AI-Native Solution Architect with Node.js and Angular Expertise

About Unlimit Unlimit stands at the forefront of the global fintech landscape, powering the world’s most extensive proprietary payments infrastructure.Established in 2009, we operate from 17 global offices, housing over 700 talented professionals dedicated to integrating more than 1,000 payment methods into a cohesive platform. Whether in London or São Paulo, we empower businesses to expand internationally with a comprehensive suite of financial solutions — including payment processing, alternative payment methods, multicurrency business accounts, card issuing, banking-as-a-service, and crypto on- and off-ramps.Our mission is to dismantle financial barriers and facilitate seamless money movement across borders. We equip innovative businesses with the tools necessary to manage, accept, and send payments effortlessly, regardless of their operational reach.About the RoleUnlimit is on a transformative journey in technology. As a leading fintech with a diverse product portfolio — encompassing card acquiring, banking-as-a-service, payment gateways, crypto solutions, and digital wallets — we are reconstructing our core backend systems to be AI-driven, modular, and cloud-agnostic.We are in search of a visionary and hands-on Solution Architect to spearhead this transformation. This role balances strategy with execution: you will define and implement cutting-edge architecture that is scalable, resilient, and embedded with real-time AI capabilities.Collaboration is key as you work at the intersection of architecture, infrastructure, and delivery, partnering closely with Product, DevOps, Engineering, and Data teams. Your contributions will directly influence systems that serve thousands of merchants around the globe, ensuring near-zero downtime, enhanced observability, and seamless integration of AI agents into critical workflows. This is a unique opportunity to join Unlimit during a pivotal moment and shape the future of financial infrastructure.

Join Unlimit as an AI Quality Assurance Engineer, where you will play a pivotal role in ensuring the highest quality standards for our innovative backend systems and user-friendly interfaces that manage card transactions from start to finish. In this dynamic position, you will not only perform testing but will also integrate quality assurance deeply into our payment infrastructure, guaranteeing reliability, precision, and compliance in our high-volume, cloud-native environment. Be part of a team that is dedicated to breaking down financial barriers and facilitating seamless money movement across borders.

Join us in revolutionizing the future of shopping!At Gorgias, we are dedicated to creating a transformative platform that integrates AI technology to enhance customer interactions throughout their shopping journey. We believe that Conversational Commerce is the future of e-commerce, and we are at the forefront of this exciting evolution.Our mission is to foster meaningful relationships between brands and customers by ensuring every interaction is personal, seamless, and intelligent. By leveraging advanced AI capabilities alongside our extensive product knowledge, we are making the shopping experience more intuitive and connected than ever before.To succeed in this endeavor, we maintain an unwavering focus on:Quality: authentic and brand-aligned conversations.Experience: a frictionless shopping path from chat to checkout.Re-engagement: personal, one-on-one dialogues instead of disruptive marketing.The potential for growth is tremendous. As AI continues to reshape purchasing behaviors, Gorgias is laying the groundwork for the next decade of e-commerce, where every brand boasts its own intelligent assistant and every customer feels valued and understood.Join us in making Conversational Commerce a reality.About the TeamBecome a key member of our AI Agent team, which is essential to Gorgias's goal of establishing itself as the premier conversational platform for e-commerce. Our AI solutions facilitate millions of support and sales interactions daily, delivering exceptional experiences and driving substantial revenue growth for brands worldwide. Your contributions will directly impact how shoppers discover products, receive timely assistance, and make purchasing choices around the clock.As a Software Engineer, you will design, construct, and scale the AI-driven platform that powers automated e-commerce support and sales. This role is high-impact, allowing you to influence our architecture, performance, and observability strategies to ensure our systems remain scalable, reliable, and efficient.

About the Companylavendo is revolutionizing the way small businesses manage customer communications with their innovative AI-driven voice system. This cutting-edge platform operates seamlessly to answer calls 24/7, schedule appointments, and manage customer inquiries automatically—eliminating the need for complex coding or setup. Founded by a team of seasoned entrepreneurs with extensive knowledge in AI and business operations, lavendo has created a solution that captures previously untapped revenue opportunities, with over 1,000 satisfied customers already experiencing the benefits. As the company expands its reach across various sectors including restaurants, dental practices, HVAC services, cleaning services, and call centers, they are on a mission to develop a category-defining product in a vastly underserved market.The OpportunityIn the role of Solutions Implementation Engineer, you will take on a pivotal position where your contributions will directly influence the deployment and scaling of AI technologies within real-world business environments. Collaborating closely with the CTO and a senior engineering team, you will define integration architecture, delivery methodologies, and technical standards within this rapidly growing AI startup. This position allows you to blend advanced backend engineering skills with strategic, client-facing responsibilities, creating integrations that are essential to driving revenue operations and facilitating large-scale adoption of AI among major clients and partners.What You'll DoAssist the Enterprise Integrations team in overseeing and executing integration processes from initial design to final deployment.Gather and clarify requirements from internal stakeholders, assess task complexity, and schedule delivery timelines.Design and build reliable, scalable integration solutions using technologies such as Python, REST, gRPC, Apache Kafka, Redis, and SQL.Conduct regular code reviews to ensure a consistent, high-quality codebase.Adhere to delivery deadlines, ensuring that all solutions are production-ready and technically robust.Monitor and stabilize integrations after deployment using observability tools like Grafana.Proactively identify and address challenges to maintain project momentum, demonstrating a strong commitment to execution.What You BringA minimum of 4 years of hands-on backend development experience.A robust technical skill set including Python (FastAPI), REST, gRPC, SQL, Apache Kafka, Redis, and Postman.Experience designing and implementing scalable, reliable integration solutions.

Join Databricks as a Senior Backend Software Engineer and be part of our pioneering team in Belgrade, Serbia. At Databricks, we are dedicated to empowering data teams to tackle some of the most pressing challenges across various industries, from revolutionizing transportation to accelerating groundbreaking medical discoveries. Our mission is to create and maintain the most advanced data and AI infrastructure platform, allowing our clients to leverage deep data insights for enhanced business outcomes.Founded by visionary engineers, Databricks is on a multi-year journey to develop the ultimate Data Intelligence Platform. While we have a solid foundation, our ambition is to innovate and enhance every aspect of our offerings, ensuring our customers experience the fastest, most user-friendly, and secure data platform for their diverse workloads.As a Senior Software Engineer, you will play a crucial role as a founding member of our Belgrade site, contributing significantly to our Lakehouse vision. You will engage in all phases of the development cycle while embodying the core values of Databricks.Your Impact:Our backend teams tackle a range of challenges across essential service platforms, including:Addressing complex issues related to product and infrastructure, such as distributed systems, scalable service architecture, monitoring, workflow orchestration, and enhancing developer experience.Designing reliable, secure, and high-performance services and client libraries for the efficient storage and access of vast amounts of data across cloud storage backends like AWS S3, GCS, and Azure Blob Store.Creating product features that enable our customers to effortlessly store and access their data.

Join the Future of Conversational Commerce!At Gorgias, we envision a world where conversations are the primary mode of shopping. We are developing an advanced platform featuring a unified AI agent designed to sell, support, and re-engage customers throughout their shopping journey. As pioneers in conversational commerce, we are shaping the future of eCommerce.Our mission is to transform every interaction between brands and their customers into meaningful relationships—personal, seamless, and intelligent. By leveraging deep product knowledge and cutting-edge AI technology, we strive to make shopping feel more natural, human, and connected than ever.To succeed, we are dedicated to:Quality: Ensuring conversations are authentic and aligned with brand identity.Experience: Offering a frictionless shopping experience from chat to checkout.Re-engagement: Fostering personal, one-on-one dialogues over intrusive marketing.The potential is immense. With AI revolutionizing purchasing behaviors, Gorgias is laying the groundwork for the next decade of eCommerce—where every brand has its own intelligent agent and every customer feels valued and understood.Become a part of our mission to realize the promise of conversational commerce!Potential Teams to JoinRealtime Communication Team: Responsible for the core ticket processing pipeline for Gorgias's helpdesk, managing real-time event distribution to internal applications (including our AI Agent) and third-party integrations while also developing voice and SMS channels.Messaging Team: Oversees the asynchronous messaging infrastructure within Gorgias, empowering agents to handle customer conversations across email, chat, and social platforms, serving as the gateway between Gorgias and the external world.Growth Team: Manages the customer journey from onboarding to billing, ensuring a smooth experience while safeguarding against fraud.In-App Analytics Team: Develops in-product analytics and real-time processing features, providing internal teams with enhanced tools and datasets.Streaming Infrastructure Team: Constructs a scalable data streaming platform, offering tools and guidelines for data propagation and aggregation across multiple availability zones.Your Role:Design: Create features, APIs, and models for 16,000 merchants and 12 million shoppers globally.Collaborate: Work closely with an engineering manager, product manager, and designer to drive projects forward.

Join easygo, an innovative Australian technology powerhouse, as we continue to expand our engineering footprint in Belgrade. We are on the lookout for a Senior Backend Engineer to become a vital part of our Data and Integration Infrastructure team, responsible for architecting and enhancing the platforms that drive our global offerings.About the TeamYou will collaborate with a talented engineering group dedicated to empowering product and service teams, particularly on Kick. Our team is focused on developing and sustaining foundational platform capabilities that support the core systems of Kick, enhancing reliability, consistency, and the overall developer experience.Our responsibilities include ownership of essential components such as event pipelines, schema governance, service gateways, and notification delivery systems. These elements guarantee that Kick’s services communicate effectively and that data transactions across the platform are accurate, observable, and primed for analytics.By delivering robust, well-architected platform foundations and templates, our team significantly influences how Kick is constructed and scaled, streamlining workflows, minimizing redundancy across teams, and establishing a solid base for reliable integrations and data-informed decision-making.Who We’re Looking ForWe seek a Senior Backend Engineer proficient in Go, who is passionate about building platform-level capabilities that empower engineering teams to operate more efficiently and securely.The ideal candidate will take pride in designing and maintaining dependable, scalable systems, understanding the crucial impact that strong platform foundations have on the success of a large, evolving organization.You should feel at ease working on core infrastructure and shared services, and possess a strong commitment to engineering excellence. You’ll value clean interfaces, well-defined contracts, and highly observable systems, approaching complex challenges in a pragmatic and thoughtful manner.As a senior engineer, you will be expected to:Independently tackle complex, high-impact projectsEngage meaningfully in technical discussions and architectural decisionsMentor and uplift others through code reviews, knowledge sharing, and teamworkIf you are motivated by enabling others and making a lasting impact, and if you thrive in environments where enhancing reliability, data quality, and developer experience is just as crucial as delivering new features, we want to hear from you!

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.

About LavendoAt Lavendo, we are revolutionizing the way small businesses manage customer interactions through our innovative AI-driven voice system. Our platform operates seamlessly, providing 24/7 call answering, appointment scheduling, and automated customer request handling without requiring any coding or complex setups. Founded by seasoned entrepreneurs with extensive expertise in AI and business operations, we have successfully developed a solution that captures lost revenue for businesses, with over 1,000 satisfied customers already experiencing a positive impact. As we expand our reach across various industries, including restaurants, dental practices, HVAC services, cleaning companies, and call centers, we are creating a category-defining product within a vast and underserved market.Our MissionLavendo is dedicated to making enterprise-level AI accessible to every small business owner. Our goal is to empower these businesses to capture every customer, minimize manual tasks, and unlock substantial new revenue streams without the complexity or friction often associated with technology. We strive to enable every business, no matter the size, to operate with the efficiency and capabilities of a large enterprise.The RoleAs a Solutions Integration Engineer, you will take on a high-impact role that allows you to directly influence the deployment and scaling of AI technology in real-world business settings. Collaborating closely with our CTO and a senior engineering team, you will define the integration architecture, delivery strategies, and technical standards for our growing AI startup. This position offers a unique opportunity to blend deep backend engineering expertise with strategic stakeholder engagement, crafting integrations that are pivotal to our customers’ revenue streams and facilitating the large-scale adoption of AI solutions by major accounts and partners.Key ResponsibilitiesLead the end-to-end delivery of integration projects, from initial scoping and design through development, testing, and deployment, ensuring all solutions align with business needs and meet production-ready standards.Work alongside the Lead Engineer to oversee the integration lifecycle: defining requirements, structuring and assigning tasks, monitoring progress, and ensuring timely delivery.Design and document integration solutions utilizing technologies such as Python, REST, gRPC, Kafka, Redis, Postman, and SQL, supported by UML, DFD, ERD, and BRD documentation.Manage daily project operations by planning sprints, tracking progress, resolving obstacles, and maintaining delivery momentum.Collaborate with stakeholders to align goals, manage project scope, and prevent deviations from established priorities.Champion Agile/Scrum methodologies to enhance team efficiency and project outcomes.

Renesas Electronics Corporation seeks a Senior Backend Software Engineer based in Belgrade. This role centers on designing, developing, and maintaining backend systems that power the company’s technology products. Key responsibilities Create backend architectures focused on high performance and reliability Build and maintain software components for backend services Collaborate with cross-functional teams to deliver technical solutions Improve existing systems to enhance scalability and efficiency Requirements Proven experience in building and maintaining backend systems Strong problem-solving abilities, with a focus on performance Ability to work effectively with colleagues from various disciplines This position provides opportunities to contribute to technology that supports Renesas products worldwide. Those who enjoy tackling complex backend challenges will find this role engaging.

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.

Renesas Electronics Corporation seeks a Senior Backend Software Engineer based in Belgrade. The position centers on developing and maintaining backend systems that power advanced technology initiatives. Role overview This engineer will work on backend infrastructure, ensuring reliability and scalability for ongoing projects. The work involves supporting complex technology solutions that require careful planning and execution. Collaboration Regular interaction with colleagues from various disciplines is expected. Teamwork and clear communication are important, as projects often span multiple areas of expertise.

At Databricks, we are dedicated to empowering data teams to tackle the world’s most challenging problems—whether it's revolutionizing transportation or advancing medical innovations. Our mission is to create and operate the leading data and AI infrastructure platform, enabling clients to harness deep data insights for improved business outcomes.Founded by visionary engineers, Databricks is on an exciting multi-year journey to develop the ultimate Data Intelligence Platform. We are building upon a robust foundation with the ambition to create significantly better products. Our aim is to reimagine every component to deliver the fastest, easiest, and most secure data platform suited for all data workloads.As a Backend Software Engineer, you will become a key member of not only the Belgrade site but also a pivotal team in our quest to realize the Lakehouse vision. You will engage in the complete development cycle and embody the core values of Databricks.

Join Gambling.com Group (Nasdaq: GAMB), a leader in the online gambling industry, renowned for our award-winning marketing and sports data services. Our extensive portfolio includes prominent websites, such as Gambling.com and Bookies.com, along with iGaming-focused platforms like Casinos.com, BonusFinder.com, and Freebets.com.As our data ecosystem undergoes rapid transformation, we are on the lookout for a skilled Senior Data Architect to guide the evolution of our data infrastructure. This is your opportunity to develop scalable and efficient systems that offer profound insights into player interactions, financial reporting, and cross-sectional business analytics.Role Overview:In your role as a Senior Data Architect, you will lead the redesign and reconstruction of our data architecture, catering to the specific requirements of our business teams. You will transition from traditional manual file processes to a sophisticated, automated ETL pipeline, leveraging a Medallion architecture (comprising Bronze, Silver, and Gold layers) integrated with a Hub-Spoke model for centralized data management and distributed accessibility. Your expertise in technologies such as Snowflake and Airflow will ensure seamless data ingestion from varied sources, encompassing finance, operations, and other business verticals. Our aim is to forge a unified perspective of player and operator interactions across multiple sites, empowering advanced analytics, reporting, and strategic decision-making.Key Responsibilities:Lead the comprehensive redesign of existing data architecture, migrating from manual file handling to a robust, scalable system utilizing Medallion architecture principles for data layering and quality assurance.Design and implement a Hub-Spoke model to centralize core data assets (e.g., player and operator profiles) while facilitating spoke systems for vertical-specific analytics, ensuring data consistency and accessibility.Revamp ETL processes using Airflow for orchestration, automating data pipelines to handle ingestion from various sources, including real-time player activity, operator metrics, and cross-site journeys.Construct pipelines for data ingestion from all business verticals (e.g., finance, marketing, operations), delivering comprehensive reporting for finance teams and expanding support for holistic player/operator views.Focus on architecting iGaming-specific solutions centered on player and operator data, monitoring journeys across sites, ensuring compliance with industry regulations, and enabling personalized recommendations.Optimize the use of Snowflake for data warehousing, applying best practices to enhance performance and scalability.

Become a vital part of our Automotive team and contribute to the evolution of a cutting-edge platform that drives next-generation digital mobility solutions. As a Senior Backend/Platform Engineer, you will be tasked with designing and developing scalable, high-performance backend systems that cater to millions of users and intricate automotive ecosystems. If you have a passion for clean architecture, platform innovation, and developing impactful systems, we would love to connect with you.Your ResponsibilitiesCollaborate with a dynamic cross-functional team to deliver meaningful product increments.Design and implement production-ready Java services adhering to established engineering standards and best practices.Engage in architectural decisions and technical dialogues, influencing the development of our backend and platform capabilities.Manage the production operation and monitoring of backend systems.Enhance and maintain systems in cloud-native environments, specifically AWS and Kubernetes.Focus on improving the reliability, scalability, and maintainability of our platform continuously.Contribute to CI/CD pipelines and infrastructure configuration relevant to backend services.Mentor team members and support their technical development proactively.

Join our dynamic Crawler team at Perplexity as a Senior Backend Software Engineer. In this pivotal role, you will be responsible for designing, developing, and managing systems that handle the ingestion, processing, and management of vast web-scale data to support our cutting-edge search technologies. This is a high-impact engineering position that requires a blend of backend and frontend expertise within our data acquisition stack.Key ResponsibilitiesLead the development of large-scale web crawlers, ingestion pipelines, and data processing systems.Construct, maintain, and optimize vital backend and frontend components for crawler services, including storage solutions, data retrieval functions, and UI dashboards for effective data management.Work closely with Search and Infrastructure teams to ensure efficient and high-quality ingestion and processing of billions of web pages.Architect and implement full-stack features and scalable distributed systems capable of handling high loads and real-time data operations.Experiment with innovative approaches to rapidly enhance system performance, usability, and reliability.QualificationsAt least 5 years of software development experience with a solid understanding of data structures and algorithms in languages such as Python, C++, Rust, or Go.Experience in developing large-scale web crawlers is highly preferred.Demonstrated expertise in building, deploying, and optimizing high-load, distributed services.Strong knowledge of cloud infrastructure, particularly hands-on experience with Kubernetes (K8s) and AWS.A passion for writing clean, efficient, and scalable code.

Summary The Senior Qlik Sense Architect & Developer role merges advanced development skills with architectural leadership to produce scalable, high-performance Qlik Sense reports. In this pivotal position, you will craft and implement Qlik Sense applications that cater to diverse business product lines. Collaborating closely with analysts and business stakeholders, you will convert their requirements into impactful analytics solutions. The role emphasizes hands-on development while offering opportunities to mentor junior developers. As the Qlik Architect, you will oversee the design, development, and governance of a multi-node and distributed Qlik platform. Responsibilities Expertise in developing advanced Qlik Sense reports (Data Model & Dashboard) Proven ability to manage and optimize large data volumes Experience in performance tuning, scalability design, and application optimization Hands-on proficiency with Qlik Sense extensions, JavaScript, SAP connectors, and Qlik APIs Solid understanding of data warehousing and BI principles, especially data modeling and SQL development Experience in designing and supporting multi-node and distributed environments Comprehensive knowledge of Qlik platform architecture, including server configuration, security, and user/document management Understanding of enterprise infrastructure and security concepts, including Windows Server environments, Active Directory, Proxy servers, Single Sign-On (SSO), and system monitoring best practices Practical experience with Qalyptus is advantageous Familiarity with Version Manager or WIP is a plus Experience with other reporting tools is beneficial Working knowledge of AWS cloud services is a plus Requirements Minimum of 6+ years of experience as a Qlik Sense Architect/Developer A genuine passion for IT with a creative problem-solving approach Proactive mindset with strong ownership and accountability Analytical mindset with a keen attention to detail Aptitude for troubleshooting complex data and performance challenges Excellent communication skills, capable of engaging both technical and non-technical stakeholders (English is mandatory; French or Dutch is a plus) Strong comprehension of BI best practices and data visualization principles

Join Perplexity as a Senior Infrastructure Engineer and play a pivotal role in transforming how individuals search and engage with the internet. Your dedication and expertise will be essential in delivering a top-tier product. This position uniquely combines infrastructure mastery with software engineering, allowing you to take ownership of the crucial systems that drive our products and development processes.Key ResponsibilitiesConstruct and sustain a robust and scalable infrastructure to enable high-performance search functionalities.Create internal tools and automation processes to enhance developer workflows and operational effectiveness.Architect, deploy, and manage cloud-native systems, primarily utilizing AWS.Enhance and maintain CI/CD pipelines, testing frameworks, and release protocols.Troubleshoot and optimize Linux environments, containerized applications, and backend services.Contribute directly to product codebases, engaging with languages such as Python, Go, and other systems-level languages.QualificationsProven experience in cloud infrastructure (AWS preferred), systems architecture, and automation.Extensive knowledge of Linux internals, including performance optimization and debugging techniques.Demonstrated experience in building or maintaining CI/CD systems and associated tools.Strong proficiency in Python and at least one systems programming language (Go, Rust, C/C++, or Java).Ability to navigate both infrastructure and application-level code seamlessly.A proactive and enthusiastic learner who excels in a dynamic, innovative environment.

Join our innovative team at Xsolla as an Unreal Engine Gameplay and Backend Programmer on a 6-month contract basis, with the possibility of extension. In this role, you will be pivotal in developing high-quality game mechanics and backend systems that enhance user experience and engagement. You will collaborate with talented developers and game designers to bring exciting gaming projects to life.