Senior Application Security Engineer at Turnkey | Remote

Join Our TeamAt Turnkey, we are revolutionizing the way developers manage private key infrastructure, crafting secure, developer-first solutions that empower wallet creation, transaction signing, and automated on-chain actions—all through a streamlined API that safeguards sensitive key information.Our ambition is to fortify the open internet by establishing …

At GuidePoint Security, we are dedicated to delivering top-tier cybersecurity expertise, solutions, and services that empower organizations to make informed decisions while minimizing risks. Our comprehensive three-tiered approach to evaluating security postures and ecosystems enables leading organizations, including Fortune 500 companies and U.S. government entities, to effectively identify threats, optimize resources, and implement tailored solutions to mitigate risks.Role OverviewAs a Senior Application Security Consultant within our Strategic Services team, you will provide a wide range of strategic Application Security services, including Application Threat Modeling, Application Architecture Reviews, and AppSec/DevSecOps Program Assessments. This role offers an excellent opportunity to engage with clients across diverse industries and contribute significantly to enhancing their security postures.Joining our elite team, you will be responsible for conducting engagements, maintaining effective communication with clients, delivering detailed reports, and providing actionable remediation guidance. Additionally, you'll play a vital role in refining our service offerings in alignment with emerging threats and evolving client needs.We are particularly interested in candidates who have transitioned from software development into the realm of application security, possessing hands-on coding experience and a comprehensive understanding of secure software development practices.

As a Senior Security Engineer, you will play a pivotal role in fortifying our technical landscape by architecting, implementing, and automating comprehensive security measures throughout our application stack and cloud environments, with a primary focus on AWS and considerations for GCP.Your expertise will enhance our security framework by actively identifying and addressing vulnerabilities, developing sophisticated security solutions throughout the Software Development Life Cycle (SDLC), and creating scalable automation using languages and tools such as Python, Go, Terraform, and Tines. Your contributions will be essential in preventing unauthorized access and exfiltration of Protected Health Information (PHI), enabling our transition towards a proactive defense strategy.This fully remote position reports to the Senior Manager of Security Engineering and is crucial to advancing our organization's security maturity and overall resilience.

The Canonical Security Operations team is on the lookout for a dynamic Senior or Staff Engineer to join our ranks. As a pivotal member of our team, you will play a crucial role in designing, building, and operating a state-of-the-art Security Operations Center (SOC). Your leadership, mentorship, and technical expertise will guide our efforts to maintain the highest security standards.This multifaceted role encompasses:Core SOC responsibilities, including security monitoring, threat hunting, and incident response.Security engineering focused on evaluating and fortifying Canonical's platforms and products.Software engineering to create tailored tools and platforms.Site Reliability Engineering (SRE) to deploy, maintain, and automate security solutions.We seek candidates with robust engineering and security backgrounds, complemented by a track record of significant achievements. Whether you are a seasoned security operations professional with engineering expertise or a senior developer with a strong security focus, you will find this role rewarding.In addition to safeguarding Canonical’s digital assets, this position offers a unique opportunity to engage with the open-source community. Team members will have the chance to present at industry conferences, share threat intelligence, and contribute to open-source security software.We also have openings for junior positions for candidates with a strong academic or professional foundation.

We are excited to announce multiple openings for Senior and Staff Security Operations Engineers (SOC) as we establish a dedicated team reporting directly to our Chief Information Security Officer (CISO). We seek candidates with a diverse range of expertise. At the senior level, we are looking for individuals with extensive experience defending critical assets and high-value cyber targets against sophisticated threats from advanced persistent threats and state-sponsored actors. For more junior roles, we welcome exceptional candidates with a demonstrated passion for cybersecurity, engagement in cyber defense, and notable academic and professional achievements, even if their experience is limited.Our mission is to enhance the security and reliability of the open-source supply chain. While we monitor our own infrastructure, our broader objective is to strengthen the overall security of the global Ubuntu ecosystem through the efforts of this team.The Security Operations (SecOps) team is pivotal in designing, implementing, and evolving Canonical's security practices, techniques, tools, systems, and policies. This team leads strategies that dictate how Canonical secures its data, internal infrastructure, and build processes, ensuring the integrity and security of our infrastructure and product deployments. They are responsible for developing and implementing technical security controls that automatically detect, contain, and remediate security threats. Additionally, the team will contribute to Canonical's product security, reinforcing the resilience of all Ubuntu customers and users against cyber threats.The SecOps team is committed not only to securing Canonical but also to enhancing the security of the broader open-source community. They will have opportunities to share knowledge through public presentations, participate in industry events, and engage in threat intelligence sharing within the community.

Are you ready to embark on a challenging journey? Join us for an exhilarating mission with uncertain outcomes but immense honor and recognition upon success. At Nansen, we are pioneers in on-chain investing, inspired by the legendary explorer Fridtjof Nansen, who ventured into uncharted territories of the Arctic. Together with our community, we're navigating the blockchain landscape, and we need a skilled Senior Security Engineer to ensure our safe passage. Nansen is redefining the world of cryptocurrency investments, offering cutting-edge solutions in agentic trading, staking infrastructure, and AI-driven analytics. As we scale rapidly, security is paramount — it must be integrated from the ground up by someone with proven expertise. Our mission: Uncover the signal and empower our users to succeed. Your Role at Nansen As the Senior Security Engineer, you will play a vital role in enabling us to innovate swiftly while safeguarding our critical assets. Your responsibilities will include embedding security practices across all aspects of our operations, including cloud infrastructure, applications, CI/CD pipelines, AI solutions, and staking operations. Conduct thorough security assessments of systems, architectures, and code to identify vulnerabilities proactively. Collaborate with engineering teams to provide guidance on secure design principles, acting as a partner rather than a roadblock. Deploy and maintain essential security infrastructure, including SIEM, vulnerability scanning, endpoint protection, and logging systems. Ensure the security of our CI/CD pipelines and deployment processes from end to end. Manage secrets, key management, and access controls with the utmost diligence. Address security challenges related to AI, including API key management and prompt injection prevention. Coordinate penetration testing and security audits with external partners. Establish and uphold secure coding guidelines and code review practices that engineers adhere to. Represent the Security Team during incident response scenarios. Drive compliance initiatives for SOC 2 and ISO 27001 in a practical and efficient manner. What We Seek in You Proven experience in building and fortifying security in production environments; you understand the distinction between theoretical policies and effective security systems. In-depth knowledge of cloud security (AWS, GCP, or equivalent) and foundational principles of container and network security. Hands-on experience in implementing security tools, not just assessing them. Expertise in secrets and key management. Familiarity with compliance frameworks and best practices.

Join Binance, the pioneering global blockchain ecosystem that powers the world’s largest cryptocurrency exchange by trading volume and user base. Trusted by over 300 million individuals across 100+ countries, we are renowned for our top-tier security measures, transparency in user funds, rapid trading engine capabilities, profound liquidity, and an unmatched array of digital asset products. From trading and finance to education, research, payments, institutional services, and Web3 innovations, our offerings are designed to leverage the power of digital assets and blockchain technology, fostering an inclusive financial ecosystem that enhances financial freedom and accessibility for people worldwide.We are seeking a dynamic SOC Security Development Engineer to become an integral part of our Security Operations team. This position emphasizes the development of security platforms, automation, and the seamless integration of internal tools, while also playing a key role in incident response and SOC on-call operations.The ideal candidate will possess robust programming skills, a comprehensive understanding of SOC workflows, and hands-on experience with integrating and enhancing security platforms such as SIEM, EDR, and cloud-based security solutions through APIs and bespoke development efforts.

Join Binance, the world’s leading blockchain ecosystem, as a Security Engineer focused on fortifying our cloud infrastructure, CI/CD pipelines, and production systems. In this pivotal technical role, you will enhance our security posture, prioritize preventative measures, and implement secure-by-default platforms. Collaborating closely with our Platform, DevOps, and Engineering teams, you will design and operate security tools across cloud environments, Kubernetes, and CI/CD pipelines, with a strong emphasis on developing production-grade security software using Python.

Join Binance, the leading global blockchain ecosystem and the world’s largest cryptocurrency exchange by trading volume. With a user base exceeding 300 million across 100+ countries, we are dedicated to providing industry-leading security, transparency in user funds, rapid trading engine performance, and a comprehensive suite of digital asset products. Our diverse offerings encompass trading, finance, education, research, payments, institutional services, Web3 features, and beyond. We harness the potential of blockchain technology and digital assets to create an inclusive financial system that enhances monetary freedom and broadens financial access for individuals worldwide.This is an exceptional opportunity to make a significant impact in the blockchain community. As a Smart Contract Security Engineer, you will collaborate closely with a talented team at Binance, working at the forefront of cryptocurrency innovation. Your role will involve safeguarding the security of various projects and systems while engaging with cross-functional teams to deepen your understanding of the crypto landscape.

Join Offchain Labs as a Blockchain Security Engineer and play a pivotal role in revolutionizing decentralized applications. We are at the forefront of blockchain scalability and security, addressing real-world challenges while upholding the principles of decentralization, security, and transparency. As part of our innovative team, you will engage with ambitious thinkers and problem-solvers dedicated to creating a more equitable digital future. If you thrive in dynamic environments and are passionate about the potential of decentralized systems, we want to hear from you!

Join Canonical as an Ubuntu Security Engineer and be part of a dynamic team dedicated to securing open source software. This role involves monitoring and addressing vulnerabilities in the Ubuntu ecosystem, collaborating with internal teams and external partners to enhance security features, and contributing to the overall safety of the community. You will engage with talented professionals in technology, participate in industry events, and make a meaningful impact on global security initiatives. International travel is required twice a year for strategic alignment.

About UsAt Turnkey, we develop secure, developer-centric infrastructure for private key management, simplifying the process of creating wallets, signing transactions, and automating on-chain actions through a single, elegant API—without ever compromising sensitive key material.Our mission is to fortify the open internet by making strong cryptography and key management the standard. Founded by the team behind Coinbase Custody, the world’s largest and most secure cryptocurrency custodian, our work has safeguarded over $100 billion in crypto assets across the industry.Our team embodies a culture of low ego, high agency, and autonomy, bringing over 100 years of combined expertise in cryptography, security, and low-level systems, building robust infrastructure designed for scalability.Role OverviewWe are on the lookout for a Senior Corporate Security Engineer to spearhead and enhance the security of Turnkey's corporate infrastructure. This is a pivotal role as you will be our first dedicated corporate security hire, collaborating directly with the security lead to establish enterprise security capabilities from the ground up.In this capacity, you will safeguard Turnkey’s personnel, endpoints, SaaS applications, identity systems, and internal infrastructure, ensuring the security of our distributed workforce while enabling rapid progress without compromising safety. Operating at the intersection of security engineering, IT operations, and risk management, you will design and implement security controls that are robust yet user-friendly, ensuring our company remains secure as we grow.What You’ll DoBuild & Secure Corporate InfrastructureArchitect, implement, and oversee security measures for endpoints and distributed systems; deploy and manage our security stack (MDM, EDR/XDR, ZTNA, SSO); enforce zero-trust principles, least-privilege access, and hardening standards.Drive Security Initiatives & Risk ReductionLead initiatives focused on endpoint hardening, access controls, and vendor risk; conduct security design reviews, risk assessments, and vulnerability remediation; develop and enforce security policies and best practices.Detection, Response & AutomationRespond to security incidents with urgency and technical expertise; collaborate on detection rules, alerts, and monitoring; automate workflows and create runbooks and playbooks to efficiently scale security operations.

At Assured, we are revolutionizing the insurance landscape by modernizing claims processing—a critical yet often neglected aspect of the industry. This process, traditionally reliant on manual efforts like phone calls and faxes, incurs significant costs annually. We're here to change that.We empower major insurance providers with cutting-edge software solutions essential for thriving in today’s technology-driven environment. From self-service claim-filing systems to advanced backend fraud detection, we serve as the backbone for claims processing for some of the world’s largest insurance companies.Our team faces a variety of complex challenges—from crafting digital experiences that offer comfort and clarity to claimants during their most vulnerable moments, to orchestrating large-scale machine learning-driven decision-making for billions in claims payments. Life at Assured is dynamic, collaborative, and incredibly fulfilling.We invite you to join us as a Senior Cloud Security Engineer, where you will play a crucial role in securing and enhancing the cloud infrastructure that underpins our operations. You will be responsible for designing robust architectures, driving automation initiatives, and advocating for security-by-design principles throughout our platform. Your contributions will directly protect our data, build customer trust, and bolster our compliance efforts as we expand.Key Responsibilities Architect, implement, and scale secure AWS environments with a focus on innovation and regulatory compliance. Develop and maintain Terraform modules and infrastructure-as-code pipelines to support secure, auditable deployments. Conduct regular security assessments, execute vulnerability tests, and lead incident response initiatives. Partner with engineering and DevOps teams to seamlessly integrate security controls into CI/CD processes and product development lifecycles. Establish IAM strategies, enforce network segmentation, apply encryption standards, and implement continuous monitoring practices. Identify anomalies, investigate alerts, and respond proactively to evolving threats within our cloud environments.‍ Mentor peers on secure design principles, share insights on emerging risks, and promote best practices in cloud security. Stay ahead of emerging threats and security tools while contributing to our long-term security strategy with creativity and vision.Qualifications Extensive experience in cloud security engineering, particularly within AWS environments. Proficiency in Terraform and infrastructure-as-code methodologies. Strong foundation in security best practices, risk assessment, and compliance frameworks. Proven track record of implementing security controls and leading incident response efforts. Excellent collaboration skills with the ability to engage cross-functionally. Continuous learner with a passion for staying updated on the latest in security technologies and threats.

As a Senior Cloud Security Engineer at Included Health, you will play an essential role in fortifying our cloud environments by engineering, implementing, and automating comprehensive security controls, primarily within AWS, with considerations for GCP. This hands-on position is vital for enhancing our cloud security framework, safeguarding our product infrastructure, and actively contributing to the prevention of unauthorized PHI exfiltration. You will be responsible for designing and developing sophisticated security solutions, utilizing programming languages such as Python and Go, as well as automation tools like Terraform, to tackle critical challenges related to access control, development environment security, and infrastructure hardening. The ideal candidate will possess profound technical expertise in cloud security, exceptional software development skills for crafting security tools and automation, and a proactive mindset toward risk mitigation. You will collaborate closely with our infrastructure software and engineering teams, fostering a culture of security-by-design while implementing solutions that minimize HIPAA incidents. This remote role reports directly to the Chief Information Security Officer.

OppFi is a pioneering tech-enabled digital finance platform that collaborates with banks to offer financial products and services tailored for everyday Americans. Our commitment to transparency and responsibility enables us to support consumers who are often overlooked by traditional finance options, helping them to achieve better financial health.We are a team of compassionate, innovative, and inclusive individuals who thrive on embracing diverse talents, expertise, perspectives, and backgrounds. Our employees tackle every new challenge with a unique vision to see what can be achieved rather than merely accepting the status quo. Guided by our business principles, we foster an open and collaborative culture where continuous improvement is the norm, and the best ideas always prevail! We invite individuals who are eager to impact the financial system by facilitating access to credit, enhancing financial inclusion, promoting fiscal wellness, and delivering outstanding customer service.Fun facts: OppFi is consistently rated as one of the top consumer financial platforms online, boasting a 4.5/5.0-star rating on Trustpilot. We are proud to be recognized as a 2025 Crain’s Fast 50™ company and featured on Built In's 2025 Best Places to Work in Chicago.About the role:We are seeking a Manager of Enterprise Application Engineering to join our dynamic OppFi Technology team. This pivotal role will report directly to the Senior Director of Platform and Operations and will lead a talented team of engineers dedicated to advancing OppFi’s technological initiatives.Your Responsibilities:As the Manager of Enterprise Application Engineering, you will lead a skilled team of engineers, serving as their technical mentor and professional guide. Your objective is to be the trusted technology partner that revolutionizes business operations by creating a secure, scalable, and automated environment that empowers our workforce, safeguards our data, and propels our business forward.Team Leadership & MentorshipLead, mentor, and cultivate a world-class team of Enterprise Application Engineers.Oversee hiring, onboarding, performance management, and the career development of your direct reports.Act as the "player-coach" and foremost technical expert for your team, adept at unblocking your engineers, leading complex architectural reviews, and resolving challenging issues.Encourage a culture of accountability, collaboration, and perpetual improvement.

At Garner, we are on a mission to revolutionize the healthcare landscape, ensuring high-quality and affordable care for everyone.We are fundamentally rethinking how healthcare operates in the U.S. by collaborating with employers to reshape healthcare benefits through clear incentives and powerful, data-driven insights. Our innovative approach leads employees to superior, cost-effective care, creating a system that benefits all parties involved. Patients experience improved health outcomes, employers utilize healthcare funds more efficiently, and physicians are rewarded for providing outstanding care instead of simply increasing procedure counts.Garner is among the fastest-growing healthcare technology firms in the nation. Our products are trusted by some of the most sophisticated employers and providers in the industry, and we are assembling a team of talented, mission-driven individuals who are eager to make a significant impact on healthcare at scale.About the Role:We are in search of an outstanding Senior Security Engineer to join our Security Engineering team. In this pivotal role, you will be instrumental in safeguarding our most valuable asset: patient data. The Security Engineering team at Garner is tasked with securing cloud infrastructure, implementing secure code guardrails, and fostering trust with our clients. This position involves a variety of projects that span multiple security domains.Where You Will Work:This position is open to remote candidates across the U.S. For those located in New York City, a hybrid schedule will apply, requiring in-office attendance on Tuesday, Wednesday, and Thursday each week.What You Will Do:Lead technical initiatives to secure networks, systems, applications, and databases.Participate in our Security Engineering on-call rotation to address security incidents.Integrate security into the build pipeline through automated SAST/DAST testing and policy enforcement.Manage vulnerability assessments and coordinate remediation efforts.Educate engineers and promote a culture of security within the engineering organization.

At Assured, we're on a transformative journey to revolutionize the insurance industry by modernizing claims processing. This often-overlooked aspect of insurance, characterized by outdated manual methods, costs the industry billions annually. We know there’s a better way. As a leading provider of software solutions for large insurers, we equip them with innovative tools ranging from user-friendly claim-filing software to advanced backend fraud detection systems. Our platform is the driving force behind claims processing for some of the world’s largest insurers. The challenges we tackle are multifaceted, from crafting digital experiences that provide reassurance to claimants in their times of need to implementing sophisticated machine learning-driven decision-making processes affecting billions in claims. Life at Assured is dynamic, collaborative, and fulfilling. We invite you to join us in redefining the future of developer experience at Assured. We are seeking a **Senior Application Platform Engineer** who is enthusiastic about creating scalable, secure, and sophisticated systems that empower teams to operate swiftly and confidently.

About LiatrioLiatrio is a dynamic consulting firm focused on transforming software delivery through collaboration and innovation. We strive to enhance enterprise delivery by developing cutting-edge DevOps platforms and coaching engineering and business teams throughout the process. Our partnerships span a variety of industries, from finance to healthcare. Join us to make a significant impact in fostering change across people, processes, culture, and technology!Who You AreAt Liatrio, we value team members who embody the following attributes:- Eagerness to learn and grow- Commitment to open communication and transparency- Strong collaborative spirit and willingness to share responsibilities- Skillful in navigating challenging conversations- Passion for solving complex interpersonal, technical, and business challenges- Capacity to acknowledge areas for improvement and propose solutions- Empathetic towards colleagues and clients- Enthusiastic about mentoring and fostering growth in others- Ability to thrive in ambiguous and rapidly changing environmentsWhat You Will DoWe are seeking a proactive technical leader with a passion for application development, modernizing legacy systems, cloud-native architecture, and DevOps technologies. Your goal will be to assist organizations and engineering teams in enhancing the quality and speed of their software delivery.You will bring a wealth of experience in several of the following areas, but not necessarily all. We value diverse skills and experiences that might not be listed here.Client Delivery Responsibilities- Lead technical delivery within a project or workstream under the direction of an account leader or architect- Ensure technical excellence for the assigned project or workstream- Mentor and uplift engineering teams, enhancing their capabilities and fostering a culture of continuous improvement

Join Canonical as a Linux Cryptography and Security Engineer, where you will leverage your software engineering and cryptography expertise to fortify the security framework that empowers Ubuntu and its users to operate securely, ensuring compliance with global information security standards such as FIPS 140-3 and Common Criteria. In this dynamic role, you will apply your knowledge of cryptography, Linux security, and programming to enhance the Ubuntu distribution while collaborating with esteemed organizations like DISA and CIS to establish and implement robust security hardening benchmarks.As a vital member of the Security Hardening team, you will develop automation tools to audit deployed systems for DISA-STIG and CIS benchmark compliance. Your insights will help identify gaps in our frameworks, allowing you to create innovative solutions to address these challenges. This position offers the chance to influence our security culture, facilitate technical delivery, and guide team direction and execution. You will work closely with Canonical’s kernel team and the broader engineering organization to drive impactful features for all Ubuntu users.

About LiatrioAt Liatrio, we are a dynamic consultancy focused on transforming software delivery and innovating processes. Our mission is to accelerate world-class delivery for enterprises by creating state-of-the-art DevOps platforms and providing comprehensive coaching to engineering and business teams throughout their journey. We collaborate with clients across various sectors, including finance and healthcare, to foster holistic change across people, processes, culture, and technology. Join us in making a significant impact as part of our small yet powerful team!Who You AreYou embody qualities that resonate with our values at Liatrio. Our team members typically exhibit a blend of the following attributes:- A strong desire and eagerness to learn- Commitment to open communication and transparency- A collaborative spirit and a willingness to share responsibilities across both internal and client projects- Proficient in navigating challenging conversations- A passion for resolving complex issues—be they interpersonal, technical, or business-related- Recognizing one's own limitations and proactively offering solutions- Demonstrating empathy towards colleagues and clients alike- Valuing mentorship and supporting others' growth- Thriving in ambiguous and rapidly changing environmentsWhat You’ll DoWe are seeking full-stack engineers who are enthusiastic about application development, modernizing legacy systems, adopting cloud-native architectures, and utilizing DevOps technologies. Your role will be pivotal in enabling organizations and engineering teams to enhance their delivery speed and quality.While you will bring extensive experience in many of the areas outlined below, we welcome diverse skills and experiences that may not be explicitly listed.