Senior Backend/Infrastructure Engineer at Perplexity | Belgrade

About Unlimit Unlimit is a leading global fintech powerhouse, renowned for operating the largest proprietary payments infrastructure in the world.Established in 2009, Unlimit has expanded its reach across 17 international offices and employs over 700 experts. We integrate more than 1,000 payment methods into a unified platform, empowering businesses to scale across borders. Our comprehensive suite of financial tools encompasses payment processing, alternative payment solutions, multicurrency business accounts, card issuing, banking-as-a-service, and crypto on- and off-ramps.Our mission is to dismantle financial barriers, enabling seamless money movement globally. We equip innovative businesses with the resources to accept, send, and manage payments effortlessly, regardless of their location.About the RoleWe are in search of a proactive and experienced Senior System Administrator to oversee and support our on-premise IT infrastructure. This role is crucial in ensuring the high availability, security, and operational stability of our local systems. The ideal candidate will be structured, security-conscious, and adept at navigating a regulated fintech environment.

first-circle seeks a Senior Systems Administrator based in Belgrade, Vojvodina, Serbia. The role centers on managing and configuring IT systems to ensure infrastructure remains secure and reliable. Key responsibilities Administer and configure company systems on a daily basis Monitor performance, troubleshoot issues, and maintain system reliability Apply security measures to safeguard data and infrastructure Collaborate with other departments to deliver solutions that support productivity Team collaboration This position works closely with colleagues throughout the organization. Supporting technology needs and helping introduce new tools or processes are regular parts of the role.

Join our dynamic team at psicro as a Junior IT Systems Administrator. In this role, you will support our IT infrastructure, assist in troubleshooting, and maintain system performance. This is a fantastic opportunity for recent graduates or those starting their careers in IT.

Become a part of Perplexity AI as a Search Golang Engineer and play a crucial role in shaping the future of highly scalable, AI-driven search infrastructure. In this dynamic position, you will utilize your expertise in Golang to create, implement, and manage backend systems capable of efficiently processing millions of queries with unparalleled reliability.Responsibilities:Develop robust and scalable distributed backend services utilizing Golang.Design, enhance, and sustain search infrastructure to accommodate rapid traffic increases.Create cloud-native solutions focusing on horizontal scalability and quick failover capabilities.Establish comprehensive monitoring, autoscaling, and incident recovery mechanisms.Work closely with product, infrastructure, and DevOps teams to optimize throughput and system resilience.Lead improvements in CI/CD processes, automation, and operational excellence for backend systems.Mentor fellow engineers and advocate for scalable design principles throughout the organization.

P-1415 At Databricks, we are dedicated to empowering data teams to address some of the most challenging issues facing the world today — from revolutionizing transportation to expediting medical advancements. We achieve this by developing and maintaining the premier data and AI infrastructure platform, enabling our customers to leverage deep data insights for business enhancement. Founded by engineers, Databricks is embarking on a multi-year mission to create the most advanced Data Intelligence Platform. Building upon a solid foundation, our ambition is to significantly improve our product offerings. From the Storage Engine (data layout, encryption, caching, etc.) to the Query Engine (vectorization, query optimization, etc.), we aim to reevaluate every component to deliver the fastest, most user-friendly, and secure data platform for all workloads. As a senior software engineer, you will be a pivotal member of not just the Belgrade site but also the foundational team driving our multi-year Lakehouse vision. You will participate in the complete development cycle and embody all fundamental Databricks values (own it, data-driven decision making, teamwork, customer-centricity).

Key Responsibilities Take on a critical Production Support role with 24/7 responsibilities, collaborating with the Global Operations team to ensure 99.99% uptime. Coordinate and prioritize support tasks with fellow DBA team members. Administer databases on Linux-based systems, including Telesign's production databases using Microsoft SQL, PostgreSQL, and MySQL. Engage in activities such as database installation, deployment, maintenance, performance tuning, optimization (SQL queries, stored procedures, and DB engines), troubleshooting, backups/restores, and implementing proactive monitoring to alert Technology Operations to any issues. Assist developers by providing guidance on database query patterns, table design, and performance enhancements, particularly for high transaction volume OLTP/API products, Business Intelligence, Data Warehousing, Data Science, and Knowledge Engineering. Collaborate closely with key personnel to design and build a data warehouse from existing data sources to enhance business operations through decision support, trending, and reporting on vital corporate performance indicators. Serve as the database expert, working with other senior technical staff to deliver highly available and reliable database platforms that support business needs. Provide consultative support to colleagues who may have less expertise in database technologies and their functionalities.

Join us at Databricks, where we are driven by a passion for empowering data teams to tackle the most challenging issues globally — from transforming transportation to fast-tracking medical innovations. We pride ourselves on developing and maintaining the premier data and AI infrastructure platform, enabling our clients to harness deep data insights for business enhancement. Founded by engineers, Databricks is embarking on a transformative journey to create the leading Data Intelligence Platform. We are building on a solid foundation with the ambition to create significantly superior products. Our focus spans everything from the Storage Engine (data layout, encryption, caching, etc.) to the Query Engine (Vectorization, Query Optimization, etc.), with the goal of enhancing every component to offer our customers the most efficient, user-friendly, and secure data platform for all their data workloads. As a Software Engineer, you will be a pioneering member of our Belgrade site and contribute to our multi-year mission to realize our Lakehouse vision. You will engage in the complete development cycle and embody all core Databricks values: ownership, data-driven decision-making, teamwork, and customer obsession.

Join Our Team at Unlimit Unlimit stands at the forefront of the fintech revolution, powering the world's largest proprietary payments infrastructure.Founded in 2009, we operate from 17 global offices and boast a team of over 700 experts, adept at integrating more than 1,000 payment methods into a cohesive platform. From London to São Paulo, we enable businesses to expand internationally with a comprehensive suite of financial tools, including payment processing, alternative payment methods, multicurrency business accounts, card issuance, banking-as-a-service, and crypto services.Our mission is to dismantle financial barriers, facilitating seamless money movement worldwide. We equip innovative businesses with the tools they need to effortlessly manage and execute payments, no matter where they operate.The RoleWe are seeking a skilled Senior Database Administrator to enhance and maintain our production database environment across PostgreSQL, Oracle, and AWS-managed database services.This hands-on technical position emphasizes the reliability, performance, availability, security, and automation of our critical databases. You will collaborate closely with engineering, SRE, and security teams to ensure our database systems are consistently stable, scalable, and secure by design.Key Responsibilities- Administer and support production environments spanning PostgreSQL, Oracle, Aurora/RDS, MongoDB, and DocumentDB.- Guarantee high availability and preparedness for disaster recovery (replication, backups, PITR, and failover testing).- Execute performance tuning, query optimization, and capacity planning.- Develop and uphold backup/restore protocols and upgrade strategies.- Monitor database health, defining actionable alerts and dashboards.- Streamline operational processes through automation and Infrastructure as Code methodologies.- Advocate for secure access models and enforce governance standards.- Engage in incident response and root cause analysis pertinent to database systems.- Contribute to the creation of database standards, documentation, and operational runbooks.- Assist developers with schema design, indexing strategies, and performance troubleshooting.Required Qualifications- A minimum of 5 years of practical experience in database administration or database engineering.- Extensive expertise in PostgreSQL including:replication (physical/logical),partitioning,performance tuning,PgBouncer / RDS Proxy,vacuum strategy,pgvector.- Solid experience with Oracle including:backup/restore,performance tuning,and other related tasks.

At Perplexity, we are in search of a passionate Backend/Infrastructure Engineer Intern to join our dynamic and impactful team dedicated to enhancing our search capabilities. This role presents a unique opportunity to collaborate with seasoned engineers in designing, building, and maintaining the robust infrastructure and backend services that ensure Perplexity remains fast, reliable, and scalable.Internship Duration: 12 - 24 weeks, full-time, in-person at our Belgrade office.Key Responsibilities:Construct and uphold infrastructure that drives high-performance search systems, with guidance from senior engineers.Design and implement internal tools and automation to enhance developer workflows and operational productivity.Aid in the design, deployment, and monitoring of cloud-native systems utilizing AWS.Contribute to the optimization of CI/CD pipelines, testing infrastructure, and release processes.Debug and enhance Linux-based services, containers, and backend systems.Participate in coding for products, primarily utilizing Rust, Go, or C++.Qualifications:Currently pursuing a degree in Computer Science, Engineering, or a related field, or possess equivalent practical experience.Familiarity with at least one programming language such as Go, Rust, or C/C++, gained through academic coursework or personal projects.A basic understanding or exposure to cloud infrastructure (e.g., AWS) and Linux systems is advantageous, though not mandatory.A keen interest in infrastructure, distributed systems, or backend engineering, along with a willingness to learn about CI/CD, monitoring, and performance optimization.A proactive, inquisitive learner who thrives in a fast-paced, innovative setting.

Speechify seeks a Software Engineer specializing in Data Infrastructure and Acquisition to join the team in Belgrade, Serbia. This position involves creating and maintaining systems that bring together information from many sources, directly shaping the way users interact with Speechify’s products. Key Responsibilities Design and build data infrastructure that meets product requirements Integrate data from multiple sources into established systems Work on projects aimed at improving user experience and strengthening platform performance Location This role is based in Belgrade, Serbia.

Founded in 1997, Libertex Group has been a pioneering force in the online trading sector, seamlessly blending cutting-edge technology with market dynamics and digital innovations.The award-winning Libertex trading platform provides traders with the tools to engage in the market, offering opportunities to invest in stocks or trade CFDs linked to commodities, Forex, ETFs, cryptocurrencies, and more.Passionate about the unifying power of sports, Libertex proudly serves as the Official Online Trading Partner of the Audi Revolut F1 Team.Join us in creating innovative fintech solutions, empowering individuals to #TradeForMore with Libertex.Job OverviewWe are seeking a skilled Infrastructure Engineer to architect, deploy, and maintain robust and secure infrastructure solutions on AWS and in remote data centers. The successful candidate will have a strong emphasis on automation, utilizing Terraform and Terragrunt, and will possess an extensive background in cloud networking and infrastructure as code. Proficiency in proactive monitoring, troubleshooting, and effective communication within cross-functional teams is essential.

Role Overview JetBrains s.r.o. creates tools that help developers work smarter. The team is looking for a Software Engineer with experience in CLion, embedded debugging, and tool integrations. This position is open in several locations: Belgrade, Berlin, Limassol, Madrid, Munich, Paphos, and Warsaw. What You Will Do Design and enhance features in CLion focused on embedded systems. Debug and optimize embedded applications for reliability and performance. Integrate different development tools to improve workflow efficiency. Work with teams across disciplines to define needs and deliver solutions. Who We’re Looking For This role suits engineers who enjoy solving complex problems and improving developer tools. Curiosity, creativity, and a strong interest in technology are valued here.

As a Senior Business Systems Analyst at Acumatica, you will play a pivotal role in enhancing our platform by leveraging your expertise in business analysis and systems design. You will collaborate with cross-functional teams to gather requirements, develop solutions, and ensure optimal performance of our systems.

P-1416 At Databricks, we are dedicated to empowering data teams to tackle the world's most challenging problems — from transforming transportation to accelerating medical innovations. Our mission is realized through the creation and management of the world's leading data and AI infrastructure platform, enabling our clients to harness deep data insights for enhanced business performance. Founded by engineers, Databricks has embarked on a multi-year journey to develop the premier Data Intelligence Platform. We are enhancing a strong foundation to create significantly improved products. From the Storage Engine (data layout, encryption, caching, etc.) to the Query Engine (Vectorization, Query Optimization, etc.), we aim to reimagine every component to deliver the fastest, most user-friendly, and secure data platform for all workloads. As a software engineer, you will be a pivotal member of the Belgrade site, contributing to the foundational team dedicated to realizing our Lakehouse vision. You will engage in the complete development cycle and embody all core Databricks values (ownership, data-driven, teamwork, customer-centric).

Rivian and Volkswagen Group Technologies brings together two major automotive innovators to shape the future of software-defined vehicles. The team focuses on advanced operating systems, zonal controllers, and cloud connectivity, aiming to raise the bar for electric vehicle technology worldwide. Collaboration draws on deep experience in connectivity, artificial intelligence, and security to deliver vehicles that are smarter, more connected, and more sustainable. Role overview The Software Engineering Intern - Connected Systems will work on distributed systems that power in-vehicle features and link them to the Cloud Gateway and its supporting infrastructure. This role involves helping design, develop, and maintain core services that ensure these systems operate reliably and efficiently. What you will do Support the development and upkeep of distributed systems for connected vehicles Assist in designing and building core services that enable in-vehicle and cloud communication Contribute to efforts that keep these systems stable and reliable Location This internship is based in Belgrade.

Join our team at psicro as an Office Administrator, where you'll play a key role in streamlining our operations and enhancing our workplace efficiency. This position requires a proactive individual who is organized, detail-oriented, and has strong communication skills. As an Office Administrator, you will manage office tasks, coordinate schedules, and support various departments to ensure smooth daily operations.

Easygo, an Australian technology leader, powers renowned global brands such as Stake, KICK, and Twist Gaming. As we expand our engineering hub in Belgrade, we are seeking a talented Staff/Senior DevOps Engineer to join our dynamic Stake DevOps team. In this role, you will be instrumental in designing, operating, and enhancing systems that cater to millions of users worldwide.This is a proactive, hands-on position ideal for individuals who thrive on ownership, enjoy tackling real-world production challenges, and prefer close collaboration with engineering teams to facilitate rapid, reliable, and secure delivery.Who We’re Looking ForAs a Staff/Senior DevOps Engineer at Easygo, you will have a pivotal role in developing, maintaining, and continuously refining our cloud infrastructure and delivery pipelines, emphasizing reliability and production readiness. You will collaborate closely with software engineers, platform teams, and security experts to ensure our systems remain highly available, observable, and resilient at scale. Your responsibilities will include shared production support across various regions, working in a follow-the-sun model, to enhance our operational effectiveness in production.We value engineers who take ownership, demonstrate pragmatic thinking, and enjoy working with real systems. You will adeptly balance platform development with operational duties, consistently seeking ways to enhance reliability, operational maturity, and the overall production experience.Key Responsibilities:Design, implement, and manage scalable cloud infrastructure solutions utilizing AWS, Kubernetes (K8s), and Terraform (TF IaC).Develop and maintain CI/CD pipelines using tools like ArgoCD and GitHub Actions for swift and dependable deployments.Ensure infrastructure security, compliance, and adherence to best practices in cloud-native environments.Work collaboratively with software engineering teams to promote DevOps best practices, automation, and operational excellence.Apply Site-Reliability Engineering best practices.Enhance and manage observability and monitoring solutions using Datadog or similar platforms.Provide technical leadership by advocating for best practices in infrastructure as code, cloud security, and site reliability.Analyze and resolve complex issues to contribute to team objectives and initiatives.Lead and independently execute engineering projects from conception to completion.Engage with stakeholders, including IT security, product managers, and engineering teams, to effectively communicate DevOps-related concerns and mitigate risks.Foster innovation within the team by advocating for improvements and driving initiatives.

Renesas Electronics Corporation seeks a Senior DevOps/Site Reliability Engineer based in Belgrade. The main focus is on maintaining and improving cloud infrastructure, with particular attention to system reliability and performance. Main responsibilities Develop and implement automation tools for deployment and monitoring in collaboration with teams across the company Work to improve cloud infrastructure to ensure stable and efficient operations Optimize processes to support the delivery of reliable, high-quality services to clients Collaboration and teamwork This role requires working closely with cross-functional teams. The goal is to streamline workflows and enhance system performance by focusing on automation and proactive monitoring.

Join Unlimit as a Site Reliability Engineer (SRE) and play a crucial role in enhancing the reliability, scalability, and performance of our innovative fintech platform. Collaborate with cross-functional teams to design, implement, and maintain cloud-based infrastructure and distributed systems. Your expertise in Linux systems engineering, Kubernetes, and automation will be pivotal in driving service availability, operational excellence, and a culture of continuous improvement.