Backend Developer (Node.js) - Remote Opportunity

Position OverviewJoin our dynamic team as a Backend Developer, where you will play a pivotal role in architecting the backbone of our global fundraising platform. You will tackle complex challenges within a high-load, distributed architecture, working to develop and scale the infrastructure that processes millions in donations monthly.HighlightsLocation: Ful…

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!

Orion Innovation is an award-winning global business and technology services firm that focuses on transformative business solutions and product development. We specialize in digital strategy, experience design, and engineering, combining agility, scalability, and maturity to serve a diverse range of clients across various industries, including financial services, telecommunications, consumer products, automotive, industrial automation, and more.Our client is a leader in providing cloud-based unified communication solutions for businesses, offering a feature-rich business phone system without the need for capital investment or maintenance contracts. This innovative approach reduces customer costs and disrupts traditional on-premises PBX providers.The Telephony team is dedicated to developing high-load server solutions for our cloud-based telephony core, continually enhancing our product with new features and improving core application architecture for enhanced performance and stability.

Join Our Dynamic Team!At Xsolla, we're redefining the future of video game commerce with our innovative tools and services designed to empower developers across the gaming industry. Whether you're working with indie games or blockbuster titles, Xsolla partners with you to navigate funding, distribution, marketing, and monetization challenges. We are dedicated to providing opportunities and resources for creators, ensuring they have everything they need to succeed. Our headquarters in Los Angeles, California, drives our mission as the merchant of record, assisting over 1,500 game developers globally in reaching wider audiences and expanding their businesses. If you're passionate about gaming and technology, we want you on our team!For more details, visit xsolla.com.

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 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 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.

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.

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.

P-1416 At Databricks, we are driven by a passion for empowering data teams to tackle some of the world's most complex challenges—ranging from revolutionizing transportation to accelerating medical innovations. We achieve this by developing and maintaining the premier data and AI infrastructure platform, enabling our clients to harness deep data insights to optimize their operations. Founded by a team of engineers, Databricks is on an ambitious journey to create the ultimate Data Intelligence Platform. While we are building on a robust foundation, our vision is to enhance every component to deliver a faster, more user-friendly, and secure data platform capable of handling diverse data workloads. As a software engineer, you will be a vital member of the inaugural Belgrade team and contribute significantly to our multi-year mission to realize the Lakehouse vision. You will engage in the end-to-end development lifecycle and embody the core values of Databricks. Your Impact: Our backend teams tackle a variety of challenges across our essential service platforms. You may work on: Complex issues spanning both product and infrastructure, including distributed systems, large-scale service architecture, monitoring, workflow orchestration, and enhancing developer experience. Building reliable, secure, and high-performance services and client libraries to manage and access vast amounts of data on cloud storage solutions like AWS S3, GCS, and Azure Blob Store. Contributing to product features that enable our customers to effortlessly store and retrieve their data. What We Seek: Bachelor's degree (or higher) in Computer Science or a related discipline. 8+ years of production-level experience in Java, Scala, C++, or similar programming languages. Proven experience in developing large-scale distributed systems. Experience with SaaS platforms or Service-Oriented Architectures. Solid understanding of SQL.

Role Overview Renesas Electronics Corporation is seeking a Senior QA Engineer with a strong background in full-stack and backend systems. This position is based in Belgrade. What You Will Do Identify software issues and contribute to their resolution Design and maintain test plans for new and existing products Work closely with cross-functional teams to develop and implement effective testing strategies Help ensure the reliability and quality of software releases Support quality assurance processes that align with current development practices Who We’re Looking For Experience with both full-stack and backend development environments Strong problem-solving skills and attention to detail Ability to collaborate with engineers, product managers, and other stakeholders Background in designing and executing test plans

About SmartcatSmartcat is revolutionizing the future of work by merging human intelligence with digital assistants, achieving extraordinary productivity gains for top-tier enterprises.We are pioneers in a groundbreaking field: Agentic AI. Our technology empowers businesses to create high-performing hybrid teams that integrate human talent with AI agents. These AI agents are customized digital partners, trained on your best practices, content, and strategies—ready to contribute effectively from day one.Our sophisticated platform leverages generative AI, human-in-the-loop processes, and a dynamic Enterprise Skill Graph that perpetually evolves. Whether you’re launching a global product, onboarding new employees, translating educational content, or coordinating legal teams across different regions, Smartcat transforms knowledge into actionable results and scales your operations seamlessly.Over 1,000 organizations, including 20% of the Fortune 500, trust Smartcat to expand their global reach—swiftly, accurately, and in multiple languages. As a Series C company experiencing 130% annual growth, we are rapidly expanding and are committed to hiring individuals eager to shape the future of work alongside us.Join us in unlocking global potential, one human and AI team at a time.

Join Our Innovative Team! We are excited to announce that our dynamic online marketplaces, tutti.ch and anibis.ch, are on the lookout for a talented Senior Backend Engineer to enhance our team. At SMG, we prioritize our people—discover more about our culture from your future hiring manager, Nikola Cvorovic. Your Role in Our Backend Team At tutti.ch/anibis.ch, we operate within stream-aligned product teams that utilize the SCRUM framework. Each team is composed of 2–3 Backend Engineers, a Product Owner, an Engineering Manager, Designers, and Mobile and Web Engineers. Collaboration is key as our teams work closely with Platform (infrastructure) and Data (BI) teams, with each product team responsible for a specific domain. As an engineer, you will take charge of design, implementation, deployment, and monitoring. We leverage Go-based backend services hosted on AWS with Kubernetes, serving over 300k users daily. Code review and deployment occur directly from GitHub. Our technology stack includes PostgreSQL, Elasticsearch, Redis, SendGrid (for emails), and Auth0 (for authentication). We ensure high test coverage with tools like Testify, including integration tests for databases, Redis, and Kafka.

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.

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 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.

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.

TransPerfect is on the lookout for enthusiastic and skilled individuals to fill the role of Frontend/JavaScript Developer within our dynamic development team. You will be instrumental in crafting web-based applications that cater to tens of thousands of users globally.As the largest provider of language and technology solutions in the world, TransPerfect empowers businesses to communicate and connect effortlessly across cultural boundaries. With over 100 offices on six continents, we provide services in more than 200 languages, aiding our clients in creating localized products, services, applications, training materials, and content tailored to diverse markets. Our commitment to innovation and cultural insight helps organizations succeed in a rapidly interconnected world.Join our passionate team of developers in Kragujevac and help shape the future of localization technology. You will be responsible for building platforms that automate and streamline the localization process, enabling major global companies to engage international audiences more swiftly and efficiently than ever. At TransPerfect, you will have the opportunity to grow your career in a vibrant, multinational environment, collaborating with a young, motivated, and innovative team.We seek individuals who thrive in fast-paced settings, embrace challenges, and are eager to learn. Our team transforms ideas from senior management into impactful solutions, moving swiftly from prototypes to fully realized products—many of which are vital to our company's success.As a Frontend Developer, you will work on mission-critical applications as part of a talented team. Your role will involve designing, developing, delivering, and maintaining high-performance applications with low latency. This position presents a unique opportunity to influence product functionality and explore cutting-edge technologies while tackling exciting challenges.

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.