Back End Developer Jobs

Leidos has an exciting opportunity for a Principal Java Developer in our Intel Security Sector's Analysis Solutions Business Area . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos , we offer competitive benefits , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security! Job Summary A Java developer on this program provides Agile development and operations and maintenance for mission critical systems. Based in DevOps framework, this role participates in major deliverables of projects through all aspects of the software development lifecycle including scope and work estimation, architecture and design, coding and unit testing. Primary Responsibilities: Design, develop, test and maintain high-performance, scalable backend microservices using Java and the Spring Framework to meet customer information technology needs. Participates in software programming initiatives, shaping backend architecture, mentoring team members, and conducting code reviews. Develops and directs software system validation and testing methods using Junit and Katalon and uses integrated custom developed software solutions to leverage automated deployment technologies Develop, prototype and deploy solutions within a cloud-based platform leveraging platform services. Analyze (though proof of concept, performance, and end-to-end testing) and effectively coordinate Infrastructure needs driven by developed software to meet customer mission needs Support the Agil

We are a Leading Delhi Based Consultant, currently we are hiring for our client for Noida Location. Designation: Software Developer - React, PHP Desired Experience: 3 - 6 Years Qualification: UG: B.C.A. in Computer Applications (General), B.Tech / B.E. in Computer Science and Engineering (CSE) PG: M.Tech in Computers, MCA in Any Specialization. Job Location: Noida Sec - 61 (WFH/Work from Home Available) Total Employees: 80+ Members Working Days: Monday to Friday Key Responsibilities Develop and maintain web applications using React.js and PHP. Build reusable and responsive UI components. Design and develop RESTful APIs and backend services. Integrate front-end applications with backend APIs. Optimize application performance, scalability, and security. Troubleshoot, debug, and resolve application issues. Collaborate with designers, project managers, and other developers. Write clean, maintainable, and well-documented code. Participate in code reviews and follow development best practices. Manage database design, development, and optimization. Required Skills Frontend Strong experience with React.js. Proficiency in JavaScript (ES6+), HTML5, CSS3. Experience with Redux, Context API, or other state management libraries. Knowledge of responsive web design principles. Familiarity with Bootstrap, Material UI, or Tailwind CSS. Backend Strong experience with PHP. Experience with PHP frameworks especially CodeIgniter. Knowledge of REST API development and integration. Understanding of authentication and authorization mechanisms. Database Strong knowledge of MySQL/MariaDB. Experience in database design, optimization, and query performance tuning. Tools & Technologies Composer and NPM. Web servers such as Apache. Qualifications Bachelors degree in computer science, Information Technology, or related field. 3 - 6 years of experience in React.js and PHP development. Strong problem-solving and analytical skills. Good communication and teamwork abilities. Experience

About Supabase Supabase is the Postgres development platform, built by developers for developers. We provide a complete backend solution including Database, Auth, Storage, Edge Functions, Realtime, and Vector Search. All services are deeply integrated and designed for growth. About the Role Supabase is looking for an Event Programs Manager, Developer Community & Ecosystem to help grow and scale our developer community initiatives and industry event programs. You’ll work closely with the Head of Global Events and Field Marketing to build programs that connect Supabase with developers and the broader ecosystem. This includes initiatives such as meetups, workshops, hackathons, and community activations that bring Supabase into the spaces where developers learn, build, and collaborate. As an early member of the events team, you’ll help shape how Supabase shows up in person around the world while building the playbooks and frameworks that allow these programs to scale globally. This role sits within Field Marketing and works cross-functionally across Marketing, DevRel, Partnerships, Sales and Design to support programs that deepen developer engagement, strengthen ecosystem relationships. You will also support programming around Supabase Select, our flagship user conference, including partner and community programming connected to the event. We’re a lean, remote-first team, so this role requires someone who is comfortable operating independently, experimenting with new ideas, and helping build the systems that will power Supabase’s events program as it grows. What You’ll Do Own and Scale Community Programs Scale Supabase developer meetups, workshops, and hackathons globally Partner with DevRel to align community events with product launches and developer education initiatives Coordinate community meetups around major industry events and Launch Week Support community programming connected to Supabase Select Support the SupaSquad advocate network through community activ

Shape the Future with Dun & Bradstreet At Dun & Bradstreet, we believe data has the power to create a better tomorrow. As a global leader in business decisioning data and analytics, we help companies worldwide grow, manage risk, and innovate. Since 1841, businesses have trusted us to turn uncertainty into opportunity. We’re a diverse, global team that values creativity, collaboration, and bold ideas. Are you ready to make an impact and help shape what’s next? Join us! Explore opportunities at dnb.com/careers. The Role: We are seeking a highly skilled Full Stack Engineer to design, develop, and scale next-generation Data Quality and AI-enabled platforms. In this role, you will work across the entire technology stack—from intuitive user experiences and data visualizations to cloud-native backend services and data processing pipelines. You will partner closely with Data Quality SMEs, Data Engineers, Product Managers, Data Scientists, and Platform Teams to build solutions that support data observability, analytics, data governance, and AI-driven insights. You will help build the next generation of D&B's Data Quality Insights platform, enabling data governance, observability, analytics, and AI-powered decision support for enterprise data products.

Communication belongs to everyone. TextNow is one of the largest providers of free phone service in North America, connecting tens of millions of people who would otherwise be priced out of staying in touch. We pair a free, ad-supported tier with paid plans and a growing set of intelligent features — and we run it on infrastructure we own and operate. We move fast, we measure what we ship, and we treat AI as a core part of how we build, not a side experiment. What You'll Do As a Software Developer on iOS, you'll own the systems, architecture, and tooling behind apps used by millions — operating strategically across mobile, backend, and data, and diving into the lowest-level details when the problem demands it. This is an AI-first role: using AI is not optional, it's the expectation. We anticipate the majority of the code you ship will be AI-generated, with you as the architect, reviewer, and final authority on quality, correctness, and design. You'll have access to the latest and greatest AI development tools, and you'll help build our AI harness — the agents, workflows, evaluations, and guardrails the rest of engineering relies on. We hire across multiple levels (intermediate, senior, staff+) and align title and scope to demonstrated impact, not years on a résumé. • Design, develop, and sustain high-performance iOS applications in Swift, SwiftUI, and Objective-C, with AI tooling embedded throughout your workflow. • Own the full lifecycle of your systems: feature ideation, API design, instrumentation, CI/CD deployment, live-traffic monitoring, unit/UI/e2e testing, telemetry and data analysis, A/B experiment design, and continuous iteration. • Lead architectural modernization — decompose monoliths, build shared libraries and frameworks, improve modularization, and enable reuse across iOS, Android, and Web. • Evaluate and adopt new Apple platform capabilities (OS releases, device types, form factors, architectures) a

Communication belongs to everyone. TextNow is one of the largest providers of free phone service in North America, connecting tens of millions of people who would otherwise be priced out of staying in touch. We pair a free, ad-supported tier with paid plans and a growing set of intelligent features — and we run it on infrastructure we own and operate. We move fast, we measure what we ship, and we treat AI as a core part of how we build, not a side experiment. What You'll Do As a Software Developer on iOS, you'll own the systems, architecture, and tooling behind apps used by millions — operating strategically across mobile, backend, and data, and diving into the lowest-level details when the problem demands it. This is an AI-first role: using AI is not optional, it's the expectation. We anticipate the majority of the code you ship will be AI-generated, with you as the architect, reviewer, and final authority on quality, correctness, and design. You'll have access to the latest and greatest AI development tools, and you'll help build our AI harness — the agents, workflows, evaluations, and guardrails the rest of engineering relies on. We hire across multiple levels (intermediate, senior, staff+) and align title and scope to demonstrated impact, not years on a résumé. • Design, develop, and sustain high-performance iOS applications in Swift, SwiftUI, and Objective-C, with AI tooling embedded throughout your workflow. • Own the full lifecycle of your systems: feature ideation, API design, instrumentation, CI/CD deployment, live-traffic monitoring, unit/UI/e2e testing, telemetry and data analysis, A/B experiment design, and continuous iteration. • Lead architectural modernization — decompose monoliths, build shared libraries and frameworks, improve modularization, and enable reuse across iOS, Android, and Web. • Evaluate and adopt new Apple platform capabilities (OS releases, device types, form factors, architect

We believe that communication belongs to everyone. TextNow is redefining how people connect by combining simplicity, intelligence, and accessibility. We’re a team of curious builders using technology to make communication more affordable and powerful for millions of users every day. As a Software Developer - Android , you won’t just build apps—you’ll shape the systems, architecture, and tooling that make them possible. At TextNow, Members of Technical Staff combine leadership and hands-on coding to enable the highest leverage opportunities possible. Being able to operate strategically, as well as diving into the lowest leveldetails, is a must. You’ll take technical ownership of key mobile domains and work across mobile, backend, and data to create faster, smarter, more reliable products. AI and automation are at the core of how we build. You’ll use them to accelerate development, improve performance, detect and resolve issues faster, and continuously raise the bar for mobile development excellence. We’re hiring Members of Technical Staff across multiple levels (intermediate/senior/staff+). Whether you’re an experienced developer looking to lead complex systems, or an early-career developer eager to grow, we’ll align your title and scope based on experience and impact. This role is about impact at scale. You’ll shape how TextNow builds and operates its backend systems—using AI and automation to make development faster, decisions smarter, and experiences more seamless for millions of users worldwide. What You'll Do Design, develop, and sustain high-performance Android applications using Kotlin, Jetpack Compose, and Java. Lead architectural modernization and modularization to improve scalability and cross-platform reuse. Define and own the entire lifecycle of your systems: feature ideation, API design, instrumentation, deployment (CI/CD), live-traffic monitoring, unit/UI/e2e testing, use

Software Developer - Android (Canada) Waterloo, ON - Hybrid Communication belongs to everyone. TextNow is one of the largest providers of free phone service in North America, connecting tens of millions of people who would otherwise be priced out of staying in touch. We pair a free, ad-supported tier with paid plans and a growing set of intelligent features — and we run it on infrastructure we own and operate. We move fast, we measure what we ship, and we treat AI as a core part of how we build, not a side experiment. What You’ll Do As a Software Developer on Android, you’ll own the systems, architecture, and tooling behind apps used by millions — operating strategically across mobile, backend, and data, and diving into the lowest-level details when the problem demands it. This is an AI-first role: using AI is not optional, it’s the expectation. We anticipate the majority of the code you ship will be AI-generated, with you as the architect, reviewer, and final authority on quality, correctness, and design. You’ll have access to the latest and greatest AI development tools, and you’ll help build our AI harness — the agents, workflows, evaluations, and guardrails the rest of engineering relies on. We hire across multiple levels (intermediate, senior, staff+) and align title and scope to demonstrated impact, not years on a résumé. Design, develop, and sustain high-performance Android applications in Kotlin and Jetpack Compose, with legacy Java interop, and AI tooling embedded throughout your workflow. Own the full lifecycle of your systems: feature ideation, API design, instrumentation, CI/CD deployment, live-traffic monitoring, unit/UI/e2e testing, telemetry and data analysis, A/B experiment design, and continuous iteration. Lead architectural modernization — decompose monoliths, build shared libraries and frameworks, improve modularization, and enable reuse across Android, iOS, and Web. Evaluate and adopt new Android platform capabilities (OS rel

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. 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 Design and develop secure cloud-based services. Integrate designs with larger software systems. Coworker with cloud architect, backend, and frontend developer. Positive attitude and a strong commitment to delivering quality work. Requirements 3+ years of experience with developing cloud services. 3+ years of experience with Java is required. Experience with AWS cloud services. Experience with Linux and Docker environments. Have basic knowledge of webRTC, WebSocket, and MQTT. Have experience with developing RESTful API. Familiarity with the Agile software development processes. Ability to work independently within a high-talent team. Self-starter willing to learn a

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. You Will: Design, build, and maintain backend integrations using AWS services such as Lambda, S3, SQS, SNS, and EventBridge Develop API-based automations and orchestrate data flows between Salesforce, NetSuite, Workday, Snowflake, and other SaaS platforms Refactor and enhance legacy integration logic to align with modern architecture standards Own your code from design through CI/CD (GitLab) and deployment via Terraform/CloudFormation Collaborate with US-based engineers on shared initiatives, sprint planning, code reviews, and technical handoffs Participate in a shared production support rotation, resolving critical integration and data pipeline issues Partner with architects and BSAs to review integration design and testing strategies for reliability and resilience Support both ETL-style batch pipelines and real-time event streaming using CDC and platform events You Have: BS in Computer Science, related field, or equivalent industry experience 5+ years of experience in backend software development or automation using Node.js, Python, VS code or similar Strong experience with AWS services, especially Lambda, S3, SQS/SNS, EventBridge, DynamoDB Expertise in database design, schema modeling, and query optimization (DynamoDB & Snowflake preferred) Strong grasp of integration design patterns, secure API development (REST/SOAP), and system interoperability Develop and maintain GitLab based CI/CD pipeline implementations for tests, linting, deployment, etc. Experience with managing infrastructure as code (Terraform, Cl

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role Palantir's defense product vertical builds mission-critical products for the modern warfighter. We provide a complete ecosystem where customers can securely integrate and visualize their data, and build sophisticated, full-fledged programs such as common operating pictures, alert-triaging inboxes, and resource allocation planning tools driven by rich-ML models. Our customers use our defense offering to perform rich analyses that drive core operations within their organizations - these programs are relied upon for daily operations in the command centers and battlefronts of militaries across the world. This is a frontend engineering role focused on application development for our defense product offering, where you will be responsible for crafting the applications that organizations use every day to keep their countries safe. You will be architecting and developing interfaces to make sophisticated, data-intensive workflows both powerful and approachable, including to non-technical users. You may spend one day talking to users to better understand their needs and identifying product gaps to improve. The next day, you might find yourself putting that customer context to use and brainstorming how to handle intricate UX needs with your teammates. You’ll regularly face sophisticated technical problems, requiring you to scope out the solution design and finding an incremental path to shipping the new features. As part of this, you will own APIs and schemas that power your frontend code, and work with backend engineers in developing them together. You’ll be constantly exploring new horizons and building new skills in service of real world needs: between type theor

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role Palantir's defense product vertical builds mission-critical products for the modern warfighter. We provide a complete ecosystem where customers can securely integrate and visualize their data, and build sophisticated, full-fledged programs such as common operating pictures, alert-triaging inboxes, and resource allocation planning tools driven by rich-ML models. Our customers use our defense offering to perform rich analyses that drive core operations within their organizations - these programs are relied upon for daily operations in the command centers and battlefronts of militaries across the world. This is a frontend engineering role focused on application development for our defense product offering, where you will be responsible for crafting the applications that organizations use every day to keep their countries safe. You will be architecting and developing interfaces to make sophisticated, data-intensive workflows both powerful and approachable, including to non-technical users. You may spend one day talking to users to better understand their needs and identifying product gaps to improve. The next day, you might find yourself putting that customer context to use and brainstorming how to handle intricate UX needs with your teammates. You’ll regularly face sophisticated technical problems, requiring you to scope out the solution design and finding an incremental path to shipping the new features. As part of this, you will own APIs and schemas that power your frontend code, and work with backend engineers in developing them together. You’ll be constantly exploring new horizons and building new skills in service of real world needs: between type theor

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role Palantir's defense product vertical builds mission-critical products for the modern warfighter. We provide a complete ecosystem where customers can securely integrate and visualize their data, and build sophisticated, full-fledged programs such as common operating pictures, alert-triaging inboxes, and resource allocation planning tools driven by rich-ML models. Our customers use our defense offering to perform rich analyses that drive core operations within their organizations - these programs are relied upon for daily operations in the command centers and battlefronts of militaries across the world. This is a frontend engineering role focused on application development for our defense product offering, where you will be responsible for crafting the applications that organizations use every day to keep their countries safe. You will be architecting and developing interfaces to make sophisticated, data-intensive workflows both powerful and approachable, including to non-technical users. You may spend one day talking to users to better understand their needs and identifying product gaps to improve. The next day, you might find yourself putting that customer context to use and brainstorming how to handle intricate UX needs with your teammates. You’ll regularly face sophisticated technical problems, requiring you to scope out the solution design and finding an incremental path to shipping the new features. As part of this, you will own APIs and schemas that power your frontend code, and work with backend engineers in developing them together. You’ll be constantly exploring new horizons and building new skills in service of real world needs: between type theor

A World-Changing Company Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role Are you passionate about engineering quality, efficiency, and increasing the impact of engineers around you? Software Engineers at Palantir build software at scale to transform how organizations globally use data. As a Software Engineer on Developer Productivity, you’ll identify, develop, and drive investments to improve the velocity and quality of our engineering, as well as bolster the happiness and productivity of other developers. The role spans a spectrum of areas, such as build and software supply-chain systems, platform runtime environments, telemetry relating concurrency, memory/performance optimizations, and monitoring/alerting. Your primary users will be other developers at Palantir. They will be empowered with the software you develop to build capabilities used by research scientists, aerospace engineers, intelligence analysts, and economic forecasters in countries around the world. There will be opportunities to contribute to open source software, including projects maintained by others that we leverage. You’ll work autonomously within a community that will support and challenge you as you grow to become a strong technical contributor and engineering leader. The team is hiring for Frontend and Backend engineers. Core Responsibilities We're hiring engineers who are passionate about solving real-world problems and empowering developers to do their work optimally. If you’re motivated to develop reliable, performant, scalable systems and tools, here are some examples of the types of work you’d get to do: • Define and build standard practices for how services are operated and observed throughout their deployment • Build libraries and tool

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