Java Backend Developer Jobs

Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more. About The Team The Service Stability Engineering Team envisions service stability as one of the core competitive strengths of the company's products. By building end-to-end, link-level risk management capabilities, the team aims to achieve sustainable automatic identification and analysis of stability risks, transforming from "reactive governance" to "proactive governance." This approach shifts more stability-related matters forward and addresses them early, preventing issues before they arise and enhancing user experience. What You’ll Be Doing Oversee non-functional aspects of relevant business lines, closely collaborate with business units to ensure service stability. Based on data analysis, identify stability risks throughout the entire chain, detect unreasonable architectural designs in advance, uncover root causes of issues, and systematically address problems; Explore new technologies, tools, and architectural patterns, and promote the implementation of best practices in application architecture. What We Look For In You Bachelor's degree or higher in Computer Science or a related field, with o

This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. As a Java Developer You'll have the opportunity to: - Work in a platform which process tens of millions payments per day - Be involved in solutions to provide payments solution to the world's leading companies such as: Meta, Uber, IFood, 99app, Magalu, Spotify and many more - Integrate to mostly used payment methods in the world, ex.: Visa and Mastercard, but not limiting to those What you’ll do Build the global payments engine of the future and ensure that Adyen customers remain at the forefront of innovation. Take ownership of systems, features, or frameworks—ranging from medium complexity to large-scale initiatives—ensuring timely delivery, quality, and alignment with project goals. Collaborate effectively with your team and across teams, helping to unblock challenges and mentoring less experienced engineers. For larger systems, you’ll lead discussions and guide others through the development lifecycle. Design and implement elegant, scalable solutions to complex problems, balancing simplicity with performance. Your work will align with team objectives while minimizing operational overhead and setting new standards where applicable. Proactively identify opportunities for improvement, including addressing technical debt. Depending on scope, you may lead or contribute to cross-team initiatives to elevate the overall quality and reli

This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an environment with opportunities for our people to succeed, backed by the culture and support to ensure they are enabled to truly own their careers. We are motivated individuals who tackle unique technical challenges at scale and solve them as a team. Together, we deliver innovative and ethical solutions that help businesses achieve their ambitions faster. As a Senior Java Developer in Payments You'll have the opportunity to: Work in a platform which process tens of millions payments per day Be involved in solutions to provide payments solution to the world's leading companies such as: Facebook, Uber, Spotify, Dafiti, 99Taxis, Rappi and many more Integrate to mostly used payment methods in the world, ex.: Visa and Mastercard, but not limiting to those What you’ll do: Design, implement, test and monitor new features Identify and improve parts of the platform to make it more robust and scalable Collaborate across teams and time zones to make things happen, review code and be open to feedback Communicating with stakeholders and merchants and monitoring the impact of new features Who you are: High skilled with Java. Familiar with complex and high performance platform. Able to coach and train other developers. Someone with these skills: eye for detail, taking ownership, flexible and a team player. Able to communicate in English and Portuguese (Both fluent). This role is based out of our Sao Jose dos Campos office (3 days in person). Our Diversity, Equity and Inclusion commitments Our unique approach is a product of our diverse perspectives. This diversity of backgrounds and cultures is essential in helping us maintain our momentum. Our business and technical challenges are unique, an

Forward is transforming how the world’s most complex networks are managed and secured. Founded in 2013 by four Stanford Ph.D.s, we built the industry’s first network digital twin — a mathematically precise model of the production network that gives IT teams unmatched visibility, verification, and agility across every major cloud and vendor environment. Our customers include global leaders such as Goldman Sachs, PayPal, S&P Global, IBM, and Dell, as well as fast-growing enterprises and government agencies. According to IDC, Forward customers realize an average of $14.2 million in annual benefits through improved efficiency and security. Backed by world-class investors including Andreessen Horowitz, Goldman Sachs, MSD Partners, and Threshold Ventures, Forward offers a people-centric, innovative culture where brilliant minds are shaping the future of network reliability, security, and AI-ready operations. Forward is currently seeking experienced Java developers to work as part of our Network team. Responsibilities Help bring the best ideas from the software development world into the networking industry. Contribute to our code base, systems and software architecture as a member of our engineering team. Help create and optimize network device models for different device vendors and protocols. Help create infrastructure needed to configure, collect and test network devices. Work with peers who are experts in Networking, Distributed Systems, Big Data and Search. Requirements 5+ years of work experience in software development 3+ years of work experience with Java BS in Computer Science or related degree Solid software engineering experience with large code bases Basic understanding of networking and TCP/IP. Strong verbal and written communication skills. Nice to haves Working knowledge of how switches, routers, firewalls or load balancers work. Experience working with networking protocols such as BGP/OSPF/IS-IS, IPv4/IPv6, MPLS, VLAN, VXLAN, etc. This position is a re

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. Our India Global Capability Center isn't just supporting global operations—we’re leading global innovation. After scaling rapidly into a best-in-class hub, we deliver the product innovation and enterprise capabilities that accelerate our global growth, profitability, and scale. As we expand Smartsheet India, we’re searching for Senior Software Engineers who crave variety and ownership. Whether your expertise is in front-end, back-end, test automation, ops, or infrastructure, you’ll have the opportunity to work across multiple teams and disciplines, building a versatile skillset while solving the complex challenges of a global platform. You Will: Work on all areas of the software from front end, back end, cloud infrastructure and test automation. Drive high standards within the team for all internal services and open source tooling/libraries we maintain. Deploy service and infrastructure changes frequently in a lean agile environment using full CI/CD. Contribute in all aspects of product development: idea generation, customer engagement, planning, design, prototyping, execution, shipping, and operational excellence. Collaborate with a team of passionate, engaged engineers, and with cross-functional teams that include product managers, UX designers, UX researchers, and more. Actively mentor more junior engineers, showing how to balance customer delivery while holding high coding, service, and cloud infrastructure standards. Apply different approaches to problem solving and help validate your ideas and those of

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. Smartsheet is a tech company with a human story to tell. We’re here to empower teams to manage projects, automate workflows, and rapidly build new secure solutions, using simple no-code tools. We’re revolutionaries – so for us changing the way the world works is all in a day’s work. As a global leader in Intelligent Work Management with a market cap of $10bn, we’ve continued to scale our engineering presence internationally. Since expanding into Bulgaria in October 2024, we’ve grown to a team of 75+ engineers. As we continue building this operation, we’re looking for a talented and motivated Senior Software Engineer who are passionate about continuous learning and excited to grow in a fast-paced, innovative environment. Smartsheet runs on a modern SaaS stack hosted on AWS, with infrastructure defined and managed as code using Terraform and strong engineering best practices. Our core platform includes a legacy Java monolith alongside a growing ecosystem of microservices, primarily built in Java and Go (with a small number of Kotlin services). On the front end, product teams that deliver UI experiences use React. You will work remotely from Bulgaria and will be reporting to an engineering leader. You Will: Work on all aspects of software development, including back-end, front-end, cloud infrastructure, and test automation. Drive high standards for internal services and open-source tools, ensuring reliability and scalability. Deploy services and infrastructure changes frequently in an agile environment using full CI/C

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. As a Senior Software Engineer II at Smartsheet, you will create the next generation of our platform while tackling meaningful distributed systems challenges alongside a talented engineering team. You will collaborate closely with product managers and fellow engineers through code reviews and architectural discussions, and you will have the opportunity to mentor other engineers. This role is a great fit for someone with a strong background of hands-on development as well as solid technical leadership experience. About the Billing & Subscriptions Team The Billing & Subscriptions team is at the heart of Smartsheet’s growth engine. We are responsible for the critical systems that power Licensing and Monetization. Our mission is to build a seamless purchasing experience that supports millions of users and enables the business to rapidly evolve its product and AI offerings at scale. You Will: Contribute to Smartsheet’s most critically visible initiatives into FY28 Build scalable back-end services for the next generation of applications at Smartsheet (Kotlin, Java) Solve challenging distributed systems problems and work with modern cloud infrastructure (AWS, Kubernetes) Lead code reviews and architectural discussions as you work with other software engineers and product managers Be a force multiplying team lead at the helm of our most important work Mentor other engineers on code quality and other industry best practices Forge a strong partnership with product management and other key areas of the business Activel

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. As a Software Engineer II at Smartsheet, you will help build the next generation of our platform while tackling meaningful distributed systems challenges alongside a talented engineering team. You will collaborate closely with product managers and fellow engineers through code reviews and architectural discussions, and you will have the opportunity to mentor junior engineers as you grow in your own career. This role is a strong fit for someone with a couple of years of hands-on development experience who is ready to take on more ownership, sharpen their skills in cloud infrastructure, and help shape how the team uses AI tools to work smarter and faster . You Will: Build scalable back-end services for the next generation of applications at Smartsheet (Kotlin, Java) Solve challenging distributed systems problems and work with modern cloud infrastructure (AWS, Kubernetes) Take part in code reviews and architectural discussions as you work with other software engineers and product managers Mentor junior engineers on code quality and other industry best practices Forge a strong partnership with product management and other key areas of the business Actively use AI tools to improve personal and team efficiency across coding, testing, design, and troubleshooting, exploring AI integration opportunities within team processes and features, and coaching others on effective AI use You Have: 2+ years software development experience building highly scalable, highly available applications 2+ years of programming experience with full st

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. As a global leader in Intelligent Work Management with a market cap of $10bn, we’ve continued to scale our engineering presence internationally. Since expanding into Bulgaria in October 2024, we’ve grown to a team of 70+ engineers. As we continue building this operation, we’re looking for talented and motivated Software Engineers who are passionate about continuous learning and excited to grow in a fast-paced, innovative environment. Smartsheet runs on a modern SaaS stack hosted on AWS, with infrastructure defined and managed as code using Terraform and strong engineering best practices. Our core platform includes a legacy Java monolith alongside a growing ecosystem of microservices, primarily built in Java and Go (with a small number of Kotlin services). On the front end, product teams that deliver UI experiences use React. You will work remotely from Bulgaria and will be reporting to an engineering leader. You Will: Contribute to the entire development lifecycle, from concept to release, ensuring quality at every step. Participate in system architecture discussions to design scalable, high-availability applications. Implement new features and improve existing functionality to enhance our product offerings.. Maintain and develop service APIs that serve millions of users. Collaborate with systems engineers to debug infrastructure challenges. Take part in all phases of quality assurance and defect resolution to maintain the reliability of our systems. Work across multiple disciplines such as front-end, back-end, tes

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. We are hiring a Software Engineer I to join our Engineering team. You will get your hands on full-stack services, dig into distributed systems problems, and work right at the intersection of traditional software engineering and AI-driven development. We are not just dabbling in AI here. We use it to write better code, catch bugs faster, and troubleshoot smarter, and we want engineers who want to get good at that too and help their teammates do the same. You will ship real features, sit in on architectural conversations that actually shape the product, and grow alongside a team that cares as much about doing good work as they do about doing meaningful work. You Will: Build scalable front-end and back-end services for the next generation of applications at Smartsheet (Kotlin, Java, Typescript, React) Solve challenging distributed systems problems and work with modern cloud infrastructure (AWS, Kubernetes) Take part in code reviews and architectural discussions as you work with other software engineers and product managers Forge a strong partnership with product management and other key areas of the business Enhance existing application code with new features and strike a balance when making technical decisions (build vs refactor vs simplify) Actively use AI tools to improve personal and team efficiency across coding, testing, design, and troubleshooting, exploring AI integration opportunities within team processes and features, and coaching others on effective AI use You Have: 1+ years software development experience build

Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more. About the Opportunity We're looking for a Senior Staff Software Engineer to join our Payments Team, based in the Hong Kong. Payments is where OKX meets the real financial world. Our team has built and operates the infrastructure connecting OKX to dozens of payment channels across global markets, giving users deposit and withdrawal options that are fast, convenient, and — most importantly — trustworthy. That platform moves and safeguards user assets at institutional scale, continuously, across time zones and regulatory environments. This is not a greenfield team looking for its footing. The team is established, the platform is in production at scale, and we are actively expanding — both in scope and in headcount. That combination is rare: you get the leverage of joining a growing team where your work visibly shifts the roadmap, along with the discipline that comes from a system already trusted with real money. It's also an unusually good place to learn. Payments is a domain that's hard to pick up from the outside — every market has its own rails, its own settlement behavior, its own failure modes, its own

Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more. About the Opportunity Liquidity Platform provides cutting-edge technology that covers all aspects of crypto trading. We build low-latency connectivity to global crypto venues, including both Cefi and Defi venues, strategy services for automated pricing and trading bots, high-frequency data capturing and analysis, and state-of-art micro frontend for trading management. On top of all these infrastructures, we build highly customized strategies to facilitate crypto liquidities. If you are a strong technologist who is excited about the potentials of crypto trading, interested in fully-automated algo bots, we should talk. We are looking for a Java Software Engineer for Liquidity Platform Structured Product Engineering Team. During your tenure with us, you will be working closely with a liquidity manager for strategy development using an in-house build strategy toolkit. You will demonstrate and develop professional capabilities in the following areas: managing inventory & risk of applications, strategic thinking and problem solving, collaborating with product managers, engineers and liquidity managers

About Anyscale: At Anyscale , we're on a mission to democratize distributed computing and make it accessible to software developers of all skill levels. We’re commercializing Ray , a popular open-source project that's creating an ecosystem of libraries for scalable machine learning. Companies like OpenAI , Uber , Spotify , Instacart , Cruise , and many more, have Ray in their tech stacks to accelerate the progress of AI applications out into the real world. With Anyscale, we’re building the best place to run Ray, so that any developer or data scientist can scale an ML application from their laptop to the cluster without needing to be a distributed systems expert. Proud to be backed by Andreessen Horowitz, NEA, and Addition with $250+ million raised to date. What you'll do Own a major technical area of Ray Core end to end, defining the roadmap, identifying the most important technical problems, and driving execution through production. Lead large, technically complex projects spanning multiple engineers, teams, and/or organizations. Set technical direction and make architectural decisions for distributed computing infrastructure used by demanding production workloads. Design, build, and evolve core distributed-systems primitives rather than simply integrating existing platforms or frameworks. Work on problems involving areas such as distributed execution, scheduling, resource management, fault tolerance, concurrency, networking, storage, or system performance. Stay hands-on with implementation and debugging in a systems-oriented codebase, while raising the technical bar for the engineers around you. Help shape the longer-term architecture and evolution of Ray Core as our workloads and scale continue to grow. What we're looking for 6+ years of software engineering experience, with a track record of increasing technical ownership. Experience leading substantial projects end to end, including defining the problem, creating a roadmap, making architectural decisions, driv

Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more. About the Opportunity We're looking for a Senior Software Engineer to join our Payments Team, based in the US. Payments is where OKX meets the real financial world. Our team has built and operates the infrastructure connecting OKX to dozens of payment channels across global markets, giving users deposit and withdrawal options that are fast, convenient, and — most importantly — trustworthy. That platform moves and safeguards user assets at institutional scale, continuously, across time zones and regulatory environments. This is not a greenfield team looking for its footing. The team is established, the platform is in production at scale, and we are actively expanding — both in scope and in headcount. That combination is rare: you get the leverage of joining a growing team where your work visibly shifts the roadmap, along with the discipline that comes from a system already trusted with real money. It's also an unusually good place to learn. Payments is a domain that's hard to pick up from the outside — every market has its own rails, its own settlement behavior, its own failure modes, its own complian

Who We Are At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me , Do the Right Thing , and Get Things Done . These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. About the Opportunity Our internal platform engineering team builds and maintains the systems that drive enterprise efficiency and support OKX's rapid global growth. As a Senior Staff Engineer, you'll be a key technical leader — driving architecture decisions, solving complex engineering challenges, and raising the technical bar across the organisation. What You’ll Be Doing Own and drive architecture and design for large-scale, complex internal platform systems Define and influence the long-term technical roadmap, ensuring scalability and reliability at global scale Lead platform modernisation initiatives — architecture evolution, technical debt reduction, and reliability improvements Collaborate closely with Engineering, Product, and Business stakeholders to deliver robust, scalable solutions Champion AI and intelligent automation adoption to improve operational efficiency at scale Provide technical mentorship and guidance to senior engineers across teams What We Look For In You Bachelor's or above in CS/Engineering; deep Java expertise with extensive large-scale distributed systems experience 8+ years in software engineering with a strong track record of technical leadership at scale Hands-on architecture ownership across complex, cross-team platform del