Senior Backend/Full Stack Developer needed / (Video call required)

@outraytech2022

Hi, I’ve gone through the project description and the scope is very interesting. My primary background is in full-stack/backend development using the MERN stack, where I’ve built scalable APIs, complex data models, admin systems, authentication flows, reporting systems, and large business applications. While my production experience has mainly been with MongoDB, I have worked with relational database concepts, schema design, indexing, relationships, and backend architecture patterns that directly translate to PostgreSQL-based systems. I’m also comfortable learning and adapting quickly to new tools and workflows, including Prisma. I have strong experience with: • Node.js and TypeScript backend development • REST API architecture • Complex business logic and scalable backend systems • Data modeling and backend integrations • Authentication, permissions, and multi-role systems • Deployment and server management I’m confident in handling the backend engineering aspects of the platform and collaborating closely on the architecture and implementation requirements. I’m available for a video call and can walk through previous projects and my development approach live. Looking forward to discussing the project further. Regards, Waleed Akmal

@rahuliitm69

Hi there, I have spent the last decade building complex backend systems using Node.js, TypeScript, PostgreSQL, Prisma, and scalable API architectures where data consistency, schema design, RBAC, auditability, and long-term scalability were critical parts of the system. One of the most complex systems I worked on was a multi-tenant SaaS platform involving asset management, workflow engines, role isolation, audit tracking, analytics layers, and enterprise-level relational schemas with deeply connected modules, which I can walk through privately during the discussion. For Phase 1, my approach will be to first finalize the complete relational architecture and data contracts properly with clear versioning strategy, deduplication logic, and scoring traceability before moving into Prisma schema implementation, engine integration, calibration validation, and REST endpoint structuring step by step. I am available for video interviews, comfortable with live architecture discussions and portfolio walkthroughs, and can stay actively involved throughout the engagement and future phases as the platform evolves. I would request to connect once so we can discuss the scoring architecture, product identity flow, and Phase 1 expectations in detail before moving ahead. Thanks, Rahul A.

@toni5705

Hi, We read every requirement carefully — truth layer ownership, 20+ table Prisma schema, 7-layer scoring engine, product deduplication, regulatory infrastructure, and full API layer. This is a serious backend foundation for a platform built to scale globally, and we want to be part of it from Phase 1. A brief answer to your application questions: 1. Most complex schema: a multi-tenant ERP system with 35+ tables covering inventory, billing, multi-location stock, and role-based access — designed for scale from day one. 2. Prisma and PostgreSQL: daily tools across multiple production systems — migrations, indexes, constraints, and query optimization are routine. 3. Scoring engine integration: yes — we have ported rules-based engines into Node.js/TypeScript backends with full auditability and versioning logic. 4. Availability: we can begin immediately. Estimated Phase 1 completion: 3–4 weeks with daily communication. 5. Video call: confirmed — we are available for a camera-on interview before any work begins. One honest note: the scope of Phase 1 as described — 20+ tables, 7-layer scoring engine, deduplication at scale, full API, and auditability — represents significant senior engineering effort. We'd welcome a conversation about aligning the budget with the scope before we start, so Phase 1 is delivered at the quality level this platform deserves. Are you available this week? Anthony Muñoz

@corpmember29

SCALABLE BACKEND ARCHITECTURE EXPERTISE FOR COMPLEX DATA-DRIVEN PLATFORMS. With 12+ years in backend engineering, AI systems, and enterprise SaaS architecture, we have designed and delivered large-scale PostgreSQL + Node.js platforms with complex relational schemas, scoring systems, API layers, and multi-tenant enterprise structures. Relevant experience includes: • 40+ table healthcare and analytics platforms • Multi-tenant SaaS systems with RBAC and organization isolation • AI scoring/rules engines with versioning and auditability • High-scale REST APIs using Node.js, TypeScript, Prisma, PostgreSQL • Redis/BullMQ queue-based architectures We fully understand the ownership required for your “truth layer”: ✔ Canonical product identity & deduplication ✔ Ingredient intelligence schema ✔ Regulatory & regional compliance modeling ✔ Scoring engine integration with traceability ✔ Reformulation event tracking ✔ Enterprise organization isolation ✔ Feature flags & calibration benchmarking ✔ Versioned REST API contracts Our approach focuses on long-term scalability, normalized schema design, indexing strategy, audit-safe versioning, and clean API contracts for future phases including genomic and hospital integrations. We are available for video interviews, technical walkthroughs, GitHub review, and ongoing collaboration across future phases. Estimated Phase 1 timeline: 4–6 weeks with milestone-based delivery and continuous testing.

@Web1devloper

With a vast eight-year background in full-stack and back-end development, I'm confident that my abilities align precisely with the backend lead role that you presently have. My team and I at HarshCode not only possess comprehensive knowledge of your tech stack requirements, but also guarantee meticulous attention to detail and data consistency. I am particularly drawn to the 'truth layer' aspect as it offers an opportunity to showcase our skills in PostgreSQL, Prisma, and Type-Script, which are skills that we've honed over time and applied to large scale projects such as this one. Furthermore, our proficiency with Express and Fastify APIs will optimize your REST API layer assuring effective communication between systems. In addition, we are familiar with BullMQ Redis, a critical component of your queue integration strategy. Beyond your immediate needs for phase one completion, engaging me means choosing a lifelong partner for this project's journey across all its phases. My commitment extends beyond quality delivery - it extends to evolving and growing the platform along with you. Let's actualize your global Food Intelligence Platform while enhancing food security and better healthcare outcomes globally!

@Herculesz

Hi I reviewed your Phase 1 backend foundation brief and can help build the core truth layer for the Food Intelligence Platform. The main technical challenge is designing a PostgreSQL and Prisma data model that can support product identity, deduplication, regulatory rules, scoring auditability, regional logic, and enterprise isolation without becoming fragile later. I have strong experience with Node.js, TypeScript, PostgreSQL, Prisma, REST APIs, schema design, indexing, constraints, versioned APIs, and backend systems where data consistency is critical. I can implement the 20+ table Prisma schema, product identity mapping, ingredient knowledge base, organization boundaries, feature flags, reformulation tracking, and scoring engine storage layer. For the scoring engine, I can wire the TypeScript rules into clean service logic, store layer breakdowns, support engine/ruleset versioning, and keep every result reproducible. I can also coordinate around the data contract so the pipeline engineer has a stable backend structure to build against. Thanks, Hercules

@teodorgeorge

Hello, I’m interested in supporting your Food Intelligence Platform by building a solid truth layer with Node.js, TypeScript, PostgreSQL, and Prisma. I’ve worked on complex backend foundations before, focusing on clean data structures and scalable logic. I’ve designed multi‑table schemas and integrated rule-based engines in past projects, and can bring that clarity into your Phase 1 work. I’m comfortable walking through my experience on a video call so you can assess fit clearly. Thanks, Teo

@ykarora26

With a strong foundation in Node.js and TypeScript, backed by experience in building scalable backend systems, I am equipped to lead your Food Intelligence Platform's backend foundation work. Understanding the critical role of the truth layer in maintaining data integrity and consistency, I am excited about the opportunity to contribute to this ambitious project. Could you provide more insights into the specific scalability requirements across different regions to tailor the architecture accordingly? Regards, Yogesh Kumar

@Hammadhassan21

Hi, I can build your Phase 1 backend foundation as a clean, scalable truth layer that defines how product data, scoring, and regulatory logic stays consistent across the entire Food Intelligence Platform. I will design and implement a complete PostgreSQL schema using Prisma with 20+ structured tables covering product identity, ingredient knowledge base, regional regulations, organizations, condition intelligence, scoring audits, reformulation tracking, and enterprise data isolation so the system is built for global scale from day one. I will develop a TypeScript based backend using Node.js with versioned REST APIs that support product lookup, barcode search, scoring endpoints, and fully traceable 7 layer scoring engine integration with audit logs, engine versioning, and reproducible outputs for every request. Please check out my profile to review my past projects and portfolio. https://www.freelancer.com/u/Hammadhassan21 I am available to start immediately. Ping me on chat to discuss all the things in detail and move forward Thanks.

@ZohaibRoy

⭐⭐⭐⭐⭐ Build the Backend for Your Food Intelligence Platform ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project details and see you are looking for a Backend Lead Engineer. You don’t need to look further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for backend development. I will create a robust PostgreSQL database schema and integrate the scoring engine efficiently within your budget. ➡️ Why Me? I can easily handle your backend needs as I have 5 years of experience in Node.js and TypeScript, focusing on database design, API development, and system integration. My expertise covers REST API design, data management, and performance optimization. Additionally, I have a strong grip on PostgreSQL and Prisma, ensuring a solid foundation for your project. ➡️ Let's have a quick chat to discuss your project in detail. I can show you samples of my previous work and how I can deliver the best results for your platform. ➡️ Skills & Experience: ✅ Node.js Development ✅ TypeScript Programming ✅ PostgreSQL Database Design ✅ Prisma ORM Integration ✅ REST API Development ✅ Data Modeling ✅ System Integration ✅ API Testing ✅ Performance Optimization ✅ Version Control (Git) ✅ Agile Methodologies ✅ Problem Solving Waiting for your response! Best Regards, Zohaib

@emilesd617

Hi, I am a senior backend and full-stack developer with 8 years of rich experience with a background in Node.js, TypeScript, PostgreSQL, Prisma, REST API development, scalable database architecture, and multi-tenant backend systems. For this project, the most important part is designing a stable truth-layer architecture where product identity, scoring logic, regulatory data, and auditability remain fully consistent as the platform scales globally. I have experience building complex relational schemas with versioned business logic, API contracts, role isolation, and high-performance PostgreSQL systems using Prisma and TypeScript. I can help structure the backend foundation, scoring engine integration, deduplication flows, and traceable scoring architecture so later platform phases can scale safely on top of it. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.

@Ekarthaan

Hi Nutri S., Last week I shipped a very similar nutrition truth-layer; I’m confident I can handle this well. Most complex schema: 68-table Postgres with strict FKs, composite uniques, JSONB, RLS, partitions, audit log; product identity across UPC/USDA/OpenFoodFacts; DB-level org isolation. Prisma/Postgres: 5+ yrs hands-on; safe migrations, composite/partial indexes (via SQL), scripted RLS, typed clients, CI migration checks. Scoring engine: Ported a 7-layer TS rules engine with versioning, layer breakdowns, and a calibration suite. Availability: ready to start after video call. Verification: video/ID fine; I can walk through repos live. i would like to know the below. 1) Do you have V3.1 scoring spec + test vectors for all 5 modes, and are rules pure functions or data-driven (YAML/JSON)? 2) Should enterprise isolation be enforced with Postgres RLS on org_id, or app-level tenancy only? I think we should. - Enforce org boundaries with RLS and generated org_id to guarantee clean multi-tenancy. - Version every product and engine run (append-only events) so any score is 100% reproducible. Lets follow a plan like this. 1) I map the ERD, write Prisma schema, add key indexes/policies, and confirm the data contract with the pipeline eng. 2) I build product identity + dedup (deterministic signature + trigram fallback) and prove zero dupes on 1k+ items

@zainalitariq245

Hi, I have carefully reviewed your project and understand that you are looking for a Backend Lead Engineer to build the core truth layer of a large scale Food Intelligence Platform. This is clearly a long term architecture focused project where database integrity, scoring traceability, regulatory structure, and scalable backend design are critical from the very beginning. My approach is to first finalize the complete data contract and schema architecture, then implement the scoring and versioning infrastructure, followed by API development, validation workflows, and end to end integration testing to ensure the entire system works reliably together rather than as isolated modules. I am available for video interviews, technical discussions, and ongoing communication throughout the project. I can also provide long term maintenance, backend optimization, and future phase support as the platform continues to scale. If you find my offer satisfactory, we will be happy to discuss your project in detail. I'm waiting for any kind of response. Thanks.

@amgadmourad18

Hello, I’m a full stack developer with around 5 years of experience building complex systems using Laravel, Django, React, PostgreSQL, and scalable REST APIs. I’ve worked on ERP platforms, hospital systems, multi-vendor marketplaces, and medical platforms where database structure, workflow consistency, and integration reliability were critical parts of the system. The most complex schema I designed was for a large ERP and inventory management platform with multi-warehouse operations, purchasing workflows, batch tracking, permissions, financial operations, and project management modules. I also have experience integrating rule-based and scoring logic into backend systems, including machine learning and analytical workflows. For Phase 1, my approach would be: First validate and formalize the schema and data contracts Build the PostgreSQL + Prisma foundation correctly from the beginning Implement identity/deduplication logic carefully to avoid long-term data integrity issues Wire the scoring engine with traceable versioning and layer-level auditability Finalize stable REST endpoints and end-to-end integration testing I’m available for a video call before starting, comfortable with portfolio walkthroughs and verification requirements, and I understand the importance of responsiveness and consistent communication for a long-term project like this.

@mrresearcher99

You’re right — the previous script did not fully address all the mandatory “How to Apply” points. Here’s a corrected version that includes them properly: Hi, I have experience designing complex PostgreSQL schemas with 30+ interconnected tables for scalable SaaS and analytics platforms involving audit logs, RBAC, transactional consistency, and high-volume APIs. My work has included deeply related entities, indexing strategies, version-controlled records, and enterprise-level data isolation. I’ve worked extensively with Prisma + PostgreSQL in Node.js/TypeScript environments, including migrations, schema optimization, relation modeling, and performance-focused API design using Express/Fastify. I also have experience integrating scoring/rules engines where deterministic outputs, traceability, and versioning were critical. Your Phase 1 requirements—canonical product identity, scoring auditability, organization isolation, regulatory schemas, and API architecture—align well with my backend experience. Estimated timeline for Phase 1: 5–7 weeks depending on scoring-engine complexity and pipeline coordination. I am available for a video call, technical walkthrough, and identity verification before project start. Best regards.

@Lincolnwhiz

Having specialized in Backend Development with a strong focus on Node.js, I am the ideal fit for your FOOD INTELLIGENCE PLATFORM project. Having built numerous scalable web applications and platforms, I understand the intricacies of structuring, interpreting, and maintaining consistent data as systems scale – a critical aspect for the truth layer you seek. Additionally, I'm well-versed in navigating large databases, which will come in handy for the 20+ table schema needed to support this ambitious project. Choosing me for Phase 1 does not just guarantee correctness and efficiency but opens doors for continued collaboration on all remaining phases. Above delivering a high-quality task at an affordable fixed price offer of $750 USD, I bring along a long-term mindset aimed at ensuring your platform stays reliable and scalable even as it grows globally. Let's take this journey together toward creating a Food Intelligence Platform that meets global standards

@mayankinnovative

Hi, As per my understanding: You are building the foundational truth layer for a large-scale Food Intelligence Platform where data consistency, auditability, scalability, and regulatory structure are critical from day one. Phase 1 focuses on designing a production-grade PostgreSQL + Prisma architecture, integrating the scoring engine, enforcing organization isolation, handling product identity deduplication, and exposing reliable REST APIs that future phases will depend on. Implementation approach: I have strong experience building complex TypeScript backends with PostgreSQL, Prisma, REST APIs, and scalable schema design. My approach would begin with designing the core relational architecture, normalization strategy, indexing plan, and version-controlled migration flow. I would implement canonical product identity mapping, audit-safe scoring infrastructure, regulatory-aware ingredient models, and organization boundary enforcement with long-term extensibility in mind. The API layer would be structured with versioned endpoints, validation, testing, and clear contracts for pipeline integration. I also prioritize reproducibility, traceability, and performance testing to ensure the system remains stable as future phases expand globally. A few quick questions: 1. Is there already an existing scoring engine specification/document for V3.1? 2. Will the pipeline engineer provide finalized import contracts before schema implementation begins?

@ashinnd84

Hello there, we are a team of MERN Stack , AI, ML, Cloud computing, Senior Full Stack Web and Mobile App Developers. Please, send me a message to discuss the work. Thanks Ashish Kumar.

@AlexVydrin

Hello, I am free now and can start work immediately in your timezone. Your Food Intelligence Platform project sounds incredibly exciting and aligns perfectly with my skills and experience. I've got a solid background in building complex backend systems using Node.js, TypeScript, PostgreSQL, and Prisma. The opportunity to own the core truth layer is something I'm genuinely enthusiastic about. I've previously designed intricate database schemas with over 20 tables focusing on scalability and data integrity, which seems to be the heart of this project. My experience with integrating scoring engines and ensuring end-to-end system functionality will be invaluable here. I'm fully available for a video call to discuss my prior work and how I can contribute effectively to Phase 1. Looking forward to potentially working together on this innovative platform!