Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
1mo
Save
Mark Applied
Hide
Backend Engineer
Arvada or San Francisco or Washington or Seattle or Los Angeles
$120k-$180k/yr HybridFull Time
3+ YOE3+ years backend development experience, proficiency with Python, AWS, GraphQL, Docker, Terraform, Kubernetes, Git; Bachelor’s in CS or related; U.S. Person required and ability to obtain U.S. security clearance.
Python, GraphQL, Docker, Terraform, OpenAI, Anthropic, AskSage, Kubernetes, EC2, S3, RDS, Fargate, EKS, Lambda, ECS, CloudWatch, EFS, EBS, Git, GitHub, GitLab, Fargate
2mo
Save
Mark Applied
Hide
Senior Backend Developer
Vienna, Virginia, United States
OnsiteFull Time
5+ YOEBachelor's in CS/engineering/GIS; 5+ years backend experience; Python, Node.js, Java; REST APIs; ArcGIS Enterprise; containerized environments; TS/SCI eligibility.
Python, JavaScript/Node.js, Java, ArcGIS Enterprise, Docker, Kubernetes, REST API, PostgreSQL, PostGIS, SQL Server
2mo
Save
Mark Applied
Hide
Backend Engineer
Tysons Corner, Virginia, United States
HybridFull Time
10+ YOE10+ years software development; 5+ years Node.js/Express; expert JavaScript/TypeScript; REST APIs; SQL (PostgreSQL); NoSQL; AWS; Unix/Linux; strong problem solving; collaboration; background checks.
Node.js, Express, JavaScript, TypeScript, REST APIs, PostgreSQL, MongoDB, DynamoDB, AWS, Lambda, ECS, EC2, RDS, S3, API Gateway, Git, Unix/Linux, Docker, Docker Compose, AWS CDK
1mo
Save
Mark Applied
Hide
Backend Software Developer
Springfield or Vienna or St. Louis
OnsiteFull Time
2+ YOE2+ years backend development; Node.js, Python/Java; REST APIs; ArcGIS Enterprise; Docker/Kubernetes; on-site; Top Secret clearance.
Node.js, Python, Java, ArcGIS Enterprise, Docker, Kubernetes, REST APIs, PostgreSQL, PostGIS, SQL Server
3mo
Save
Mark Applied
Hide
Senior Backend Engineer
Vienna, Virginia, United States
OnsiteFull Time
5+ YOE5+ years software engineering; Rust preferred; API/service/storage backend experience; distributed systems; on-call readiness; mentorship.
Rust, APIs, Storage engines, Query engines
1mo
Save
Mark Applied
Hide
Backend Web Developer
Washington, District of Columbia, United States
OnsiteFull Time
Bachelor's degree (or equivalent) and experience developing backend applications with Python and Java; strong PostgreSQL, Elasticsearch, AWS, Docker, GitLab, and automated testing (Pytest/JUnit) skills; strong problem-solving and communication.
Python, Java, PostgreSQL, Elasticsearch, AWS, Docker, Pytest, JUnit, GitLab
1mo
Save
Mark Applied
Hide
Senior Engineer, Backend
Washington, District of Columbia, United States
HybridFull Time
Production experience building backend services in TypeScript and Go, PostgreSQL schema and query optimization, AWS and containerized deployments, API design, AI-assisted development experience; U.S. citizenship and bachelor's or equivalent required.
TypeScript, Go, Python, Claude Code, Cursor, AWS, Docker, ECS, EKS, PostgreSQL, REST, gRPC, RabbitMQ, SQS, Kafka, React, OPA/Rego
1mo
Save
Mark Applied
Hide
Sr Backend Developer
Herndon, Virginia, United States
RemoteFull Time
7+ YOEBachelor's degree, U.S. citizenship with Public Trust eligibility, 7+ years back-end development (3+ years senior/lead), AWS/Kubernetes experience, CI/CD (Jenkins/GitHub Actions), and tools such as Git, SonarQube, NexusIQ, Selenium, AppDynamics.
AWS, Kubernetes, Jenkins, GitHub Actions, SonarQube, NexusIQ, Selenium, AppDynamics, Git, NIST 800-53, FISMA, FedRAMP, IRS Publication 4812
3mo
Save
Mark Applied
Hide
Backend Developer, Data Platform
Reston, Virginia, United States
$113k-$188k/yr HybridFull Time
5+ YOE5+ years backend software engineering; strong Python; PostgreSQL; Elasticsearch; AWS (S3, RDS); TS/SCI clearance with CI polygraph; Bachelor's in CS/Systems Eng or equivalent; strong debugging and CI/CD skills.
Python, PostgreSQL, Elasticsearch, AWS, S3, RDS, Docker, OpenShift, Helm, Gitlab CI, CI/CD
1w
Save
Mark Applied
Hide
Backend / Integration Engineer
Washington, District of Columbia, United States
$75-$80/hr HybridFull Time
6+ YOEBachelor's in CS or related (or equivalent experience),6+ years experience (4+ in backend/API integration),strong Python backend skills,REST async integration,Databricks/Spark familiarity,JSON schema design,active Secret clearance with TS/SCI eligibility.
Databricks REST API, Databricks, Spark, Python, JSON, Duality, ServiceNow REST API, ZenML, React, REST API
1w
Save
Mark Applied
Hide
Mid-Level Backend Developer (AWS)
Washington, District of Columbia, United States
$72k-$115k/yr HybridFull Time
5+ YOEBachelor's degree, 5+ years development experience, 3+ years with JavaScript/React, 3+ years Node.js backend, 2+ years AWS, SQL experience, strong problem solving and communication skills; US citizenship and ability to obtain DHS Public Trust.
React, React Native, JavaScript, TypeScript, Node.js, AWS, AWS Lambda, DynamoDB, SQL, RESTful APIs, Git, Jenkins
2w
Save
Mark Applied
Hide
Backend AI engineer
Tysons, Virginia, United States
RemoteFull Time
3+ YOE3+ years backend or AI engineering experience; strong Python/Java/Go skills; experience with scalable APIs, microservices, cloud (AWS/Azure/GCP), Docker/Kubernetes, LLMs, vector databases, and production ML integration.
Python, Java, Go, LLMs, LangChain, OpenAI APIs, Hugging Face, Pinecone, Redis, vector databases, AWS, Azure, Google Cloud Platform, Docker, Kubernetes, CI/CD pipelines
4w
Save
Mark Applied
Hide
Senior Backend Developer, Data Platform
Reston, Virginia, United States
$137k-$200k/yr HybridFull Time
10+ YOEU.S. citizenship and active TS/SCI with CI polygraph required. 10+ years backend engineering experience, strong Python, PostgreSQL, Elasticsearch, AWS (S3, RDS), CI/CD, distributed systems, and bachelor's degree in CS or related field.
Python, PostgreSQL, Elasticsearch, AWS, S3, RDS, GitLab, GitLab CI, OpenShift, Helm, Docker, CI/CD
3mo
Save
Mark Applied
Hide
Backend Java Engineer - Clearance Required
Herndon or Chantilly
OnsiteFull Time
Backend Java experience, Spring or Spring Boot, CI/CD, AWS CodeBuild/Jenkins/GitHub Actions, REST APIs, containerization, and data platform integration.
Java, Spring, Spring Boot, CI/CD, AWS, CodeBuild, Jenkins, GitLab CI, GitHub Actions, REST, HTTP, DevSecOps, Terraform, OpenSearch / Elasticsearch / Solr, Kubernetes, Docker
2w
Save
Mark Applied
Hide
Senior Backend Engineer - Java
United States or Tampa or Boston or Atlanta or New York City or Columbus or Chicago or Philadelphia or Raleigh or Charlotte or Minneapolis or Dallas or Washington D.C. or Austin or Miami or Newark
$152k-$194k/yr RemoteFull Time
8+ YOE8+ years experience with Java/Spring Boot, JPA/Hibernate, relational databases; experience designing event-driven microservices, strong testing practices, AI-assisted development familiarity, BA/BS or equivalent.
Java 17, Java 21, Spring Boot 3.x, JPA/Hibernate 6, Postgres, Kafka, DynamoDB, Redis, OpenSearch, AWS, Docker, Kubernetes, Datadog, ArgoCD, TeamCity, Claude Code, Cursor, Codex, Model Context Protocol (MCP), GitHub, SonarQube
1mo
Save
Mark Applied
Hide
Backend Software Engineer - Saga
New York or Seattle or Arlington or Rosslyn
OnsiteFull Time
4+ YOE4+ years backend software engineering; experience with GenAI systems, vector databases, LLM integrations, and evaluation harnesses; strong problem solving and ownership.
GenAI, vector databases, LLM integrations, RAG architectures, tool-call frameworks, production-grade software
2mo
Save
Mark Applied
Hide
Back-End Developer
McLean, Virginia, United States
$87k-$198k/yr OnsiteFull Time
3+ YOE3+ years in software development; experience with Java and Docker; TS/SCI clearance; associate or bachelor’s degree with software engineering experience
Java, Docker
2mo
Save
Mark Applied
Hide
Back-End Developer
McLean, Virginia, United States
$87k-$198k/yr HybridFull Time
3+ YOE3+ years in software development; Java; Docker; experience with unbounded data streams; TS/SCI clearance; Associate or Bachelor degree with relevant experience
Java, Docker, Kubernetes, Kotlin, Python, Agile
1mo
Save
Mark Applied
Hide
Backend Developer (TS/SCI Required)
Alexandria, Virginia, United States
$150k-$190k/yr OnsiteFull Time
10+ YOE10+ years software development; 5+ years as software architect; TS/SCI with counterintelligence polygraph; Bachelor in CS; cloud experience (AWS/Azure/Google Cloud); Python; Go/Rust/Java; knowledge of auth, caching, and distributed systems.
Python, Go, Rust, C/C++, Java, Kubernetes, LDAP, SAML, OAuth, JWT, AWS, Azure, Google Cloud
2mo
Save
Mark Applied
Hide
Software Engineer - Backend (Cleared)
Minneapolis or Washington
$125k-$190k/yr HybridFull Time
3+ YOEActive US security clearance required; Bachelor’s in CS or related field; 3+ years backend development; proficient Python; Kubernetes experience; knowledge of software security standards.
Python, Kubernetes, Django, PostgreSQL, Solr, Rust
Explore Jobs