Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Web Developer / Application Security (AppSec) Engineer

ASSYST

We are seeking a Web Developer / Application Security (AppSec) Engineer with expertise in secure software development and application security. The ideal candidate will have experience implementing Secure SDLC (SSDLC), DevSecOps automation, vulnerability remediation, and protecting web applications against the OWASP Top 10. Responsibilities Secure web applications and REST APIs through SSDLC and DevSecOps practices, perform application security testing, remediate vulnerabilities, analyze security logs, and implement Web Application Firewall (WAF) and file integrity monitoring. Develop and support applications using REST APIs, SQL, .NET/C#, JavaScript, Python, Node.js, React, and TypeScript, while leveraging security tools including SIEM, IDS/IPS, EDR/NDR, and Wireshark. Preferred Qualifications Experience with federal cybersecurity frameworks, including NIST, FISMA, and FedRAMP. U.S. Citizenship is required due to the nature of the work performed in support of a federal agency. Certifications such as CSSLP, GWEB, CASE, OSWE, OSCP, Security+, GSEC, or equivalent. Strong Application Security and offensive security certifications are highly desirable. ASSYST is an Equal Opportunity Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, disability, military status, national origin or any other characteristic protected under federal, state, or applicable local law. #J-18808-Ljbffr ASSYST

Vacancy posted 1 day ago
Similar jobs that could be interesting for youBased on the Web Developer / Application Security (AppSec) Engineer in Washington DC vacancy
  • Ardent Management Consulting, Inc in Washington, DC is seeking a Web Developer Security Engineer to enhance the security of mission-critical web applications and cloud environments. This role entails integrating security throughout the software development lifecycle, remediating... 
    Application

    Ardent Management Consulting, Inc

    Washington DC
    1 day ago
  •  ...government’s most critical national security and defense priorities, helping protect...  ...begins. Ardent is seeking a Web Developer Security Engineer to join our team. This position is...  ...the security of mission‑critical web applications, APIs, and supporting cloud environments... 
    Application
    Local area
    Remote work
    Flexible hours

    Ardent Management Consulting, Inc

    Washington DC
    1 day ago
  • $110k - $135k

     ...cybersecurity, and cutting-edge application development. We pride ourselves on...  ...Reporting to the Program Manager, the Web Developer Embeds security across the SDLC for mission-...  ...analysis, FIM, WAF management ~3+ Web AppSec / AppSec Engineering / SSDLC ~ Modern web tech incl.... 
    Application

    BaseCamp Consulting & Solutions

    Washington DC
    13 days ago
  •  ...of our clients. PositionTitle: Web Developer Security Engineer Location: US Congressional Budget...  ...Protects CBOs mission-critical web applications, APIs, and sensitive data by...  ...years in Web Application Security, AppSec, or secure SDLC (SSDLC). Development... 
    Application
    Work at office
    Local area
    Remote work

    CMT Services Inc

    Washington DC
    2 days ago
  • $115k - $190k

     ...Job Description Job Description Web Developer Security Engineer Clearance Requirement: Public Trust (Tier 2) Location: Remote/Hybrid...  ...is seeking a Web Developer Security Engineer to support application security initiatives across web applications, APIs, and... 
    Application
    Remote work

    Nationwide IT Services

    Washington DC
    23 days ago
  • ASSYST is seeking a Web Developer / Application Security (AppSec) Engineer focused on secure software development and SSDLC execution. The role emphasizes DevSecOps automation, vulnerability remediation, and protecting web applications from OWASP Top 10 threats. The ideal... 
    Application

    ASSYST

    Washington DC
    1 day ago
  • ASSYST, Inc. in Washington, DC is seeking a Web Developer / Application Security (AppSec) Engineer to build secure software and defend web applications from emerging threats. The role emphasizes implementing SSDLC, DevSecOps automation, vulnerability remediation, and protection... 
    Application

    ASSYST, Inc.

    Washington DC
    1 day ago
  • A government services contractor is seeking a Full Stack Web Developer to support enterprise-wide data initiatives. The role entails software application development, testing strategy development, and team collaboration to create integrated solutions. Candidates should... 
    Application
    For contractors

    CGS Federal (Contact Government Services)

    Washington DC
    4 days ago
  • Web Application Developer - Mid Hybrid (first 60 days on-site then transitions to hybrid) Clearance: Top Secret (will be processed for SCI and...  ...development standards, governance practices, and security guidelines. Communicate project status, risks, and technical... 
    Application

    BOAB Ventures

    Washington DC
    1 day ago
  • Job Overview Front End Developer - Senior Hybrid (first 60 days on...  ...of modern, user‑focused web applications that support mission operations...  ...with UX designers, backend engineers, and product teams to implement...  ...role in delivering secure, scalable, and reliable front... 
    Application

    BOAB Ventures

    Washington DC
    1 day ago
  •  ...Federal Services is seeking a seasoned Full Stack Developer to design and deliver end‑to‑end applications—from database to API to UI—within a classified government...  ..., Terraform, GitLab, and DevSecOps practices in a secure, multi‑partition environment. #J-18808-Ljbffr... 
    Application

    Accenture Federal Services

    Suitland, MD
    22 hours ago
  • A government service provider based in Virginia is seeking a Full Stack Web Developer to enhance software applications within various teams. The ideal candidate will have 11 years of experience and a Bachelor's degree in a related field, showcasing expertise in JavaScript... 
    Application
    Flexible hours

    CGS Federal (Contact Government Services)

    Arlington, VA
    4 days ago
  • Upside is looking for an Application Security Engineer to enhance secure development practices and manage application vulnerabilities. You will work...  ...teams to implement security best practices and evolve our AppSec program. The ideal candidate has 6+ years in application... 
    Application
    Remote job

    Upside

    Washington DC
    1 day ago
  • $98.5k - $184.9k

    A leading technology consulting firm is looking for a skilled UI/UX Engineer/Designer to enhance user interfaces for web applications. The ideal candidate will conduct user research and develop intuitive designs that meet accessibility standards. Responsibilities include... 
    Application

    Accenture

    Arlington, VA
    22 hours ago
  • $62 - $73 per hour

    Full Stack Java Developer (Senior) Rate: $62-73/hr (Can potentially flex for more senior level...  ...deployment, and maintenance of enterprise applications within an Agile environment. This role will be responsible for building secure backend services, modern user interfaces,... 
    Application
    Flexible hours

    BOAB Ventures

    Washington DC
    1 day ago
  • Hopper is looking for a Senior Security Engineer to enhance its security posture by owning tooling, automation, and processes that secure applications throughout their lifecycle. This role involves building systems and working closely with engineering teams to make security... 
    Application

    Hopper

    Washington DC
    1 day ago
  • $174k - $253k

    Senior Security Engineer, AI/ML, National Security, Public Sector Job Level Mid Location and...  ...development. Knowledge of open worldwide application security project (OWASP) for LLMs or...  ...environment for Google's users and developers. Security Engineers work with network... 
    Application
    Temporary work
    Work at office
    Local area
    Remote work
    Worldwide

    Google

    Washington DC
    1 day ago
  • Edgewater Federal Solutions in Washington, DC is seeking an Application Security Engineer who is an expert in cloud technologies and application...  ...federal customers while driving the maturation of the agency's AppSec program. The ideal candidate will have experience in SAST/... 
    Application
    Remote job

    Edgewater Federal Solutions

    Washington DC
    1 day ago
  •  ...Ventures is seeking a Software Engineer to develop and maintain full stack software applications and services supporting AI/ML and...  ..., or similar). Experience with web frameworks, relational and/or non...  ...practices, design patterns, and secure coding principles. Experience... 
    Application

    BOAB Ventures

    Washington DC
    1 day ago
  • Okta is seeking a Staff Product Security Engineer in Washington to enhance security across AI-driven platforms. You will conduct offensive...  ...information security with demonstrated abilities in AI security and application security, capable of mentoring teams and improving security... 
    Application

    Okta

    Washington DC
    1 day ago
  • $174k - $239k

    Secure Every Identity, from AI to Human Identity is the key to unlocking...  ...looking for a Staff Software Engineer that will join the Auth0...  ...protection with minimum developer friction. Identity & Access...  ...addition, Okta offers equity (where applicable), bonus, and benefits,... 
    Application
    Permanent employment
    Local area
    Worldwide
    Flexible hours

    Okta

    Washington DC
    1 day ago
  •  ...Collaborate with a team of engineers to implement *** specific security policies in the CI/...  ...SAST, DAST and SCA applications. Work with...  ...to identify and develop automated security...  ...at a code level in web and mobile applications...  ..., Checkmarx, AppSec SE, Veracode, WhiteSource... 
    Application
    Contract work
    Work experience placement

    US Tech Solutions

    Arlington, VA
    3 days ago
  • Entarian seeks an experienced Senior Full‑Stack Development Lead to guide Agile software teams in delivering secure, scalable enterprise applications. You will steer architecture decisions and enforce best practices across multiple stacks, collaborating with federal leadership... 
    Application

    Sev1Tech LLC

    Washington DC
    1 day ago
  • $140k - $160k

     ...Edgewater is currently seeking an Application Security Engineer who will be a hands-on...  ...an exciting opportunity to develop the federal customer's...  ...agency's Application Security (AppSec) program by defining...  ...Professional (CSSLP) GIAC Web Application Penetration Tester... 
    Application
    Contract work
    Local area
    Remote work

    Edgewater Federal Solutions

    Washington DC
    3 days ago
  • Responsible for leading application security engineering efforts, designing scalable security architectures...  ...and code reviews. Collaborate with developers and DevOps teams to integrate...  ...experience in Application Security, AppSec engineering, Cloud Security, or Software... 
    Application

    Bloomberg Industry Group

    Arlington, VA
    1 day ago
  •  ...Application Security Engineer Braintrust is the AI observability platform. By connecting evals and observability...  ...or Rust ~ Deep knowledge of common web and API vulnerability classes and the...  ...excited to push the frontier of how AppSec gets done with them ~ Clear... 
    Application
    Flexible hours

    Brain Trust Inc

    Washington DC
    4 days ago
  •  ..., and the free world remains secure. Founded in 2024, Twenty Technologies...  ...We are seeking IT Security Engineer to join our growing...  ...across our network, systems, and applications, while working closely with...  ...systems, VPNs, and DMZs. Develop and enforce security policies... 
    Application
    Full time
    Work at office
    Flexible hours

    Twenty

    Arlington, VA
    7 days ago
  • Expression is looking for a Full Stack Developer to enhance our team in Washington, DC. This role requires proficiency in both front...  ...back-end development, offering the chance to work on innovative applications. The ideal candidate should possess strong technical skills,... 
    Application

    Expression

    Washington DC
    22 hours ago
  • Leidos is seeking a Sr. Full Stack Developer in Bethesda, Maryland. This role involves designing, developing, and maintaining cloud systems and applications as part of an innovative team. Candidates should have significant experience in Java, Python, Agile practices, and... 
    Application

    Dormont Manufacturing Company

    Bethesda, MD
    2 days ago
  • $166k - $253k

     ...months, not years. ABOUT THE JOB We're seeking a Security Software Engineer to develop novel security tooling for securing embedded Linux systems...  ...policy, please visit [ By submitting your application, you consent to Anduril Industries using a third-party... 
    Application
    Full time
    Work experience placement
    Immediate start

    Anduril Industries

    Washington DC
    16 hours ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Web Developer / Application Security (AppSec) Engineer. Be the first to apply!