Application Security Engineer

About InfiterraJoin our mission to revolutionize the subscription economy by streamlining subscription service delivery.Infiterra empowers IT distributors, Managed Service Providers (MSPs), and telecommunications companies to thrive in the subscription economy. Our cutting-edge subscription commerce platform automates and integrates subscription workflows—from quoting to billing—enhancing operational efficiency, ensuring billing accuracy, and facilitating scalable growth.As a globally recognized leader in subscription commerce, Infiterra fuses innovation, outstanding performance, and reliable expertise to assist partners in their transformation and growth journeys.About the RoleWe are seeking a dynamic Senior Application Security Engineer to incorporate security into our software design, development, and operational processes. This role is not an afterthought; it’s an integral part of our daily engineering practice. You will collaborate closely with our product and engineering teams to identify risks early, enhance secure-by-design practices, and elevate our application security standards. This is a hands-on AppSec role: engaging with code, architecture, and deeply integrated into the Software Development Life Cycle (SDLC). While Infiterra’s headquarters are in Thessaloniki, Greece, this position is completely remote.What You’ll DoIntegrate Security into the SDLCIncorporate security activities throughout all phases of the SDLC: requirements, design, implementation, testing, deployment, and maintenance.Work closely with engineering teams to ensure consistent application of secure development practices.Evaluate security controls for new features, services, and architectural modifications.Threat Modeling & Secure DesignFacilitate threat modeling sessions (e.g., STRIDE) for both new and existing systems.Identify threats, attack vectors, misconfigurations, and insecure design patterns.Collaborate with engineers to ensure adherence to secure-by-design principles.Secure Code & Architecture ReviewsConduct security-focused code reviews to detect vulnerabilities and risky implementations.Provide clear, actionable guidance on secure coding patterns and best practices....

Welcome to the positive side of technology! You might recognize us by our previous name: Znany Lekarz. It all began over a decade ago when we posed a crucial question: is anyone in healthcare genuinely considering the needs of patients? We took action, empowering patients with the ability to leave and read reviews about their healthcare experiences. Simultaneously, we equipped doctors with innovative tools to streamline booking management, enabling them to focus on what truly matters: patient care. Today, we invite you to join us in our mission to humanize the healthcare experience.Docplanner: A Global LeaderWe proudly operate in 13 countries, with over 90 million patients relying on our services every month. More than 300,000 specialists trust our platform, backed by leading venture capital firms like Point Nine Capital, Goldman Sachs Asset Management, and One Peak Partners. Despite employing over 2,500 individuals worldwide, we maintain the innovative spirit of a startup that we began with over a decade ago.Docplanner Tech: Shaping the FutureAt Docplanner Tech, we are a diverse team of over 400 professionals in Engineering, Data, and Product teams, dedicated to creating our product for all our locations. Many team members have been with us for over five years, and we always welcome new colleagues with warmth and enthusiasm.While we could share more about ourselves, we encourage you to check our Glassdoor reviews to hear firsthand experiences. If you want to understand what it's like to be your true self at work, watch this video.Why Join Us?It's fulfilling to share with family and friends how your work contributes to making the world a better place. You’ll rest easy knowing that your efforts matter and that your skills resonate with your values.Our goal is to enhance the healthcare experience, and this journey begins with you being authentically yourself. We believe that embracing the diversity of human experiences leads to a better healthcare journey for everyone. We don’t just acknowledge our differences; we celebrate them. We encourage you to bring your whole self to work, including the choice to work remotely, as we are fully remote-friendly.

Join the forefront of healthcare technology with Docplanner! You may recognize us by our previous name, Znany Lekarz. Over the past 12 years, we’ve been on a mission to revolutionize patient care in healthcare. We empower patients by providing them with tools to leave and read reviews about their medical experiences. Simultaneously, we equip healthcare professionals with technology that streamlines booking management, allowing them to focus on what they do best: caring for patients. Today, we're inviting you to be part of our journey to enhance the human aspect of healthcare.Docplanner's Global ImpactOperating in 13 countries and trusted by over 90 million patients monthly, Docplanner has become a go-to platform for more than 300,000 specialists. We are backed by reputable venture capital firms like Point Nine Capital, Goldman Sachs Asset Management, and One Peak Partners. With over 2,500 employees worldwide, we maintain the innovative spirit of a startup, even after a decade in the industry.About Docplanner TechAt Docplanner Tech, our diverse team of over 400 engineers, data analysts, and product managers is dedicated to building our products for all locations. Many of our team members have been with us for over five years, and we take pride in welcoming each new member with enthusiasm.Discover more about our workplace culture through our Glassdoor reviews or see how it feels to be your authentic self at work in this video.Why Join Us?Being part of our team means contributing to a better world, making a tangible difference. You can rest easy knowing your work aligns with your values and has a meaningful impact. We believe in embracing diversity and creating a healthcare experience that reflects the rich tapestry of human experience. With us, you can bring your whole self to work—whether that means working remotely or choosing to come into the office.

Nord Security is seeking a Senior iOS Engineer to help build applications that strengthen user security and privacy. This position is based in Krakow and centers on designing and developing iOS apps that meet high standards for performance and responsiveness. Role overview This role focuses on creating secure and reliable iOS applications. Collaboration with other engineers and team members is an important part of the work, with a shared goal of delivering features that protect users and provide a smooth experience. What you will do Design and implement iOS applications with a focus on security and privacy Work closely with teammates to deliver high-quality, responsive features Contribute to the ongoing improvement of app performance Requirements Experience developing iOS applications Strong interest in user security and privacy Ability to work effectively within a collaborative team

About Sezzle: At Sezzle, we are dedicated to empowering the next generation financially. Our innovative approach is redefining the shopping experience by combining state-of-the-art technology with flexible, interest-free installment plans, making shopping more intelligent and accessible. We are not only changing the payment landscape but are also transforming how customers discover, engage with, and acquire their favorite products, significantly boosting merchant sales through enhanced conversions and elevated order values. Join us in shaping the future of fintech and retail as we build a forward-thinking team that is passionate about creating a unique shopping experience rather than just a transaction. If you are eager to break new ground in technology and provide a transformative experience for both consumers and merchants, we invite you to be part of Sezzle's journey in revolutionizing shopping! About the Role: We are on the lookout for a highly skilled and driven Senior Software Engineer who embodies both intelligence and emotional insight. This role offers an exhilarating chance to excel in a fast-paced environment within a rapidly expanding team, with extensive opportunities for career progression.As a Senior Software Engineer at Sezzle, you will collaborate with a motivated team to solve engaging and complex challenges across various organizational domains. Your expertise will not only propel your own growth but also elevate the skills of your colleagues. In this backend-centric position, you will closely interact with stakeholders from Product, Support, and the broader business. Additionally, you will collaborate with other engineering teams to deliver high-quality, scalable, and innovative solutions that address both internal and customer challenges. Daily tasks will include designing, developing, and deploying new features, as well as mentoring and unblocking your teammates. Your contributions will have a profound impact on the daily operations of your peers at Sezzle, enhancing their capacity to support our business and customers, while also allowing for iterative feedback and improvement. Interview Process At Sezzle, we prioritize transparency. We regularly provide feedback and set expectations throughout our interview process, as we believe this is essential to our culture. Progression through each stage is not guaranteed.

About TripadvisorThe Tripadvisor Group connects individuals with experiences that deserve to be shared. Our mission is to be the world’s most reliable source for travel and experiences. Through our diverse brands, advanced technology, and capabilities, we engage a global audience with partners using rich content, travel insights, and two-sided marketplaces for experiences, accommodations, dining, and more. Tripadvisor, Inc. (Nasdaq: TRIP) encompasses a portfolio of esteemed travel brands, including Tripadvisor, Viator, and TheFork.We are on the lookout for a proactive Senior Cloud Security Engineer who will serve as the first line of defense for the Tripadvisor Experiences platform. This pivotal role merges proactive security engineering with responsive incident management. You will immerse yourself in our cloud environment, vigilantly monitoring for threats, addressing security incidents, automating defenses, and collaborating closely with our engineering teams to fortify our platform.This position is available for remote work in either Portugal or Poland.What You'll DoIncident Response Focused on Products:Monitor, analyze, and investigate security alerts from our AWS infrastructure, application logs, and security tools (WAF, SIEM, Cloud-Native tools).Lead incident responses that affect the Viator application, including potential data breaches, application-layer assaults, or infrastructure vulnerabilities.Oversee and prioritize vulnerabilities reported through our bug bounty program and other sources.Security Engineering & Automation:Develop and sustain security monitoring and alerting systems within our production environment.Automate security operations tasks using scripting languages like Python or Go to enhance our detection and response capabilities.Configure, fine-tune, and manage security tools, including our Web Application Firewall (WAF), AWS GuardDuty, and Security Hub.Vulnerability Management & Team Collaboration:Translate findings from application security tools (SAST, DAST, SCA) into actionable steps by collaborating with engineering teams to prioritize and remediate vulnerabilities in our codebase and dependencies.Conduct threat modeling for new features to identify and mitigate risks before deployment.Act as a security subject matter expert and mentor for other team members.

About Docplanner Docplanner, known in Poland as ZnanyLekarz, began 12 years ago with a simple question: is healthcare truly centered on patients? Since then, the company has built a platform where patients can share and read reviews about their healthcare experiences, while doctors benefit from tools that streamline bookings and free up more time for patient care. The mission remains clear: strengthen the human side of healthcare. Our Impact Docplanner operates in 13 countries, serving over 90 million patients each month. More than 300,000 specialists trust our products. Backing from Point Nine Capital, Goldman Sachs Asset Management, and One Peak Partners has supported our growth. With a team of over 2,500 people worldwide, Docplanner has kept its entrepreneurial drive alive for more than a decade. Inside Docplanner Tech Docplanner Tech brings together more than 400 professionals across Engineering, Data, and Product. Many team members have been with us for over five years, and we welcome new colleagues warmly. Our teams work across all locations, building and improving the product every day. Curious about our culture? See what others say on Glassdoor. For a glimpse into life at Docplanner, watch this video. Why Work With Us? At Docplanner, work has purpose. Team members know their contributions make a real difference in the world. The company’s commitment to making healthcare more human starts with a culture that values authenticity and celebrates diversity. Everyone is encouraged to bring their whole self to work. Remote work is fully supported, and the environment is designed to help people thrive as they are.

Join Turnitin as a Senior Fullstack/Backend Software Engineer, where your expertise in backend development, particularly with Java and serverless architectures, will be pivotal. We are seeking engineers who are enthusiastic about creating scalable distributed systems and delivering robust software solutions for our acclaimed educational platform.As an integral member of our shared services team, you'll spearhead the development and enhancement of the core systems supporting both our existing and upcoming applications.Key Responsibilities:Architect, develop, and optimize scalable backend services utilizing Java and serverless technologies (AWS Lambda).Design and implement RESTful APIs and event-driven architectures.Contribute to frontend component development as required.Enhance performance and cost-effectiveness of existing services.Collaborate with cross-functional teams, including Architects, Product Managers, and engineering leads, to deliver innovative solutions.Mentor junior developers and promote best practices.Establish and manage CI/CD pipelines.Maintain high-quality coding standards through peer reviews, automated testing, and compliance with development best practices.Document shared components comprehensively, providing usage guidelines and examples.

We are seeking a highly skilled Senior Cyber Security Engineer specializing in applications to join our dynamic team at Colliers International EMEA. In this role, you will be responsible for developing and implementing robust security measures to protect our applications and ensure the integrity of our systems.As a key player in our cybersecurity team, you will collaborate with cross-functional teams to identify vulnerabilities and enhance our security posture. Your expertise will drive innovative solutions that safeguard our digital assets and support our commitment to providing top-notch service to our clients.

First Connect Insurance Services operates a digital marketplace designed for independent insurance agents in Poland and beyond. The platform connects agents with over 30 leading US insurance carriers, offering a broad range of products including home, auto, and small business coverage. Technology sits at the core of First Connect’s approach. The company invests in software that brings a modern, consumer-grade experience to insurance professionals. Thousands of agents already rely on this platform, with the user base expanding rapidly. What you will work on This role centers on backend engineering for a remote team based in Poland. Work will support the ongoing development of tools and features that help agents access and manage insurance products efficiently. Who this role is for This position suits backend engineers interested in building technology for the insurance sector. The focus is on creating reliable, user-friendly systems that serve a growing community of agents.

Role Overview EcoVadis is hiring a Senior Application Security Specialist in Warsaw. This role focuses on protecting company applications and systems. The specialist will work to find vulnerabilities, put security controls in place, and partner with teams across the business to strengthen security practices. Key Responsibilities Identify and assess security vulnerabilities in applications and systems Implement measures to reduce risk and improve security Collaborate with cross-functional teams to support secure development and operations

At Veeam Software, we are committed to being the leading Data and AI Trust Company. Our focus is on empowering organizations to effectively manage, secure, and understand their data and AI capabilities, ensuring resilience and enabling safe AI scalability. As pioneers in data resilience and security posture management, we are strategically positioned at the intersection of identity, data, security, and AI risk. With our headquarters in Seattle and a presence in over 30 countries, we proudly protect more than 550,000 customers globally, earning their trust to keep their operations running seamlessly. Join us in our journey to innovate and make a significant impact for some of the world's most prominent brands.About the RoleAs a Lead Application Security Engineer (Offensive Testing), you will spearhead penetration testing and Dynamic Application Security Testing (DAST) for our Veeam Data Cloud offerings. Utilizing Burp Suite and the latest web/API testing methodologies, you will identify genuine exploitable vulnerabilities, prioritize risks, and collaborate closely with engineering teams to ensure effective remediation.Your role will also involve enhancing testing tools and methodologies to streamline processes, helping teams avert recurring vulnerabilities, particularly in areas such as authentication, authorization, session management, and tenant isolation.What You’ll DoLead offensive testing initiatives: strategize the scope, depth, and frequency of tests; generate clear, consistent reports, and develop reusable playbooks.Conduct manual penetration testing (primary focus): assess web applications and APIs, especially around authentication/authorization, multi-tenant boundaries, and critical workflows; simulate realistic attack paths by chaining vulnerabilities.Utilize Burp Suite on a daily basis: replicate and validate findings using advanced features; create and maintain repeatable scopes, macros, and authenticated flows.Enhance and execute DAST processes: perform and refine authenticated scans, minimize false positives, and collaborate with CI/platform teams to scale scanning efforts and manage credentials efficiently.Drive vulnerability remediation: produce high-quality documentation, partner with engineering teams for fixes and retesting, and assist in preventing regressions; ensure that findings are logged with appropriate severity and SLAs.Contribute to long-term security improvement: identify recurring patterns and collaborate with teams to establish prevention strategies through standards, libraries, platform controls, and contributions to threat modeling/design reviews.What You’ll BringRobust experience in web and API penetration testing, with a strong emphasis on authorization vulnerabilities (IDOR/BOLA, privilege escalation, etc.).

Join Fairmarkit as a Senior Software Engineer, where you will be instrumental in developing innovative software solutions that drive efficiency and improvement across our platform. You'll collaborate with cross-functional teams to design, develop, and implement new features, ensuring high performance and responsiveness. If you are passionate about technology and eager to tackle complex challenges, we would love to hear from you!

Role Overview Housecall Pro is seeking a Senior Staff Engineer based in Poland. This role involves guiding the direction of our software solutions and supporting the growth of our engineering team. Senior Staff Engineers at Housecall Pro help set technical vision, drive complex projects, and share knowledge across the organization. What You Will Do Lead major engineering projects from concept to delivery Mentor and support junior engineers, sharing technical expertise and feedback Work closely with peers to improve our products and processes Contribute ideas that strengthen our technology and bring value to customers Location This position is based in Poland.

Role overview fomf seeks a FullStack Engineer to help build and maintain software applications. This remote position is open to candidates based anywhere in Poland. The role covers both front-end and back-end development, with frequent collaboration alongside colleagues from various specialties. What you will do Develop and maintain applications using full stack technologies Work closely with cross-functional teams to deliver reliable software Share ideas to improve user experience and overall product quality Location Remote within Poland.

Join our innovative team at Arista Networks as an FPGA Design Engineer. In this pivotal role, you will be responsible for designing and developing cutting-edge FPGA solutions that drive our next-generation networking products. You will collaborate with a talented team of engineers to implement advanced features and functionalities, ensuring high performance and reliability.This position offers the flexibility of a remote work environment, allowing you to work from anywhere in Poland while contributing to projects that make a significant impact in the industry.

Job Overview Join Our Team We are seeking an experienced Senior Backend Engineer (Go) to join Inflect as a contractor within our Engineering team in Poland. This role offers you the opportunity to take significant technical ownership of essential backend services in a hands-on, execution-driven capacity. If you have a passion for building, scaling, and enhancing production systems that drive business success, we'd love to hear from you! This position is ideal for a senior engineer at either a senior or early staff level, showcasing strong technical ownership and a high degree of autonomy. As part of our tight-knit, senior engineering team, you will enjoy substantial ownership and autonomy, making a direct impact on our product. You will have a concrete influence over backend architecture, technical direction, and tooling decisions while maintaining alignment with product and business objectives. This position does not include people management responsibilities or legacy system ownership; it is solely focused on developing, scaling, and enhancing modern backend services. About Inflect Inflect is at the forefront of building and operating an innovative IT infrastructure marketplace, seamlessly connecting buyers and service providers through a single, product-driven platform. We are not just a software house or agency. We navigate complex marketplace workflows at the intersection of cloud infrastructure, network services, and large-scale computing (CPU/GPU). Our marketplace integrates directly with service providers, allowing buyers to discover, compare, and transact infrastructure services effortlessly. Our engineering culture prioritizes pragmatism, ownership, and rapid feedback, focusing on delivering tangible business value rather than adhering to rigid processes or excessive formalities. Work Environment Standard working hours align with the Polish (CET) time zone, with regular collaboration with engineers and stakeholders based in the United States. We prefer a hybrid work model, with 1–2 days in our Warsaw office each week. Daily communication in English with US-based engineers and partners. Close collaboration with Product, Backend, and Infrastructure-focused teammates. Your Responsibilities Assume technical ownership of critical backend services that power Inflect’s marketplace and service provider integrations. Design, implement, and scale backend systems that support the onboarding and integration of new service provider groups. Collaborate closely with Product and Engineering leadership to translate marketplace and integration requirements into practical, production-ready technical solutions. Engage in ongoing evaluation and improvement of backend systems to enhance performance and reliability.

Hello! We are Bee Talents, an IT recruitment agency dedicated to assisting clients globally in establishing their technical teams since 2015. Currently, we invite you to join the recruitment process for Reef Technologies.About Reef Technologies:We are a fully remote team of senior Python backend engineers with over 5 years of experience.Our focus is on building complex distributed systems, ensuring low latency, fault tolerance, high scalability, and self-healing capabilities. We also develop APIs, databases, and libraries, diving into custom algorithm design as needed.Over the long term, we collaborate with startups globally, working on projects that range from one-off tasks to multi-year partnerships. Highlights of our work include a financial data warehouse for a London fintech, a graph search system for Norwegian auditors, and a scalable WAF for a client in Chicago.Beyond our technical endeavors, we actively shape Reef Technologies to be a desirable workplace. We co-create company policies using Sociocracy 3.0, a framework that ensures every voice is valued and rules are collaboratively established.Our primary objective at Reef Technologies is to accomplish tasks efficiently and effectively. We offer competitive rates and significant flexibility, expecting everyone to take accountability for their work and deliver promptly. We do not tolerate unresponsiveness.To ensure the best fit, we prioritize matching team members with suitable projects. You'll have substantial input in shaping your career path within the organization.Typically, we work between 30–40 hours a week, with ample flexibility in our schedules. Our team is globally distributed, with many of us working from Poland.

About GliaGlia stands at the forefront of AI-driven customer service solutions tailored for banks and credit unions. Our innovative platform seamlessly integrates AI with human customer service representatives across all voice and digital interactions, thanks to our unique ChannelLess® Architecture. With our AI for All™ initiative, businesses can enhance efficiency without compromising customer experience by leveraging AI to automate conversations and streamline service operations.Valued at over $1 billion, Glia has earned recognition as a Deloitte Technology Fast 500™ company for five consecutive years, empowering over 700 financial institutions while boasting an impressive NPS score of 72. We are also proud to be certified as a Great Place to Work, with an astounding 98% employee satisfaction rate.Your RoleAs a Senior Software Engineer, you will become a vital member of the Media Essentials team (codename Ether). Your mission will be to develop exceptional rich media solutions that facilitate profound interactions for Glia’s clientele. You will significantly influence the successful realization of our ambitious Voice+AI roadmap.Team DynamicsThis position is designed to accommodate hybrid or remote work styles, although we highly value face-to-face interactions. For team members based in Estonia, working from the office is strongly encouraged. Additionally, we gather our engineering teams with remote members at least twice a year to foster collaboration, innovation, and relationship building. Travel for these gatherings may be required, which could also include final interview stages.Our team is distributed across Estonia (Tartu, Tallinn), Portugal, and Spain, and our processes are tailored for remote collaboration. While we are remote-first, we offer physical office locations in both Tallinn and Tartu, providing the option to work from these sites for those based in Estonia. Our operational hours align with the Eastern European time zone (EET/EEST), and we are hiring for this role in Estonia and Poland.Current Tech StackBackend: Go, Elixir, Ruby, PythonFrontend: React, JavaScript, TypeScriptInfrastructure: AWS, Kubernetes (EKS), Docker, TerraformDatabases & Persistence: PostgreSQL (RDS), DynamoDB, RedisEvent Streaming & Messaging: Apache Kafka, RabbitMQAI: Amazon Bedrock, Claude Code, Google Gemini