Full-Stack Senior Developer (Flutter, Node.js React/Vue)

@AwaisChaudhry

Hello, I understand you need a senior Full‑stack Developer skilled in Flutter, Node.js, and React or Vue, with ServiceNow UIB builder and seismic events experience. I will take a practical, end‑to‑end approach to both build new features and maintain existing systems, prioritizing robust debugging and clear communication. My plan is to rapidly assess the current codebase, define milestones, implement scalable Node.js APIs, build responsive frontends in React or Vue, and deliver Flutter mobile components, while integrating ServiceNow workflows and seismic event handling. I will ensure thorough error handling, testing, logging, and documentation, and provide steady progress updates in a collaborative environment. I can commit 1-2 hours daily with extra weekend time, and I’m aiming for a long‑term engagement (6+ months). Do you have a current repo and access to the ServiceNow environment? What are the top 3 features or modules to deliver in the first 90 days? Do you prefer React or Vue for frontend, and any constraints on Flutter features? What are the main debugging pain points with ServiceNow UIB builder and seismic events? What is your expected collaboration model, deployment cadence, and timezone overlap? Best regards,

@leadconcept

Greetings, I understand you are seeking a Full stack Senior/Lead Developer with expertise in Flutter, Node.js, and React/Vue, to both enhance existing systems and build new features, particularly within the ServiceNow framework using UIB builder and seismic events. The focus is maintaining stability, solving complex issues, and delivering solutions efficiently in a collaborative environment. Before we proceed, I would like to clarify a few things. 1, Are there existing mobile apps in Flutter that require ongoing feature development, or is this primarily new build work. 2, Which ServiceNow modules or customizations are most critical for immediate attention. 3, Are there preferred tools or workflows for debugging and task tracking in this project. Our team includes senior developers experienced in Flutter mobile apps, Node.js backend development, React/Vue frontends, and ServiceNow platform integrations. We specialize in understanding complex existing codebases, debugging challenging issues, and implementing robust solutions while maintaining reliable communication and long term collaboration. Let us connect to discuss feature priorities, timelines, and ongoing engagement structure. The current bid amount is a placeholder to start the conversation. Regards Yasir LEADconcept PS: Let me know, if you want to see our team past work to determine our skills/expertise or past customer's references.

@tangramua

Dear ,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in JavaScript, HTML5, HTML, Debugging, Node.js, React.js, Full Stack Development, Vue.js, Flutter, ServiceNow and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.   Best regards, Sales department Tangram Canada Inc.     

@divumanocha

Hello, I came across your project and found it truly interesting. With over eight years of hands-on experience in this field, I have successfully delivered high-quality solutions to clients worldwide. My dedication to excellence is reflected in the 180+ positive reviews from satisfied clients. I’d love to bring this expertise to your project and ensure outstanding results. However, I do have a few important points I’d like to clarify to align perfectly with your vision. Let’s connect via chat, where I can also share relevant examples of my past work. I'm looking forward to hearing back from you! Best Regards, Divu.

@extreamcode

Hi, I've carefully reviewed your need for a seasoned Full-Stack Senior Developer skilled in Flutter, Node.js, and React/Vue, especially your focus on debugging complex issues within the ServiceNow platform using UIB builder and seismic events. With extensive experience in full-stack JavaScript development and mobile app projects in Flutter, I excel at swiftly grasping existing codebases and enhancing system functionality with a solution-driven mindset. I specialize in both backend and frontend development and possess strong task management capabilities necessary for maintaining and building robust features collaboratively. I understand the importance of a responsive communication approach for your long-term engagement and daily dedicated commitment requirements. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Could you share more about the current architecture and existing challenges you're facing with the ServiceNow platform integration? Thanks, Asad

@asifalimzd

Hi there, I am an experienced Full-Stack Senior/Lead Developer with strong expertise in Flutter, Node.js, and React/Vue, as well as JavaScript fundamentals and debugging complex applications. I have worked on maintaining and enhancing existing projects, building new features, and resolving challenging platform issues. I am familiar with ServiceNow, including UIB builder and seismic events, and can quickly understand your existing codebase to provide reliable, solution-oriented development. I can commit 1–2 hours daily, with flexibility on weekends, for a long-term engagement. Happy to collaborate and ensure smooth progress on your project. Thanks

@SBITServices

Hi Invatu Technologies FZLLC, I am an experienced Full-stack Senior Developer proficient in Flutter, Node.js, and React/Vue. With expertise in JavaScript, mobile app development, backend and frontend technologies, I can effectively maintain and enhance projects, debug complex issues, and collaborate in a dynamic work environment. Let's discuss further. Regards, Sai Bhaskar

@Julian29

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I have 11+ years of full-stack development experience, including Flutter, Node.js, and React/Vue, and confidently understand your requirement. The goal is to enhance and maintain your platforms while delivering new features efficiently, with robust debugging and scalable solutions. Core features -->> Flutter mobile front-end development -->> Node.js backend enhancements -->> React/Vue web interface improvements -->> ServiceNow UIB builder & seismic events handling -->> Debugging and performance optimization My approach: clean, modular code with maintainable architecture, secure APIs, and collaborative workflow using agile best practices. I’d like to connect in chat to review your existing codebase and align on priorities for a smooth long-term engagement. Thanks, Julian

@Microlent

I noticed this isn’t about greenfield development, it’s about stepping into an existing ServiceNow-based system, understanding it fast, and fixing real issues while extending it safely. That’s senior work, not feature-churning. My strength here is debugging-first development. I’m very comfortable tracing complex JavaScript flows across frontend (React/Vue), Node.js backends, and platform-specific layers like ServiceNow UIB Builder and event-driven (seismic) behavior. I don’t guess — I instrument, isolate, and fix without destabilizing the system. On the stack side: * Flutter: production mobile apps, state management, API-driven flows * Node.js: maintaining and extending existing backends, not rewriting * React/Vue: working inside mature codebases, handling legacy patterns * ServiceNow: UIB Builder, event handling, UI logic, and platform quirks I’ve spent years maintaining operational systems where the real value was understanding someone else’s architecture, diagnosing edge cases, and shipping fixes that actually stick. That mindset fits long-term engagements far better than “feature-only” developers. Happy to start with a focused debugging or enhancement task to validate fit before committing long term. Best regards, Jenifer

@DeveloperStation

Hi there, I’ve been leading full-stack development for over 15 years, with extensive experience in JavaScript, Node.js, React, Vue, and Flutter. I’ve built several large-scale products, including a multi-vendor marketplace that integrated with multiple third-party APIs and payment gateways. As a dedicated developer, I’m always available to address urgent issues, even outside regular hours. I’m also a strong advocate for agile methodologies, ensuring that we deliver the most valuable features first. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best, Adil

@bestsolz1

I’m a Senior JavaScript + PHP developer and I can take the lead on this. I work with modern JS stacks, Codeiginter, laravel and I’m strong in debugging, feature rollout, and managing existing codebases. I’m used to stepping into ongoing products, mapping the architecture, and improving stability + delivery speed. I’m reliable, communication-focused, and can commit daily + weekends when needed for long-term partnerships. Let’s discuss details and technical environment so I can get started.

@corpmember29

Hello, I have carefully reviewed your requirement for a Full-Stack Senior/Lead Developer with expertise in Flutter, Node.js, and React/Vue, along with ServiceNow UIB builder experience. I bring 10+ years of full-stack development experience, strong JavaScript fundamentals, and extensive debugging skills across complex platforms. I can quickly understand existing codebases, maintain and enhance systems, and deliver new features efficiently. I am comfortable with Flutter mobile apps, Node.js backends, and React/Vue frontends, and have experience working with enterprise frameworks like ServiceNow, including seismic events. I work with agile methodology, provide clean, maintainable code, and ensure responsive communication. I WILL PROVIDE 2 YEAR FREE ONGing SUPPORT AND COMPLETE SOURC CODE, WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO PUBLISHING ON STORES. I am available for the daily commitment and long-term engagement you outlined. I eagerly await your positive response. Thanks.

@elishadiah326

Hi, Thank you for posting this interesting long-term task! As a skilled full stack developer, my main skills are in React / Vue, Node.js and Flutter, so I have a deep focus on JavaScript fundamentals and advanced debugging. Plus, I’ve worked on maintaining and extending existing systems where the priority was understanding complex codebases, validating data accuracy, and hardening apps for real-world usage rather than rebuilding from scratch. Recently, I’ve handled projects involving Node.js backends integrated with React/Vue frontends, debugging production issues, and optimizing performance under challenging platform constraints. I also have hands-on experience working with enterprise platforms similar to ServiceNow, including event-driven architectures and UI builders, where careful troubleshooting and system understanding are critical. My approach is solution-oriented, well-organized, and focused on reliable delivery within daily time commitments. I’m comfortable collaborating long-term, being responsive, and jumping into complex debugging when needed. For coding standards, I usually follow Airbnb JavaScript guidelines, but I’m flexible to align with your existing setup. You can review my profile and client feedback here: https://www.freelancer.com/u/elishadiah326 Looking forward to contributing to your team and supporting this project over the long term. Best regards, Diah

@iglobalvn

Hello, I’m a Senior Full-Stack Developer with strong experience across Flutter, Node.js, and React/Vue, and I’m comfortable stepping into existing, complex systems to debug, stabilize, and extend them over the long term. I have deep JavaScript fundamentals and a methodical debugging approach, which is essential for platforms like ServiceNow, including work with UI Builder and event-driven (seismic) flows. I’m used to inheriting live systems, understanding them quickly, and improving them without disruption. How I can support your team: • Build new features in Flutter, Node.js, React/Vue • Maintain and enhance existing codebases with minimal risk • Debug complex, hard-to-trace issues across frontend, backend, and platform layers • Work within ServiceNow UIB builder and event-based architectures • Manage tasks independently while collaborating smoothly with the team I’m comfortable committing 1–2 hours daily, with flexibility for additional time when needed, and I’m looking for a long-term (6+ months) engagement where consistency and reliability matter. I communicate clearly, document fixes when appropriate, and focus on solutions—not just identifying problems. Please feel free to send me a private message so we can discuss your current projects, ServiceNow setup, and expectations in more detail. Best regards,

@royalwebraisers

Hi, I understand the project involves enhancing and maintaining your existing systems while building new features using Flutter, Node.js, and React/Vue, with integration into ServiceNow (UIB builder & seismic events). I will share my portfolio on your first message. Implementation Approach: • Analyze and understand the existing codebase for mobile and web platforms • Develop new features in Flutter (mobile) and React/Vue (web) with Node.js backend support • Debug and resolve complex issues, including ServiceNow integrations • Ensure robust testing and maintainable, well-documented code Queries: • Are there specific modules in ServiceNow requiring immediate attention? • What is the expected frequency of new feature releases? • Are there any existing CI/CD pipelines or preferred deployment workflows? Kindest Regards,

@enervell

Hi, there. I have strong experience working as a Senior/Lead Full-stack Developer, building and maintaining complex systems using Flutter, Node.js, and React/Vue, with a heavy focus on debugging, stability, and long-term scalability. My approach I start by quickly understanding the existing codebase and architecture, then work in small, controlled iterations to add features, fix issues, and improve reliability without disrupting ongoing operations. I’m highly solution-oriented and comfortable owning tasks end-to-end. Frontend • Flutter for mobile development with clean state management • React / Vue for web interfaces and component-driven UIs • Strong JavaScript fundamentals and deep debugging experience • Ability to adapt and enhance existing UI logic rather than rewrite unnecessarily Backend • Node.js APIs with clean, maintainable architecture • Strong experience debugging complex backend flows • Performance tuning, logging, and issue isolation • Comfortable working inside large, evolving systems I’m used to long-term collaboration, daily focused contributions (1–2 hours), and stepping in during critical moments when deeper debugging is required. Clear communication, reliability, and accountability are core to how I work. I can start immediately and commit long-term. Looking forward to discussing how I can support this project’s success. Thanks, Luis

@durgesh8527

Drawing from my extensive 12 years of experience as a Full Stack Software Engineer, I'm adept at utilizing the JavaScript ecosystem (including Node.js, React.js, and Vue.js) to deliver top-tier results. These skills perfectly align with your project seeking Flutter and web development expertise. Familiarity with ServiceNow's UIB builder and seismic events also ensures that I could hit the ground running without the typical onboarding delays associated with such enterprise platforms. One aspect that sets me apart from fellow developers is my proven problem-solving and debugging ability. This has been honed over years, handling intricate projects and providing sustainable solutions in a timely manner. Given this project demands an ongoing commitment of 1-2 hours daily, I assure you of my passion for what I do and how I aim for continued brilliance - qualities that are vital for someone joining a team for the long term as you've indicated.

@rbtech1984

Hello There!!! ⚜⭐⭐⭐⭐⚜(( Full-stack development and enhancement with Flutter, Node.js, and React/Vue ))⚜⭐⭐⭐⭐⚜ I understand you need a senior full-stack developer to maintain and enhance your existing systems while building new features. This involves Flutter mobile apps, Node.js backends, and React/Vue frontends, along with ServiceNow UIB builder and seismic events integration. My focus would be quickly understanding your codebase, resolving complex bugs, and delivering stable, scalable solutions. I bring deep experience in full-stack JavaScript, Flutter mobile development, and backend Node.js architectures, plus a track record of debugging and optimizing challenging platforms. Key features: 1. Full-stack development (Flutter, Node.js, React/Vue) 2. Debugging and maintaining existing systems 3. ServiceNow UIB builder and seismic event integrations I am ready to start and collaborate efficiently for long-term success. Warm Regards, Farhin B.

@ayesha0124

Hi there, I am excited about the opportunity to work as your Full-Stack Senior Developer. With extensive experience in Flutter, Node.js, and both React and Vue.js, I am confident in my ability to deliver high-quality solutions tailored to your needs. My proficiency in JavaScript allows me to troubleshoot and debug complex challenges effectively, ensuring smooth integration of new features while maintaining existing systems. Having worked with frameworks like ServiceNow, I am well-prepared to tackle enhancements using UIB builder and manage seismic events. My approach is solution-oriented, and I'm committed to delivering results in a timely manner. Given your requirement for a long-term engagement, I am available for 1-2 hours daily, with flexibility for weekends as necessary. Let's discuss how I can contribute to your project and drive success. Best regards,