Backend Engineer

🏢 Summary: Backend Engineer role focused on designing and building scalable, secure, and high-performance backend systems for financial products. The position involves greenfield development, building REST APIs and microservices, and evolving critical systems such as payments, treasury, and crypto liquidity. The role emphasizes clean code, maintainability, and modern engineering practices in a fast-paced fintech environment. 🗂️ Requirements: 5+ years Backend development experience, Fluency in Java, Experience building REST APIs, Experience with microservices architecture, Experience with relational databases, Experience with Spring Boot, Experience with TDD, Experience with CI/CD pipelines, Bachelor’s degree in Computer Science, Mathematics, Physics or related field, Proven experience building complex, high-scale products 📃 Skills: Java, Spring, SpringBoot, PostgreSQL, REST, Microservices, TDD, DDD, CI, CD, SQL 🏢 Description: Our Mission We are building what we believe will become one of the most important financial institutions in the world. That requires exceptional talent, relentless standards, and people who care deeply about the work. At ARQ, we are turning the financial system upside down — starting in the Americas. We are nimble, but ambitious. We move fast, learn fast, and innovate relentlessly. Technology is our greatest ally, and execution is our edge. We build as a team. We think long term. We aim for world-class in everything we do. If you are exceptional at what you do — and ready to help redefine finance — we’d love to meet you. Are you ready to build what comes next? About the team We believe that small teams with the best talent outcompete massive companies with mediocre capabilities. That's why we have gathered a set of people who have done it before at iconic companies like Revolut, Uber, Amazon, Block and UBS: we owned some of the most loved and profitable products, delivered top-notch transaction processing platforms, created beautiful mobile applications - and helped them become profitable companies that changed the lives of millions of people. In our quest to reshape the global financial system we have raised tens of millions of dollars from leading investors like Sequoia Capital, Founders Fund, Brevan Howard Digital, Y Combinator and Kaszek Ventures. What we're looking for As a Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money. It is a hybrid role, so we expect our teammates to go to our Krakow office 2-3 times per week. What you'll be doing The work will focus on greenfield development and improvement of existing systems Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity) Our technology stack is based predominantly on Java 25 on the backend with Postgres database We rely on Spring Boot for quick and quality delivery We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery What you'll need 3+ years of experience in Backend development, with fluency in Java Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines Quick learner with an ambitious and results driven personality, with excellent communication skills (english fluency, verbal and written) Track record of building complex products that millions of people use in hypergrowth startups. Perks: Competitive salary Own the development process that will face on the customer's impact Latest technology to work with Strong team that will help you improve your skills

🏢 Summary: Backend Engineer role focused on designing and building scalable, secure, and high-performance backend systems for financial products, including payments, treasury, transactions, and crypto liquidity. The position involves greenfield development, microservices architecture, and REST API development in a fast-paced fintech environment. The role emphasizes clean code, maintainability, and continuous delivery using modern Java technologies. 🗂️ Requirements: 5+ years of Backend development experience, Strong proficiency in Java, Experience building REST APIs, Experience developing microservices, Experience with PostgreSQL databases, Experience with Spring Boot framework, Experience with TDD and DDD, Experience with CI/CD practices, Bachelor’s degree in Computer Science, Mathematics, Physics, or Engineering, Fluency in English (written and spoken) 📃 Skills: Java, Spring, SpringBoot, PostgreSQL, REST, Microservices, TDD, DDD, CI/CD, Git 🏢 Description: Our Mission We are building what we believe will become one of the most important financial institutions in the world. That requires exceptional talent, relentless standards, and people who care deeply about the work. At ARQ, we are turning the financial system upside down — starting in the Americas. We are nimble, but ambitious. We move fast, learn fast, and innovate relentlessly. Technology is our greatest ally, and execution is our edge. We build as a team. We think long term. We aim for world-class in everything we do. If you are exceptional at what you do — and ready to help redefine finance — we’d love to meet you. Are you ready to build what comes next? About the team We believe that small teams with the best talent outcompete massive companies with mediocre capabilities. That's why we have gathered a set of people who have done it before at iconic companies like Revolut, Uber, Amazon, Block and UBS: we owned some of the most loved and profitable products, delivered top-notch transaction processing platforms, created beautiful mobile applications - and helped them become profitable companies that changed the lives of millions of people. In our quest to reshape the global financial system we have raised tens of millions of dollars from leading investors like Sequoia Capital, Founders Fund, Brevan Howard Digital, Y Combinator and Kaszek Ventures. What we're looking for As a Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money. It is a hybrid role, so we expect our teammates to go to our Krakow office 2-3 times per week. What you'll be doing The work will focus on greenfield development and improvement of existing systems Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity) Our technology stack is based predominantly on Java 25 on the backend with Postgres database We rely on Spring Boot for quick and quality delivery We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery What you'll need 5+ years of experience in Backend development, with fluency in Java Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines Quick learner with an ambitious and results driven personality, with excellent communication skills (english fluency, verbal and written) Track record of building complex products that millions of people use in hypergrowth startups. Perks: Competitive salary Own the development process that will face on the customer's impact Latest technology to work with Strong team that will help you improve your skills

🏢 Summary: Senior Android Engineer role focused on building and scaling a high-performance fintech mobile application, contributing to architecture, code quality, and end-to-end feature delivery. The position involves developing modern Android solutions and collaborating cross-functionally to deliver secure, user-centric financial products. The engineer will help evolve the Android app using best practices and modern frameworks. 🗂️ Requirements: 5+ years of experience building Android applications, Strong knowledge of Kotlin and Android ecosystem, Experience with Jetpack, Coroutines, and Compose, Understanding of MVVM, MVI, and Clean Architecture, Experience with Android testing frameworks, Ability to design and scale Android app architecture, Experience collaborating with cross-functional teams, Experience in fast-paced environments, Experience in fintech or consumer tech startups 📃 Skills: Kotlin, Android, Jetpack, Coroutines, Compose, MVVM, MVI, CleanArchitecture, Testing, Git 🏢 Description: Our Mission We are building the financial system for the next century. One where control sits in the hands of customers — not banks. Where money moves on rails that are faster, smarter, and radically more efficient. Where wealth management tools help you grow your savings for decades — and build generational wealth. Where fewer intermediaries mean more value stays where it belongs: in our customers’ pockets. We operate with long-term ambition and absolute conviction. We are not here to iterate on the past — we are here to redesign it. This is a defining moment to join us. We are building what we believe will become one of the most important financial institutions in the world. That requires exceptional talent, relentless standards, and people who care deeply about the work. At ARQ, we are turning the financial system upside down — starting in the Americas. We are nimble, but ambitious. We move fast, learn fast, and innovate relentlessly. Technology is our greatest ally, and execution is our edge. We build as a team. We think long term. We aim for world-class in everything we do. If you are exceptional at what you do — and ready to help redefine finance — we’d love to meet you. Are you ready to build what comes next? About the team We believe that small teams with the best talent outcompete massive companies with mediocre capabilities. That's why we have gathered a set of people who have done it before at iconic companies like Revolut, Uber, Amazon, Block and UBS: we owned some of the most loved and profitable products, delivered top-notch transaction processing platforms, created beautiful mobile applications - and helped them become profitable companies that changed the lives of millions of people. In our quest to reshape the global financial system we have raised tens of millions of dollars from leading investors like Sequoia Capital, Founders Fund, Brevan Howard Digital, Y Combinator and Kaszek Ventures. What We’re Looking For We’re looking for a Senior Android Engineer who’s passionate about building beautiful, reliable, and high-performance products that delight users. You’ll be a hands-on engineer, contributing high-quality code and helping raise the bar for engineering standards across the team. You’ll join our Core Product Team, helping to build and scale the ARQ experience — from our flagship Android app to new product lines like Premium, Credit, and other financial products on the roadmap. What You’ll Be Doing Design and build exceptional Android experiences that users love and trust. Write clean, maintainable, and performant Kotlin code using modern Android tools and frameworks. Collaborate closely with Product, Design, and Backend teams to deliver features end-to-end. Contribute to the architecture and evolution of the Android app as it scales. Own features from concept to launch, ensuring quality, polish, and performance. Help improve code quality, testing, and development best practices within the team. What You’ll Need 5+ years of experience building Android applications used by thousands or millions of users. Strong knowledge of Kotlin and the Android ecosystem (Jetpack, Coroutines, Compose, etc.). Solid understanding of architecture patterns (MVVM, MVI, Clean Architecture) and testing frameworks. Strong ownership mindset and attention to detail when building user-facing products. Appreciation for great UX and product quality. Experience working in fast-paced environments, ideally in fintech or consumer tech startups.

🏢 Summary: Senior Android Engineer role focused on building and scaling high-performance, user-centric financial products within a core product team. The position involves designing, developing, and evolving a flagship Android app and new fintech features using modern Android technologies. You will own features end-to-end and contribute to architecture, code quality, and engineering standards. 🗂️ Requirements: 5+ years of experience building Android applications at scale, Strong proficiency in Kotlin, Deep knowledge of Android ecosystem components, Experience with Jetpack, Coroutines, and Compose, Understanding of MVVM, MVI, and Clean Architecture, Experience with testing frameworks for Android, Ability to design scalable mobile app architecture, Experience collaborating with backend and product teams 📃 Skills: Kotlin, Android, Jetpack, Coroutines, Compose, MVVM, MVI, CleanArchitecture, Testing, Git 🏢 Description: Our Mission We are building the financial system for the next century. One where control sits in the hands of customers — not banks. Where money moves on rails that are faster, smarter, and radically more efficient. Where wealth management tools help you grow your savings for decades — and build generational wealth. Where fewer intermediaries mean more value stays where it belongs: in our customers’ pockets. We operate with long-term ambition and absolute conviction. We are not here to iterate on the past — we are here to redesign it. This is a defining moment to join us. We are building what we believe will become one of the most important financial institutions in the world. That requires exceptional talent, relentless standards, and people who care deeply about the work. At ARQ, we are turning the financial system upside down — starting in the Americas. We are nimble, but ambitious. We move fast, learn fast, and innovate relentlessly. Technology is our greatest ally, and execution is our edge. We build as a team. We think long term. We aim for world-class in everything we do. If you are exceptional at what you do — and ready to help redefine finance — we’d love to meet you. Are you ready to build what comes next? About the team We believe that small teams with the best talent outcompete massive companies with mediocre capabilities. That's why we have gathered a set of people who have done it before at iconic companies like Revolut, Uber, Amazon, Block and UBS: we owned some of the most loved and profitable products, delivered top-notch transaction processing platforms, created beautiful mobile applications - and helped them become profitable companies that changed the lives of millions of people. In our quest to reshape the global financial system we have raised tens of millions of dollars from leading investors like Sequoia Capital, Founders Fund, Brevan Howard Digital, Y Combinator and Kaszek Ventures. What We’re Looking For We’re looking for a Senior Android Engineer who’s passionate about building beautiful, reliable, and high-performance products that delight users. You’ll be a hands-on engineer, contributing high-quality code and helping raise the bar for engineering standards across the team. You’ll join our Core Product Team, helping to build and scale the ARQ experience — from our flagship Android app to new product lines like Premium, Credit, and other financial products on the roadmap. What You’ll Be Doing Design and build exceptional Android experiences that users love and trust. Write clean, maintainable, and performant Kotlin code using modern Android tools and frameworks. Collaborate closely with Product, Design, and Backend teams to deliver features end-to-end. Contribute to the architecture and evolution of the Android app as it scales. Own features from concept to launch, ensuring quality, polish, and performance. Help improve code quality, testing, and development best practices within the team. What You’ll Need 5+ years of experience building Android applications used by thousands or millions of users. Strong knowledge of Kotlin and the Android ecosystem (Jetpack, Coroutines, Compose, etc.). Solid understanding of architecture patterns (MVVM, MVI, Clean Architecture) and testing frameworks. Strong ownership mindset and attention to detail when building user-facing products. Appreciation for great UX and product quality. Experience working in fast-paced environments, ideally in fintech or consumer tech startups.

🏢 Summary: Lead iOS Software Engineer role focused on building and scaling a high-quality fintech mobile app, driving architecture, code excellence, and delivering secure, performant user experiences. The position involves hands-on development, technical leadership, and ownership of features across multiple financial products. 🗂️ Requirements: 6+ years of professional iOS development experience, Strong proficiency in Swift, Experience with UIKit, SwiftUI, and Combine, Knowledge of MVVM and Clean Architecture, Experience with testing practices in iOS, Experience building complex, high-scale consumer applications, Ability to design scalable and secure mobile architectures, Experience with full feature lifecycle from design to deployment 📃 Skills: Swift, iOS, UIKit, SwiftUI, Combine, MVVM, CleanArchitecture, Xcode, Git, Testing, CI/CD 🏢 Description: Our Mission We are building the financial system for the next century. One where control sits in the hands of customers — not banks. Where money moves on rails that are faster, smarter, and radically more efficient. Where wealth management tools help you grow your savings for decades — and build generational wealth. Where fewer intermediaries mean more value stays where it belongs: in our customers’ pockets. We operate with long-term ambition and absolute conviction. We are not here to iterate on the past — we are here to redesign it. This is a defining moment to join us. We are building what we believe will become one of the most important financial institutions in the world. That requires exceptional talent, relentless standards, and people who care deeply about the work. At ARQ, we are turning the financial system upside down — starting in the Americas. We are nimble, but ambitious. We move fast, learn fast, and innovate relentlessly. Technology is our greatest ally, and execution is our edge. We build as a team. We think long term. We aim for world-class in everything we do. If you are exceptional at what you do — and ready to help redefine finance — we’d love to meet you. Are you ready to build what comes next? About the team We believe that small teams with the best talent outcompete massive companies with mediocre capabilities. That's why we have gathered a set of people who have done it before at iconic companies like Revolut, Uber, Amazon, Block and UBS: we owned some of the most loved and profitable products, delivered top-notch transaction processing platforms, created beautiful mobile applications - and helped them become profitable companies that changed the lives of millions of people. In our quest to reshape the global financial system we have raised tens of millions of dollars from leading investors like Sequoia Capital, Founders Fund, Brevan Howard Digital, Y Combinator and Kaszek Ventures. What We’re Looking For We’re looking for a Lead iOS Software Engineer who is a world-class hands-on builder. You’ll set the bar for engineering excellence, lead by example through code reviews and architecture design, and inspire a growing mobile team to deliver elegant, reliable, and beautiful experiences that define what financial products should feel like. This is a high-impact role on our Core Product Team , where you’ll help build and scale the ARQ experience - from our flagship app to new initiatives such as Premium , Credit , and other innovative financial products in the pipeline. What You’ll Be Doing Be the hands-on technical expert for all things iOS - writing world-class code, performing code reviews, and ensuring technical excellence across the app. Collaborate with Product and Design to craft pixel-perfect user experiences with exceptional attention to detail, performance, and reliability. Architect, build, and maintain scalable mobile features that are secure, fast, and delightful to use. Review code, share insights, and elevate the quality of engineering across the app. Drive the evolution of our mobile architecture to support a multi-product environment (Premium, Credit, and more). Collaborate closely with cross-functional teams to ship quickly while maintaining uncompromising quality. Own the full lifecycle of your features - from design and implementation to testing and deployment. What You’ll Need 6+ years of professional experience in iOS development, ideally building complex, high-scale consumer products. Proven expertise in Swift and Apple’s iOS ecosystem (UIKit, SwiftUI, Combine, etc.). Strong understanding of design patterns, architecture (MVVM, Clean Architecture), and testing practices. Deep passion for UI/UX craftsmanship - you care deeply about the small details that make products amazing. Proven ability to deliver outstanding products end-to-end in fast-moving, high-growth environments. Bonus: Experience in fintech , payments , or digital banking .

🏢 Summary: Lead iOS Software Engineer role focused on building and scaling a high-quality fintech mobile application. The position involves hands-on iOS development, architectural leadership, and delivering secure, performant, and pixel-perfect user experiences across multiple financial products. You will own features end-to-end and drive engineering excellence within the mobile team. 🗂️ Requirements: 6+ years of professional iOS development experience, Proven expertise in Swift, Strong knowledge of UIKit, SwiftUI, Combine, Experience with MVVM and Clean Architecture, Experience with testing practices in iOS, Ability to design scalable mobile architectures, Experience building complex, high-scale consumer applications 📃 Skills: Swift, iOS, UIKit, SwiftUI, Combine, MVVM, CleanArchitecture, Xcode, CI/CD, Git, Testing, REST 🏢 Description: Our Mission We are building the financial system for the next century. One where control sits in the hands of customers — not banks. Where money moves on rails that are faster, smarter, and radically more efficient. Where wealth management tools help you grow your savings for decades — and build generational wealth. Where fewer intermediaries mean more value stays where it belongs: in our customers’ pockets. We operate with long-term ambition and absolute conviction. We are not here to iterate on the past — we are here to redesign it. This is a defining moment to join us. We are building what we believe will become one of the most important financial institutions in the world. That requires exceptional talent, relentless standards, and people who care deeply about the work. At ARQ, we are turning the financial system upside down — starting in the Americas. We are nimble, but ambitious. We move fast, learn fast, and innovate relentlessly. Technology is our greatest ally, and execution is our edge. We build as a team. We think long term. We aim for world-class in everything we do. If you are exceptional at what you do — and ready to help redefine finance — we’d love to meet you. Are you ready to build what comes next? About the team We believe that small teams with the best talent outcompete massive companies with mediocre capabilities. That's why we have gathered a set of people who have done it before at iconic companies like Revolut, Uber, Amazon, Block and UBS: we owned some of the most loved and profitable products, delivered top-notch transaction processing platforms, created beautiful mobile applications - and helped them become profitable companies that changed the lives of millions of people. In our quest to reshape the global financial system we have raised tens of millions of dollars from leading investors like Sequoia Capital, Founders Fund, Brevan Howard Digital, Y Combinator and Kaszek Ventures. What We’re Looking For We’re looking for a Lead iOS Software Engineer who is a world-class hands-on builder. You’ll set the bar for engineering excellence, lead by example through code reviews and architecture design, and inspire a growing mobile team to deliver elegant, reliable, and beautiful experiences that define what financial products should feel like. This is a high-impact role on our Core Product Team , where you’ll help build and scale the ARQ experience - from our flagship app to new initiatives such as Premium , Credit , and other innovative financial products in the pipeline. What You’ll Be Doing Be the hands-on technical expert for all things iOS - writing world-class code, performing code reviews, and ensuring technical excellence across the app. Collaborate with Product and Design to craft pixel-perfect user experiences with exceptional attention to detail, performance, and reliability. Architect, build, and maintain scalable mobile features that are secure, fast, and delightful to use. Review code, share insights, and elevate the quality of engineering across the app. Drive the evolution of our mobile architecture to support a multi-product environment (Premium, Credit, and more). Collaborate closely with cross-functional teams to ship quickly while maintaining uncompromising quality. Own the full lifecycle of your features - from design and implementation to testing and deployment. What You’ll Need 6+ years of professional experience in iOS development, ideally building complex, high-scale consumer products. Proven expertise in Swift and Apple’s iOS ecosystem (UIKit, SwiftUI, Combine, etc.). Strong understanding of design patterns, architecture (MVVM, Clean Architecture), and testing practices. Deep passion for UI/UX craftsmanship - you care deeply about the small details that make products amazing. Proven ability to deliver outstanding products end-to-end in fast-moving, high-growth environments. Bonus: Experience in fintech , payments , or digital banking .

🏢 Summary: Mid-level Backend Engineer role focused on building a cutting-edge FinTech platform for interbank intraday lending using Scala in an agile startup environment. The position involves delivering scalable, testable solutions through functional programming and TDD practices. The engineer will collaborate closely with the product team to incrementally develop and enhance the platform. 🗂️ Requirements: 3+ years of software development experience, Proficiency in Scala or similar language (e.g., Haskell), Understanding of reactive programming paradigms, Understanding of functional programming paradigms, Experience working in Agile environment, Experience working within Scrum framework, Ability to write testable, deployable and scalable code 📃 Skills: Scala, Haskell, Reactive, Functional, TDD, Scrum, Agile, Blockchain, DLT 🏢 Description: Are you a passionate backend engineer ready to take your skills to the next level? Join our Product Team as we build a cutting-edge FinTech platform for interbank intraday lending. This is your chance to be part of a dynamic, VC-backed startup and play a key role in shaping both our product and our company. Why Join Us? Fast-Paced Startup : Collaborate with a smart, agile team led by our hands-on technical co-founder. Your contributions will have a direct impact on our growth. Remote-First with a Weekly Anchor: Work remotely four days a week, and meet up with the team once a week at our Wrocław office to sync, collaborate in person, and keep the momentum going. Ownership : Receive equity options and be a true stakeholder in our success. Flexibility : Take advantage of a holiday schedule that isn’t tied to any specific country. Inspiring Team Off-Sites : Twice a year, we bring the entire team together for week-long off-sites in exciting locations (think Budapest, Bordeaux, Malta, and beyond). Modern AI-Augmented Workflow: We use Claude Code daily and invest in tooling that lets our engineers focus on the interesting problems. What You’ll Do Collaborate with our team to deliver incremental value through agile, systematic development cycles. Write clean, reusable, and efficient functional code using Scala , following TDD and engaging in pair-programming as needed. Ensure our solutions are testable, deployable , and scalable . Who You Are We’re looking for a proactive, mid-level backend engineer with: 3+ years of software development experience . Proficiency in Scala , or similar languages (e.g., Haskell ). A solid understanding of reactive and/or functional programming paradigms . Knowledge of Agile principles and experience working within the Scrum framework . (Nice-to-have) Experience using AI coding assistants effectively in a professional setting — knowing how to prompt well, scope tasks, and review AI-generated code critically. (Nice-to-have) An interest in or experience with blockchain/DLT technologies . (Bonus) A degree in Computer Science or a related field. About Us We are a forward-thinking FinTech startup backed by leading venture capital. Our mission is to revolutionize interbank lending through innovative technology. Agile principles guide our work, and we are committed to fostering a supportive, growth-oriented culture. If you’re excited about solving complex challenges, making an impact, and working in an environment that values both technical excellence and collaboration, we want to hear from you! Ready to Join? Apply now and start shaping the future of finance with us.

🏢 Summary: Senior Java Backend Engineer role focused on building ultra-low-latency trading systems for equities, FX, and other asset classes at a top North American bank. The position involves developing high-performance backend services for algorithmic order management and order routing in a fully remote setup for Poland-based engineers. Candidates will work directly with trading and product teams on actively developed greenfield and semi-greenfield capital markets systems. 🗂️ Requirements: Current Java programming experience, Strong understanding of algorithms, complexity, multi-threading, and Java standard libraries, Good knowledge of Java collections framework and data structures, Experience building backend services for front-office trading systems, Understanding of front-office workflows and electronic trading platforms, Experience with algorithmic order management systems or order routing systems, Expertise in multi-threading, event-driven systems, and performance tuning, Knowledge of low-latency trading systems, Ability to design maintainable high-quality solutions, Strong communication skills, English proficiency, Ability to work with 6-hour overlap with US Eastern business hours, Residency and work authorization in Poland 📃 Skills: Java, Algorithms, Multithreading, Collections, Trading, Low-latency, Performance, Backend, Order-routing, OMS, FX, Equities, Microservices, Databases, Time-series 🏢 Description: Want to work on trading systems at a top N. American Bank This isn’t just another dev role. It’s your chance to engineer the core of global trading. We’re talking ultra-low-latency architectures, real-time market data, and automation at scale — all in an environment where milliseconds matter and billions move. You’ll work on greenfield and semi-greenfield projects, building trading systems for equities, options, FX (forex), and more. If you thrive on complexity, love solving performance challenges under pressure, and want to collaborate directly with traders and product teams at the sharp edge of financial technology, this is your arena. The Role at a Glance Senior Java Backend Engineer Building trading systems, including high-performance backend services for algorithmic order management and order routing (multiple projects & various asset classes) Fully remote for a top N. American bank (for residents of Poland only) Part of the core team - this is not a legacy support role or an outsourced B team This role requires experience building trading systems, ideally with order routing or algorithmic order management. Some capital markets experience is required. If you enjoy working on low-latency, high-throughput trading systems, join us and build the next generation of high-performance capital markets solutions. Why Join Us? Work on a large-scale, low-latency trading system . No Legacy: Join an actively developed system — the engineers who built it originally are still on the team. Collaborate with a world-class team of developers across North America and Europe. Enjoy the stability of a long-term, fully remote role that only a bank can offer. A successful candidate will be a very strong programmer with current Java development experience. They must also be curious, open-minded, and desire to learn new things. English proficiency is a must. This role is for developers who excel at programming core Java from the ground up, not just integrating frameworks or APIs. If you’re fascinated by understanding systems ‘under the hood,’ this role is for you. Successful candidates enjoy geeking out about data structures and debugging application performance issues. This is a fully remote backend Java development role for a developer in Poland . You will be working through a Polish company that will provide the support and administrative assistance to make you successful in the role. We are looking for people to join the team long-term. Only open to residents of Poland. Polish citizens, as well as legal residents with permission to work in Poland, are welcome. What we offer Work that matters in the financial domain: You’ll be building a high-performance trading system at an established financial institution. Professional growth: Collaborate with smart, highly capable developers in a supportive and challenging environment. Direct collaboration : You will work directly with the client team in North America and in Poland. 1st-tier work : This is not a technical support or legacy maintenance role. The system is functional and is actively being built and you will take part in updating it. The people who built the system are still part of the team. Long-term commitment: This is not a fixed-scope or fixed-term outsourcing role; we value people who want to grow and contribute long-term. Flexibility & remote work: Fully remote position based in Poland with increasing schedule flexibility post-onboarding. Competitive Compensation: Top pay and ample time-off options. Responsibilities Design and implement robust software solutions for equities and FX trading systems using core Java. Build high-performance backend services that algorithmically manage and route orders. Create thorough test cases to ensure software stability and reliability. Collaborate with operations teams regarding building new features and improving existing functionality. Requirements Must have Current Java programming experience, with a strong understanding of programming concepts, including algorithms, complexity, and multi-threading, and Java’s language capabilities and standard libraries. Good knowledge of the data structures: familiarity with the Java collections framework, depth of understanding of the commonly used data structures, intuition on what to use when. Proven experience building backend services for front-office trading systems. Deep understanding of front-office workflows and electronic trading platforms (any asset class). Built or contributed to the algorithmic order management systems or order routing systems (any asset class). Expertise in multi-threading, event-driven systems, and performance tuning. Ability to break down complex workflows into maintainable, high-quality solutions. Strong communication skills and comfort working in high-stakes, trader-facing environments. Knowledge that is required for building low-latency (measured in microseconds) trading systems. Ability to align your work with a 6-hour overlap with US Eastern business hours. Nice to have Exposure to time-series databases and market data integration. Familiarity with algorithmic workflows and pricing engines. A computer science degree from a top Polish school. The recruitment process Submit your CV. Answer a few written questions and a short programming exercise which you can do at your own pace. Participate in a three-stage interview process: Written screen Technical screen interview Three technical interviews with future team members Discuss your experience and skills. Solve verbal algorithm problems (focus on clarity and understanding). Tackle live coding challenges (no trick questions). No take-home assignments – we respect your time. Successful candidates will need to pass a standard background check.

🏢 Summary: Backend Engineer role focused on building an API-first, event-driven payments platform based on Java microservices running on AWS and Kubernetes. The position covers full lifecycle development, including design, implementation, and production deployment of scalable, secure, and high-performance payment services. The platform emphasizes strong contracts, Kafka-based event streaming, and robust PostgreSQL persistence. 🗂️ Requirements: Minimum 6 years backend development experience, Strong experience building Java microservices, Experience in payments engineering (transaction lifecycle, settlement, reconciliation), Solid understanding of event-driven architecture and Kafka, Knowledge of reactive patterns, at-least-once delivery, idempotency, Strong experience with relational databases and PostgreSQL, Experience with SQL, data modeling, migrations, query optimization, Hands-on experience with Kubernetes and AWS, Experience with CI/CD and GitOps, Experience with API Gateway (routing, versioning, authentication, rate limiting) 📃 Skills: Java, Kafka, PostgreSQL, AWS, Kubernetes, SQL, Flyway, Terraform, GitLab, FluxCD, OpenAPI, XRay, CloudWatch, OpenTelemetry, Python 🏢 Description: About the Company Autopay Global is the newest member of the Autopay family — a project created to bring our advanced payment integration and payment data technologies to international markets. We build solutions that connect with local PSPs, support multi-currency flows, and ensure compliance with regional regulations. We think boldly, act responsibly, and believe that the best ideas arise where creativity meets modern technology. If you want to shape the future of payment products and have a real influence on technical decisions — join us. About the role As a Backend Engineer, you will contribute to building the Autopay Payments Platform as a fully API‑first product- including Merchant APIs, PSP/Rail APIs, event streams, and microservices running on Kubernetes/AWS. We focus on event‑driven architecture, strong contracts, determinism, idempotency, and interoperability. Our ambition is to make the platform Agentic‑Ready: secure, predictable, high‑performance, and optimized for automation at scale. This is a hands‑on role that spans design, development, and production deployment. You will work across a broad engineering stack. Your day‑to‑day responsibilities will include: designing, coding, testing, and shipping Java microservices — domain logic, workflows/state machines, adapters, and stream processors powering payment flows, using contract‑first development (OpenAPI) to build a versioned, API‑first service layer compatible with an API Gateway, creating agentic‑ready endpoints — asynchronous where applicable, highly performant, and robust, implementing event‑driven architecture with Kafka: topic design, message contracts, retries/DLQs, ordering, idempotent consumers, and replay handling, building PostgreSQL persistence: schema design, migrations, constraints, indexing, tuning, and high‑volume data integrity, deploying and operating services on AWS + Kubernetes, provisioning with Terraform and delivering through CI/CD, implementing observability by default — metrics, logs, traces, dashboards, and alerting integrated with AWS‑centric monitoring. What tools will you be working with? Technology: Java, Kubernetes, Kafka, PostgreSQL, AWS Nice to have: knowledge of Python and tooling, experience with observabiloty platforms (Dynatrance, Datadog, New Relic), understanding of Terraform and IaC solutions, Familiarity with Mulesoft Anypoint Platform If any technical concepts are unfamiliar to you, don’t worry. We’ll be happy to help and teach you everything you need. Requirements and skills we are looking for in a person hired for this role: at least 6 years of experience as a backend developer, exposure to payments engineering - transaction lifecycle, settlement, reconciliation, strong backend engineering trackt record building microservices in Java, solid understanding of event-driven architecture (Kafka, queues, topics), reactive patterns, at-least-once delivery and indempontency, fluency in relational databases (ideally PostgreSQL), data modelling, SQL, migrations (preferably Flyway) and query optimization, hands-on experience deploying, running and troubleshooting applications in Kubernetes (preferbaly EKS) and AWS tools (X-Ray, CloudWatch, Open/Telemetry), familiarity with GitOps and CI/CD (GitLab CI/CD, Flux CD), API Gateway experience - routing, policies, versioning, authentication, rate limiting, proven experience working in Scrum teams, growth mindset and willingness to adopt new technologies (e.g.GenAI-assisted coding), strong communication and collaboration skills. What we are offer? being a part of fast-growing global fintech, opportunities to work with cutting-edge tools and technologies, flexible working model with international exposure, supportive work environement, strong team culture, no dress code. Join us and let's head together where no one has gone before !

🏢 Summary: Backend Engineer role focused on building and modernising a global payments platform using Java and microservices architecture. The position involves developing reliable backend services and creating robust test automation frameworks to ensure high-quality, scalable payment processing. The role supports migration from legacy systems to API-driven, microservices-based solutions in an Agile/DevOps environment. 🗂️ Requirements: Strong experience with Java 11+, Hands-on experience in software testing and automation frameworks, Understanding of REST APIs, Knowledge of microservices architecture, Experience with Git, Experience with Unix/Linux environments, Experience with SQL databases, Experience with Spring and Spring Boot 📃 Skills: Java, Spring, SpringBoot, SQL, Oracle, Git, Unix, Linux, REST, Microservices, Automation, Testing 🏢 Description: Build the platform that moves money around the world We’re looking for a Backend Engineer with strong Java and test automation experience to join the team behind a global payments platform that enables businesses and customers to move money quickly, securely, and globally . The platform powers international payments that help organisations pay suppliers, process salaries, transfer funds, and pay taxes directly to authorities through multiple channels. You’ll play a key role in modernising payment systems , building high-quality microservices , and developing automation frameworks that ensure reliability at scale . As part of the engineering team, you’ll help design and build reliable payment services used globally. You will: Develop and maintain backend services and microservices in Java (11/17/21) Design and implement robust test automation frameworks to ensure high-quality software delivery Support the modernisation of legacy systems , migrating towards API and microservices-based architecture Improve system efficiency by increasing Straight-Through Processing (STP) capabilities Collaborate closely with engineers, testers, and stakeholders in an Agile/DevOps environment Contribute to scalable, resilient solutions powering global payment flows Must-have experience Strong development experience with Java 11+ (Java 17+ preferred) Hands-on experience in software testing and building automation frameworks Solid understanding of RESTful APIs and microservices architecture Experience working with Git for version control Comfortable working in Unix/Linux environments and command-line tools Experience with databases and SQL (Oracle preferred) Experience with Spring / Spring Boot Nice to have Experience with Test-Driven Development (TDD) Knowledge of scripting languages such as Python or Bash Experience working within a QA or testing-focused team Understanding of application monitoring and observability tools The role has a Hybrid model : candidates form Cracow 6x per month, outside of Cracow 3 - 5 x per month, from Warsaw 6x per month