Senior Software Engineer – Database Optimization Specialist

About Cast AI Cast AI builds an automation platform focused on streamlining cloud-native and AI infrastructure at scale. The platform integrates autonomous decision-making into Kubernetes and cloud environments, aiming to optimize performance, reliability, and efficiency in production. Over 2,100 companies, including Akamai, BMW, Cisco, FICO, HuggingFace, NielsenIQ, Swisscom, and TGS, use Cast AI to automate away manual tickets, alerts, and adjustments, replacing them with systems that adapt infrastructure dynamically. This shift helps organizations improve efficiency and reduce costs. Our Team and Culture Headquartered in Miami, Cast AI operates in 34 countries across Europe, North America, Latin America, and APAC. The company values diversity and inclusion, drawing on a wide range of perspectives to inform its work. In January 2026, Cast AI reached unicorn status following a strategic investment from Pacific Alliance Ventures, part of the Shinsegae Group. The company’s valuation now exceeds $1 billion. Location This Senior Software Engineer role is open to candidates based in Bulgaria, Croatia, Estonia, Greece, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia, Slovenia, or Ukraine. Role Overview Senior Software Engineers at Cast AI contribute to core product features across several teams. Openings are available in the following areas: Workload Optimization: Automate resource management by dynamically adjusting allocations to lower costs and improve application reliability. Karpenter: Enhance integration between Karpenter and Cast AI, adding enterprise features to the open-source Kubernetes autoscaler and supporting large-scale deployments. Reporting: Build scalable solutions for data reporting and analysis, improving user experience and insights. Join Cast AI to help shape the future of autonomous infrastructure.

About Cast AI Cast AI builds an automation platform that combines artificial intelligence with Kubernetes infrastructure. The goal: improve performance, reliability, and efficiency in production environments by embedding autonomous decision-making into cloud systems. Manual management of Kubernetes and AI environments becomes less effective at scale. Cast AI addresses this by providing continuous automation that adapts infrastructure as conditions change. This approach helps reduce manual work, cuts costs, and boosts operational efficiency. More than 2,100 companies rely on Cast AI, including Akamai, BMW, Cisco, FICO, HuggingFace, NielsenIQ, Swisscom, and TGS. Global Team and Culture Headquartered in Miami, Cast AI operates across 34 countries, including Europe, North America, Latin America, and APAC. The team values diverse perspectives and intentionally builds a global workforce. Recent Milestone In January 2026, Cast AI reached unicorn status after a strategic investment from Pacific Alliance Ventures, part of the Shinsegae Group (a conglomerate valued at over $50 billion). The company’s valuation now exceeds $1 billion. Location Requirements This Senior Software Engineer - Infrastructure role is open to residents of Bulgaria, Croatia, Estonia, Greece, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia, Slovenia, and Ukraine.

Join CyberArk as a Senior Software Engineer specializing in Secure AI Agents, where you will play a crucial role in developing innovative solutions that enhance security protocols. You will collaborate with a talented team of engineers and work on cutting-edge technology aimed at protecting critical business infrastructures.

About UsAt Redis, we are pioneers in creating the infrastructure that powers some of the world's fastest applications. Whether you're checking the weather, making a payment, or tracking your flight status online, our technology plays a crucial role. Join us in building a faster world with simpler, more efficient experiences.Our core mission is to accelerate the transition to AI-native systems globally. We are committed to delivering high-performance services that enhance developer and agent workflows, making them faster, more efficient, and easier to scale.As a Senior Engineer on our AI Services team, you will design and implement impactful memory and context capabilities for next-generation chatbots and AI agents. You will take ownership of architecture, implementation, and production deployment while ensuring high standards for quality, performance, and operability. Additionally, you will mentor emerging talent through code reviews and technical guidance, and collaborate closely with the AI Research team to align on roadmap and technical direction.This position offers a fantastic opportunity to spearhead innovation and expand the capabilities of the Redis platform in the burgeoning Agentic AI era.

Jobgether is looking for a Senior Software Engineer in Bulgaria to help build AI-powered SaaS products. This role centers on designing, implementing, and maintaining software applications that use artificial intelligence to improve user experiences and support business goals. Role overview This position involves close collaboration with teams across the company. The Senior Software Engineer will work with others to define project requirements, create technical specifications, and deliver reliable, high-quality code. What you will do Design and develop software applications that incorporate AI features Maintain and enhance existing systems to meet evolving needs Work with cross-functional groups to gather requirements and clarify technical details Contribute technical expertise to expand the company’s portfolio of AI-driven products Requirements Experience as a software engineer, with a focus on designing and building applications Ability to collaborate with diverse teams and translate requirements into technical solutions Strong commitment to delivering high-quality, maintainable code

About UsWelcome to Redis! We are the creators of the technology that powers the fast applications that drive our modern world. Whether you checked the weather, made a purchase online, or tracked your flight today, our contributions are at work. At Redis, you will engage with cutting-edge technology that is reshaping the digital landscape, enhancing experiences for over 10,000 customers globally. Join us in our mission to create a faster, simpler world.This is a distinctive chance to influence Redis capabilities as we transition into the era of Artificial Intelligence.You will be part of the core Redis Search/Vector team, tackling some of AI’s most pressing challenges, including advanced indexing, vector and hybrid retrieval, and latency-sensitive solutions on a global scale. Your work will directly impact millions of developers by transitioning features from research to production, optimizing latency and recall while managing costs effectively.

About UsAt Redis, we engineer the technology that powers the fast applications that shape the modern world. If you've checked the weather, processed a payment, or tracked your flight online today, our technology has likely played a role. Join us in crafting a simpler and faster world with innovative solutions for over 10,000 global customers.Why You’ll Love Working HereWe are on a mission to accelerate the transition to AI-native systems. Our focus is on providing high-performance, developer-friendly services that enhance the speed and simplicity Redis is renowned for, making AI workflows more efficient and scalable.As a vital member of the Redis AI Services team, you'll play a crucial role in developing advanced memory and context functionalities essential for chatbots and AI agents. This is an incredible opportunity to drive innovation and enhance the Redis platform to meet the evolving demands of the AI era.Your ResponsibilitiesDesign and implement AI-driven features, prioritizing scalability, reliability, and performance.Foster innovation by exploring cutting-edge AI technologies and frameworks, contributing to Redis’ advancements in the AI domain.Collaborate closely with cross-functional teams, including engineering, support, and DevOps, to lead the development of the fastest NoSQL databases globally.

Ocadogroup is hiring a Senior Software Engineer in Sofia, Bulgaria. This position focuses on designing, developing, and implementing software solutions that support the company’s business goals. Role overview The Senior Software Engineer will work closely with colleagues from different teams to build and deliver products that align with customer needs. The role involves hands-on development and active participation in the full software lifecycle, from concept to deployment. What you will do Create and refine software designs to address business challenges Develop, test, and implement new features and applications Collaborate with cross-functional teams to ensure product quality Requirements Experience designing and building software solutions Ability to work collaboratively with colleagues from various disciplines Strong interest in technology and delivering results that make a difference

About the Role Entain is looking for a Senior Software Engineer with deep experience in Angular to help build and improve software that shapes our user experience. This position is based in Sofia. What You Will Do Develop and maintain Angular applications that support our products and services Work closely with engineers and designers to solve technical challenges Contribute to decisions that improve code quality and user experience Help deliver reliable, high-quality software in a collaborative environment Who We’re Looking For Strong background in Angular and front-end development Experience working on complex software projects Comfortable collaborating with cross-functional teams Motivated to make a real impact on products and users

Join CyberArk, a leading provider of identity security solutions, as a Staff Software Engineer specializing in Secure AI agents. In this pivotal role, you will leverage your expertise to develop cutting-edge AI-driven security solutions that safeguard enterprises against emerging threats. You will work collaboratively within an innovative team, contributing to the design and implementation of secure software applications that enhance our product offerings.

Role Overview Lifted An Upwork Company is hiring a Senior Web Software Engineer in Sofia. This position focuses on building and maintaining web applications that meet high standards for quality and user experience. The role involves hands-on design, implementation, and ongoing support of web projects. What You Will Do Design and develop web applications from concept through deployment Implement features that improve usability and performance Maintain and update existing web solutions as requirements evolve Collaborate closely with team members to deliver reliable results What We Look For Strong experience with web development technologies Commitment to writing clean, maintainable code Ability to work well with others and share knowledge Focus on delivering a smooth, effective user experience

Role overview Jobgether is seeking an AI Automation Engineer for a partner organization in Bulgaria. The main goal of this position is to develop intelligent systems that streamline business operations and reduce manual tasks. What you will do Design and build automation workflows using large language models (LLMs), APIs, and current integration platforms Create scalable solutions that link different tools and platforms into unified, data-driven processes Collaborate with sales, marketing, and customer success teams to boost productivity and efficiency Explore new AI technologies to address complex business problems Who thrives in this role Engineers who enjoy combining technical problem-solving with practical business needs Individuals who like working across teams and disciplines People who are comfortable with evolving technology and global projects Location This position is based in Bulgaria.

LucidLink develops cloud-based solutions that allow teams to access data securely from anywhere. The platform is built for handling large files and extensive data sets, offering a user experience similar to a local hard drive. Founded by storage industry veterans in 2016, LucidLink enables real-time collaboration for creative organizations, including major names in media and entertainment. The company operates from San Francisco and maintains an engineering office in Sofia, Bulgaria, serving customers in over 40 countries. Role overview The Senior Fullstack Software Engineer position is based in LucidLink’s Sofia office. This role centers on building and improving the platform that supports instant, secure data access and real-time collaboration. The work directly affects how teams worldwide manage and share large-scale content. What you will do Work on technical challenges that shape global collaboration, especially in media and entertainment. Contribute to a platform designed for performance, security, and ease of use with massive data sets. Collaborate with a team of over 230 professionals, where individual input quickly influences product direction. What we value Integrity, innovation, and empathy in daily work and team interactions. Commitment to personal growth and learning as the company expands. Supportive culture that encourages advancement and open communication. Benefits Flexible paid time off Competitive salary Stock options Health coverage

At SumUp, we recognize that small businesses are the driving force behind Europe's economy. Our mission has always centered around empowering these businesses to flourish. We are now embarking on an exciting new venture: a stablecoin designed to ensure payments are instant, cost-effective, and fully compliant with regulations.This is a unique opportunity to contribute to a product that sits at the convergence of fintech, cryptocurrency, and regulatory compliance, supported by a profitable organization that serves over 4 million merchants across 35+ markets.What’s the opportunity?We are seeking a Senior Backend Engineer who is passionate about building innovative solutions from the ground up. This role is ideal for someone who thrives in fast-paced environments and desires to enhance their technical skills in a high-impact field. You will collaborate closely with our Staff Engineer and cross-functional teams to bring our stablecoin project to fruition.This newly created position is pivotal for a high-priority project. It entails a dynamic, complex environment filled with learning opportunities, perfect for an individual who enjoys tackling challenging problems and delivering high-quality code.Your responsibilities will include:Building from the ground up: Participate in technical discovery and MVP development for SURO, coding daily in Kotlin or Go.Designing reliable systems: Assist in creating high-SLA, service-oriented systems that integrate with our ledger, reconciliation, and treasury platforms.Delivering quality: Write clean, maintainable code with a focus on reliability, security, and observability.Collaborating across teams: Work alongside Product, Finance, Legal, and Banking teams to ensure features comply with regulatory standards.Expanding your skills: Learn from seasoned engineers and deepen your expertise in payments, compliance, and blockchain technologies.Owning features end-to-end: Take full responsibility for specific components from design through deployment and monitoring.

About UsWelcome to Redis! We are the driving force behind the high-performance applications that power everyday experiences. Whether you're checking the weather, making online purchases, or tracking flight statuses, our technology is at work. At Redis, you will engage with cutting-edge technology that’s both fast and easy to use, as we strive to create a simpler and faster world for our over 10,000 clients globally. Are you ready to make an impact?Your RoleAs a Software Engineering Team Lead for Redis AI Services, you will take on a pivotal leadership role, guiding a team of skilled engineers to develop highly scalable, reliable, and production-ready services. Your leadership will be instrumental in promoting software excellence and engineering best practices, as you harness your expertise to enhance Redis’ functionalities—especially in memory and context capabilities for chatbots and agents, as part of our expanding AI Services suite. This role requires a blend of software engineering leadership, strategic decision-making, and execution of impactful product initiatives.Key ResponsibilitiesLead and Develop a High-Performing Engineering Team. Mentor team members to produce top-tier software quickly, underpinned by strong engineering principles, pragmatic design, and flexible testing methodologies.Facilitate Agile Execution and Decision-Making. Cultivate a culture of rapid iterations and data-driven decisions to effectively balance immediate product delivery needs with long-term strategic goals.Enhance the AI Services Platform. Collaborate with diverse teams, including AI research, product management, and cloud infrastructure, to advance Redis’ AI solutions into robust, customer-ready offerings.Operational Leadership. Establish and track SLAs, SLOs, and KPIs. Build strong observability, incident management, and release processes to ensure high service uptime and performance.Recruit and Cultivate Talent. Attract top engineering talent and nurture a culture of technical curiosity, operational excellence, and continuous improvement.What We’re Looking For6+ years of experience as a software engineer specializing in backend, cloud, or distributed systems, with a minimum of 2 years in a technical leadership role.Demonstrated success in leading product-focused engineering teams to deliver high-quality outcomes.

About UsAt Redis, we are the creators of the fastest applications that power the digital world. Whether you’ve checked the weather, made a purchase, or tracked your flight status today, our technology is behind it. Join us in transforming the future with rapid and seamless experiences. Are you ready to be part of this journey?Why You Will Love Working HereAs the Software Engineering Team Lead within our AI and Search department, you will play a pivotal role in guiding the direction of Redis' AI and Search innovations. Lead a passionate team that drives Redis' Search capabilities, including real-time full-text search, vector similarity, and cutting-edge retrieval mechanisms.This role is integral to our next-generation data platform, where performance, scalability, and creativity converge.Your ResponsibilitiesLead a high-performing engineering team while engaging hands-on in the design and implementation processes.Provide technical guidance in systems-level development using C, C++, and Rust.Enhance Redis’ AI and Search functionalities, focusing on vector search, hybrid retrieval, and semantic caching.Design, oversee, and continuously improve CI/CD workflows to ensure rapid and quality releases.Manage incident responses and customer interactions for production issues, ensuring quick resolutions and implementing process improvements.Collaborate effectively with Core, Cloud, Product, and Support teams.Establish engineering standards focused on performance, reliability, testing, and operational excellence.Recruit, mentor, and nurture engineers, promoting a culture of ownership and ongoing development.

About UsAt Redis, we are the architects of the technology powering the fast applications that drive our modern world. Whether you checked the weather, made a purchase, or tracked your flight online today, our solutions are behind those seamless experiences. Join us at Redis to work with cutting-edge technology, whether you're developing, marketing, or selling to our extensive global customer base of over 10,000.Why You’ll Love This RoleThis is an exciting opportunity to be at the forefront of enhancing Redis’s search and vector capabilities for the AI-driven future. As part of the Redis Search/Vector team, you will engage with real-world production systems that provide semantic, vector, and hybrid search functionalities to millions of developers around the globe.You will collaborate with seasoned engineers and technical leads, contributing to features from inception to production, while expanding your knowledge in high-performance search, vector retrieval, and latency-sensitive systems.Your Responsibilities:Develop and optimize core vector and information-retrieval components (such as HNSW, quantization, filtering, and re-ranking) under expert guidance.Enhance performance-critical pathways, focusing on reducing latency, maximizing throughput, and improving resource efficiency.Aid in addressing real-world challenges at scale, with an emphasis on correctness, reliability, and maintainability.Engage in design discussions and code reviews within the Search/Vector team.Work alongside Redis Core, Cloud, and Support teams on feature development and troubleshooting.Learn and implement systems-level optimizations (such as memory layout, concurrency, SIMD) with mentorship.What You’ll Need:Demonstrated production experience (typically 3–5+ years) in backend, systems, or infrastructure software development.Experience in either search/IR/vector systems or systems programming (storage, performance-critical services).Proficient in C/C++ or Rust, with a strong background in writing concurrent and efficient code.Excellent problem-solving abilities and the capacity to decompose tasks and designs with assistance.Bachelor’s degree in Computer Science or equivalent practical experience.Bonus Points For:Experience with distributed systems, cloud computing, or other related technologies.

Join our dynamic team at CyberArk as a Senior Software Engineer specializing in Python. In this role, you will be instrumental in designing and developing cutting-edge software solutions that secure the world's most sensitive data.We are looking for a passionate engineer who thrives in a collaborative environment and is eager to tackle complex challenges. Your expertise will help drive innovation and enhance our product offerings.

Join CyberArk Software Inc. as a Senior Software Engineer specializing in Workload Identity. In this pivotal role, you will be responsible for designing and implementing robust software solutions that enhance the security and efficiency of workload identity management. Collaborate with a talented team of engineers, contribute to innovative projects, and drive the development of cutting-edge technology.