Backend Developer Intern Jobs

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As a Senior Backend Engineer on the Plan: Spec-Driven Development team, you'll help build GitLab's intent-to-code loop: agentic workflows that turn a stated intent into a refined work item, an implementation plan, and verified, mergeable code. You'll own early-stage backend work across the flows, application programming interfaces, data models, and evaluation systems behind this experience, using Ruby on Rails, Python, PostgreSQL, GitLab Duo Agent Platform, large language model application programming interfaces, and an artificial intelligence gateway. You'll join a small, distributed team working on one

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As a Senior Backend Engineer on the Duo Chat team, focused on Chat Engine, you'll build the core AI capabilities behind GitLab Duo Chat, the natural-language and agentic interface to the GitLab DevSecOps platform. Much of your work will involve building flow components and agentic flows in the Flow Registry, the Python framework built on LangGraph within our Duo Workflow Service that powers agentic chat, and integrating them with the GitLab Rails monolith. You'll own complex backend features from start to finish across both services. You'll integrate large language models and orchestrate multi-agent flows

About Ubiquiti At Ubiquiti Inc., we create technology platforms for Businesses, Smart Homes, and Internet Service Providers, driven by our goal to connect everyone, everywhere. To date, Ubiquiti has shipped over 100 million devices worldwide, from ISP networking products to next generation of IT solutions. Our growth is made possible by the dedicated team of hundreds behind the scenes. From software developers and product managers to designers and strategists, Team UI is driven to achieve our common goal: Rethinking IT. At Ubiquiti, you’ll heighten your potential and broaden your horizons - all while shaping the future of connectivity. Responsibilities: Lead discussions on architecture and code decisions; Code review workflows, branch/merge strategy, building and deployment processes; Actively participate in all projects and voice your ideas and solutions; Maintain a good programming style and stay up-to-date with the latest technology and trends; Design developer-friendly APIs that are secure, scalable, and well-documented; Communicate complex technical topics with stakeholders – product managers, embedded, mobile and front-end developers, design UX. Requirements: 5+ years of experience with Node.js and TypeScript development; 5+ years of experience with SQL (Postgres or similar); Working knowledge of web security (OWASP, browser security model, OAuth); Excellent debugging and testing skills, and an eye for defensive programming; Solid knowledge about programming, design patterns and web protocols; Familiar with Git, Unix/Linux, Docker; Experience with AI tools - Claude, Codex, etc; Fluent in English and Latvian. Nice to have: Expertise in working with DevOps and Build pipelines; Rust, WebRTC, gRPC, Go. The project stack: Services in NodeJS (TypeScript) with PostgreSQL DB; Services in Rust; Frontend in React with real-time communication (WebRTC); Cloud services via AWS IoT. Benefits: International work environment and work with global development teams; Abilit

About Ubiquiti At Ubiquiti Inc., we create technology platforms for Businesses, Smart Homes, and Internet Service Providers, driven by our goal to connect everyone, everywhere. To date, Ubiquiti has shipped over 100 million devices worldwide, from ISP networking products to next generation of IT solutions. Our growth is made possible by the dedicated team of hundreds behind the scenes. From software developers and product managers to designers and strategists, Team UI is driven to achieve our common goal: Rethinking IT. At Ubiquiti, you’ll heighten your potential and broaden your horizons - all while shaping the future of connectivity. Responsibilities: Participate in the development of superior applications for iOS/iPad OS platforms; Ensure the performance, quality, and responsiveness of applications; Collaborate with the team to define, design, and ship new features to a high standard; Work closely with designers and other teams to ensure feature parity and high-quality experience across all platforms. Requirements: Passion for a great UI/UX, understanding of Apple’s design principles and interface guidelines; Proficient knowledge of Swift, SwiftUI and app life cycle; Knowledge of iOS frameworks (e.g. UIKit, SwiftUI, Combine); Familiarity with RESTful APIs/WebSocket to connect to back-end services; Familiarity with Swift code style guidelines; Experience with AI tools - Claude, Codex, etc. Fluent in English and Latvian. Benefits: International work environment and work with global development teams; Ability to deliver software that is used by millions of people across the globe; Opportunity to leverage and integrate modern AI tools into product development; Access to all Ubiquiti products; Medical insurance; Hybrid approach - office in Riga; Flexible work hours; Compensation package matching global standards, including competitive salary depending on your qualification and background (starting from 2500 up to 6000 Euro gross monthly); A-class office with all

Job Description: We are seeking a skilled Python Engineer to join our dynamic team. The ideal candidate will be responsible for developing robust web frameworks, building backend code to efficiently serve datasets, and performing data transformations to support our data-driven applications. This role requires a deep understanding of Python, web development frameworks, data processing, and database management. Roles and Responsibilities: Core Python: Be proficient in the concepts and features of the Python language , experienced with web frameworks like Flask and FastAPI for developing RESTful APIs, and skilled in asynchronous programming using asyncio. Experience with handling concurrent connections and optimizing I/O operations. Should have a deep understanding of microservices architecture and be capable of writing clean, efficient, and maintainable code. Security Best Practices and Requirements Understanding of security practices for microservices, including authentication, authorization, and encryption. Experience with securing APIs using OAuth, JWT, and API gateways. Web Framework Development: Design, develop, and maintain scalable web frameworks using Python. Collaborate with front-end developers to integrate user-facing elements with server-side logic. Ensure the web frameworks are secure, performant, and maintainable. Have a sound knowledge of one or more web frameworks that are based on Python, such as Django, Flask, Pyramid, etc. Should have the know how to use the framework's features, such as routing, templating, database integration, authentication, testing. Object Relational Mappers (ORMs): Develop backend systems to serve datasets through APIs and other interfaces. Implement data access layers, integrating with various databases and data storage solutions. Optimize backend code for performance, scalability, and reliability. Be able to use ORMs to interact with databases using Python objects. ORMs abstract away the low-level SQL queries and provi

Level Up Your Career with Zynga! At Zynga, we bring people together through the power of play. As a global leader in interactive entertainment and a proud label of Take-Two Interactive, our games have been downloaded over 6 billion times—connecting players in 175+ countries through fun, strategy, and a little friendly competition. From thrilling casino spins to epic strategy battles, mind-bending puzzles, and social word challenges, our diverse game portfolio has something for everyone. Fan-favorites and latest hits include FarmVille™, Words With Friends™, Zynga Poker™, Game of Thrones Slots Casino™, Wizard of Oz Slots™, Hit it Rich! Slots™, Wonka Slots™, Top Eleven™, Toon Blast™, Empires & Puzzles™, Merge Dragons!™, CSR Racing™, Harry Potter: Puzzles & Spells™, Match Factory™, and Color Block Jam™—plus many more! Founded in 2007 and headquartered in California, our teams span North America, Europe, and Asia, working together to craft unforgettable gaming experiences. Whether you're spinning, strategizing, matching, or competing, Zynga is where fun meets innovation—and where you can take your career to the next level. Join us and be part of the play! Position Overview Come join the team at Zynga making an impact across all of the company’s games - Central Technology! We focus on shared client & server tech that drives the core gameplay experience under the hood. We’re looking for outstanding engineers with a passion for technology and the desire to work in a team with dynamic strengths. The Senior Software Engineer will be working with a complementary team of software engineers to craft and maintain Zynga’s core Payments platform, which enables flawless integration with app stores, consoles, and payments processing providers. They will play a key role in helping architect, build and improve the next-gen framework for our games. What You'll Do: Design, code, and develop new backend applications/services running in AWS Optimize and refactor existing servic

Backend Engineer About LaunchDarkly Engineering LaunchDarkly helps engineering organizations ship software and AI with speed, safety, and control. Our platform gives teams the confidence to release gradually, target experiences to the right audiences, learn through experimentation, understand what is happening in production, and respond quickly when risk appears. Our engineers build the systems, services, SDKs, developer tools, cloud infrastructure, and product experiences that make this possible. The work spans high-scale distributed systems, reliable data and event pipelines, intuitive enterprise workflows, and AI-powered capabilities that help teams manage the next generation of software delivery. LaunchDarkly’s SDKs are used in systems that perform trillions of feature flag evaluations each day, giving our engineering work a direct connection to the reliability and customer experience of software around the world. As the company grows, we are expanding beyond traditional feature management into experimentation, observability, and AgentControl—helping customers control more of the software and AI lifecycle. That creates an unusually broad set of technical challenges, visible customer impact, and room for engineers to shape what comes next. We believe in the power of teams. We work with humility, openness, curiosity, and care; we value clear communication, thoughtful technical judgment, inclusive collaboration, and a strong sense of ownership. We encourage people to apply even when they do not meet every qualification listed below. We are interested in the experience, perspective, and potential you would bring to the role. About the role We have multiple backend engineering roles open on various teams. The specific level, scope, and technical focus will be aligned to the opportunity and the candidate’s experience. Experience with cloud platforms, distributed systems, developer tools, SDK engineering, data infrastructure, observability, or AI/agent systems may be r

About the role: We are hiring a Salesforce Commerce Cloud (SFCC) Full Stack Developer to own both the front-end experience and back-end architecture of our telehealth e-commerce platform. You'll work across a composable architecture leveraging Cloudflare Workers , Builder.io and S alesforce Commerce Cloud architecture, partner with external development agencies and internal teams, and help manage, optimize and develop the commerce systems supporting our telehealth business — including integrations with order management and telehealth servic e layer Key responsibilities: Development & Architecture Design and develop features across the Salesforce Commerce stack — Builder.io CMS, Cloudflare Workers, and other 3 rd party integrations Make engineering decisions for Telehealth systems and how they all work together. Make architectural recommendations working with our Architect and Senior Engineering Leadership Build and maintain custom integrations, and integrate third-party cartridges with necessary customizations to enable future Telehealth expansion Solve problems that span UI, business logic, and system integration Front-End Translate Sketch/Photoshop/Figma designs into pixel-perfect, cross-browser, responsive builds that leverage Builder.io Own front-end performance optimization (load time, rendering, asset delivery) Apply JavaScript patterns (MVVM, AMD/CommonJS) using React, ISML, and SASS Integrations & Platform Operations Set up, maintain, and troubleshoot integration feeds between SFCC, SOM, TeleHealth Middle Layer. Also have ability to set up, maintain, and troubleshoot integration feeds — products, inventory, price books, OMS, prescription/order data, Google Merchant, product reviews Manage OCAPI/SCAPI integrations, Cloudflare caching strategy, and cache invalidation

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As a Backend Engineer on the Plan: Spec-Driven Development team, you'll help build GitLab's intent-to-code loop: agentic workflows that turn a stated intent into a refined work item, an implementation plan, and verified, mergeable code. You'll own early-stage backend work across the flows, application programming interfaces, data models, and evaluation systems behind this experience, using Ruby on Rails, Python, PostgreSQL, GitLab Duo Agent Platform, large language model application programming interfaces, and an artificial intelligence gateway. You'll join a small, distributed team working on one of GitL

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As a Backend Engineer on the Plan: Spec-Driven Development team, you'll help build GitLab's intent-to-code loop: agentic workflows that turn a stated intent into a refined work item, an implementation plan, and verified, mergeable code. You'll own early-stage backend work across the flows, application programming interfaces, data models, and evaluation systems behind this experience, using Ruby on Rails, Python, PostgreSQL, GitLab Duo Agent Platform, large language model application programming interfaces, and an artificial intelligence gateway. You'll join a small, distributed team working on one of GitL

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 The Datalake team builds and maintains Stripe's foundational data access and governance infrastructure — the paved path for safe, fast, and compliant access to Stripe's critical big data assets. We serve developers, data engineers, analysts, ML and AI teams, security teams, and business users across the company. The team is in the middle of a significant architectural transition as Stripe grows. We are making Stripe's data lake a first-class citizen of the modern data ecosystem to support our growing scale and diverse workloads. What Makes This Role Compelling Foundational infrastructure with broad reach: The Datalake team's systems sit in the critical path of nearly every data workload at Stripe. Decisions affect petabytes of data, hundreds of production pipelines, and every engineering team that builds on Stripe's data lake. Multi-cloud architecture design and transition: You will lead the strategy to transition to a multi-cloud architecture and implement disaster recovery plans. Active, high-stakes, OSS-aligned architectural transformation: You will lead a multi-year migration to modern, open-source solutions like the Apache Iceberg. This is a technically deep project involving critical architectural choices at each step, from API design and compute engine integration to authorization models, where your opinions and technical influence will directly shape how the platform engages with the broader data infrastructure ecosystem. A

We are looking for a Full Stack Developer to join our growing engineering team. In this role, you will design, build, and operate scalable software platforms that support analytics and AI solutions — owning the full journey from intuitive user interfaces to robust cloud-native backends. What This Involves: Front-End Development Develop and maintain user interfaces for web applications using React and Next.js. Translate wireframes and design mockups into functional, accessible UI components. Identify and resolve front-end performance bottlenecks to ensure smooth user experiences. Write and maintain unit and integration tests for front-end components (e.g. Jest, React Testing Library). Back-End Development Develop and maintain high-quality back-end services and APIs using Python. Deploy, operate, and monitor applications in cloud environments (AWS, Azure, or GCP). Manage containerized applications using Docker and Kubernetes. Contribute to the design and evolution of scalable, cloud-native software architectures. Contribute to and maintain CI/CD pipelines for web and back-end applications. Collaboration and Quality Work closely with data scientists, engineers and project managers to deliver integrated end-to-end solutions. Support the development and deployment of AI and analytics solutions. Write clean, well-documented, and maintainable code across the full stack. Participate in technical discussions, code reviews, and continuous improvement initiatives. Adhere to internal and client-mandated data protection and compliance policies, ensuring all handling, storage, and sharing of data meets required security and privacy standards. Requirements: Bachelor’s degree in Computer Science or related fields. 5+ years of software development experience, with meaningful time on both front-end and back-end systems. Experience designing systems in cloud-native or distributed environments is a plus. Excellent communication and collaboration skills — comfortable working acros

Frontend Developer Particle41 is seeking a talented and versatile Frontend developer to join our innovative team. As a frontend developer, you will play a key role in designing, developing, and maintaining end-to-end software solutions that meet our clients' needs. You will work on both front-end and back-end technologies, collaborating with cross-functional teams to deliver high-quality products. This is an exciting opportunity to have an impact on projects and grow your skills in a supportive and dynamic environment. In This Role, You Will: Software Development Develop and maintain web applications using a combination of front-end and back-end technologies. Design responsive and user-friendly interfaces using modern JavaScript/TypeScript frameworks such as Next.js, React.js or Angular and front-end CSS frameworks like Tailwind and Bootstrap Implementing server-side logic and database integration using languages like Node.js, Python, or PHP and database technologies like ORMs, MySQL, MongoDB, or PostgreSQL will be an added advantage. Write clear and concise documentation for APIs, including usage guides and code examples, to facilitate integration by internal and external developers. Basic understanding of Open API specifications. Write clean, efficient, and well-documented code following industry best practices and coding standards. Strong understanding of the Javascript ecosystem and architecture and integrations with popular third-party libraries. Implement API authentication and authorization mechanisms, such as OAuth, JWT, or API keys, to ensure data security and privacy. Requirements Gathering and Analysis Collaborate with designers, product managers, and other stakeholders to gather requirements and translate them into technical solutions. Participate in requirement analysis sessions to understand business needs and user requirements. Provide technical insights and recommendations during the requirements-gathering process. Agile Development Participate in Ag

The Angular Developer / Frontend Engineer is an entry-level software engineering role responsible for developing, enhancing, testing, and maintaining modern web applications using Angular and related frontend technologies. This position is ideal for candidates early in their software engineering career who are passionate about building user-focused applications and learning modern development practices. The successful candidate will work closely with senior engineers, product partners, and other technology teams to deliver high-quality software solutions. This role provides an opportunity to gain hands-on experience with Angular, TypeScript, Micro Frontend architecture, automated testing, APIs, and modern CI/CD practices while contributing to enterprise-scale applications. Responsibilities : Angular Development Develop and maintain Single Page Applications (SPAs) using Angular. Build reusable Angular components, directives, and services following established coding standards and best practices. Contribute to the development of Standalone Components and modular application features. Support application modernization efforts and continuous improvement initiatives. Frontend Engineering Translate business requirements, wireframes, and design specifications into responsive user interfaces. Develop user-facing features using HTML5, CSS3, SCSS, TypeScript, and Angular. Create accessible and responsive experiences across desktop and mobile platforms. Partner with UX designers and product teams to deliver intuitive user experiences. API Integration & Application Support Integrate frontend applications with RESTful APIs and backend services. Participate in troubleshooting, debugging, and resolving application defects. Support production applications by investigating and addressing issues when

Role Overview: Citi is seeking a highly motivated Senior Software Engineer to join the Finance Engine Hedge Fund Billing technology team. In this role, you will be instrumental in designing, building, and enhancing high-throughput, enterprise-grade billing and calculation engines that serve institutional hedge fund clients globally. The Hedge Fund Billing platform is a mission-critical financial system that handles complex fee structures and high-volume transactional processing across multiple business lines. You will work closely with product managers, business analysts, and technical leads to deliver scalable, resilient, and cloud-ready full-stack solutions using Java , Angular , and MSSQL technologies. Key Responsibilities: 1. Architecture, Design & Full-Stack Engineering Design, develop, test, deploy, and maintain robust full-stack applications leveraging Java microservices and modern Angular frontends. Architect modular, extensible services capable of performing high-volume calculations. Develop interactive, intuitive user interfaces and operational dashboards in Angular , ensuring seamless user experience, state management, and performance. Write clean, well-documented, testable, and maintainable code adhering to Citi's engineering standards and design patterns. 2. Database Engineering & Performance Optimization Design efficient relational database schemas, complex SQL queries, stored procedures, indexing strategies, and views for high-performance financial data processing. Profile and optimize backend queries and API performance to ensure low-latency data retrieval and reliable processing of large billing datasets. Ensure data integrity, transactional consistency (ACID compliance), and audit