Java Backend Developer Jobs

Who we are At Twilio, we’re shaping the future of communications, all from the comfort of our homes. We deliver innovative solutions to hundreds of thousands of businesses and empower millions of developers worldwide to craft personalized customer experiences. Our dedication to remote-first work , and strong culture of connection and global inclusion means that no matter your location, you’re part of a vibrant team with diverse experiences making a global impact each day. As we continue to revolutionize how the world interacts, we’re acquiring new skills and experiences that make work feel truly rewarding. Your career at Twilio is in your hands. . Hiring and how we work We use Artificial Intelligence (AI) to help make our hiring process efficient. That said, every hiring decision is made by real Twilions! Also, while we are a remote-first company, you may be asked to report in person on an ad-hoc basis for team gatherings, functional off-sites or customer meetings. . See yourself at Twilio Join the team as Twilio’s next Technical Support Engineer 2 Ireland on Twilio’s Voice, Platform Application & Segment teams (VSPA). About the job This position is needed to support our customers’ use of the Twilio platform, and help customers get the best experience from Twilio’s products. You will function as the voice of Twilio to our customers and partners, and operate as a subject matter expert for Twilio’s APIs and SDKs. This position also includes rostering. Rosters will be of a 5 day work week, and could include one or both weekend days. Responsibilities In this role, you’ll: Use your strong technical and diplomatic skills to address customer issues and provide customer feedback to Twilio’s Product and Engineering teams. Work with our customers' and partners' developers, architects, and support personnel to resolve complex problems with potentially very costly and far-reaching consequences. Leverage your experience with troubles

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. As an intern at Affirm, you will be a contributing member of our outstanding engineering team, and as such you will work on meaningful projects and frequently ship code. Recent grads and past interns have built a real-time high-throughput data processing pipeline, developed an extensive automated testing framework, and built out our proprietary financial platform that is central to our long term company mission. We are excited to meet and consider strong students for our 12-16 week internships. We are a dynamic organization that is happy to tailor projects to your skills, and we will work with you throughout the interview process to determine which team will be best for you. What You'll Do Interns are responsible for developing and shipping a project and verifying that it works in production. Because things are changing fast at Affirm, we do not specify intern projects in advance, instead you will collaborate with your mentor and manager when you start to spec a project that will best contribute to your team. This role will ship code and monitor the deployment of your work. Our intern projects are not isolated or intended to be thrown away: your team will depend on your contributions! We pair interns with a dedicated mentor who will be by your side to give advice and ensure the success of your project. Expect to meet with them on a regular basis and receive feedback. There are opportunities to attend events with other interns and full-time Affirmers! Past events have included virtual cooking classes, executive fireside chats, cable car trolley tours, and Giants games. Interns present their work to the entire engineering organization at the end of the internship. What We Look For Passion and dedication to changing consumer banking for the better Experience with Python, C/C++ or Java Frontend

MongoDB Technical Services Engineers combine technical expertise, structured problem solving, and exceptional customer service to help customers build and operate reliable MongoDB applications and deployments. The team supports the MongoDB ecosystem—including the database server, drivers, Atlas, Cloud Manager, Compass, and related services. Engineers work directly with customers to understand complex technical challenges, identify root causes, and provide practical solutions for largescale, data intensive environments. We are looking for highly technical, insatiably curious, and adaptable engineers who enjoy understanding how systems are designed, deployed, and operated. Success in this role requires sound judgment, clear communication, initiative, collaboration, and a genuine desire to help others. Location and working model This role is based in Toronto and follows a hybrid working model, with a minimum expectation of three days per week in the office. Office location: 333 Bay St., Suite 1400, Toronto, ON M5H 2R2, Canada Cool things you’ll do You'll be working alongside our largest customers, solving their complex challenges - resolving questions on architecture, performance, recovery, security, and everything in between. You'll be an expert resource on best practices in running MongoDB at scale, whatever that scale may be. You'll be an advocate for customers' needs - interfacing with our product management and development teams on their behalf. And you'll contribute to internal projects, including software development of support tools for performance, benchmarking, and diagnostics. What you need We consider all candidates with an eye for those who are self-taught, insatiably curious, and multi-faceted. The ideal candidates should have strong technical experience in one (or more) of the following areas Systems administration Distributed systems Network Administration Database architecture and administration Application Architecture Data architecture and design Per

**This is a 6 month internship starting in January 2027** We’re seeking curious minds like yours to collaborate with full-time engineers and cross functional teammates, learn development standard methodologies, and gain practical software engineering experience. Software engineering interns are fully integrated into software engineering teams across our Product and Technology organization. Interns spend their time pushing production-level code to make lasting contributions across MongoDB’s products and services for our internal teams, external customers, and developer end users. What we are looking for in you (qualifications) In the process of receiving a Bachelor’s or Master's degree in Computer Science, Computer Engineering, or a related field. Have a foundation in computer science theory, with proficiencies in data structures, algorithms, and software design. Fluent in any one of the following programming languages: Java, Python, Go, C++, Javascript, Node.js - or a comparable object-oriented programming language. Have a minimum of one semester remaining in university studies after the internship concludes. Graduation date in, Spring 2028 or Summer 2028. Must be authorized to work in Ireland and provide the Company with copies of all relevant documents, if requested. Company sponsorship may be available for eligible candidates applying for certain roles. What you'll find at MongoDB Authentic Culture: A workplace where you are encouraged to bring your whole self to work, we believe that Embracing the Power of Differences is the best way to broaden our own perspectives and foster innovation. Personalized Mentorship: Pair up with an engineering Mentor, a Program Advisor from the Early Talent Recruitment Team, and an Employee Resource Group (ERG) Guide to foster your growth. Career Coaching Sessions: Access to a tailored training program designed uniquely for interns’ personal and professional development. Work-Life Harmony: Embrace "Bloom for Interns" with access to

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. About Okta Okta is an enterprise grade identity management service, built from the ground up in the cloud and delivered with an unwavering focus on customer success. With Okta you can manage access across any application, person, or device. Whether the people are employees, partners, or customers, or the applications are in the cloud, on premises, or on a mobile device, Okta helps you become more secure, make people more productive, and maintain compliance. The Okta service provides directory services, single sign-on, strong authentication, provisioning, workflow, and built in reporting. It runs in the cloud on a secure, reliable, extensively audited platform and integrates deeply with on premises applications, directories, and identity management systems. About the Team The Data Platform team is responsible for the foundational data services, systems, and data products for Okta that benefit our users. Today, the Data Platform team solves challenges and enables: Streaming analytics Interactive end-user reporting Data and ML platform for Okta to scale Telemetry of our products and data Our elite team is fast, creative and flexible. We encourage ownership. We expect great things from our engineers and reward them with stimulating new projects, new technologies and the chance to have significant equity in a company. Okta is about to change the cloud computing landscape forever. About the Position This is an opportunity for experienced Softwa

We are a global team of innovators and pioneers dedicated to shaping the future of observability. At New Relic, we build an intelligent platform that empowers companies to thrive in an AI-first world by giving them unparalleled insight into their complex systems. As we continue to expand our global footprint, we're looking for passionate people to join our mission. If you're ready to help the world's best companies optimize their digital applications, we invite you to explore a career with us! New Relic Solutions Consultant II If you have that special mix of DNA that makes an extraordinary Solutions Consultant (SC) – the blend of great business savvy and technical prowess – then we are a match made in heaven! As a key member of our New Relic Solutions Consulting (NRSC) team, you will be responsible for understanding a client’s business challenge and technical environment through deep levels of discovery and engagement. You will present technology solutions to solve these business challenges and build confidence in the New Relic platform capabilities through value alignment and clear differentiation. As the domain expert on New Relic you will help drive the ‘Technical Win’ in accounts by removing all technical objections in the sales cycle through your depth of technology skills and business acumen to provide clear business value. You will be responsible for driving revenue for our New Relic platform with the the support and partnership of Sales, Product Management and our executive team. This role requires a hands-on solution consultant who can go wide and deep on solution positioning, differentiation and value during sales cycles. What you'll do: You will be the Technical lead for New Relic prospects (new logos) and customers and own the technical strategic direction in the account through an advanced ability to develop, position and provide product-centric and value-centric solutions during sales cycles, while achieving quarterly and annual sales goals for an assi

We are looking to speak to candidates who are based in Sydney for our hybrid working model. Required Experience building and maintaining complex mission-critical production database systems (RDBMS or NoSQL). Coding/scripting ability in one or more languages: Java, Python, Ruby, C, C++, C#, Javascript, node.js, Go, etc. Experience working with APIs and using it to integrate with 3rd party technologies and software in the areas of security and fraud, big data analytics and AI, healthcare, content management, IoT, database performance monitoring and management; financial services, healthcare services, telco etc. Solid hands-on experience with systems engineering, including Linux performance, memory management, I/O tuning, configuration, security, networking, clusters, and troubleshooting Experience analyzing and troubleshooting issues holistically, from the application tier through the database, down to storage Troubleshooting experience with TCP/IP networking stack on OS and Hypervisor Experience using or administering one or more cloud services stacks such as AWS, Azure or GCP Hands-on experience with administering and troubleshooting NAS, SAN, local storage, multi-pathing Experience building solutions involving application workloads and use cases. Preferred Experience using or managing MongoDB preferred Experience in one or more programming languages developing applications using a NoSQL or SQL database. Strong understanding of authentication systems such as LDAP, Kerberos, AD Experience using distributed version control systems, and in particular git Experience with Kubernetes or other orchestration systems using vendor-specific Enterprise operators. Experience in working software product teams, and familiarity with product release processes from planning to release. Success Measures In 3 months, you’ll have gained a deep understanding of MongoDB and its partner ecosystem. You will complete New Hire Training. In 6 months, you will be comfortable working frontline w

About Pinterest: Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime. At Pinterest, we’re on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product. Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other’s unique experiences and embrace the flexibility to do your best work. Creating a career you love? It’s Possible. At Pinterest, AI isn't just a feature, it's a powerful partner that augments our creativity and amplifies our impact, and we’re looking for candidates who are excited to be a part of that. To get a complete picture of your experience and abilities, we’ll explore your foundational skills and how you collaborate with AI. Through our interview process, what matters most is that you can always explain your approach, showing us not just what you know, but how you think. You can read more about our AI interview philosophy and how we use AI in our recruiting process here . Solutions Engineer Interns work at the intersection of engineering, data and Pinterest’s advertising and revenue ecosystem. They contribute to scoped technical projects that improve tools, workflows, integrations and support experiences for internal teams, advertisers and partners. The role offers exposure to real engineering work, cross-functional collaboration and responsible AI-assisted workflows, including applying judgment and verification to AI-supported work. This is an opportunity for someone who wants to see how technology drives customer and business impact. You’ll partner with engineers, data and analytics specialists, product stakeholders and go-to-market teams; learn how ambiguous operational problems become reliable technical solutions; and gain hands-on experience across coding, debugging, data analysis, automation, documentation

The database market is massive (IDC estimates it to be $121B+ by 2025!) and MongoDB is at the head of its disruption. At MongoDB we are transforming industries and empowering developers to build amazing apps that people use every day. We are the leading modern data platform and the first database provider to IPO in over 20 years. Join our team and be at the forefront of innovation and creativity. Building on the rapid success and adoption of MongoDB, we are delivering applications and services that make it much easier to manage and scale database deployments. These next-generation systems are a growing list but currently include products such as Atlas (www.cloud.mongodb.com), Cloud Manager and Compass. MongoDB Atlas is the premier multi-cloud database-as-a-service built and operated by the makers of MongoDB. The Cloud Operations Engineering team at MongoDB is a worldwide team responsible for the consistent operational success of every MongoDB Atlas customer. As a Cloud Operations Engineer, you will help ensure the success of our Atlas customers, whether they are early startups or large multinational companies, cloud-native or just getting started with a digital transformation to the cloud. You are excited about the core mission of MongoDB, and the opportunity to join the team responsible for operating Atlas, the fastest-growing multi-cloud database-as-a-service in the world. Cloud Operations Engineers are responsible for building internal tools and process automation. Day-to-day duties are creating and monitoring systems alert dashboards, reviewing critical event and system logs, accessing customer instances that underpin their production databases, and performing server administration duties including performance troubleshooting. Applicants must be critical thinkers who are quick to detect, resolve, or escalate issues that are sometimes broad in scope and difficult to trace. Day to day you will… Successfully coordinate with a global team of Cloud Operations E

Who We Are HP IQ is HP’s new AI innovation lab. Combining startup agility with HP’s global scale, we’re building intelligent technologies that redefine how the world works, creates, and collaborates. We’re assembling a diverse, world-class team—engineers, designers, researchers, and product minds—focused on creating an intelligent ecosystem across HP’s portfolio. Together, we’re developing intuitive, adaptive solutions that spark creativity, boost productivity, and make collaboration seamless. We create breakthrough solutions that make complex tasks feel effortless, teamwork more natural, and ideas more impactful—always with a human-centric mindset. By embedding AI advancements into every HP product and service, we’re expanding what’s possible for individuals, organisations, and the future of work. Join us as we reinvent work, so people everywhere can do their best work. About The Role As an Offensive Security Engineer within HP IQ’s Product Security team, you will partner closely with engineering teams to identify, validate, and mitigate security risks across the product lifecycle. You’ll influence design decisions, embed security into development workflows, and continuously assess attack surfaces to guide and enhance secure development. What You Might Do Lead penetration tests and security assessments for product and feature releases. Conduct continuous security engagements, proactively identifying vulnerabilities and driving remediation to closure. Advise engineering and product teams on remediation strategy, validating fixes and tracking measurable improvements to security posture over time.​​​​​​​​​​​​​​​​ Assess attack surfaces across internet-facing services, APIs, and device interfaces (Wi-Fi, BLE, USB). Perform threat modeling and security architecture reviews that directly shape product decisions. Define and lead end-to-end risk reduction initiatives with internal and external stakeholders, aligning offensive findings to strategic security investments.​​​​

Who we are: About Stripe Stripe is a financial infrastructure platform for businesses. Millions of companies - from the world’s largest enterprises to the most ambitious startups - use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career. About the team Stripe offers an interesting middle ground between joining a small startup and going to work for a multinational company. We have systems and processes optimized for early-career professionals. You will be in an environment that prizes rigor, discipline, and reliability—from our products, from our ways of working, and from our colleagues. You will learn how the best teams put together extremely reliable systems, and you will be responsible for operating these systems, with adequate backup when things get tough. The Security organization is dedicated to building and maintaining a secure financial infrastructure platform. By joining this team, you will be on the front lines, engineering solutions that protect the sensitive data and systems underpinning a huge portion of the world's economy. You will contribute to core security functions like threat detection and rapid incident response, building and scaling the platforms that manage vulnerabilities, and proactively performing offensive security assessments to identify weaknesses before they can be exploited. This is a chance to apply software engineering principles and new technologies such as AI to solve complex, high-stakes security challenges, ultimately ensuring that Stripe's mission to increase the GDP of the internet is achieved securely. What you’ll do As a Security Engineer New Grad you will have the opportunity to work across various security disciplines and own projects from sta

Sigma unlocks the value of data by delivering cloud-scale analytics and business intelligence with the simplicity of a spreadsheet, complete with pivot tables and dashboards. We empower business professionals and data teams to quickly explore, analyze, visualize, and collaborate, leveraging all of their data across the organization. Our internship program at Sigma: Sigma’s Early Career Program is the launchpad for the next generation of engineers and innovators. As an Intern at Sigma, you’ll work on various production features and learn efficient engineering for large scalable systems. Our interns work directly with our engineers, product leaders, and designers across the organization everyday. We’re looking for students who bring curiosity, a spirit for collaboration, and a desire for shaping the future of business insights and data exploration. Internship Program Qualifications: Current student : Applicants must be currently enrolled in a university undergraduate or graduate degree program in the U.S with a graduation date of December 2027 or later Able to intern from June 2027 through August/early September 2027 (dates flexible) Authorization : You must be legally authorized to work in the US during the Summer 2027 program Visa sponsorship is not available for our internship positions Location: Our remaining internships are in-person and located primarily within San Francisco, CA or New York, NY. Relocation assistance will be provided for students who will need to relocate for the Summer in the form of a relocation bonus. Applicants must be able to work in-person in our office in San Francisco, CA or New York, NY for the duration of their internship About the role: Sigma’s Engineering organization is a dynamic, high performing team of Software Engineers who complement each other's skills. Our Engineers design, implement, and scale technical solutions that power our core product and enable our users to make data driven

Sigma unlocks the value of data by delivering cloud-scale analytics and business intelligence with the simplicity of a spreadsheet, complete with pivot tables and dashboards. We empower business professionals and data teams to quickly explore, analyze, visualize, and collaborate, leveraging all of their data across the organization. Our internship program at Sigma: Sigma’s Early Career Program is the launchpad for the next generation of engineers and innovators. As an Intern at Sigma, you’ll work on various production features and learn efficient engineering for large scalable systems. Our interns work directly with our engineers, product leaders, and designers across the organization everyday. We’re looking for students who bring curiosity, a spirit for collaboration, and a desire for shaping the future of business insights and data exploration. Internship Program Qualifications: Current student : Applicants must be currently enrolled in a university undergraduate or graduate degree program in the U.S with a graduation date of December 2027 or later Able to intern from June 2027 through August/early September 2027 (dates flexible) Authorization : You must be legally authorized to work in the US during the Summer 2027 program Visa sponsorship is not available for our internship positions Location: Our remaining internships are in-person and located primarily within San Francisco, CA or New York, NY. Relocation assistance will be provided for students who will need to relocate for the Summer in the form of a relocation bonus. Applicants must be able to work in-person in our office in San Francisco, CA or New York, NY for the duration of their internship About the role: Sigma’s Engineering organization is a dynamic, high performing team of Software Engineers who complement each other's skills. Our Engineers design, implement, and scale technical solutions that power our core product and enable our users to make data driven

Who we are About Stripe Stripe is a financial infrastructure platform for businesses. Millions of companies—from the world’s largest enterprises to the most ambitious startups—use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone’s reach while doing the most important work of your career. About the team Stripe’s SMB Solutions Architecture (SA) team works with technical and business leaders (CTO/ CIO/ CEO/ Founders etc.), payments leaders and product engineering teams in the mid-market segment to evangelize Stripe’s solutions in the market. A solutions architect’s role is to build relationships with decision makers and think strategically about the business needs of Stripe’s customers. Solution Architects identify and propose Stripe solutions to solve complex business challenges and drive growth for our customers. SAs establish and prescribe best practices around a customer’s strategy, provide business and technical thought leadership and are viewed as a trusted advisor. They work on scaling business processes aligned to maximizing account coverage while working closely with customer and partner resources to deliver a solution that can be adopted quickly. What you’ll do As a member of the team, the Solutions Architect will build highly consultative trusted relationships with c-level executives and technical decision makers in the customer’s organization to provide business and technical thought leadership, and become a trusted advisor in solving mission-critical business challenges. She/he will architect business models with them so they can drive new monetization opportunities and growth for both the user and Stripe. Responsibilities Drive thought leadership and build executive relationships with key business and technical stake

Here at Appian, our values of Intensity and Excellence define who we are. We set high standards and live up to them, ensuring that everything we do is done with care and quality. We approach every challenge with ambition and commitment, holding ourselves and each other accountable to achieve the best results. When you join Appian, you’ll be part of a passionate team dedicated to accomplishing hard things, together. Systems Consultant II Are you a systems professional looking to scale mission-critical cloud infrastructure and defend vital public sector networks? Help federal agencies automate their most complex operational workflows. Location: McLean/Tysons, VA | Work Model: On-site (4–5 days/week) About the Team Appian Customer Success is obsessed with supporting our federal customers’ missions by delivering transformative, high-availability cloud automation solutions. Our Federal DevOps Engineering team works hand-in-hand with government agencies, ensuring their automated workflows are resilient, securely scaled, and continuously optimized. Grounded in a culture of in-person collaboration at our McLean HQ, we tackle complex technical challenges to keep public infrastructure running smoothly across the AI-Powered Process Automation landscape. The Opportunity As a DevOps Engineer within our Federal Customer Success division, you will bridge the gap between cloud infrastructure engineering and modern application delivery. This role is vital right now because federal agencies are rapidly scaling their digital footprints across hybrid and secure cloud ecosystems. Under the guidance of senior architects, you will gain deep operational mastery of our software platform, automate underlying infrastructures, and enable agencies to achieve true Enterprise-Grade Orchestration . What You’ll Do Scale Cloud Infrastructure: Participate in the installation, day-to-day operation, and scaling of the Appian platform across federal customer environments. Master Cloud & Systems Admi