Senior OutSystems Developer / Architect – Freelance Contract

@tangramua

Hello,   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, Technical Documentation, DevOps, WebRTC, CI/CD, REST API 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.     

@ZohaibRoy

⭐⭐⭐⭐⭐ Expert OutSystems Developer/Architect for Your Enterprise Application Needs ❇️ Hi My Friend, I hope you're doing well. I just reviewed your project requirements and see you're looking for a Senior OutSystems Developer. You don't need to look any further; Zohaib is here to help you! My team has already completed 50+ similar projects for OutSystems applications. I will build and enhance your application by using best practices and proven methods to ensure quality and efficiency within your budget. ➡️ Why Me? I can easily handle your project as I have 5 years of experience in OutSystems development. My expertise includes application design, API integration, and performance optimization. I also have a strong grip on SQL Server, JavaScript, and C#/.NET, ensuring a well-rounded approach to your project. ➡️ Let's have a quick chat to discuss your project in detail and let me show you examples of my previous work. I'm looking forward to discussing this with you! ➡️ Skills & Experience: ✅ OutSystems 11 ✅ Service Studio ✅ Integration Studio ✅ LifeTime ✅ SQL Server ✅ REST API Development ✅ C# / .NET ✅ JavaScript ✅ Authentication & RBAC ✅ Performance Optimization ✅ AWS Integration ✅ Mobile Development Waiting for your response! Best Regards, Zohaib

@ismailrehman0331

Hi, I’ve reviewed the requirements and this is the kind of role where strong hands-on OutSystems experience and independent technical decision-making really matter. I have 7+ years of experience working on enterprise applications, with strong experience in OutSystems, O11/ODC, Service Studio, Integration Studio, LifeTime, REST APIs, SQL Server, C#/.NET, JavaScript, authentication/RBAC, and production deployments. I’ve also worked with AWS services, third-party integrations, performance optimization, security, and real-time communication/video APIs. I’m comfortable reviewing existing architecture, taking ownership of technical decisions, identifying risks early, and working through development, testing and production without constant supervision. I can share relevant OutSystems projects, certifications, O11/ODC experience, AWS/WebRTC work, availability and daily rate in chat. Best regards, Ismail Rehman

@DrSyafiq

The brief is clear; I’d prove the critical path first, then expand from working evidence. You're building Senior OutSystems Developer / Architect – Freelance Contract, where the real delivery risk is usually in the workflow details, not just the feature list. My approach would be to first define the integration contracts and backend boundaries, then deliver the first milestone around the riskiest data flow instead of only UI screens. Quick question: Which external integrations are absolutely required for MVP, and which can be staged after launch? Also, what is already available for Senior OutSystems Developer / Architect – Freelance Contract: a working codebase, designs, data, or only the brief? Best, Dr. Syafiq

@seefattechnologi

SURE------------------I am here to help you-------------I have experience with OutSystems 11, Service Studio, Integration Studio, LifeTime, , REST APIs, SQL Server, C#/.NET, JavaScript, authentication/RBAC, performance optimisation, and enterprise application architecture. I can also work across Flutter/Dart, AWS services, CI/CD, monitoring, and real-time/WebRTC integrations where required. I can work independently as a technical lead, review existing architecture, identify risks early, build reusable components, and provide clear technical documentation throughout the project. O Please ping me to get started and provide you with great results. Thanks!!!

@onkarkulkarni8

Hello, I can help you with "Enterprise App Development with OutSystems" as per your given set of instructions. Please get in touch to discuss more in detail and start with the initial discusssion. I usually work in small milestones, keep the code organized, and provide regular updates so changes are easy to review. Let's discuss the current setup. I'll suggest the best implementation and an accurate timeline. ⭐ 5.0/5 from a recent client: "A more professional version: “Excellent work! The job was completed within the committed timeline. Great quality, professionalism, and timely delivery. Highly appreciated and recommended.”" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.

@juanpablomacf

The real challenge in your project isn’t building modules — it’s enforcing a clean OutSystems architecture that scales, integrates reliably, and avoids the technical debt that slows enterprise apps. Most teams struggle when data models, API flows and LifeTime configurations aren’t aligned with best practices. I’ve led OutSystems projects as a technical owner, designing entities, workflows, RBAC, REST integrations, SQL Server models and AWS‑connected services. I work with O11 and ODC, using Service Studio, Integration Studio, LifeTime and Service Center to deliver production‑grade apps. I’ve also built custom C# and JavaScript extensions when OutSystems needed deeper control, plus real‑time integrations using WebRTC‑style APIs. My approach would be to review your current architecture, refactor weak areas, define scalable modules, integrate external services, and enforce secure patterns (logging, monitoring, exception handling, audit trails). I work independently, challenge poor decisions, and deliver maintainable components. One risk: mixing legacy patterns with ODC can cause performance issues. A unified architecture avoids that. I can provide years of experience, certifications, examples, daily rate and availability once you confirm whether you’re using O11, ODC, or a hybrid.

@toriquldev123

Hello Dear, I’m Md Toriqul Islam, and I’m excited to partner with you & I can dive into your project immediately as an experienced OutSystems developer and solution architect. I have a few questions: 1. Is the existing application built on O11, ODC, or both? 2. What real-time/video API is planned? 3. Are AWS environments already configured? I understand you need senior OutSystems expertise for architecture, development, integrations, security, performance, deployment, and production support. My skills in OutSystems, Service Studio, Integration Studio, REST APIs, SQL Server, AWS, C#, JavaScript, and enterprise architecture fit your requirements. I’ll work independently, identify risks early, review architecture, and deliver maintainable solutions with clear documentation and deployment procedures. Best regards, Md Toriqul Islam.

@arslanshahid386

Hi, I understand you're seeking a Senior OutSystems Developer to enhance a production-grade enterprise application. As this project involves both development and architectural responsibilities, it requires a nuanced approach to balance feature enhancements with system stability. The primary challenge in this project will be managing the integration of external systems while ensuring the application remains scalable and maintains performance standards. My approach would involve conducting a detailed assessment of the current architecture to identify potential bottlenecks and prioritize tasks that enhance both functionality and stability. With extensive experience in OutSystems development and architecture, I've successfully led similar projects where I integrated complex modules and ensured seamless system performance. My expertise in JavaScript further complements my ability to handle intricate integrations effectively. Q1 – Could you provide more details on the external systems that need to be integrated? Q2 – Are there specific performance benchmarks that the current application must meet post-enhancement? Q3 – Is there an existing documentation of the current architecture available for review? Looking forward to hearing from you.

@ssquare489

Your requirement for a senior OutSystems architect is very specific, so I want to be precise about fit: my strongest experience is in full-stack architecture, Flutter/mobile development, REST APIs, real-time communication, AWS-style cloud integrations, authentication, and production delivery rather than substantial hands-on O11/ODC architecture. Where I can add strong value is the Flutter and integration layer: secure API connectivity, OAuth/JWT authentication, push notifications, WebRTC/video integrations, Android/iOS builds, deployment, and clean coordination with an OutSystems backend. A relevant example is FileChannels, which involved mobile development, Agora calling, PubNub messaging, WebRTC, Stripe, CRM integrations, shared backend workflows, and centralized file handling. I’m also comfortable working independently on architecture decisions, API contracts, deployment, debugging, and production support. However, I would not represent myself as an OutSystems-certified senior architect without the required hands-on background.

@SkillCrafts

Your requirement for a Senior OutSystems Developer/Architect to deliver a production-grade enterprise application immediately caught my eye. My recent work involved architecting and building a critical customer portal using OutSystems, achieving a 20% reduction in support tickets through streamlined workflows and robust integrations, a similar outcome to what your project aims for. I'm adept at translating complex business needs into scalable, maintainable OutSystems solutions. My approach will focus on leveraging OutSystems' full capabilities. I'll begin with a thorough review of your existing architecture and requirements, identifying opportunities for optimization and best-practice adherence. This will involve creating detailed process flows, data models, and UI wireframes using OutSystems Service Studio and Integration Studio. Integration with external services will be handled via REST APIs and SOAP, ensuring secure and efficient data exchange. I'll prioritize modular design and code reusability, implementing automated testing where appropriate to guarantee stability and facilitate future enhancements. To ensure alignment, could you elaborate on the primary business drivers for this enterprise application and any specific technical constraints or preferred integration patterns you're considering? I'm eager to discuss how my OutSystems expertise can directly contribute to your project's success.

@melopgabriel

Hi, Production instability and unclear boundaries between integrations and business logic are the highest risks I see for an OutSystems 11 enterprise app. Without strict separation (Service Studio for UI/logic, Integration Studio for native code, and a clear API gateway) deployments become fragile and recovery takes too long. I have delivered multiple enterprise-grade OutSystems projects where I reworked monolithic screens into modular modules, moved heavy transformations into SQL Server stored procedures, and implemented token-based authentication and authorization flows that reduced auth issues in production. I have led code reviews, created CI/CD pipelines, and produced the runbook and deployment steps that on-call teams actually use. I start by running a focused architecture review: identify single points of failure, expensive sync calls, and missing observability, then propose targeted fixes for the next sprint. Implementation begins with testable changes to integrations and automated deployment scripts. - What existing pain points or incidents should I review first? - Are there corporate standards for authentication, logging, or a preferred AWS account I must use? Let me know if a short call would help move things forward. @melopgabriel

@kumarashish99

With +5 years handling OutSystems projects exclusively, specializing in backend development and DevOps, I'm perfectly suited for your freelance gig. I've built scalable and highly secure cloud infrastructures with ease, even integrating AI/ML services like Textract and Rekognition into applications- an aspect that comes in handier than most businesses realize! I've achieved AWS Certified Solutions Architect – Associate and AWS Certified Practitioner credentials while pursuing hands-on experience with Serverless and other containerized frameworks like SAM or SST. My profound knowledge on CI/CD pipelines builds on my capacity to automate deployment workflows seamlessly even on high-traffic systems. Your project needs a diligent senior dev/architect who can combine the technical knowledge, precision, and accountability. Over the course of 5+ years partnering with OutSystems, SQL Server and JavaScript, I have gained proficiency in LifeTime, Microsoft SQL Server,integration of REST APIs in various contexts plus authentication & role-based access control (RBAC). My previous Clients praise my ability to foretell technical risks early, hence come up with failproof solutions which I want to bring to your project. At my rate being highly open for negotiation as well as my availability from the get-go; it seems like you should give me a shot at this contract!

@sedawy

Drawing from over a decade and a half in the IT industry, I am an exceptional choice for your Senior OutSystems Developer / Solution Architect position. I have spent considerable time delivering end-to-end migration and development solutions across the globe for clients in diverse industries, such as FinTech, Education and Healthcare. My knowledge encompasses strong practical understanding of essential elements like CI/CD and DevOps methodologies while also enabling me to seamlessly setup and configure systems on AWS/Azure/GCP. With experience working unsupervised as well as my potential to provide insightful technical leadership makes me primed to not only deliver exemplary results but also offer valuable support for future. I offer a comprehensive skillset that aligns directly with your project's needs. My extensive experience in building CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI), deploying Kubernetes, Docker, Terraform on AWS/Azure/GCP, securing networks with firewalls and maintaining the overarching cloud security complements your OutSystems-centric demand. Moreover, my proficiency with JavaScript ensures I can leverage powerful practical techniques like this language alongside OutSystems 11 or LifeTime platform.

@Aaleen110

You need an experienced OutSystems developer to build a production-grade enterprise application, and I will start by understanding the existing architecture. I will build new modules and integrate external services using OutSystems, focusing on responsive web and mobile compatibility. I will design entities and develop application logic directly in OutSystems. For any complex integrations, I will use REST APIs and JSON. The part of this brief that is underspecified is the exact nature of the external services you need to integrate. I will assume these are standard RESTful services until you tell me otherwise. This is a senior-level engagement, so I will make architectural decisions as needed to ensure the solution follows OutSystems best practices. 10 reviews on Freelancer at 5.0, everything delivered on time and on the agreed price so far. What is the primary business goal this application is meant to achieve? I need your confirmation on the scope to begin.

@sanjana22kr

Hello there , I’m a senior application developer/architect with strong experience in enterprise application architecture, API integrations, SQL databases, AWS, security, RBAC, and production deployments. I can work independently from architecture through development, QA, deployment and production support. Relevant capabilities: * OutSystems 11 / ODC application development and architecture * Service Studio, Integration Studio, LifeTime & Service Center * Enterprise data models, workflows, reusable components * REST APIs, third-party integrations & API-first architecture * SQL Server / relational database design and optimization * AWS services, RDS, Lambda, Fargate and cloud deployments * Authentication, RBAC, audit trails, logging and exception handling * Real-time communication/video integrations and WebRTC APIs * Performance, scalability, security and production troubleshooting * CI/CD, environment management, QA/UAT and technical documentation Engagement: I can take technical ownership, review existing architecture, identify risks, make implementation decisions, estimate work and lead delivery without continuous supervision. Availability: Flexible for project-based work with potential long-term support. Rate: Available to discuss based on project scope and expected involvement. I can share relevant enterprise application/API integration case studies, architecture details and technical examples privately. Thanks

@XRProConnect

Hi, Aashiq here from Cape Town, South Africa. This project instantly caught my eye, so I had to reach out. I see you’re looking for a Senior OutSystems Developer to enhance a production-grade enterprise application. I have extensive experience with OutSystems, particularly in developing complex modules and integrating external services. I’m confident in my ability to elevate your application and would love to share samples of my successful projects. Based on what you mentioned, here is how we would approach the project: - Review existing architecture for improvements. - Design and develop responsive web and mobile-compatible modules. - Implement robust authentication and integrate REST APIs. - Optimize performance and prepare for deployment. You can expect clear communication throughout and a seamless, user-focused solution optimized for performance using the latest technologies. Best Regards, Aashiq

@mobasherreza10

With over 56 successful projects under my belt, I am proud to offer my expertise in OutSystems Development and Solution Architecture. Known for my on-time delivery and independent work style, I am highly experienced in O11, ODC, Service Studio, Integration Studio, and LifeTime. My abilities reach far beyond developing applications but include improving existing architectures, assessing development risks, and writing clear robust code that is easy to maintain and reuse. Integration is a significant aspect of any modern software solution, which is why I bring with me extensive experience of integrating REST APIs and third-party platforms such as AWS and SQL Server. Not only can I build complex applications from scratch but I am also strong at fine-tuning them for better performance and scalability.

@ZahidBangash123

With over a decade of experience in software development and a significant focus on OutSystems, I'm confident that I can bring great value to your project. At Sazcore LLC we have built and enhanced numerous production-grade enterprise applications such as yours. As a senior OutSystems Developer and Architect, my responsibilities have ranged from developing complex modules, integrating external services, designing entities and database models to optimizing application performance and scalability. My expertise extends beyond OutSystems and includes JavaScript, REST API, CI/CD and much more. This gives me a comprehensive understanding of the end-to-end development process as well as the ability to seamlessly integrate your application with AWS services, like you mentioned in the preferred experience section. In addition to my skills and experience, my approach aligns perfectly with what you're seeking - working independently, technical decision-making and providing valuable support throughout testing and production deployment. Moreover, as someone with extensive experience handling sensitive data applications, your data security concerns will always be met with the utmost importance. I believe my solid track record of successful OutSystems projects couple with my proficiency in relevant technologies make me an ideal fit for your freelance contract. Looking forward to contributing significantly to your project!