Senior Application Security Engineer - St. Louis POST NUMBER: 446112
(Please Note: No form of employment accommodations or sponsorship are being considered)
Position Overview
The Senior Application Security Engineer will possess a developer’s mindset and a drive to shape and scale a growing AppSec program. You’ll play a lead role in securing modern web and cloud applications by embedding yourself as a trusted advisor across a large agile development team. This is a high-impact position for someone who can proactively lead initiatives, evaluate potential tools and strategies, and deliver pragmatic security solutions in collaboration with stakeholders and development teams.
Responsibilities:
- Responsible for application security testing across the SDLC using tools like SAST, SCA, and DAST (e.g., Checkmarx).
- Work closely with developers to triage, prioritize, and remediate vulnerabilities; especially in C#, Angular, and Python applications.
- Lead tool evaluations, PoCs, and drive adoption of new security technologies and automation strategies.
- Conduct threat modeling, architecture reviews, and support secure design patterns.
- Author and evolve secure coding standards, AppSec playbooks, and automation scripts (Python preferred).
- Advise and partner with Engineering, Product, and Security leadership to influence AppSec roadmap and strategy.
- Mentor junior engineers and support a collaborative, embedded security model.
Experience:
- Excellent communicator with the ability to collaborate with both technical and business stakeholders.
- 6 years of combined experience in software development and application security.
- Strong hands-on AppSec experience.
- Experience with secure CI/CD integration.
- Background as a former developer (.NET preferred) who understands real-world coding tradeoffs.
- Deep familiarity with tools like Checkmarx, Black Duck, or similar SAST/SCA platforms.
- Ability to lead and execute independently in a fast-paced, collaborative environment.
- Knowledge of AWS, mobile security, or red team/pen testing is a plus.
- Strong scripting/automation skills (Python preferred).
- Mobile AppSec experience a plus.
- Cloud security (AWS) desired.
- Red teaming or penetration testing exposure a plus.
- Certifications: CISSP, CSSLP, GIAC and preferred.
Additional Details:
- Employment Type: Perm / Direct-Hire
- Start Date: Immediate
- Location: Onsite / Downtown St. Louis
- Target Compensation: $150k - $160k based on skills and experience
- Engagement Status: No form of sponsorship or employment arrangements are being considered at this time.
Interested Candidates are Encouraged to Apply for Immediate Consideration!
Determining compensation for this role (and others) at Vaco/Highspring depends upon a wide array of factors including but not limited to the individual’s skill sets, experience and training, licensure and certifications, office location and other geographic considerations, as well as other business and organizational needs. With that said, as required by local law in geographies that require salary range disclosure, Vaco/Highspring notes the salary range for the role is noted in this job posting. The individual may also be eligible for discretionary bonuses, and can participate in medical, dental, and vision benefits as well as the company’s 401(k) retirement plan.
Vaco by Highspring values a diverse workplace and strongly encourages women, people of color, LGBTQ+ individuals, people with disabilities, members of ethnic minorities, foreign-born residents, and veterans to apply.
EEO Notice
Vaco by Highspring is an Equal Opportunity Employer and does not discriminate against any employee or applicant for employment because of race (including but not limited to traits historically associated with race such as hair texture and hair style), color, sex (includes pregnancy or related conditions), religion or creed, national origin, citizenship, age, disability, status as a veteran, union membership, ethnicity, gender, gender identity, gender expression, sexual orientation, marital status, political affiliation, or any other protected characteristics as required by federal, state or local law.
Vaco by Highspring and its parents, affiliates, and subsidiaries are committed to the full inclusion of all qualified individuals. As part of this commitment, Vaco by Highspring and its parents, affiliates, and subsidiaries will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact HR@vaco.com .
Vaco by Highspring also wants all applicants to know their rights that workplace discrimination is illegal.
By submitting to this position, you agree that you will be giving Vaco by Highspring the exclusive right to present your as a candidate for the foregoing employment opportunity. You further agree that you have represented information about yourself accurately and have not affirmatively misrepresented your qualifications. You also agree to maintain as confidential, to the fullest extent permitted by law, any information you learn from Vaco by Highspring about the position and you will limit disclosure of information about the position only to the extent necessary to perform any obligations in furtherance of your application. In exchange, Vaco by Highspring agrees to exercise reasonable efforts to represent you through all solicitation, job screening and resume dispersal.
Privacy Notice
Vaco by Highspring and its parents, affiliates, and subsidiaries (“we,” “our,” or “Vaco by Highspring”) respects your privacy and are committed to providing transparent notice of our policies.
- California residents may access Vaco by Highspring HR Notice at Collection for California Applicants and Employees here.
- Virginia residents may access our state specific policies here.
- Residents of all other states may access our policies here.
- Canadian residents may access our policies in English here and in French here.
- Residents of countries governed by GDPR may access our policies here.
Pay Transparency Notice
Determining compensation for this role (and others) at Vaco by Highspring depends upon a wide array of factors including but not limited to:
- the individual’s skill sets, experience and training;
- licensure and certification requirements;
- office location and other geographic considerations;
- other business and organizational needs.
With that said, as required by local law, Vaco by Highspring believes that the following salary range referenced above reasonably estimates the base compensation for an individual hired into this position in geographies that require salary range disclosure. The individual may also be eligible for discretionary bonuses.