Senior Software Engineer – Database Optimization Specialist

Why Choose Cast AI?At Cast AI, we are revolutionizing the cloud-native and AI infrastructure landscape through our cutting-edge automation platform. By integrating autonomous decision-making into Kubernetes and cloud environments, we ensure continuous optimization of performance, reliability, and efficiency in production settings.The traditional methods of operation are becoming obsolete. With the increasing complexity of Kubernetes and AI environments, relying on manual decisions is no longer viable. Cast AI transforms the process by replacing tickets, alerts, and manual tuning with seamless automation that adjusts infrastructure dynamically as conditions evolve, resulting in natural cost savings and enhanced efficiency.Join over 2,100 leading companies that trust Cast AI, including Akamai, BMW, Cisco, FICO, HuggingFace, NielsenIQ, Swisscom, and TGS.A Global Team with Diverse PerspectivesHeadquartered in Miami, we are committed to a global and intentional approach to diversity. Currently, Cast AI operates in 34 countries across Europe, North America, Latin America, and APAC, bringing a wealth of perspectives into our operations and leadership.Unicorn MomentumHaving achieved unicorn status in January 2026 thanks to a strategic investment from Pacific Alliance Ventures, the corporate venture arm of Shinsegae Group (a $50+ billion Korean conglomerate), our valuation exceeds $1 billion. This is just the beginning of our exciting journey.Join us in shaping the future of autonomous infrastructure!About the RoleOptimizing databases is a challenging task—PostgreSQL alone has over 350 configuration parameters, making it difficult for even seasoned engineers to identify optimal settings. Have you envisioned a database that self-optimizes continuously in the background, allowing you to concentrate on developing outstanding products?At times, query performance may degrade unexpectedly. Envision a system that can proactively identify performance issues, analyze root causes, and automatically refine your queries and indexes, generating pull requests with the precise optimizations required.Cast AI is in search of a talented Senior Software Engineer with a passion for databases and a desire to delve into the underlying technologies that drive them. Your understanding of implementation specifics around transactions, wire protocols, WAL, indexes, query planning, and other core database functionalities will empower you to create a product that automates traditionally intricate and manual processes.

About Man GroupMan Group is a leading global alternative investment management firm dedicated to achieving superior performance for our sophisticated clients through our Systematic, Discretionary, and Solutions offerings. Leveraging our talented team and advanced technology, we provide both single and multi-manager investment strategies that are deeply researched and encompass public and private markets across all major asset classes, with a particular emphasis on alternatives. Our partnership approach allows us to build strong connections with clients, tailoring our solutions to meet their investment objectives and those of the millions of retirees and savers they serve.Headquartered in London, we manage $227.6 billion* and have a global presence with multiple offices. Man Group plc is publicly traded on the London Stock Exchange under the ticker EMG.LN and is part of the FTSE 250 Index. For more information, visit www.man.com.* As of December 31, 2025The TeamWe are thrilled to offer an opportunity for a Senior Database Platform Engineer to join our dynamic team of skilled Engineers and DBAs responsible for managing our Oracle, PostgreSQL, MongoDB, and SQL Server database estate.The team handles the daily support and administration of these databases, including engineering and all related projects. This role requires close collaboration with other Infrastructure teams, developers, and end users to ensure optimal database functionality.Additionally, this position provides the chance to work with cutting-edge technologies such as Docker and Kubernetes, alongside exposure to DevOps practices for automation, real-time monitoring, and metrics collection utilizing the latest open-source tools like Grafana and InfluxDB.

Join SumUp as a Senior Database DevOps Engineer in Sofia, where you will be instrumental in developing and maintaining our Cloud Platform infrastructure, specifically tailored for database management that supports our development teams. Your role is crucial in ensuring the availability, performance, and security of our databases through automation and enhanced infrastructure code quality. We seek a seasoned expert eager to safely shift database ownership "left" by implementing standardized automation and comprehensive guardrails. In collaboration with our Platform Infrastructure and Development teams, you will strive to lower costs, enhance self-service tooling, and actively engage in audits related to our database infrastructure. About the Team The DBOps team is part of SumUp's Platform tribe, responsible for the database infrastructure that supports payment and financial products for over 4 million businesses globally. Currently, the team is undergoing a significant transformation, migrating more than 80 legacy databases to Aurora PostgreSQL, establishing robust guardrails, and transitioning database ownership closer to the development teams that rely on it daily. Your contributions will be pivotal in this transition, bringing platform engineering discipline, automation-focused thinking, and database proficiency to a role where the impact resonates throughout the entire engineering organization.

Your impactful role. As a Senior Database Administrator, you will...Oversee the daily operations of Playtech's global database platform, from initial setup to advanced tool development.Manage high-volume databases within a complex ecosystem with numerous interdependencies.Strategically plan and implement database administration tasks to ensure peak stability and availability.Install and upgrade databases along with high-availability solutions.Create automation, monitoring, and other tools to streamline processes.Join an on-call rotation to address database-related production incidents promptly.

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

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

Company Overview:Apex is a dynamic and rapidly growing agency dedicated to Conversion Rate Optimization (CRO). Our mission is to elevate client sales without the need for increased advertising expenditure. We partner with leading e-commerce brands to refine their online platforms, leveraging data and well-established strategies for sustainable growth.Our impressive track record of delivering exceptional results is complemented by our technical expertise and commitment to enhancing user experience. As we expand our operations, we offer exciting opportunities to collaborate with a skilled team, tackling challenges and employing advanced CRO techniques.If you're passionate about making a tangible impact and helping e-commerce businesses thrive, and you're eager to work alongside a team of motivated professionals, we invite you to consider joining the Apex team.Role OverviewThe Conversion Rate Optimization Specialist will play a pivotal role in enhancing the performance of our clients' websites through the implementation of data-driven strategies designed to maximize conversion rates.This role involves analyzing user behavior, pinpointing optimization opportunities, and executing changes that enhance overall site performance. You will work closely with copywriters, designers, web developers, and other team members.Key responsibilities will include developing tailored CRO strategies for our clients, conducting comprehensive website audits to uncover optimization opportunities, performing A/B and multivariate testing to validate hypotheses, and collaborating with internal teams to implement, monitor, and further refine the results of optimization efforts.Mission Statement:The primary mission of our Conversion Rate Optimization Specialist is to drive quantifiable enhancements in our clients' e-commerce website performance by executing customized CRO strategies. This will involve direct optimization of brand websites, utilizing data-driven insights to improve user experiences, maximize conversion rates, and facilitate genuine business growth for our clients.Main Responsibilities:The responsibilities of the Conversion Rate Optimization Specialist encompass, but are not limited to:Developing and executing customized, data-informed backend CRO strategies to improve website performance and conversion rates for our agency’s clients.Conducting thorough audits of client websites to identify areas for optimization.Performing detailed analysis of user behavior using analytical CRO tools, user feedback, heatmaps, and session recordings to identify trends and optimization opportunities.Designing, executing, and managing A/B and multivariate tests to assess hypotheses and measure the impact of implemented CRO changes.Optimizing landing and product pages, checkout processes, and overall website architecture for brands.Maintaining close collaboration with copywriters, designers, and developers to ensure best practices are followed.

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.

Role Overview weekday-1 is seeking a Paid Advertising Specialist & Applied Mathematics Expert to join a remote team based in Bulgaria. This position centers on maximizing ROI through data-driven performance marketing strategies for our client. Salary Range: Rs 800,000 - Rs 2,600,000 (INR 8-26 LPA) What You Will Do Develop and execute paid advertising strategies across multiple platforms to drive measurable growth Use applied mathematics and analytics to optimize campaign performance and funnel efficiency Translate data insights into actionable marketing tactics, focusing on experimentation and automation Design and refine high-converting funnels based on ongoing analysis Continuously test, measure, and adjust campaigns using advanced tracking tools and A/B testing frameworks What Sets This Role Apart Combines creative campaign design with technical, mathematical analysis Involves hands-on work with analytics platforms and performance measurement tools Suited for those who thrive in environments where quick pivots and ongoing optimization are the norm Requirements Strong background in paid advertising and applied mathematics Experience with campaign management, analytics platforms, and tracking tools Comfort with A/B testing and data-driven decision making Ability to balance creative thinking with technical execution Remote work from Bulgaria

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.

Join our dynamic team at CyberArk as a Senior Software Engineer specializing in Secrets Hub. In this role, you will be at the forefront of developing innovative software solutions that enhance security and manage sensitive information effectively. Your expertise will contribute to designing, implementing, and maintaining robust applications that support our clients' security needs.

Join our dynamic team at Bosch Group as a Senior Software Engineer specializing in AUTOSAR for the automotive sector. In this pivotal role, you will contribute to innovative projects that shape the future of mobility. Collaborate with cross-functional teams to design, develop, and implement cutting-edge software solutions that enhance vehicle performance and safety.

Jobgether is seeking a Senior DevOps Software Engineer with a focus on Azure to join the team in Bulgaria. This position centers on improving development workflows and supporting reliable application deployment through strong DevOps practices and cloud expertise. Role overview This role involves working closely with other engineers to streamline processes and maintain efficient, secure deployment pipelines. The Senior DevOps Software Engineer will contribute technical insight to help solve complex problems and support ongoing improvements in the development lifecycle. What you will do Enhance and maintain Azure-based infrastructure for application deployment Collaborate with team members to refine DevOps practices Identify and address technical challenges in deployment and automation Requirements Extensive experience with DevOps methodologies Strong knowledge of Azure cloud technologies Ability to work effectively in a collaborative setting Proactive approach to problem-solving

Mirantis seeks a Senior Software Engineer in Sofia with deep experience in Golang. This role centers on building and maintaining scalable software that meets client needs and supports business efficiency. Key responsibilities Design, develop, and support software solutions using Golang Collaborate with colleagues from various disciplines to deliver dependable, high-quality products Contribute to projects aimed at improving processes and serving client requirements What helps people thrive here Strong problem-solving skills and a drive to tackle complex technical challenges A commitment to writing clean, maintainable code Effective collaboration and communication with cross-functional teams

About UsAt Redis, we are at the forefront of technology, powering the applications that millions rely on every day. Our innovative solutions streamline processes and enhance user experiences across various industries. If you've ever checked the weather, made an online payment, or tracked your flight status, you've touched our technology. Join us in our mission to create a faster, simpler world.We are seeking a talented and experienced Senior Software Engineer with a passion for polyglot programming, particularly in Go. You'll play a pivotal role in advancing the Redis ecosystem by enhancing the developer experience through collaboration with open source communities and contributing to our widely used client libraries.Why You'll Love This RoleIf you thrive in a collaborative environment and have a passion for open source, this is the perfect opportunity for you. We believe that APIs should be intuitive and delightful to work with, and you’ll have the chance to drive that vision forward. Your strong engineering mindset will help transform innovative ideas into reality as you work across multiple programming paradigms.Your ResponsibilitiesContribute to the development of key client libraries like go-redis, redis-py, predis, and node-redis.Engage with open source communities to foster collaboration and innovation.Promote best practices to ensure an exceptional developer experience.Assist in adding support for new Redis features in client libraries.Act as a technical lead on cross-language initiatives.Work closely with external contributors, library users, product managers, and fellow engineers to drive projects forward.QualificationsStrong team collaboration skills.Proficiency in multiple programming languages and paradigms.Experience with open source projects and community engagement.A passion for creating intuitive and enjoyable APIs.

About UsAt Redis, we are the creators of the innovative technology that powers the fast applications vital to everyday life. Every time you check the weather, make a payment, or track your flight status, our solutions are working behind the scenes to enhance your experience. Join us in our mission to build a faster, more seamless world with cutting-edge technology.As a Senior DevOps Engineer, you will play a critical role in our cloud team, overseeing the development and deployment processes of the world’s fastest NoSQL database, managing numerous clusters across major public and private cloud infrastructures.You will be tasked with developing essential features for our SaaS platform and ensuring a robust infrastructure that meets our customer needs.We are looking for a self-driven individual who thrives in a collaborative environment with diverse teams. You should be comfortable working remotely across different time zones and have a passion for utilizing open-source tools and automation to enhance productivity.If you are eager to leverage your software skills with the latest technologies and tools, we invite you to take on this exciting challenge!

We are seeking a talented and motivated Senior Frontend Software Engineer to join our dynamic team at CyberArk. In this role, you will have the opportunity to lead the design and development of innovative user interfaces that enhance the user experience of our products.Your expertise will contribute to the overall success of our software solutions, ensuring they are intuitive, responsive, and visually appealing. If you are passionate about frontend technologies and eager to work in a collaborative environment, we would love to hear from you!