Senior Software Full Stack Engineer

ZipStaff Inc.; McLean (VA); On-site; USD 96,000 - 165,000; Part time

Benefits offered by this job

Health Insurance

Dental Insurance

Vision Insurance

401(k) + 401(k) matching

Paid time off

Referral Program

Job summary

ZipStaff Inc. is seeking a Senior Software Development Engineer to design, build, and operate high-availability full-stack and backend systems in an on-site McLean, VA setting.

You will leverage Go, Java, Node.js or C# and work across databases like PostgreSQL, MySQL, MongoDB, and DynamoDB, with strong emphasis on security, performance, and scalable architecture. You will apply microservices and serverless patterns in AWS, integrate AI-assisted tooling, and collaborate with cross-functional

Qualifications

• 5+ years building and operating production-grade full-stack apps in AWS.
• 5+ years with Go, Java, Node.js, or C# development.
• 3+ years distributed architecture using microservices or serverless in AWS, Google, or Azure.
• 3+ years experience with SQL and NoSQL databases.
• Experience designing and implementing RESTful APIs and microservices.
• Experience in CI/CD pipeline setup and maintenance.
• Knowledge of authentication, authorization, and security best practices.
• Experience using generative AI tools to accelerate development and review AI-generated code.
• Ability to obtain a TS/SCI clearance.
• On-site work in McLean, VA.

Responsibilities

• > Design and develop software products meeting user needs and market demands.
• </br>Apply engineering principles to build efficient, bug-free systems.
• > Collaborate with designers, product managers, and engineers to launch products.
• > Architect secure, scalable backend applications.
• > Work on front-end and back-end using Go/Node.js/Java/C#.
• > Integrate services with PostgreSQL, MySQL, MongoDB, DynamoDB.
• > Write clean, tested code with performance and security considerations.
• > Integrate generative AI to accelerate development.
• > Communicate trade-offs to stakeholders.
• > Stay aligned with industry trends and security compliance.
• > Implement CI/CD, telemetry, canaries, automated testing.

Skills

Go

Java

Node.js

C#

AWS

RESTful APIs

CI/CD

Security best practices

Generative AI

TS/SCI clearance

On-site McLean

Education

Bachelor’s degree in software engineering

5+ years experience without degree

Tools

PostgreSQL

MySQL

MongoDB

DynamoDB

Job description

Job Title: Senior Software Development Engineer – Full Stack / Backend (Go, Java, Node.js)

Location: McLean, VA (On-site)

Employment Type: Contract (W2 through ZipStaff — No C2C or 1099)

About the Opportunity

ZipStaff is seeking an experienced Senior Software Development Engineer to join the chief technology office engineering team at a global technology consulting and professional services firm.

You will focus on building the Software-Defined Everything (SDE) platform to enable Physical AI, Edge, Trusted Environments, and other applications across mission domains. This role involves designing, developing, deploying, and operating high-availability software products with robust monitoring, alerting, and fault-tolerant capabilities, integrating agentic AI at their core. You will work as a self-starter with genuine autonomy and ownership on internal platform development.

What You’ll Do:

• Design and develop software products that meet user needs and market demands.
• Apply engineering principles to construct and maintain efficient, bug‑free software systems.
• Collaborate with designers, product managers, and other engineers to bring products from concept to launch.
• Architect secure, scalable, and high‑performance backend applications.
• Work on both front‑end and back‑end development using languages such as Go, Node.js, Java, or C#.
• Integrate backend services with relational and NoSQL databases such as PostgreSQL, MySQL, MongoDB, and DynamoDB.
• Write clean, efficient, testable code following best practices for performance, maintainability, and security.
• Integrate generative AI tools to accelerate development and enhance product design.
• Communicate design decisions and technical trade‑offs clearly to both technical and non‑technical stakeholders.
• Contribute to a culture of innovation and technical excellence by keeping abreast of industry trends.
• Embed security checks and compliance requirements into the development process to meet relevant standards.
• Implement best practices for CI/CD deployments, telemetry, canaries, and automated testing.

Required Qualifications:

• 5+ years of experience building and operating production‑grade full‑stack applications in cloud environments such as AWS.
• 5+ years of experience with Go, Java, Node.js, or C# development.
• 3+ years of experience in distributed architectures using microservices or serverless in AWS, Google, or Azure Cloud.
• 3+ years of experience with SQL and NoSQL databases.
• Experience designing and implementing RESTful APIs and microservices.
• Experience in CI/CD pipeline setup and maintenance.
• Knowledge of authentication, authorization, and security best practices.
• Experience using generative AI tools to accelerate development, automate coding tasks, and review AI‑generated code.
• Ability to obtain a TS/SCI clearance.
• Bachelor’s degree and 3+ years of experience in software engineering, or 5+ years of experience in software engineering in lieu of a degree.
• Ability to work on‑site in McLean, VA.

Preferred Qualifications:

• Experience writing source code for new applications or generating and enhancing code samples for existing applications.
• Experience acquiring client requirements and resolving workflow problems through automation optimization.
• Ability to work with automated testing tools to perform testing and maintenance.
• Active or prior TS/SCI clearance.
• Master’s degree.
• AWS Certifications, such as Cloud Practitioner, Developer Associate, or Solutions Architect Associate.
• Prior experience supporting platform or mission‑oriented software development in a consulting or professional services environment.

Benefits:

• Health Insurance
• Dental Insurance
• Vision Insurance401(k) + 401(k) matching
• Paid time off
• Referral Program

About ZipStaff:

ZipStaff partners with leading organizations to connect skilled technology professionals with high‑impact contract opportunities. We focus on quality matches, clear communication, and long‑term success for candidates and clients.