computer Science
- Office
Senior Distinguished Engineer
Capital One —McLean, VA
- Email
- Computer science
- Computer Science
- 5 years
- Health insurance
14d
Senior Front-End Software Development Engineer
Vantor Services Inc. —Herndon, VA
- $137,000 - $200,200 a year
- Full-time
- Hybrid work
- Azure
- 11+ years
- Office
- 401(k) matching
- Pet insurance
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Data Scientist - Mid
Vantor Services Inc. —Reston, VA
- $90,000 - $132,000 a year
- Full-time
- Mid-level
- 8 years
- SQL
- 401(k) matching
- Pet insurance
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ui java/python developer, mid level ts/sci with poly required jobs near poolesville, md

Junior-Mid Backend Software Engineer, TS/SCI with CI Poly - $95K-$180K + 15% 401k

Millennial Software Solutions Inc
Chantilly, VA

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Job Details

$95,000 - $180,000 a year

Benefits

Paid training
Paid holidays
Disability insurance
Health insurance
Dental insurance
401(k)
Paid time off
Parental leave
Vision insurance
401(k) matching
Life insurance

Qualifications

Containerization systems
Authentication
Data model design
Software engineering
Authorization controls implementation
Data modeling projects
Triage
Public Cloud
Schema design
Collaboration with product development teams
Implementation (software development lifecycle)
Query execution time improvement
Continuous integration
Incident response (Crisis management methodologies)
Developing and maintaining backend systems
TS/SCI with Polygraph
Design (software development lifecycle)
Cross-functional communication

Full Job Description

Description:

About Millennial Software:

Millennial Software is revolutionizing the landscape of security and defense by leveraging our core competencies in software development, automation, DevSecOps, and machine learning.

We are an employee-owned company, every employee receives equity in the company
100% company-paid medical, dental, and vision premiums for you and all dependents
Ability to get increased salary if you don't need medical/dental/vision
100% company-paid disability and life insurance benefits
15% 401(k) company contribution
30 days of PTO/holidays
Generous training budget
Paid Paternal and Maternal Leave
Business development / growth incentives
Top notch company swag

Job Description:

Millennial Software is seeking a Junior - Mid level Backend Software Developer to join our collaborative team supporting National Security. You’ll design, develop, and support scalable APIs and services using a tech stack that power data-driven applications and enable mission-critical decisions. You will focus on backend architecture, data modeling, integrations, performance, and reliability while partnering with frontend engineers, analysts, and users.

The ideal candidate is passionate about the full lifecycle—design, coding, testing, deployment, and sustainment—and comfortable delivering secure, high-quality tools in mission environments.

Essential Functions:

Design, implement, and maintain backend services, APIs, and integrations that support product features.
Develop data models and persistence layers; ensure data quality, integrity, and performance.
Build reliable service-to-service communication and integration patterns (REST/GraphQL, messaging, streaming).
Apply secure coding practices and ensure appropriate authentication/authorization patterns.
Create and maintain automated tests (unit/integration) and participate in peer code reviews.
Diagnose and resolve production issues; improve reliability through monitoring, alerting, and runbooks.
Collaborate with frontend engineers and other stakeholders to define contracts and support end-to-end delivery.
Identify bottlenecks and drive performance improvements (latency, throughput, resource utilization).
Produce technical documentation for systems, APIs, and operational procedures.

Requirements:

Required Qualifications:

Demonstrated experience building and operating production backend services and APIs.
Proficiency in at least one backend language (e.g., Python, Java, Go, C#, Node.js) and common frameworks.
Strong understanding of API design, authentication/authorization concepts, and service reliability.
Experience with relational and/or NoSQL databases, query optimization, and schema/data modeling.
Experience with messaging and queuing platforms such as Kafka, RabbitMQ, or similar.
Familiarity with testing strategies and CI workflows; comfort with debugging and incident triage.
Ability to collaborate cross-functionally and communicate technical decisions clearly.
Experience creating and maintaining Docker containers, Helm charts, orchestration platforms such as Kubernetes clusters, and using cloud infrastructure services (AWS/Azure/GCP).
Bachelor’s degree in a related field or equivalent practical experience.
At least 2-10 years performing backend software engineering.
Active TS/SCI clearance.
Ability to work on-site at one of the following locations - Virginia: Fairfax, Chantilly, McLean, Sterling, or Colorado: Colorado Springs.

Nice to have:

Experience designing distributed systems (caching, queues, streaming, idempotency, retries, circuit breakers).
Observability experience: metrics, logging, tracing; familiarity with SLOs/SLIs and incident response practices.
Experience with data pipelines, ETL/ELT, or search platforms.
Knowledge of security best practices (threat modeling, secrets management, secure SDLC).
Experience with performance testing and capacity planning.

Millennial Software Solutions Inc. is an Equal Opportunity Employer and does not discriminate in employment on the basis of race, color, religion, sex, national origin, political affiliation, sexual orientation, gender identity, marital status, disability and genetic information, age, membership in an employee organization, or other non-merit factor.

Quick Apply

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ui java/python developer, mid level ts/sci with poly required jobs in poolesville, md

Junior-Mid Backend Software Engineer, TS/SCI with CI Poly - $95K-$180K + 15% 401k

Software Automation Test Lead

Ping Identity Platform Sr. Developer

Biomedical Engineer Senior

Weapons System Analyst, Sr.

QA Testing Analyst IV

Executive Assistant Mid-Level

GIS Engineer (Mid)

Software Automation Test Lead

Sr. DevSecOps Engineer

Senior Distinguished Engineer

Senior Front-End Software Development Engineer

Data Scientist - Mid

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