13 application security engineer jobs in Sofia

Join the best bank to work for in Bulgaria* Who we are: Do you want to join a well-established bank with a start-up culture? No, we’re not joking! We, at tbi, have been one of the most profitable banks for years and we are growing at a fast pace. We’re a bank with a long history of success that operates as a start-up, always on the lookout for new opportunities to grow our business. How do we do that? It’s all about our people - brave , passionate and caring people who don’t just want to follow the same path, but to transform tbi into a mobile-first, state-of-the-art lifestyle ecosystem. Our colleagues love working here - 70% of them would recommend tbi as an employer to their friends and family. Do you want to play a key role in our unique success story? We are looking for a strong, hands-on DevSecOps / Application Security Engineer to join our Information Security team. In this role you will embed security across the software...

We’re looking for a Full-Stack Engineer to help enhance our Cloud Cost Control (CCC) platform by building end-to-end backend and frontend solutions and delivering new features at scale. You’ll develop RESTful APIs and data integrations (e.g., PostgreSQL/Databricks), strengthen performance and security, and drive reliable delivery through CI/CD, Infrastructure as Code, and production observability.   Key Responsibilities: Design, build, and support full stack solutions for backend and frontend applications Develop and maintain RESTful APIs, ensuring seamless integration with databases like PostgreSQL and Databricks Enhance the Cloud Cost Control (CCC) platform for modularity, scalability, and feature improvements Improve application performance, security, reliability, and automate deployments through DevOps practices Manage CI/CD pipelines, define Infrastructure as Code, and set up monitoring and observability for production systems...

We are a leading trading platform that is ambitiously expanding to the four corners of the globe. Our top-rated products have won prestigious industry awards for their cutting-edge technology and seamless client experience. We deliver only the best, so we are always in search of the best people to join our ever-growing talented team. Our Engineering team plays a pivotal role in ensuring the robustness, speed, and security of our Product. Dedicated to enhancing performance, providing a best-in-class user experience, ensuring compliance, and safeguarding data, the team’s efforts directly impact our ability to offer clients a seamless and secure trading journey. We are seeking a skilled Frontend Software Engineer whose ambitions match ours: to skyrocket technical skills to architect-level mastery. At capital.com, you’ll have the unique opportunity to grow your technological understanding and expertise, focusing on areas that make us industry leaders: performance, launch time...

Our mission is to enable everyone to build wealth We reinvent how trading and investing work by creating exceptional products people love. Fostering a culture of excellence and high velocity is the key to our success. Today, we serve over 5 million clients, with more than €30 billion in assets under management - a testament to the scale and trust we’ve built in just a few years. What You’ll Do Design and deploy dynamically scalable, self-healing infrastructure and applications in public and private cloud environments. Striving to constantly improve and automate the infrastructure design in order to achieve better resilience and scalability. Use IaaS automation tools like Terraform, AWS CloudFormation and Ansible. Migrate environments from on-premise infrastructure to AWS/GCP environments. Evaluate application and infrastructure KPIs and proactively mitigate bottlenecks and possible issues. Design zero-downtime infrastructures. Continuous performance improvement and...

Our mission is to enable everyone to build wealth We reinvent how trading and investing work by creating exceptional products people love. Fostering a culture of excellence and high velocity is the key to our success. Over the past few years, our client base has grown 20 times to over 6 million, and client assets have grown over 50 times to over €40 billion. What You'll Do Design and deploy dynamically scalable, self-healing infrastructure and applications in public and private cloud environments. Use IaaS automation tools like Terraform, AWS CloudFormation and Ansible. Migrate environments from on-premise infrastructure to AWS/GCP environments. Handling operational and security alerts and incidents. Improving infrastructure, application and security monitoring systems. Continuous performance improvement and troubleshooting of critical components. Learn from your colleagues and share your knowledge with them. We have to grow as the company grows, and mutual, honest...

emerchantpay is a leading global payment service provider and acquirer for online, mobile, in-store and over the phone payments. Our global payments solution is available through a simple integration, offering a diverse range of features, including global acquiring, global and local payment methods, advanced fraud management and performance optimisation. We empower businesses to design seamless and engaging payment experiences for their consumers. We are looking for a Senior AI Engineer to join our AI Engineering team and help design, build, and roll out production-grade AI solutions, with a strong focus on AI engineering, AI agents, agentic workflows, machine learning, GenAI, and LLM-based applications . This is a senior individual contributor role within the AI Engineering team. The Senior AI Engineer will work closely with the AI Tech Lead , engineering teams, product stakeholders, data teams, cloud/platform teams, and security teams to deliver reliable AI capabilities...

We’re looking for a Full-Stack Engineer to help enhance our Cloud Cost Control (CCC) platform by building end-to-end backend and frontend solutions and delivering new features at scale. You’ll develop RESTful APIs and data integrations (e.g., PostgreSQL/Databricks), strengthen performance and security, and drive reliable delivery through CI/CD, Infrastructure as Code, and production observability.   Key Responsibilities: Design, build, and support full stack solutions for backend and frontend applications Develop and maintain RESTful APIs, ensuring seamless integration with databases like PostgreSQL and Databricks Enhance the Cloud Cost Control (CCC) platform for modularity, scalability, and feature improvements Improve application performance, security, reliability, and automate deployments through DevOps practices Manage CI/CD pipelines, define Infrastructure as Code, and set up monitoring and observability for production systems...

Our mission is to enable everyone to build wealth We reinvent how trading and investing work by creating exceptional products people love. Fostering a culture of excellence and high velocity is the key to our success. Today, we serve over 5 million clients, with more than €30 billion in assets under management - a testament to the scale and trust we’ve built in just a few years. What You’ll Do Design and deploy dynamically scalable, self-healing infrastructure and applications in public and private cloud environments. Striving to constantly improve and automate the infrastructure design in order to achieve better resilience and scalability. Use IaaS automation tools like Terraform, AWS CloudFormation and Ansible. Migrate environments from on-premise infrastructure to AWS/GCP environments. Evaluate application and infrastructure KPIs and proactively mitigate bottlenecks and possible issues. Design zero-downtime infrastructures. Continuous performance improvement and...

We are a leading trading platform that is ambitiously expanding to the four corners of the globe. Our top-rated products have won prestigious industry awards for their cutting-edge technology and seamless client experience. We deliver only the best, so we are always in search of the best people to join our ever-growing talented team. Our Engineering team plays a pivotal role in ensuring the robustness, speed, and security of our Product. Dedicated to enhancing performance, providing a best-in-class user experience, ensuring compliance, and safeguarding data, the team’s efforts directly impact our ability to offer clients a seamless and secure trading journey. We are seeking a skilled Frontend Software Engineer whose ambitions match ours: to skyrocket technical skills to architect-level mastery. At capital.com, you’ll have the unique opportunity to grow your technological understanding and expertise, focusing on areas that make us industry leaders: performance, launch...

emerchantpay is a leading global payment service provider and acquirer for online, mobile, in-store and over the phone payments. Our global payments solution is available through a simple integration, offering a diverse range of features, including global acquiring, global and local payment methods, advanced fraud management and performance optimisation. We empower businesses to design seamless and engaging payment experiences for their consumers. We are looking for a Senior AI Engineer to join our AI Engineering team and help design, build, and roll out production-grade AI solutions, with a strong focus on AI engineering, AI agents, agentic workflows, machine learning, GenAI, and LLM-based applications . This is a senior individual contributor role within the AI Engineering team. The Senior AI Engineer will work closely with the AI Tech Lead , engineering teams, product stakeholders, data teams, cloud/platform teams, and security teams to deliver reliable AI capabilities...

We are looking for an experienced Senior Software Engineer - Python / AI Engineer to join the Internal Development Team. In this role, you will design, develop, and maintain internal tools, APIs, AI-driven automation workflows, and system integrations that improve operational efficiency across Capital.com. The role is strongly focused on building practical AI solutions, including AI agents, agent workflows, automated decision-support flows, and integrations with internal and external systems. You will collaborate closely with Engineering, Security, Operations, Compliance, Finance, and other business teams to deliver secure, reliable high-quality software that supports internal workflows, data integration, and emerging AI-driven initiatives. Key Responsibilities: Develop and maintain internal services, tools, APIs, automation scripts, and AI-enabled workflows Design and implement AI agents, multi-step agent flows, and automation pipelines to support internal business...

SumUp helps businesses get paid effortlessly, process orders fast, sell online instantly, and manage money smarter. We build the tools that let merchants thrive and deliver outstanding customer experiences. But we don’t just simplify transactions — we’re reshaping the future of fintech. Sofia has been the heart of SumUp’s payments platform since day one. For over a decade, our Payments Tribe — made up of cross-functional, autonomous squads — has powered secure, scalable payment processing for card-present and card-not-present (CNP) transactions in 36+ markets, helping millions of merchants grow, get paid, and thrive. We’re looking for an Engineering Manager to lead and grow a team of talented engineers within our Payments domain, which is SumUp’s foundational product, underpinning everything else we do. You’ll collaborate closely with Product and Business partners to scale the backend systems behind SumUp’s global payments engine - securely processing millions of transactions...

We are a leading trading platform that is expanding to the four corners of the globe. Our top-rated products have won prestigious industry awards for their cutting-edge technology and seamless client experience. We deliver only the best, so we are always in search of the best people to join our ever-growing talent team. We are currently growing our Backend Team and looking for great Engineers with an interest in trading to join us! Our Engineering team plays a pivotal role in ensuring the robustness, speed, and security of our product. Dedicated to enhancing performance, providing a best-in-class user experience, ensuring compliance, and safeguarding data, the team's efforts directly impact our ability to offer clients a seamless and secure trading journey. We believe great engineering talent not only delivers excellent code, but also lives our values. We are looking for someone who is eager to go fast , willing to innovate and grow , who knows how to listen, respect and...