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Senior Full-Stack Software Engineer Company: OneUs Global Services Location: Remote / Hybrid (Nigeria-based preferred) Engagement: Contract (with possibility of long-term engagement) About OneUs Global Services OneUs Global Services is building a digital execution platform that enables individuals and organizations to manage inter-location operations, fieldwork, and delegated tasks at scale. Our platform combines workflow orchestration, verification, reporting, and accountability into a single operational system. We are building an execution infrastructure for distributed work. Role Overview We are seeking a Senior Full-Stack Software Engineer to help take our platform from MVP to production-grade system. You will be responsible for designing, building, and hardening core product features across the frontend, backend, and data layers. This role requires strong product thinking, architectural judgment, and the ability to ship reliable systems. Key Responsibilities • Design and implement scalable web application features end-to-end • Translate product requirements into robust technical solutions • Build and maintain frontend applications (React or similar) • Build and maintain backend services and APIs • Design and manage relational data models and application data flows • Implement authentication, authorization, and role-based access control • Ensure system reliability, performance, and security • Improve code quality through reviews, refactoring, and architecture improvements • Collaborate with product and operations to refine workflows and business logic • Prepare the platform for production deployment and future scaling Required Experience • 5+ years experience building production web applications • Strong experience with modern frontend frameworks (React, Vue, or similar) • Strong backend experience (Node.js, Python, Ruby, or similar) • Solid understanding of relational databases and data modeling (PostgreSQL, MySQL, etc.) • Experience designing APIs and application architectures • Experience with authentication systems and permission models • Comfortable working with Git, environments, and deployment workflows • Able to reason about system design, not just write features Nice to Have • Experience building workflow or operations platforms • Experience with dashboards, internal tools, or admin systems • Experience working on B2B or operational software • Experience with cloud infrastructure (AWS, GCP, etc.) • Experience taking products from MVP to production What We Value • Engineering maturity and sound judgment • Ability to think in systems, not just components • Bias for clarity, simplicity, and maintainability • Ownership mentality • Comfort operating in ambiguous, fast-moving product environments Engagement & Compensation • Contract engagement (3–6 months initial) • Possibility of long-term or permanent engagement • Competitive, experience-based compensation How to Apply Send: • Your CV or LinkedIn profile • Links to projects or GitHub (if available) • A short note explaining what you’ve built and your role in it
Projektin tunnus (ID): 40160781
230 ehdotukset
Etäprojekti
Aktiivinen 22 päivää sitten
Aseta budjettisi ja aikataulu
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Rekisteröinti ja töihin tarjoaminen on ilmaista
230 freelancerit tarjoavat keskimäärin $459 USD tätä projektia

Hello, As the head of a reputable and innovative software company, I believe my expertise lines up perfectly with your project requirements. In my 5+ years of experience, I have designed and launched numerous production web applications incorporating robust technical solutions to translate product requirements. I'm well-versed in React (or similar) for frontend and Node.js/Python/Ruby for backend development. This not only allows me to build scalable features but also implement those while ensuring rock-solid system reliability, performance, and security. Additionally, I bring solid knowledge in relational databases, data modeling along with experience in designing APIs, and implementing authentication and role-based access control. My capacity to reason about system design, not just write features is a valuable asset that will contribute to driving your product from MVP to production grade. I have also catered several projects that required integrating third-party APIs and entities for services like booking, verifications etc., which aligns well with your project focus on managing inter-location operations and delegations as well. Seamless user experience combined with robust functionalities has always been my strength evident by positve client feedback over the years. As we aim for longterm engagements, I offer my dediciation in providing an exceptional service matched by timely delivery and competitive pricing. Thanks!
$450 USD 6 päivässä
8,6
8,6

I have extensive experience in PHP, Website Design, Graphic Design, HTML, and Node.js, making me a great match for the Comprehensive Service Booking Website -- 2 project. I am confident in my ability to deliver high-quality work within your budget and timeframe. Please review my 15-year-old profile to see my past work. Your satisfaction is my priority, and I am eager to discuss the project details and showcase my commitment. Looking forward to hearing from you.
$525 USD 10 päivässä
8,8
8,8

" Lets Gets Started, You are looking for Comprehensive Service Booking Website -- 2 I know you have several tempting proposals here, but I guarantee you to be impressed by my work. I have various skills in Graphic Design, Node.js, Web Development, HTML, Vue.js, UI / User Interface, Website Design and PHP. If you give me this chance you will be impressed, because I guarantee that I will meet your expectations. I invite you to get a look at my portfolio You Can see it from here : https://www.freelancer.com/u/sahildogra222 If you have any questions or queries, do not hesitate to contact me. I hope to start working with you. With regards! Sahil
$250 USD 1 päivässä
8,3
8,3

Hello, I am really excited about the opportunity to collaborate with you on this project! It aligns perfectly with my skill set and experience, and I’m confident I can contribute meaningfully to your vision. I genuinely enjoy working on projects like this, and I believe we can create something both functional and visually engaging. Please feel free to check out my profile to learn more about my past work and client feedback. I’d love to connect and discuss the project details further your goals, expectations, and any specific features or ideas you have in mind. The more I understand your vision, the better I can bring it to life. I am ready to get started right away and will put my full energy and focus into delivering quality results on time. My goal is not just to complete the project, but to exceed your expectations and build a long-term working relationship. Looking forward to hearing from you soon! With regards! Nikhil
$750 USD 7 päivässä
8,1
8,1

As a Full-Stack Software Engineer with extensive experience in building and delivering robust, scalable web applications over the past 5+ years, I firmly believe that I possess the technical acumen and product-oriented mindset required to excel in this role at OneUs Global Services. I have not only worked with modern frameworks like React on frontend and Backend technologies such as Node.js, Python (similar to your preferences) but also designed APIs, databases, and implemented authentication systems akin to what you're seeking. Moreover, my strong grasp on Git and deployment workflows makes me adept at ensuring system reliability and security. Having an innate ability to think globally about systems, I don't just write features but focus on building platforms that work optimally together. It's worthwhile to mention that my experience also extends to operational software and cloud infrastructure like AWS or GCP which I'm sure can be of great value for your execution infrastructure project. Lastly, my commitment to engineering maturity, simplicity, and maintainability reson
$250 USD 2 päivässä
8,0
8,0

With a solid 8+ years of professional experience in Web/App Development and Designing, I believe I possess the technical prowess and attention to detail required for your project. In particular, my strengths align perfectly with your requirements for building scalable web application features, designing APIs, working with relational databases like PostgreSQL and MySQL and much more. Over the years, my work in similar domains comprising systems like booking platforms, event portals and custom ticketing systems have honed my skills to contribute meaningfully to OneUs Global Services' project. My skills with modern frontend frameworks like React.js/Node.js/Vue.js, authentication systems and permission models along with my ability to reason about system designs instead of simply writing features make me well-suited for developing a comprehensive service booking website for your platform. Notably, I've been engaged with different APIs including Shipstation, Quickbook, Saleforce, Amazon, Ebay, Xero which can lend a lot of value to this assignment. I take pride in delivering top-notch work within defined timelines. My focus on quality accompanied by an ownership mindset aligns effectively with OneUs Global Services' values. Let’s team up to build an exemplary execution infrastructure that powers distributed work at your organization -from design to deployment!
$600 USD 21 päivässä
8,3
8,3

Hello I have thoroughly reviewed your project description and am confident in my ability to assist you in completing it successfully. I believe it would be highly beneficial to delve deeper into the specifics of the job to determine the most effective way forward. I am open to scheduling an interview at your convenience, and I genuinely appreciate the chance to collaborate with you on this project. Your response is eagerly anticipated, and I'm excited about the prospect of working together. Thank you for considering my proposal. Looking forward to your prompt reply! Best regards Rekha!!!
$750 USD 7 päivässä
7,9
7,9

Hello OneUs Global Services Team, I’m writing to apply for the Senior Full-Stack Software Engineer role. I have over five years of experience building and scaling production web applications, with strong hands-on work across frontend (React) and backend systems, APIs, and relational databases. I’ve worked on products moving from MVP to production, implemented authentication and role-based access control, and collaborated closely with product teams to translate requirements into reliable, scalable systems. I enjoy thinking in systems, improving architecture, and taking ownership of outcomes in fast-moving environments. I’ve attached my CV and included links to relevant projects/GitHub below. I’d be excited to contribute to building execution infrastructure for distributed work at OneUs. Thank you for your time and consideration. Best regards, Shivpal S
$500 USD 7 päivässä
7,4
7,4

Hi there at OneUs Global Services, As a seasoned Full-Stack Software Engineer with over 12 years of experience in developing scalable web applications and managing end-to-end digital solutions, I am excited about the opportunity to contribute to your platform's growth. I specialize in designing and implementing robust technical solutions, ensuring system reliability, performance, and security. I am well-equipped to assist in taking your platform from MVP to a production-grade system by building and hardening core product features across the frontend, backend, and data layers. My expertise in modern frontend frameworks like React and backend technologies such as Node.js align perfectly with the responsibilities outlined for this role. With a focus on clarity, simplicity, and maintainability, I aim to enhance the platform's operational efficiency and scalability. I am confident that my engineering maturity, sound judgment, and bias for system-level thinking make me a strong candidate for this critical role. Let's collaborate to elevate your platform to new heights. Can we discuss the next steps and timeline for this exciting project?How soon would you like to onboard the selected candidate for this project?
$570 USD 52 päivässä
7,1
7,1

I’m a Senior Full-Stack Engineer with 5+ years building production-grade web platforms using React and Node.js, backed by strong PostgreSQL data modeling and API design experience. I’ve shipped B2B operational systems from MVP to scalable deployments, with a focus on security, reliability, and clean architecture. I’m ready to contribute immediately and help take your execution platform to production. best regards ihtsham
$300 USD 1 päivässä
7,1
7,1

Hello, I'm Asma, Graphic Designer and Web Developer with 10 years of experience working with clients and agencies from around the world. Creative problem solver with a passion for creating visually appealing and user-friendly digital solutions. I love building luxurious brands and designing captivating visual identities. I've worked with clients in lifestyle, property, fashion, hospitality, and luxury sectors. 24/7 Support & Faster Response . #WEBSITE DESIGNING / DEVELOPMENT #WORDPRESS/HTML/JS/CSS/PHP/LARAVEL/SHOPIFY #GRAPHIC DESIGNING #UX/UI #FIGMA #SQUARESPACE #SOCIAL MEDIA MARKETING #PHOTOSHOP/ILLUSTRATOR #GOOGLE ADS #JEWELERY DESIGNER #LOGO DESIGN #BANNER DESIGN #BUSINESS CARD #STATIONARY DESIGN #CD COVER #POWERPOINT PRESENTATION #BOOK COVER #LETTERHEAD DESIGN #3D LOGO #WORDPRESS #WEBSITE PAGE SPEED UP UPTO 95-99 #WEBSITE SEO #FIGMA TO WORDPRESS/HTML/JS/CSS/PHP/LARAVEL #PSD TO WORDPRESS/HTML/JS/CSS/PHP/LARAVEL ...... ETC :)
$250 USD 3 päivässä
7,3
7,3

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.
$250 USD 7 päivässä
6,9
6,9

With Over 8 years immersed in a diverse range of web design projects like yours, I have honed my craft to perfection. Thus, I would be an ideal fit for your Senior Full-Stack Software Engineer position at OneUs Global Services. What makes me stand out is my ability to see beyond just the components of an application; I think in systems. This affords me the capacity to bring requisite architectural judgment and product thinking to any project, ensuring reliability, performance and security- just what you need for your platform. More significantly, as a seasoned web developer with a track record spanning the entire project life cycle from design to production, I will not only design and harden core product features but also collaborate effectively with your operations team to refine workflows and improve business logic. Moreover, my ability to reason about system design rather than just write features assures that I don't concentrate on them in isolation but in their contribution to the overall effectiveness of products like yours. Seeing Systems. Ensuring Success. That's my promise and one that goes beyond a single contract, so the long-term engagement you're open to is very appealing to me. Let's get started on transforming your concept into an efficient operational solution!
$250 USD 10 päivässä
7,0
7,0

Greetings, I’m immediately available to start. I’m a Master Expert in PHP Laravel, CSS/HTML, eCommerce, WooCommerce, WordPress, and Shopify, and a top-rated freelancer. ✅ I need to share a few samples from my portfolio with you. Are you available for a quick chat? Please check it out: https://www.freelancer.com/u/letdevs Cheers! Zubair
$500 USD 7 päivässä
6,9
6,9

hi there. i carefully read this project detais and fully understood your requirements. I am developer with 9+ years experience I completed many projects suceesfully and now I am working with roles of admin and developer in flypark of Auckland on remote. it is also booking system like this project. From my career, i think i could be best fitable dev with this project where is looking for a senior, product-minded full-stack engineer who can own the platform end to end: from frontend to backend architecture and data, with strong judgment around system notjust feature implementation. you can check my profile on this platform, but I am sorry not sharing Linkedinfo here before awarding cuz i need to keep the policy of this platform. looking forward to chat for discussing more in detail. Thanks.
$250 USD 7 päivässä
6,5
6,5

Greetings, I’m excited about the opportunity to help OneUs Global Services build a robust service booking platform. It seems you’re looking for a Senior Full-Stack Software Engineer to transform your MVP into a reliable, production-grade system. My approach would be to focus on designing scalable features that enhance user experience while ensuring strong backend support and data integrity. With over 5 years of experience in developing web applications, I’m well-versed in both frontend frameworks like React and backend technologies such as Node.js. I have a solid grasp of relational databases, which will be crucial for managing your application’s data flows effectively. I believe in writing clean, maintainable code and have a strong understanding of system design, which aligns well with your needs. I look forward to the possibility of contributing to your team and making a meaningful impact. Best regards, Saba Ehsan
$400 USD 3 päivässä
6,7
6,7

With over 12 years of experience as a full-stack software engineer, I believe that my skills and expertise align perfectly with the project you've outlined. I have developed numerous projects using the exact technologies and frameworks you've mentioned such as React.js, Python, Node.js, PostgreSQL, and more. My involvement in various large-scale web and mobile app projects has honed my ability to reason about system design and think in a comprehensive manner. Lastly, as someone who's handled multiple contract-based engagements successfully in the past, I understand the importance of timely delivery while ensuring high-quality standards. As a self-motivated individual with an insatiable thirst for newer challenges, I am eager to help take your platform from MVP to production-grade system. Consider me as someone who shares your vision of building an execution infrastructure for distributed work, and would be invested in both the short-term success and long-term growth of this project. Let's connect and discuss this opportunity further!
$250 USD 7 päivässä
7,2
7,2

Hello, I have extensive experience as a full-stack software engineer working with React, Node.js, and relational databases. I am skilled in building scalable web features, designing APIs, and implementing authentication and role-based access control, which aligns well with your need to elevate your platform from MVP to production-grade. I understand the importance of product thinking and system design in creating reliable and maintainable software. I am confident I can help improve your platform's workflows and prepare it for future scaling while maintaining simplicity and clarity. Thanks, Teo
$300 USD 5 päivässä
6,7
6,7

Hello, hope you’re doing well. I’m a Senior Full-Stack Developer with extensive experience in building production-grade web applications using React for frontend and Node.js / Express for backend, with PostgreSQL for relational data management. I’ve designed scalable APIs, role-based access systems, and internal dashboards for operational platforms, taking projects from MVP to full production. I’m comfortable reasoning about architecture, data flows, and performance, not just implementing features. I’d love to bring my experience in distributed workflow and operational platforms to help OneUs Global Services evolve its MVP into a reliable, scalable platform. Regards, Webzone Network
$400 USD 3 päivässä
6,0
6,0

Hello, Your vision of building an execution infrastructure for distributed work strongly resonates with how I approach product engineering. I specialize in taking MVP platforms and hardening them into reliable, production-grade systems by thinking in workflows, data integrity, permissions, and long-term scalability—not just features. I’ve led full-stack builds using React on the frontend, Node.js/Python backends, and PostgreSQL data models, with hands-on ownership of authentication, RBAC, API design, and deployment readiness. I’m comfortable collaborating closely with product and operations to translate real-world execution logic into clean, maintainable systems that scale across locations and roles. I bring engineering maturity, sound architectural judgment, and a bias for clarity—especially critical for operational platforms like yours. What are the most critical workflows that must be production-ready first? How are you currently handling verification and accountability in the MVP? Let’s connect
$500 USD 7 päivässä
6,2
6,2

Afikpo-South, Nigeria
Maksutapa vahvistettu
Liittynyt huhtik. 26, 2014
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