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Web Application Security Jobs in Missouri (NOW HIRING)

Jobgether

Web2 security experience in areas such as penetration testing, web application security, infrastructure security, or application security is an advantage. * Knowledge of formal verification ...

Dellfor Technologies

senior .net developer

Missouri City, MO

$51.50 - $65.50/hr

Understanding of Web Application Security testing (OWASP Qualifications We are looking for a Senior .Net developer with minimum 8 years of industry experience in the following: Experience with large ...

CACI

Full Stack Web Developer

Saint Louis, MO · On-site

CACI is seeking a Full Stack Web Developer to create custom enterprise web application solutions to support the National Security Mission. The candidate will have extensive knowledge of system ...

Jimmy Jazz

Web Services Manager

Springfield, MO · On-site

Strong understanding of API development, web services architecture, software development methodologies, and application security best practices. * Proven ability to manage priorities, allocate ...

CACI

Junior Application Developer

Saint Louis, MO · On-site

$53K - $106K/yr

Junior Application Developer Job Category: Information Technology Time Type: Full time Minimum ... Contribute to modern web-based software that directly supports national security missions. Gain ...

CACI

Application Developer - Mid

Saint Louis, MO · On-site

$63K - $129K/yr

... web application frameworks and development practices. Working knowledge of relational databases and data modeling. Familiarity with Git-based workflows and Agile development practices. Security ...

Workiva

$40/hr

Ability to analyze problems and devise creative solutions within business constraints; good understanding of and common web application vulnerabilities * If Security Operations focused: Self ...

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Showing results 21-40

All JobsWeb Application Security JobsWeb Application Security Jobs in Missouri

Web Application Security information

See Missouri salary details

$35.7K

$97.7K

$151K

How much do web application security jobs pay per year?

As of Sep 12, 2026, the average yearly pay for web application security in Missouri is $97,735.00, according to ZipRecruiter salary data. Most workers in this role earn between $76,900.00 and $117,100.00 per year, depending on experience, location, and employer.

What is the difference between Web Application Security vs Web Developer?

AspectWeb Application SecurityWeb Developer
Primary FocusProtecting web applications from security threats and vulnerabilitiesDesigning, coding, and maintaining websites and web applications
Required SkillsSecurity protocols, vulnerability assessment, penetration testingProgramming languages, UI/UX design, front-end/back-end development
CertificationsCertified Ethical Hacker, CSSLP, OSCPCertified Web Developer, Microsoft Certified, JavaScript certifications
Work EnvironmentSecurity teams, IT departments, cybersecurity firmsWeb development agencies, tech companies, freelance

Web Application Security and Web Developer roles overlap in the tech industry but focus on different aspects. Web Application Security specialists concentrate on safeguarding applications from threats, while Web Developers build and maintain the applications themselves. Both roles require technical skills, but their core responsibilities differ significantly, making them complementary in the web development lifecycle.

Is web application security in demand?

Web application security professionals are in high demand due to the increasing frequency and sophistication of cyberattacks targeting online platforms. Organizations seek experts skilled in vulnerability assessment, secure coding, and security tools like firewalls and penetration testing to protect their digital assets, making this a growing and stable career field.

What is web application security?

Web application security involves protecting web applications from threats and vulnerabilities that could lead to data breaches or unauthorized access. It includes implementing security measures such as input validation, authentication, and regular testing with tools like vulnerability scanners. Professionals in this field often work to identify and fix security flaws to ensure safe and reliable online services.
Infographic showing various Web Application Security job openings in Missouri as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $97,735 per year, or $47 per hour.

Blockchain Security Researcher

On-site, Remote

Jobgether
See more jobs at Jobgetherexternal

Full-time

Medical, PTO

Posted 8 days ago

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Blockchain Security Researcher based in Netherlands.

Join a security-focused research team protecting some of the most important protocols and financial systems in the blockchain ecosystem.
You will investigate smart contracts, identify vulnerabilities, and help clients strengthen their systems before and after launch.
The role spans the full protocol lifecycle, from architecture and design reviews to deep audits and ongoing security coverage.
You will work extensively with Solidity, Ethereum, and the EVM while exploring emerging attack vectors and novel blockchain technologies.
AI will be a central part of your workflow, helping you expand audit coverage, analyze complex systems, and develop more efficient security processes.
You will also have opportunities to conduct independent research, develop security tooling, and contribute knowledge to the broader ecosystem.
This is an opportunity to combine practical security engineering, blockchain research, and collaborative problem-solving in a highly technical environment.

Accountabilities:
  • Review smart contracts for decentralized applications, blockchain infrastructure, and financial institutions, identifying vulnerabilities, assessing their severity, and clearly presenting findings to clients.
  • Lead security audits independently from planning through final delivery, using AI as a primary collaborator and partnering with other researchers when additional attack perspectives are valuable.
  • Participate in protocol design reviews, analyzing architecture, trust assumptions, security models, and operational constraints before implementation begins.
  • Collaborate directly with protocol engineering teams on co-creative engagements involving research, mechanism design, specification, and smart contract development.
  • Design and develop smart contracts as part of research and client engagements, applying strong security and engineering principles throughout the development lifecycle.
  • Integrate AI effectively into audit workflows and develop reusable skills, agents, prompts, scripts, and processes that improve team productivity and security coverage.
  • Conduct open-ended research into emerging blockchain technologies, vulnerability classes, attack vectors, and novel security mechanisms.
  • Document research findings and contribute insights to internal security knowledge bases and the broader blockchain security ecosystem.
  • Work closely with clients and fellow researchers to communicate technical risks, security recommendations, and complex findings clearly and effectively.

Requirements:

  • Hands-on practical experience in one or more relevant areas, including software development, cybersecurity, applied mathematics, distributed systems, cryptography, cryptoeconomics, game theory, or DeFi mechanisms.
  • Proven experience designing and developing smart contracts, in addition to auditing or reviewing them.
  • Strong working knowledge of Solidity and the Ethereum/EVM ecosystem, including common libraries, frameworks, and smart contract design patterns.
  • Extensive experience using modern AI tooling as part of daily technical work to expand audit coverage, reason through complex systems, and accelerate high-quality security analysis.
  • Ability to critically evaluate AI-generated code and outputs rather than relying on them without technical validation.
  • Experience building and extending personal or team tooling, including AI skills, agents, prompts, scripts, or complete security workflows.
  • Advanced English proficiency with strong written and verbal communication skills.
  • Experience with non-EVM ecosystems or blockchain technologies such as Canton, Move, Cosmos SDK/Golang, Cairo, Rust-based blockchains, or zero-knowledge circuits is a plus.
  • Experience with crypto risk assessment, smart contract risk analysis, or threat modeling is highly desirable.
  • Web2 security experience in areas such as penetration testing, web application security, infrastructure security, or application security is an advantage.
  • Knowledge of formal verification, invariant testing, or advanced fuzzing tools such as Echidna, Foundry, Halmos, or Certora is beneficial.
  • Experience participating in audit contests or bug bounty platforms, including Code4rena, Sherlock, Cantina, Immunefi, or HackerOne, is a plus.
  • A track record of publicly sharing security research through published findings, technical articles, conference presentations, or open-source security tooling is advantageous.

Benefits:

  • Fully remote work environment with flexibility across locations.
  • Opportunities to meet teammates through company gatherings around the world.
  • Flexible time off to support sustainable work and personal needs.
  • 8 weeks of paid leave for primary caregivers.
  • 4 weeks of paid leave for secondary caregivers.
  • One-time $3,600 baby bonus.
  • Up to $500 in equipment support to build an ideal home office.
  • Medical insurance coverage.
  • Learning and development opportunities to support continued professional growth.
  • Monthly stipend for a preferred co-working space.
How Jobgether works:
We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.
We appreciate your interest and wish you the best!
 Why Apply Through Jobgether? 
 
Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.
 
 
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We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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