Back End Developer Jobs

Zafin is an AI platform company helping regulated institutions modernize how critical work is designed, governed, and delivered. Our technology enables organizations to move faster while maintaining the governance, accountability, and control required in highly regulated environments. Our portfolio includes Zafin AIOS , an agent orchestration platform for governed AI work; the Zafin Banking Platform , which helps banks modernize product, pricing, offers, billing, loyalty, and relationship management; and Zafin IO , an integration platform that connects data, systems, and workflows across complex enterprise environments. Headquartered in Toronto, Canada, Zafin partners with leading financial institutions across North America, Europe, the Middle East, Africa, and Asia-Pacific. As AI transforms the future of financial services, we're building the platforms that help regulated organizations adopt AI responsibly and at scale. About the Role We are looking for a Product Engineer II to join our Banking Platform organization. In this role, you will design, build, and maintain full stack features for a core banking platform product, working across front-end and back-end systems to ship reliable, scalable software. You will collaborate closely with Product, QA, and cross-functional engineering teams to translate requirements into effective technical solutions, contribute to technical design discussions and code reviews, and help embed strong engineering standards across the team. Familiarity or interest in AI-assisted development is a plus, as the product is evolving toward AI-enabled, AIOS-powered workflows. What will you do? Design, build, and maintain scalable, reliable full-stack features across a core Banking Platform product. Translate requirements and designs into effective technical solutions, ensuring clean, maintainable, and well-tested code across front-end and back-end systems. Collaborate with Product, QA, Architecture, Engineering, Business

Become a part of our caring community Humana’s Digital Health Platform (DHP) is the engineering platform behind many of Humana’s consumer digital experiences. DHP Product Engineering builds the shared pieces other Humana teams build on, including a micro-frontend catalog, accessibility tooling, and API foundations, and we build them with AI coding agents at the center of how we work. We are hiring a Senior Product Engineer who wants a say in what gets built as well as the craft of building it, from accessible interfaces to the services behind them. You will own features across the whole stack, and you decide the technical approach for the work you own. You use AI coding tools like Claude Code every day, and you help build the shared skills and tooling behind that workflow. We measure your work by the results it produces for Humana’s members and patients and for the teams who build on our platform. The Senior Product Engineer helps decide what we build, not just how we build it. This is a senior engineering role at its foundation. You design, develop, and deploy scalable web applications end to end, and you meet a high bar for engineering craft. You also own the product: you shape what we build, influence what goes on the roadmap, and are measured by the outcomes your work produces rather than the tickets you close. You explore before you commit, propose the work as often as you receive it, and sharpen requirements rather than simply implement them. You will build accessible user interfaces, implement robust back-end microservices, and integrate the two with GraphQL, all while exercising considerable latitude over technical approach. Strong product instinct here does not lower the engineering bar; it raises the overall one. Required Qualifications Bachelor’s degree in Computer Science or a related field 5 or more

Bready* to make a change? Toast is a rapidly growing company that's revolutionizing how the restaurant industry does business by pairing technology with an extraordinary commitment to customer success. We help restaurants streamline operations, increase revenue, and deliver amazing guest experiences through our platform that combines restaurant point of sale, team management, guest-facing technology, and award-winning customer support. Join us as we empower the restaurant community to delight guests, do what they love, and thrive. We're looking for a Senior Software Engineer to help build and scale the platforms that calculate and deliver pay to restaurant employees, from tip pooling and redistribution to wage calculation, earnings retrieval, and payroll delivery. You'll lead highly visible, mission-critical infrastructure that determines what employees take home, and that powers products restaurant teams rely on every day. About this roll* (Responsibilities) Drive the evolution of our tips and earnings platforms, leading complex projects that improve functionality and reliability for our customers. Take end-to-end ownership of systems, contributing to a strong engineering culture focused on correctness, reliability, and long-term maintainability. Lead projects from design and estimation through implementation, testing, and deployment to help shape how we build reliable systems at scale. Ship code that directly impacts product revenue and the accuracy of what restaurant employees are paid. Partner with product and design to influence what we build and how we build it. Contribute to and elevate team standards through thoughtful code reviews and technical discussions. Mentor and provide technical guidance to other team members. Leverage AI tools like Claude to accelerate development and pioneer better ways to work. Do you have the right ingredients*? (Requirements) 5+ years of back-end experience with one or more object-oriented programming languages (such as Java, Ko

Weekly office requirement: Monday/Wednesday weekly Employment type: Permanent Seniority level: Mid-senior At GWI we’re always looking for extraordinary people who thrive on making an extraordinary impact. Right now we’re looking for a Product Manager to play a key role in our User Management (Revenue & Enablement) team in London . If that’s you, and making a difference gets you out of bed in the morning, keep reading. It could be the start of something, well, extraordinary. Sounds great, what will I be doing? 🤔 As our Product Manager you'll own the systems that make GWI's subscription and consumption business run, such as billing, metering, user plans, feature access, product analytics and user messaging. It's the layer everything else sits on. Get it right and GWI can price, package and sell in new ways. Two big pieces of work sit at the heart of this role. The first is billing for our consumption products, which is an area we're actively developing, and one you'll help shape. The second is making our internal tools talk to each other properly, so user data flows consistently between them and Salesforce, and everyone across the business is working from the same picture. Most of your stakeholders are internal - Revenue Operations, Finance, Business Intelligence, Client Success and Engineering - with some direct client contact along the way. You'll lead one squad of front-end and back-end engineers and a designer, alongside the PM and Engineers in our sister squad, Identity & Access - together you cover the whole of User Management. A few things you’ll be responsible for: 👉 Connecting our internal user management tools with Salesforce and each other, so data flows consistently and user information is mapped the same way everywhere 👉 Billing for our consumption products - metering, API usage, payment flows and user plans 👉 Customer feature flags, access and management - who can see what, and why 👉 Product analytics - event firing, sign-up flow

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. Okta is The World’s Identity Company. We free everyone to safely use any technology - anywhere, on any device or app. Our Identity as a Service solution enables secure yet flexible access, authentication, and automation that transforms how people move through the digital world, putting Identity at the heart of business security and growth. At Okta, we celebrate a variety of perspectives and experiences. We are not looking for someone who checks every single box - we’re looking for lifelong learners and people who can make us better with their unique experiences. The Engineering Opportunity Okta's Workforce Identity Cloud (WIC) secures billions of global logins every day. The Resilience Team within WIC maximizes service availability by building foundational, high-scale systems. Our engineers solve complex distributed-systems challenges - from database proxies to traffic shaping - to ensure the platform remains trustworthy and reliable for every customer. We are seeking a Staff Back-End Software Engineer to lead technical initiatives and own the reliability of our expanding Identity as a Service platform. In this role, you will develop microservices, build innovative frameworks, and optimize our cloud-native environment. You will champion reliability during design phases and collaborate across teams to address technical gaps. We value iterative development, automated testing, and individual ownership. Join our creative, fast-paced team to work on impac

About Anthropic Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems. About the role We believe skill with AI is fundamental to human agency. Education Labs builds the paradigms that help people become genuinely more capable—not just more engaged. This is a new kind of role: part researcher, part product builder, part interaction designer. You'll be the second technical builder on a small team studying how AI transforms human capability—and shipping features based on what we discover. You'll have significant creative license to define what "good" looks like, exploring new interaction patterns rather than optimizing existing ones. We're skeptical of tutorials, onboarding flows, and engagement metrics. We care about experiences that make users progressively more capable, curious, and empowered over time. This means integrating skill development into product design, using Claude itself as a capability-building partner, and measuring success by how users actually grow. You'll operate as a one-person technical shop: prototyping new ideas, establishing technical direction, and shipping production-quality features to millions of users. You'll need strong product instincts and clean interface design sensibilities, balanced with comfort in ambiguity and frontier thinking. Responsibilities: Ship features that help users develop real skill with AI—measuring success by capability growth, not time-on-site Architect end-to-end prototypes (front-end and back-end) that test new interaction paradigms, with particular attention to the front-of-the-frontend: motion, polish, and interaction feel Define technical direction for the team—establish patterns others can follow Build relationships across Product, Design, and Rese

About Anthropic Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems. About the Role We're looking for a Software Engineer to join the team building Claude Security. In this role, you'll take new security capabilities in frontier models and turn them into products that customers can rely on, working across the full stack from early prototype through production. This role sits close to both research and go-to-market. You'll work with researchers on the team to understand what the models can do and where they fall short, and with customers and partners to understand which problems are worth solving for them. You'll be expected to form your own view from both and to own significant pieces of the roadmap, including deciding what not to pursue. The right candidate is a strong generalist engineer with the technical depth to engage with research, the product instincts to know what's worth building, and the drive to move fast. Prior security experience is useful but not required; range across the stack and good judgment about what to build matter more. Responsibilities Build and ship user-facing and/or backend features for Claude Security Build the agent loops, tool integrations, and enabling infrastructure for cybersecurity products Collaborate tightly with product managers and go-to-market to understand user needs, shape feature scope, and make informed tradeoffs as you build Iterate quickly based on user feedback and internal testing, improving the experience on a continuous basis Collaborate with research teams to identify and develop new model capabilities for security applications You may be a good fit if you: Contribute across the stack, from front-end UI to back-end infrastructure Are proficient in Type

About the Team The Privacy Team at OpenAI is committed to building a secure and trustworthy platform. Our area of responsibility encompasses all OpenAI products and systems that process user data. We provide cross-functional partners with the tools needed to ensure that all products adhere to the highest standards of data privacy and legal compliance. Our approach to prioritizing responsible data use is integral to OpenAI's mission of safely introducing Artificial General Intelligence (AGI) that offers widespread benefits. About the Role We’re in search of a Software Engineer with experience building data pipelines and working closely with members of the Legal team. This role is perfect for someone who's passionate about the intersection of systems, privacy, and legal compliance. You will architect, design, and write backend systems responsible for handling some of the most sensitive data at OpenAI. This role is based in Dublin, Ireland. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees. In this role, you will: Design, build, and maintain back-end systems and services that power privacy and data compliance functions within our API products and consumer applications. Work closely with legal advisors and other engineers to respond to court orders and other legal processes, all while upholding strict data privacy and legal standards. Identify opportunities for automation and build the tools that enable other teams to automate tasks involving customer data. Develop and implement data handling policies and procedures in compliance with legal and ethical standards, ensuring the integrity and confidentiality of user data. You might thrive in this role if you: Have experience building data pipelines, especially for legal processes and investigative workflows. Can translate legal requirements into technical solutions and explain technical solutions to a non-technical audience. Take responsibility for problems from be

About Flexport: At Flexport, we believe global trade can move the human race forward. That’s why it’s our mission to make global commerce so easy there will be more of it. We’re shaping the future of a $10T industry with solutions powered by innovative technology and exceptional people. Today, companies of all sizes—from emerging brands to Fortune 500s—use Flexport technology to move more than $19B of merchandise across 112 countries a year. The recent global supply chain crisis has put Flexport center stage as we continue to play a pivotal role in how goods move around the world. We are proud to have the support of the best investors in the game who believe in our mission, solutions and people. Ready to tackle global challenges that impact business, society, and the environment? Come join us. Staff Software Engineer: Platform Every engineer at Flexport ships code that moves real freight across 112 countries. The faster and safer they can do that, the faster the world's supply chains move. The PSI (Platform, Security & Infrastructure) team makes this possible: we build the paved path and tooling that hundreds of engineers around the world rely on every day to ship. This is not a role where you wait for tickets. You'll talk to engineers, dogfood our platform, and find the friction that's slowing us down, and then design and ship the tools to remove that. What You'll Do You'll own and evolve the developer platform that powers Flexport engineering. That means: Making the best paved paths and self-serve tooling possible that makes the right thing the easy thing, protected by guardrails but not locked gates. Creating and supporting developers with CI/CD pipelines (Buildkit, Github Actions), build tooling (Gradle, Bazel, npm/pnpm/bun, Go and Cargo) and artifact repositories (Artifactory, ECR, github). Owning and improving the backend and frontend developer experience. Acting as the steward of our GraphQL and gRPC ecosystem and make sure our middleware, fed

About Flexport: At Flexport, we believe global trade can move the human race forward. That’s why it’s our mission to make global commerce so easy there will be more of it. We’re shaping the future of a $10T industry with solutions powered by innovative technology and exceptional people. Today, companies of all sizes—from emerging brands to Fortune 500s—use Flexport technology to move more than $19B of merchandise across 112 countries a year. The recent global supply chain crisis has put Flexport center stage as we continue to play a pivotal role in how goods move around the world. We are proud to have the support of the best investors in the game who believe in our mission, solutions and people. Ready to tackle global challenges that impact business, society, and the environment? Come join us. Staff Software Engineer: Platform Every engineer at Flexport ships code that moves real freight across 112 countries. The faster and safer they can do that, the faster the world's supply chains move. The PSI (Platform, Security & Infrastructure) team makes this possible: we build the paved path and tooling that hundreds of engineers around the world rely on every day to ship. This is not a role where you wait for tickets. You'll talk to engineers, dogfood our platform, and find the friction that's slowing us down, and then design and ship the tools to remove that. What You'll Do You'll own and evolve the developer platform that powers Flexport engineering. That means: Making the best paved paths and self-serve tooling possible that makes the right thing the easy thing, protected by guardrails but not locked gates. Creating and supporting developers with CI/CD pipelines (Buildkit, Github Actions), build tooling (Gradle, Bazel, npm/pnpm/bun, Go and Cargo) and artifact repositories (Artifactory, ECR, github). Owning and improving the backend and frontend developer experience. Acting as the steward of our GraphQL and gRPC ecosystem and make sure our middleware, fed

About Flexport: At Flexport, we believe global trade can move the human race forward. That’s why it’s our mission to make global commerce so easy there will be more of it. We’re shaping the future of a $10T industry with solutions powered by innovative technology and exceptional people. Today, companies of all sizes—from emerging brands to Fortune 500s—use Flexport technology to move more than $19B of merchandise across 112 countries a year. The recent global supply chain crisis has put Flexport center stage as we continue to play a pivotal role in how goods move around the world. We are proud to have the support of the best investors in the game who believe in our mission, solutions and people. Ready to tackle global challenges that impact business, society, and the environment? Come join us. Senior Software Engineer: Platform Every engineer at Flexport ships code that moves real freight across 112 countries. The faster and safer they can do that, the faster the world's supply chains move. The PSI (Platform, Security & Infrastructure) team makes this possible: we build the paved path and tooling that hundreds of engineers around the world rely on every day to ship. This is not a role where you wait for tickets. You'll talk to engineers, dogfood our platform, and find the friction that's slowing us down, and then design and ship the tools to remove that. What You'll Do You'll own and evolve the developer platform that powers Flexport engineering. That means: Making the best paved paths and self-serve tooling possible that make the right thing the easy thing. Creating and supporting developers with CI/CD pipelines (Buildkit, Github Actions), build tooling (Gradle, Bazel, npm/pnpm/bun, Go and Cargo) and artifact repositories (Artifactory, ECR, github). Owning and improving the backend and frontend developer experience. Acting as the steward of our GraphQL and gRPC ecosystem and make sure our middleware, federation and schema sharing, CLIs, codegen and

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 Developer & End-user Experience Platform (DEEP) organization empowers all of Stripe's products with a shared product platform that helps with rapidly delivering high-quality, cross-product experiences across our UI and API surfaces. It focuses on providing a consistent and scalable developer experience that any developer (both internal and external) can leverage to accelerate a merchant's ability to create value using Stripe. Team matching — exact team matching for one of the subteams will begin during final stages. Please note we may also consider you for different orgs based on your experience, location, etc. More information on our team matching process can be found here . What you’ll do We're looking for Backend Engineers who want to make an impact on managing money at a global scale with a passion for building ergonomic APIs. You'll play a key role in extending our balance management platform and in building out a new funds accessibility platform that enterprises and SMBs use. Our team collaborates with many cross-functional teams—from Infrastructure to Product—at Stripe to deliver innovative solutions that address evolving user needs. Responsibilities Scope, design, build, and maintain APIs, services, and large-scale systems that reliably and efficiently handle billions of money movement requests Debug and solve critical production issues across services and multiple levels of the stack Mentor engineers to help them grow C

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 Our team owns open-source SDKs that reflect the Stripe API in seven different programming languages. A vast majority of server-side Stripe integrations are built using our open-source SDKs. Our team also owns an in-house code generation framework, which we use to generate not just the SDKs, but the code snippets in our documentation and the commands in Stripe Shell, which is an in-browser version of the Stripe CLI. We are dedicated to providing a world-class experience for developers using our SDKs. We influence how Stripe authors and releases APIs so that SDKs and documentation represent them in a user-friendly way. We want to collaborate with and help our friends in the Stripe community who build and maintain SDKs in programming languages that we don't support. What you’ll do In this role, you'll have an opportunity to shape the experience of developers using Stripe SDKs that power over 80% of the payment volume at Stripe. Be the Golang expert on the team, representing the needs of the Golang community and ensuring we build experiences that are idiomatic Use your Node.js expertise to improve our code generation framework and work toward a future where we open source it to make it easier for third-party Stripe SDK owners to maintain their libraries Collaborate with various Stripe teams to release their APIs in the SDKs and improve the efficiency of the release process Help streamline the API authoring process at Stripe Support our users rea

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 Our team owns open-source SDKs that reflect the Stripe API in seven different programming languages. A vast majority of server-side Stripe integrations are built using our open-source SDKs. Our team also owns an in-house code generation framework, which we use to generate not just the SDKs, but the code snippets in our documentation and the commands in Stripe Shell, which is an in-browser version of the Stripe CLI. We are dedicated to providing a world-class experience for developers using our SDKs. We influence how Stripe authors and releases APIs so that SDKs and documentation represent them in a user-friendly way. We want to collaborate with and help our friends in the Stripe community who build and maintain SDKs in programming languages that we don't support. What you’ll do In this role, you'll have an opportunity to shape the experience of developers using Stripe SDKs that power over 80% of the payment volume at Stripe. Be the Golang expert on the team, representing the needs of the Golang community and ensuring we build experiences that are idiomatic Use your Node.js expertise to improve our code generation framework and work toward a future where we open source it to make it easier for third-party Stripe SDK owners to maintain their libraries Collaborate with various Stripe teams to release their APIs in the SDKs and improve the efficiency of the release process Help streamline the API authoring process at Stripe Support our users rea

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 Developer & End-user Experience Platform (DEEP) organization empowers all of Stripe's products with a shared product platform that helps with rapidly delivering high-quality, cross-product experiences across our UI and API surfaces. It focuses on providing a consistent and scalable developer experience that any developer (both internal and external) can leverage to accelerate a merchant's ability to create value using Stripe. Team matching — exact team matching for one of the subteams will begin during final stages. Please note we may also consider you for different orgs based on your experience, location, etc. More information on our team matching process can be found here . What you’ll do We're looking for Backend Engineers who want to make an impact on managing money at a global scale with a passion for building ergonomic APIs. You'll play a key role in extending our balance management platform and in building out a new funds accessibility platform that enterprises and SMBs use. Our team collaborates with many cross-functional teams—from Infrastructure to Product—at Stripe to deliver innovative solutions that address evolving user needs. Responsibilities Scope, design, build, and maintain APIs, services, and large-scale systems that reliably and efficiently handle billions of money movement requests Debug and solve critical production issues across services and multiple levels of the stack Mentor engineers to help them grow C