Senior Java Engineer at N-iX | Poland

Join Turnitin as a Senior Fullstack/Backend Software Engineer, where your expertise in backend development, particularly with Java and serverless architectures, will be pivotal. We are seeking engineers who are enthusiastic about creating scalable distributed systems and delivering robust software solutions for our acclaimed educational platform.As an integral member of our shared services team, you'll spearhead the development and enhancement of the core systems supporting both our existing and upcoming applications.Key Responsibilities:Architect, develop, and optimize scalable backend services utilizing Java and serverless technologies (AWS Lambda).Design and implement RESTful APIs and event-driven architectures.Contribute to frontend component development as required.Enhance performance and cost-effectiveness of existing services.Collaborate with cross-functional teams, including Architects, Product Managers, and engineering leads, to deliver innovative solutions.Mentor junior developers and promote best practices.Establish and manage CI/CD pipelines.Maintain high-quality coding standards through peer reviews, automated testing, and compliance with development best practices.Document shared components comprehensively, providing usage guidelines and examples.

Role Overview oscilar is hiring a Senior Backend Engineer with a focus on Java. This remote position is open to candidates based in Poland. The role centers on building and maintaining backend systems that support oscilar’s products and services. What You Will Do Work closely with teams across disciplines to design, implement, and support backend applications Develop scalable, reliable backend systems using Java Contribute to the ongoing improvement of code quality and system performance Location This is a remote role available to candidates located in Poland.

First Connect Insurance Services operates a digital marketplace designed for independent insurance agents in Poland and beyond. The platform connects agents with over 30 leading US insurance carriers, offering a broad range of products including home, auto, and small business coverage. Technology sits at the core of First Connect’s approach. The company invests in software that brings a modern, consumer-grade experience to insurance professionals. Thousands of agents already rely on this platform, with the user base expanding rapidly. What you will work on This role centers on backend engineering for a remote team based in Poland. Work will support the ongoing development of tools and features that help agents access and manage insurance products efficiently. Who this role is for This position suits backend engineers interested in building technology for the insurance sector. The focus is on creating reliable, user-friendly systems that serve a growing community of agents.

Job Overview Join Our Team We are seeking an experienced Senior Backend Engineer (Go) to join Inflect as a contractor within our Engineering team in Poland. This role offers you the opportunity to take significant technical ownership of essential backend services in a hands-on, execution-driven capacity. If you have a passion for building, scaling, and enhancing production systems that drive business success, we'd love to hear from you! This position is ideal for a senior engineer at either a senior or early staff level, showcasing strong technical ownership and a high degree of autonomy. As part of our tight-knit, senior engineering team, you will enjoy substantial ownership and autonomy, making a direct impact on our product. You will have a concrete influence over backend architecture, technical direction, and tooling decisions while maintaining alignment with product and business objectives. This position does not include people management responsibilities or legacy system ownership; it is solely focused on developing, scaling, and enhancing modern backend services. About Inflect Inflect is at the forefront of building and operating an innovative IT infrastructure marketplace, seamlessly connecting buyers and service providers through a single, product-driven platform. We are not just a software house or agency. We navigate complex marketplace workflows at the intersection of cloud infrastructure, network services, and large-scale computing (CPU/GPU). Our marketplace integrates directly with service providers, allowing buyers to discover, compare, and transact infrastructure services effortlessly. Our engineering culture prioritizes pragmatism, ownership, and rapid feedback, focusing on delivering tangible business value rather than adhering to rigid processes or excessive formalities. Work Environment Standard working hours align with the Polish (CET) time zone, with regular collaboration with engineers and stakeholders based in the United States. We prefer a hybrid work model, with 1–2 days in our Warsaw office each week. Daily communication in English with US-based engineers and partners. Close collaboration with Product, Backend, and Infrastructure-focused teammates. Your Responsibilities Assume technical ownership of critical backend services that power Inflect’s marketplace and service provider integrations. Design, implement, and scale backend systems that support the onboarding and integration of new service provider groups. Collaborate closely with Product and Engineering leadership to translate marketplace and integration requirements into practical, production-ready technical solutions. Engage in ongoing evaluation and improvement of backend systems to enhance performance and reliability.

Join our client, a pioneer in digital identity and fraud prevention solutions, serving banks, fintech firms, online marketplaces, and other regulated industries globally. Their innovative products harmoniously blend biometric identity verification, document and image processing, and sophisticated fraud detection techniques, empowering clients to deliver smooth digital experiences while upholding robust security measures and compliance with regulations. The company harnesses the power of AI, machine learning, and computer vision to enhance identity verification, mobile deposit, and liveness detection solutions utilized by thousands of organizations worldwide.About the RoleWe are in search of a Senior Java Backend Engineer to become a crucial member of our cross-functional team dedicated to developing cloud-native identity and fraud prevention products on AWS. In this pivotal position, you will architect and implement scalable, high-performance backend services and APIs in Java, operating within a microservices and serverless architecture. You will engage in close collaboration with product managers, front-end engineers, researchers, and DevOps specialists to deliver production-ready features that enable real-time identity verification and extensive fraud detection.What You Will DoDesign, develop, deploy, and maintain production-ready backend APIs and microservices in Java, primarily utilizing AWS as the deployment platform.Construct scalable and resilient services leveraging serverless and containerized architectures (ECS, Lambda, API Gateway).Write clean, efficient, and testable code, emphasizing quality engineering and continuous delivery.Design and execute robust automated test suites, including unit, integration, and performance tests.Collaborate with product managers, front-end engineers, QA, and cloud operations teams to translate requirements into well-crafted features.Contribute to the development of CI/CD pipelines and advocate for DevOps best practices to ensure rapid and reliable deployments.Create and maintain both internal software and public API documentation.Participate in Agile ceremonies such as stand-ups, sprint planning, refinements, and retrospectives.Mentor and support junior team members, sharing knowledge to elevate team capabilities.

Join Attio: Pioneering the Future of CRM in the AI EraAt Attio, we are on a transformative mission to revolutionize Customer Relationship Management (CRM) for the age of artificial intelligence. Our goal is to create the first AI-native CRM solution tailored for the most ambitious go-to-market teams. Recently, we secured a $52M Series B funding led by GV (Google Ventures), alongside support from Redpoint, Balderton, Point Nine, and 01A. Our passionate team is dedicated to overcoming complex technical challenges, delighting users, and setting new industry benchmarks.About the RoleOur Engineering team is focused on tackling the most challenging problems so our users can thrive. We build real-time infrastructure, AI-native architecture, and a seamless frontend experience, all powered by a team that operates swiftly, thinks critically, and maintains exceptionally high standards for quality.We are seeking a Senior Product Engineer who is passionate about pushing boundaries, meticulous about details, and eager to help reshape how millions of individuals work.

About Zowie:At Zowie, we are transforming the way businesses engage with their customers. Our vision is to create a future where AI Agents manage 100% of customer interactions, offering instant, tailored, and outstanding experiences.We recognize that AI Agents herald the next significant technological advancement, and Zowie is at the forefront of this evolution. Trusted by leading consumer brands such as Costco, DocMorris, Monos, Decathlon, and InPost, our AI Agents are already handling millions of conversations monthly in customer care.About the Role:As we see great enterprises harnessing our GenAI-powered platform to unlock substantial wins, we are committed to investing in the next wave of innovation—focusing on increased impact, seamless integrations, and expedited time-to-value. To support this initiative, we are expanding our engineering team and seeking dedicated Scala Engineers who are eager to work at the cutting edge of GenAI and contribute to the development of groundbreaking products.In this position, you will lay the groundwork that supports our AI Agents at scale, designing systems with a focus on reliability, performance, and adaptability. Interested in the technology you'll be working with? Explore our tutorials for a glimpse of our platform or see it in action here.An essential aspect of our culture is being an AI-native engineering organization. Here, you are not just permitted but expected to utilize modern AI tools in your daily tasks. The software engineering landscape is rapidly evolving with new AI tools, and we are at the forefront of this change. You will actively advance this frontier by leveraging AI for design exploration, code scaffolding, test generation, and decision documentation, all while adhering to strong engineering principles—such as clear contracts, readable code, robust test suites, observability, and maintainable architectures. This is not about haphazard coding; it's disciplined engineering, accelerated.If this vision excites you and you are already integrating AI into your coding practices, we would love to speak with you.

Join our dynamic development team as an experienced Backend Engineer, where you will play a crucial role in building large-scale event-driven systems. We are collaborating with a forward-thinking integrated shipping services company, known for their innovative approach to global logistics. They maintain a smart and efficient worldwide network, providing reliable shipping services that ensure stable operations for customers globally. Your primary responsibilities will include designing and constructing event-driven solutions utilizing Kafka and related technologies, with a strong emphasis on stream processing applications, data pipelines, and monitoring solutions built with the ELK stack.

About Sezzle: At Sezzle, we are dedicated to empowering the next generation financially. Our innovative approach is redefining the shopping experience by combining state-of-the-art technology with flexible, interest-free installment plans, making shopping more intelligent and accessible. We are not only changing the payment landscape but are also transforming how customers discover, engage with, and acquire their favorite products, significantly boosting merchant sales through enhanced conversions and elevated order values. Join us in shaping the future of fintech and retail as we build a forward-thinking team that is passionate about creating a unique shopping experience rather than just a transaction. If you are eager to break new ground in technology and provide a transformative experience for both consumers and merchants, we invite you to be part of Sezzle's journey in revolutionizing shopping! About the Role: We are on the lookout for a highly skilled and driven Senior Software Engineer who embodies both intelligence and emotional insight. This role offers an exhilarating chance to excel in a fast-paced environment within a rapidly expanding team, with extensive opportunities for career progression.As a Senior Software Engineer at Sezzle, you will collaborate with a motivated team to solve engaging and complex challenges across various organizational domains. Your expertise will not only propel your own growth but also elevate the skills of your colleagues. In this backend-centric position, you will closely interact with stakeholders from Product, Support, and the broader business. Additionally, you will collaborate with other engineering teams to deliver high-quality, scalable, and innovative solutions that address both internal and customer challenges. Daily tasks will include designing, developing, and deploying new features, as well as mentoring and unblocking your teammates. Your contributions will have a profound impact on the daily operations of your peers at Sezzle, enhancing their capacity to support our business and customers, while also allowing for iterative feedback and improvement. Interview Process At Sezzle, we prioritize transparency. We regularly provide feedback and set expectations throughout our interview process, as we believe this is essential to our culture. Progression through each stage is not guaranteed.

Join Our Team at HSP GroupHSP Group stands at the forefront of global expansion services, dedicated to simplifying the complexities of international operations. We offer a comprehensive suite of solutions in legal entity setup, global HR, payroll, compliance, tax, and advisory, empowering our clients to scale efficiently while minimizing risks.As a pioneering startup in the dynamic field of global expansion management, we pride ourselves on our commitment to innovation, delivery excellence, and customer satisfaction. You will be an integral part of our small yet highly skilled team, contributing directly to our success.About Gateway HRGateway HR is our specialized HRIS platform tailored for global expansion management, featuring seamless integration with our flagship Gateway GXM platform. This enables functionalities such as automated payslip generation, smart contract management, and effortless cross-border compliance.Our ecosystem already incorporates AI-driven document recognition and serverless architecture on Azure, alongside a diverse range of integrated tools for HR, entity management, and compliance.Your RoleThis is a fully remote role. We are seeking a Lead Backend Engineer to spearhead the technical vision for Gateway HR and enhance its integration with GXM. You will engage in hands-on platform development while leading external development teams—refining the architecture, innovating new features, and upholding HSP's engineering standards across the codebase.This position is not solely managerial; you will actively code, review pull requests, challenge architectural choices, and launch features while setting high standards for the team.

Join HelloFresh in Warsaw as part of the HelloTech organization, our global technology backbone comprising over 1,000 professionals dedicated to developing digital products that enhance our comprehensive food experience. From meal kits and ready-to-eat meals to specialized offerings such as pet food and premium meat & seafood, HelloTech builds the platforms that deliver personalized food solutions to millions of customers each month. Our subscription-based, direct-to-consumer model leverages technology at every touchpoint—from customer-facing applications and personalization algorithms to pricing, forecasting, supply chain optimization, and initiatives aimed at minimizing food waste. Though our brands function independently to cater to unique customer needs, they are unified by shared platforms, data, and operational excellence fostered by HelloTech.At HelloTech, we operate in autonomous, cross-functional teams, each responsible for a specific product or domain from inception to completion. In collaboration with our Warsaw office, you will contribute to the development of scalable, data-driven products utilized across various markets, employing a modern tech stack and working alongside international teams to continually enhance how people discover, order, and enjoy HelloFresh’s offerings, both now and into the future.

Hello! We are Bee Talents, an IT recruitment agency dedicated to assisting clients globally in establishing their technical teams since 2015. Currently, we invite you to join the recruitment process for Reef Technologies.About Reef Technologies:We are a fully remote team of senior Python backend engineers with over 5 years of experience.Our focus is on building complex distributed systems, ensuring low latency, fault tolerance, high scalability, and self-healing capabilities. We also develop APIs, databases, and libraries, diving into custom algorithm design as needed.Over the long term, we collaborate with startups globally, working on projects that range from one-off tasks to multi-year partnerships. Highlights of our work include a financial data warehouse for a London fintech, a graph search system for Norwegian auditors, and a scalable WAF for a client in Chicago.Beyond our technical endeavors, we actively shape Reef Technologies to be a desirable workplace. We co-create company policies using Sociocracy 3.0, a framework that ensures every voice is valued and rules are collaboratively established.Our primary objective at Reef Technologies is to accomplish tasks efficiently and effectively. We offer competitive rates and significant flexibility, expecting everyone to take accountability for their work and deliver promptly. We do not tolerate unresponsiveness.To ensure the best fit, we prioritize matching team members with suitable projects. You'll have substantial input in shaping your career path within the organization.Typically, we work between 30–40 hours a week, with ample flexibility in our schedules. Our team is globally distributed, with many of us working from Poland.

About UsXebia is a leading global technology firm that embarked on its journey in Central and Eastern Europe with two renowned Polish companies: PGS Software, celebrated for its premier cloud and software solutions, and GetInData, a trailblazer in Big Data analytics. Today, we are a formidable team of over 1,000 experts committed to delivering exceptional cloud, data, and software solutions, and we are just beginning our exciting journey.Our MissionWe engage in transformative projects that truly matter. From fintech and e-commerce to aviation, logistics, media, and fashion, we empower our clients to create scalable platforms, data-driven insights, and innovative applications that shape the future of technology. Our esteemed clients include industry leaders such as McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, Allegro, and InPost, among others.We prioritize intelligent technology, genuine ownership, and continuous personal and professional growth. Our work with modern, open-source stacks, combined with partnerships with Databricks, dbt, Snowflake, Azure, GCP, and AWS, underscores our commitment to excellence. Fun fact: we were the first AWS Premier Partner in Poland!Community and CultureAt Xebia, our community is what makes us unique. We actively support tech communities, host meetups (including Software Talks and Data Tech Talks), and foster a culture that emphasizes individual growth through Guilds, Labs, and dedicated personal development budgets, covering both technical and soft skills. This is more than just a job; it's a space for growth.Why Choose Us?What sets us apart is our mindset, our vibrant culture, and our exceptional people. While it's challenging to fully capture in words, we invite you to visit us and experience it for yourself.Your Role:Lead the design and delivery of intricate backend features and services, from concept to deployment and ongoing maintenance.Develop high-quality, production-ready software using Java and Spring Boot, adhering to architectural standards.Promote technical excellence by implementing best practices, clean architecture principles, and robust testing strategies.Mentor junior developers and contribute to their growth and skill enhancement.

Join SplitMetrics, a pioneering global software company that empowers mobile-first businesses with an innovative ecosystem of products and services designed to drive growth. Our offerings include:SplitMetrics Acquire: A powerful platform for automating and optimizing Apple Ads.SplitMetrics Agency: A comprehensive mobile marketing agency backed by industry experts.SplitMetrics Optimize: An award-winning A/B testing platform recognized as the ASO Tool of the Year.App Radar by SplitMetrics: An advanced ASO platform offering in-depth keyword and competitor analysis.Why Choose SplitMetrics? With nearly a decade of experience, we lead the mobile marketing industry with cutting-edge technologies.As an Apple Ads Partner, we were the first to develop a management platform for Apple Ads.Collaborate with top mobile brands globally, including Skyscanner, Glovo, Flo, Babbel, and Wooga.Our ecosystem supports over $1 billion in ad spend annually.Incorporated AI into our strategic initiatives since 2023.Enjoy a remote-first culture that fosters collaboration across 20+ countries.We are on the lookout for a talented Senior Backend Engineer (Python) to join our dynamic team.

Join our dynamic team at Renmoney as a Java Backend Developer, where you will contribute to our core engineering teams, including Banking, Loans, Core Tech Platform, and Cards. Our teams are focused on developing high-impact, backend-heavy systems that drive essential financial products and internal platforms.At Renmoney, we prioritize engineering excellence—not only in delivery speed but also in system quality and the artistry of software development. We are cultivating a collaborative engineering culture that values clear communication, thoughtful architecture, rigorous testing, and teamwork.Our tech stack includes: Java • Spring Boot • AWS (EKS) • MySQL • Kafka • Redis • Grafana • Prometheus.

Welcome to the positive side of technology! You might recognize us by our previous name: Znany Lekarz. It all began over a decade ago when we posed a crucial question: is anyone in healthcare genuinely considering the needs of patients? We took action, empowering patients with the ability to leave and read reviews about their healthcare experiences. Simultaneously, we equipped doctors with innovative tools to streamline booking management, enabling them to focus on what truly matters: patient care. Today, we invite you to join us in our mission to humanize the healthcare experience.Docplanner: A Global LeaderWe proudly operate in 13 countries, with over 90 million patients relying on our services every month. More than 300,000 specialists trust our platform, backed by leading venture capital firms like Point Nine Capital, Goldman Sachs Asset Management, and One Peak Partners. Despite employing over 2,500 individuals worldwide, we maintain the innovative spirit of a startup that we began with over a decade ago.Docplanner Tech: Shaping the FutureAt Docplanner Tech, we are a diverse team of over 400 professionals in Engineering, Data, and Product teams, dedicated to creating our product for all our locations. Many team members have been with us for over five years, and we always welcome new colleagues with warmth and enthusiasm.While we could share more about ourselves, we encourage you to check our Glassdoor reviews to hear firsthand experiences. If you want to understand what it's like to be your true self at work, watch this video.Why Join Us?It's fulfilling to share with family and friends how your work contributes to making the world a better place. You’ll rest easy knowing that your efforts matter and that your skills resonate with your values.Our goal is to enhance the healthcare experience, and this journey begins with you being authentically yourself. We believe that embracing the diversity of human experiences leads to a better healthcare journey for everyone. We don’t just acknowledge our differences; we celebrate them. We encourage you to bring your whole self to work, including the choice to work remotely, as we are fully remote-friendly.

Join our dynamic team at Lingarogroup as a Backend Developer! In this role, you will be responsible for designing, implementing, and maintaining server-side applications and databases, ensuring high performance and responsiveness to requests from the front-end. You will work closely with front-end developers to integrate user-facing elements with server-side logic.We are looking for someone who possesses a strong understanding of backend technologies, is highly motivated, and thrives in a collaborative environment.

About Zowie:At Zowie, we are at the forefront of transforming customer interactions through AI. Our vision is to create an environment where AI Agents manage all customer communications, providing instant, tailored, and outstanding service.We believe that AI Agents are poised to drive the next significant technological evolution, and Zowie is leading this movement. Major brands such as Costco, DocMorris, Monos, Decathlon, and InPost trust our AI Agents to spearhead their customer service, managing millions of interactions every month.About the Role:As our GenAI-powered platform is already being utilized by large enterprises for mission-critical applications and achieving substantial results, we're expanding our engineering team to foster greater impact, seamless integrations, and quicker value delivery. We are looking for adaptable Senior Backend Engineers eager to engage with the latest in GenAI technology and contribute to pioneering impactful solutions.In this role, you will lay the groundwork that enables our AI Agents to operate at scale, crafting systems that prioritize reliability, performance, and adaptability. Interested in the technology you'll be developing? Explore these tutorials to familiarize yourself with our platform, or see it in action here.Key Points:1. This position is tailored for software engineers who think beyond a single technology stack. You should have a strong command of at least one of the following programming languages: Java, Scala, or Python, and be open to utilizing others when appropriate.2. We operate as an AI-native engineering organization, encouraging the use of modern AI tools in your daily tasks. Software engineering is rapidly evolving with new AI technologies, and you will be at the forefront of this shift: applying AI for design exploration, code scaffolding, test generation, and decision documentation, all while maintaining rigorous engineering standards—clear contracts, readable code, robust test suites, observability, and sustainable architectures. This is disciplined engineering at an accelerated pace.

Join HelloFresh in the vibrant city of Warsaw as part of our dynamic HelloTech organization, a global technology powerhouse comprising over 1,000 talented individuals. Together, we create innovative digital solutions that elevate the culinary experience for our customers. From meal kits and convenient ready-to-eat options to specialty items such as premium meats and pet food, HelloTech is the driving force behind our mission to deliver personalized food solutions to millions each month. Our subscription-based, direct-to-consumer model is deeply rooted in technology, ensuring excellence at every stage—from customer-facing applications and personalized experiences to robust pricing strategies, accurate forecasting, and optimized supply chains. Despite our brands catering to unique customer needs, we thrive on shared platforms, data, and operational excellence driven by HelloTech. At HelloTech, we operate through autonomous, cross-functional alliances, each responsible for specific products or domains. By collaborating within our Warsaw office, you will contribute to the development of scalable, data-driven products that enhance the way customers discover, order, and enjoy HelloFresh offerings, now and in the future.