Senior Backend Software Engineer Jobs

About LastPass LastPass delivers Secure Access Essentials, helping individuals and organizations manage and protect access to AI, applications, and credentials straight from the browser. Trusted by more than 100,000 businesses and millions of users worldwide, LastPass blends strong security with everyday simplicity. From discovering unapproved AI and applications to reducing login friction and securing credentials across the business, LastPass delivers on its mission to give everyone seamless access to everything they need to work, move fast, and stay protected as their environments evolve. Curious about our products? Visit our website and try it free! We welcome new ideas, support your growth, and recognize your value, if this aligns with what you are looking for in your next career move, Join Us! LastPass is looking for Senior Backend Engineer(.NET): In this role, you will evolve the commerce and payment platforms powering LastPass subscriptions. At this career level, you will modernize services and deliver reliable payment integrations — helping LastPass deliver on its mission to give everyone seamless access to everything they need to work, move fast, and stay protected. About the team: The Commerce engineering team sits at the heart of LastPass’s global commerce infrastructure. The team architects, scales, and maintains the backend platforms that drive e-commerce, billing, and payment processing. Working primarily in .NET, the team owns the critical systems that keep LastPass subscriptions running reliably for customers worldwide. If you are passionate about complex problem solving and motivated by scale, then this is the role for you! Who will you work with? You will work closely with fellow .NET engineers, SDETs, QA engineers, database developers, and engineering leaders to design, build, test, and support reliable commerce and payment services. You will also partner with teams across Product, Finance, Data, and Operations to deliver secure

About the job Senior Backend Engineer |100% Remote We are searching for a seasoned Sr Backend Engineer who will be responsible for developing and maintaining our backend systems, ensuring their efficiency, scalability, and reliability. The ideal candidate has a strong background in PHP and Java, with optional experience in Golang and Node.js. You should be well-versed in working with databases such as MongoDB, Redis, and Postgres, and have a solid understanding of cloud technologies, specifically AWS. Responsibilities Design, develop, and maintain backend systems and APIs to support our application's functionality. Collaborate with cross-functional teams, including front-end developers, product managers, and designers, to deliver high-quality solutions. Write clean, scalable, and well-documented code that adheres to industry best practices and coding standards. Perform code reviews and provide constructive feedback to peers to ensure code quality and consistency. Optimize and improve the performance of existing backend systems. Troubleshoot and debug production issues, providing timely resolutions. Stay up-to-date with emerging technologies and industry trends, identifying opportunities for innovation and improvement. Collaborate with DevOps teams to ensure smooth deployment and operation of backend services in the AWS cloud environment. Requirements Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent work experience). 5-10 years of professional experience as a Backend Engineer. Strong proficiency in Java/Golang is a must. Experience with Node js is a plus. In-depth knowledge of database technologies, including MongoDB, Redis, and Postgres. Solid understanding of cloud computing platforms, particularly AWS. Familiarity with containerization technologies such as Docker and orchestration tools like Kubernetes. Proficiency in writing efficient and optimized SQL queries. Experience with version control systems, such as Git. Excellent pr

Senior Backend Engineer (Python or PHP) - New York - ONSITE 4X Week — NY - New York, 1407 Broadway Floor 12. Apply via Workday.

At ClickUp, we're building the future of work: the first truly converged AI workspace unifying tasks, docs, chat, calendar, and enterprise search, all supercharged by context-driven AI. We are an AI-native company. Every team member is expected to leverage AI daily, and we evaluate AI fluency as part of our hiring process. Join us and help redefine what's possible. 🚀 ClickUp is seeking a talented and experienced Senior Search Engineer to join our team and help revolutionize our search capabilities. As a key member of our engineering team, you'll be responsible for optimizing and enhancing our search functionality, which is a critical feature of our platform and underpins our AI efforts. Your impact at ClickUp As a Senior Engineer on the Search squad, you'll be responsible for designing, optimizing, and scaling our search infrastructure. Our platform is built as backend services on top of Postgres and OpenSearch, focused on real-time search ingestion and serving. You'll work hands-on with these systems to ensure users can instantly find exactly what they need across their workspace. Your expertise will directly contribute to making ClickUp the most intuitive and responsive productivity platform available. Core Responsibilities Design and implement robust search solutions that scale with our rapidly growing user base Improve search relevance, accuracy, and speed to deliver the most relevant results to users at blazing fast speeds Improve our real-time indexing pipelines to ensure search results remain up-to-date Create measurement frameworks to evaluate and improve search quality Build and enhance vector search capabilities to power next-generation search experiences Collaborate with AI, backend, and product teams to integrate search into new features Troubleshoot complex search-related issues at scale Design and implement robust search solutions that scale with our rapidly growing user base Improve search relevance, accuracy, and speed to deliver the most relevant r

At ClickUp, we're building the future of work: the first truly converged AI workspace unifying tasks, docs, chat, calendar, and enterprise search, all supercharged by context-driven AI. We are an AI-native company. Every team member is expected to leverage AI daily, and we evaluate AI fluency as part of our hiring process. Join us and help redefine what's possible. 🚀 ClickUp is on the lookout for talented backend engineers to join the Fields squad at ClickUp! Fields is the heart and soul behind our custom task data - think dynamic schemas, high-volume updates, and the flexibility that lets users tailor ClickUp to their individual workflows. We’re building scalable, high-throughput, low-latency services that handle millions of requests daily. If wrangling distributed systems, fine-tuning performance, and designing robust APIs sounds like your idea of fun, let’s chat. Role: Build features and systems with attention to detail and performance. Own end-to-end development, from conception to production. Work closely with cross-functional stakeholders to deliver a world-class product. Identify and implement improvements to our existing systems. Help establish a fun, fulfilling, world-class engineering culture. Qualifications: Bachelor’s degree in Computer Science or equivalent major. 5+ years of experience engineering performant and high-throughput systems (ideally on Node.js). You write high quality code (ideally in TypeScript) and are uniquely productive. You have a track record of building performant, high-throughput systems. You have experience writing and debugging sql queries at scale. You have experience developing event based systems. You have experience with major cloud services (ideally AWS). You are an empathetic communicator. You are comfortable with ambiguity and have consistently delivered projects with little direction. You are product-minded and have a good intuition on what a great user experience looks like. #LI-REMOTE #LI-MAV Equal Opportunity Employer

Who Are We? Postman is the world’s leading API platform, used by more than 45 million+ developers and 500,000 organizations, including 98% of the Fortune 500. Postman is helping developers and professionals across the globe build the API-first world by simplifying each step of the API lifecycle and streamlining collaboration—enabling users to create better APIs, faster. The company is headquartered in San Francisco and has offices in Boston, New York, Austin, Tokyo, London, and Bangalore - where Postman was founded. Postman is privately held, with funding from Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Learn more at postman.com or connect with Postman on X via @getpostman. P.S: We highly recommend reading The "API-First World" graphic novel to understand the bigger picture and our vision at Postman. The Opportunity As a Senior Backend Engineer on the Cloud Platform team, you will play a key role in building the core systems and services that power Postman’s internal platform. You’ll help create new backend services that manage how we deploy, scale, and operate our infrastructure and product services, leveraging Java, Spring Boot, and Hibernate (JPA) on top of cloud-native technologies like Kubernetes, ArgoCD, Istio, and Terraform. This role is highly impactful: the systems you build will be used across Postman engineering, enabling faster delivery, better scalability, and a stronger developer experience. You’ll also have the opportunity to contribute to open source, shaping tools that extend beyond Postman’s boundaries. What You’ll Do Design and develop backend services in Java and Spring Boot to support Postman’s internal Cloud Platform. Architect new services that manage service deployment, lifecycle, and scaling across Kubernetes clusters. Implement GitOps workflows (ArgoCD) to support continuous delivery. Integrate with cloud-native tooling such as Istio, Helm, and Terraform. Apply strong soft

About the role: We are seeking a Senior Backend Engineer with deep backend engineering expertise and proficiency in one or more major programming languages (e.g., Python, Java, Go, Rust, or Kotlin), along with a strong understanding of AI models and agents. As a core member of our AI Engineering team, you will collaborate with data scientists, ML engineers, and product managers to build scalable, production-ready infrastructure and APIs that power intelligent systems. What you'll be doing: As a Senior Backend Engineer in the AI Engineering team, you will: Build and maintain reliable, scalable backend services to support AI agent execution and orchestration. Develop AI agent systems for complex operational workflows using LangChain, LangGraph, LiteLLM, and Langfuse. Orchestrate a hybrid model stack that includes OpenAI and Google Gemini alongside self-hosted and fine-tuned LLMs like Gemma and Llama. Build and maintain integrations with clinical systems (FHIR, EMR). Drive observability and reliability using OpenTelemetry, Datadog, and Langfuse. Design APIs (GraphQL, REST), background workers, and event-driven systems that interface with AI inference engines and agent runtimes. Collaborate with Data Science, ML, and engineering teams to deploy AI features and improve the performance, scalability, and reliability of backend systems. Participate in code reviews, knowledge sharing, and mentoring to elevate the team’s technical capabilities. What we're looking for: 6+ years of backend engineering experience, with strong proficiency in more than one major programming language (such as Python, Java, Go, Rust, or Kotlin). Solid understanding of AI systems architecture and experience working in environments involving AI agents, LLMs, or inference pipelines. Proven experience in building and scaling backend APIs, microservices, and background jobs. Strong experience with relational and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB, Redis), including schema des

Join us in building the future of finance. Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you’re ready to be at the epicenter of this historic cultural and financial shift, keep reading. About the Team: Bitstamp Exchange Platform Bitstamp made history in 2011 as the world’s first regulated crypto exchange. As a key part of the Robinhood family, the Exchange Platform team owns the full service lifecycle. We are the architects of a modern, high-velocity ecosystem that enables our global expansion, ensuring the world’s longest-running exchange remains unshakeable. The Role As a Senior Backend Engineer integrated into the Exchange Platform team, you will be a key driver of our modernization strategy. You will be an essential part of building the new generation infrastructure for low-latency services in the cloud, adopting cutting-edge technologies to drive our high-velocity ecosystem. This role is based in our London office(s), with in-person attendance expected at least 3 days per week. At Robinhood, we believe in the power of in-person work to accelerate progress, spark innovation, and strengthen community. Our office experience is intentional, energizing, and designed to fully support high-performing teams. Requires participation in an on-call rotation to support business needs. What You’ll Do Build Next-Gen Infrastructure: Architect and implement high-availability, low-latency cloud infrastructure that ensures performance and portability across our ecosystem. Modernize and Scale: Lead the transition of our services to modern, containerized environments, optimizing deployment and scaling workflows. Robinhood Ecosystem Integration: Manage and execute high-priority integration projects that align Bitstamp's backend with Robinhood's global infrastructure. Evolve the Stack: Identify and implement back

Who Are We? Postman is the world’s leading API platform, used by more than 45 million+ developers and 500,000 organizations, including 98% of the Fortune 500. Postman is helping developers and professionals across the globe build the API-first world by simplifying each step of the API lifecycle and streamlining collaboration—enabling users to create better APIs, faster. The company is headquartered in San Francisco and has offices in Boston, New York, Austin, Tokyo, London, and Bangalore - where Postman was founded. Postman is privately held, with funding from Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Learn more at postman.com or connect with Postman on X via @getpostman. P.S: We highly recommend reading The "API-First World" graphic novel to understand the bigger picture and our vision at Postman. The Opportunity We're looking for a Senior Backend Engineer to help us reinvent Postman's Notifications Platform for the next generation of AI-powered, agent-driven experiences. As Postman evolves to support agents and autonomous workflows, notifications become much more than simple alerts. They need to be contextual, intelligent, reliable, and deeply integrated into how users interact with the platform. You'll play a key role in building the foundation that makes that possible. This isn't a role focused on maintaining an existing system. It's an opportunity to rethink and rebuild a critical platform from the ground up that will power notification experiences across Postman for years to come. You'll have significant influence over the platform's architecture, reliability, and developer experience, working closely with teams across the company to build something scalable, intuitive, and easy to adopt. What You'll Do As a Senior Backend Engineer on the Messaging team, you'll help design and build the next generation of our Notifications Platform. Some of the things you'll work on include: Reimagining the platform to support agentic,

Join Delphi - Where Innovation meets transformation At Delphi, we believe in creating an environment where our people thrive. Our hybrid work model empowers you to choose where you work—whether it's from the office, your home, or a mix of both—so you can prioritize what matters most. We are committed to supporting your personal goals, family, and overall well-being while driving transformative results for our clients. We welcome exceptional talent from anywhere across the globe. Interviews and onboarding are conducted virtually, reflecting our digital-first mindset. Rooted in the region, we specialize in delivering tailored, impactful solutions in Data, Advanced Analytics and AI, Infrastructure, Cloud Security, and Application Modernization. Whether it’s enabling predictive analytics , transforming operations with automation, or driving customer engagement with intelligent platforms, we are the trusted partner for organizations ready to embrace a smarter, more efficient future. About the role We are seeking a seasoned and visionary Senior Backend Developer to lead technical initiatives and drive innovation across our client projects. This role bridges technical excellence with client engagement— architecting sophisticated solutions, mentoring junior talent, and translating complex business requirements into scalable, AI-powered applications. The ideal candidate is not just a developer but a technical leader who understands business processes, modern development practices, and can help drive transformative value for our clients using cutting-edge Python technologies and AI frameworks. Job responsibilities Architect and design scalable applications using FastAPI, implementing advanced features and optimization strategies Lead the development of sophisticated AI workflows using LangChain, LangGraph, and related frameworks for production environments Build complex Streamlit applications with custom components, advanced data visualizatio

About PayPay India Referral Hiring ▼About PayPay India Referral Hiring At PayPay India, we are strengthening our referral hiring activities (hiring through referrals from employees)! To be eligible for this program, applications must be made based on referral from an acquaintance or a friend who is currently working for PayPay India or PayPay corporation in Japan. If you can relate to the "PayPay 5 senses" which are important work values for PayPay group employees, you will surely enjoy working in this environment! Let's create the No. 1 fintech company together! To apply for a job opening, please click on the “ENTRY” button on this page and fill in the necessary information. Our Hiring team will be in touch with you soon! *1 To apply via this program, you need to fill in the name of the employee working at PayPay India Private Limited. or PayPay corporation in Japan. (the person who is referring you to the company). *2 After your application is complete, we may ask the employee you have stated in the form to confirm whether or not he/she has introduced you to the job opening. *3 This form must be completed by the applicant (no substitutions) Current Job openings at PayPay India Backend Engineer Senior Backend Engineer QA Engineer Product Designer Engineering Manager Senior Technical Program Manager Data Engineer ▼About PayPay India PayPay, a fintech company providing a service enjoyed by over 75 million users since its launch in 2018 in Japan. The company is now home to a very diverse team of members from more than 50 countries. We grew to a team of several thousand employees in Japan but are far from over. We are still in the Day 1. Every day, new members join us from all over the world to create new value and deliver it to society. Why India ? To build our Payment services, we got technical cooperation from Paytm (A large payment service company in India). And based on their customer-first te

At Playlist, life's richest moments happen when people step away from screens to move, connect, explore, and play. We're building the definitive platform for intentional living, connecting people with inspiring experiences in fitness, wellness, and beyond. With popular brands like Mindbody and ClassPass, Playlist empowers businesses and individuals, making it effortless for aspirations to become actions. Join us in reshaping technology's role to foster meaningful, real-world connections. Mindbody equips wellness entrepreneurs with technology to support thriving businesses and create exceptional experiences. Innovation and curiosity drive our culture, connecting businesses and individuals through cutting-edge solutions. Join us if you're passionate about enhancing wellness through technology. About the Role Every consumer experience Mindbody ships is built on top of our consumer platform. The platform is the shared foundation that lets our front-end squads deliver reliable, consistent wellness experiences without rebuilding the plumbing every time. This role exists to answer a deceptively simple question: what does the consumer platform need to become so that front-end squads can move fast on solid ground — and how do we get there from a legacy monolith without breaking the surfaces that depend on it today? This is a senior individual-contributor role for a product leader who is equally comfortable in two rooms: designing API contracts and service boundaries with a senior backend engineering team, and making the cross-surface platform calls that keep multiple consumer squads pulling in the same direction. You'll own the consumer platform roadmap, partner closely with engineering and your downstream partner squads, and be measured on how much faster and more reliably the rest of consumer can build because of the foundation you've shaped. What you'll do Own the consumer platform strategy and roadmap. Define the capabilities the platform must provide so consumer s

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ 🌏 Location: You can choose to work in Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, or Spain. Mission: Join us as a Backend Engineer to build the financial infrastructure that 600,000+ European SMEs depend on every day, from highly scalable APIs to robust banking services that handle real money, in real time, with zero room for mistakes. ➡️ As a Backend Engineer at Qonto, you will Design, build, deploy, and maintain services handling real financial transactions, owning reliability in production, not just at merge time Co-own service architecture, resilience, and scalability with respect to Domain-Driven Design principles Grow in technical leadership: lead design discussions, anticipate risks, and mento

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ 🌏 Location: You can choose to work in Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, or Spain. Mission: Join us as a Backend Engineer to build the financial infrastructure that 600,000+ European SMEs depend on every day, from highly scalable APIs to robust banking services that handle real money, in real time, with zero room for mistakes. ➡️ As a Backend Engineer at Qonto, you will Design, build, deploy, and maintain services handling real financial transactions, owning reliability in production, not just at merge time Co-own service architecture, resilience, and scalability with respect to Domain-Driven Design principles Grow in technical leadership: lead design discussions, anticipate risks, and mento

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ 🌏 Location: You can choose to work in Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain. Join us as a Backend Engineer to craft polished user experiences, highly scalable APIs and robust banking services, all to help create the finance solution all businesses love. As a Backend Engineer, you will be part of a team of 180 highly skilled back-end engineers from all over the world. You will work closely in cross-functional teams to shape our finance solutions. You will also take part in the direction of our banking product, manage how we will handle our ever-growing user base needs, and deliver high-quality products in a fast-paced environment. 👩‍💻🧑‍💻 As a Backend Engineer at Qonto,