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Sto sviluppando un sistema di firma digitale e mi serve un’API scritta in Python che consenta l’invio di file in modo sicuro. Cosa mi occorre • Un endpoint dedicato alla data submission che accetti upload di file PDF. • Gestione dell’autenticazione (token o OAuth2) per garantire che solo utenti autorizzati possano inviare i documenti. • Validazione lato server: controllo del tipo di file, dimensione massima e presenza di malware. • Salvataggio del PDF su storage locale o S3 (sono aperto a suggerimenti) con tracciamento dell’ID di caricamento. • Log strutturati e gestibili (preferibilmente con logging JSON) per audit della firma digitale. Requisiti tecnici – Linguaggio: Python 3.x – Framework consigliato: FastAPI (valuto Flask se hai buone ragioni). – Firma digitale: l’API dovrà richiamare un modulo o servizio esterno che apponga la firma elettronica avanzata o qualificata; se hai esperienza con librerie come PyHanko o servizi eIDAS, indicalo. – Documentazione Swagger/OpenAPI autogenerata. Consegna attesa 1. Codice sorgente pulito e commentato su repository Git. 2. Istruzioni per il deploy (Docker-compose o simile). 3. Breve README con esempi di chiamata CURL e risposta JSON. Se hai già implementato soluzioni simili o integrazioni con provider di firma digitale, fammelo sapere: sarà un plus.
Project ID: 40414091
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96 freelancers are bidding on average €462 EUR for this job

Hi, This is Elias from Miami. I have gone through your project description and understand you’re looking to develop an API in Python for a digital signature system. This API will facilitate the process of sending and handling digital signatures securely. With over 10 years of experience in web development and backend integration, I have successfully built APIs using both Flask and FastAPI, ensuring they are scalable and secure. To approach your project, I will start by outlining the API requirements and functions, focusing on security measures for digital signatures. I'll ensure that the API is well-documented and easy to integrate with your existing system. I have a few questions to get a better understanding: Q1 – What specific functionalities do you need the API to support regarding digital signatures? Q2 – Are there any existing systems or libraries you plan to integrate with this API? Q3 – Do you have a preferred method for user authentication and data security? I’d be happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
€500 EUR in 3 days
8.3
8.3

Interesting project, I will build the FastAPI endpoint for PDF upload con autenticazione OAuth2, validazione server-side — tipo file, dimensione, scansione malware — e salvataggio su S3 con tracking ID univoco per ogni caricamento. Includerò logging JSON strutturato per audit trail, documentazione OpenAPI autogenerata e deploy via Docker-compose. Per la firma digitale, integrerò PyHanko per apporre firme PAdES direttamente sui PDF — questo mantiene il flusso interno senza dipendenze esterne, ed è compatibile con lo standard eIDAS. Se invece preferisci un provider qualificato esterno, strutturerò il modulo di firma come interfaccia astratta così da poter sostituire il backend di firma senza toccare il resto dell'API. Looking forward to potentially working together. Thanks, Kamran
€280 EUR in 13 days
8.4
8.4

Hi, To develop a secure API for file submission, I'll create an endpoint that handles PDF uploads with proper authentication and validation. This will include: - A dedicated endpoint for PDF file uploads. - Authentication management using token or OAuth2. - Server-side validation for file type, size, and malware presence. - Storage of the PDF on local or S3 with upload ID tracking. - Structured logging for digital signature audits. - Auto-generated Swagger/OpenAPI documentation. I will use FastAPI for its performance and ease of use, ensuring clean and commented source code on Git repository, along with deployment instructions and example CURL calls in the README. Ready to start once you provide the necessary details. Thanks!
€400 EUR in 3 days
8.2
8.2

⭐⭐⭐⭐⭐ Create a Secure Digital Signature API in Python for File Uploads ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you are looking for a secure API to manage digital signatures. You have no need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for API development. I will build a dedicated endpoint for PDF uploads, implement strong authentication, and ensure robust validation. Additionally, I will provide structured logging for audits, all within your budget. ➡️ Why Me? I can easily create your digital signature API as I have 5 years of experience in Python development, specializing in API design, security, and file management. My expertise includes FastAPI, OAuth2, and server-side validation. I also have a strong grip on AWS S3 for storage and logging solutions. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Python 3.x ✅ FastAPI ✅ OAuth2 Authentication ✅ File Upload Handling ✅ Server-side Validation ✅ AWS S3 Integration ✅ Structured Logging ✅ JSON Logging ✅ API Documentation (Swagger/OpenAPI) ✅ Docker Deployment ✅ Security Best Practices ✅ Digital Signature Solutions Waiting for your response! Best Regards, Zohaib
€350 EUR in 2 days
8.1
8.1

With over 12 years of experience in software development and an impressive portfolio of successfully delivered projects, my team at Ambient Infotech is confident that we can meet and exceed your expectations for the API Python per Firma Digtale project. We have a deep understanding of Python 3.x and have worked extensively with FastAPI, which makes us a great fit for your requirements. Moreover, our proficiency with PDF manipulation and secure file uploads adds value to this project. While we haven't worked specifically with PyHanko or eIDAS service, however, our skills extend to grasping new technologies quickly and efficiently. We recently built proficient APIs making use of OCR (Optical Character Recognition) techniques and integrating with providers like Adobe Sign which may prove beneficial here. As a standard practice, we ensure that all our codes are clean, well commented, and logically structured while incorporating modern logging methodologies for extensive audit capabilities. Our usage of Docker-Compose aids effortless deployments that can be efficiently handled by your team. Let's join hands to create an API that guarantees secure file submissions, efficient digital signature procedures, and a well-documented process for better maintenance!
€450 EUR in 5 days
7.8
7.8

Hi I can build a secure Python FastAPI for PDF submission in your digital-signature system, with authenticated upload, server-side validation, secure storage, audit logging, and auto-generated Swagger/OpenAPI documentation. The main technical challenge is protecting the upload pipeline properly, because PDF files must be verified for type, size, malware risk, storage integrity, and traceability before being passed to any signing module. I would implement token or OAuth2 authentication, a dedicated PDF upload endpoint, MIME and extension validation, configurable file-size limits, antivirus scanning integration, structured JSON logs, and unique upload IDs for tracking. For storage, I can support either local encrypted storage or S3-compatible storage, with metadata saved for audit and later signature processing. The signing step can be designed as a clean external service/module call, so PyHanko or an eIDAS-compatible provider can be integrated without mixing critical signing logic into the upload layer. I will also provide clean source code, Docker-compose deployment, environment configuration, and README examples with CURL requests and JSON responses. Thanks, Hercules
€500 EUR in 7 days
6.9
6.9

Hi, Questo sembra legato a due elementi chiave: upload sicuro + validazione/server-side prima della firma. Hai chiesto endpoint Python (FastAPI ok), autenticazione token/OAuth2, controllo tipo/size/malware, salvataggio locale o S3 e log JSON — tutto fattibile in un piccolo servizio. Prima cosa che controllerò/implementerò: l’endpoint di submission con verifica del token, controllo MIME/size, scansione antivirale (clamd o servizio esterno) e generazione immediata di un upload_id tracciabile prima di passare al modulo di firma (PyHanko o integrazione provider eIDAS a scelta). Poi storage configurabile e OpenAPI auto-generata. Posso fornire codice su Git, Docker-compose e README con CURL. Vuoi storage locale o S3 come predefinito per il primo commit? --Smith
€500 EUR in 7 days
6.9
6.9

I can build your secure Python API for digital document submission using FastAPI, designed specifically for scalable and audit-ready signature workflows. The system will expose a secure /upload endpoint for PDF submission with JWT/OAuth2 authentication to ensure only authorized users can access the service. Server-side validation will enforce strict file type checks (PDF only), size limits, and integrity verification before processing. I will also integrate a malware scanning layer (e.g., ClamAV or cloud-based scanning option) to ensure document safety before storage. For storage, I recommend AWS S3 (or local storage for development), with each upload generating a unique document ID and metadata record for full traceability. All actions will be logged using structured JSON logging to support compliance and audit trails required in digital signature workflows. For the digital signature layer, the API will be designed to integrate cleanly with external signature services or libraries such as PyHanko or eIDAS-compliant providers. This will allow you to plug in advanced or qualified electronic signatures without changing core architecture. The project will include full Swagger/OpenAPI documentation, Dockerized deployment, and a clean Git repository with a detailed README and CURL examples. Thanks, Asif.
€750 EUR in 5 days
6.9
6.9

Hello, I have 4 years of experience in Python and API development, with expertise in Flask and FastAPI. I understand your requirement for an API written in Python for secure file submission in your digital signature system. I have carefully reviewed the project details and can provide a professional solution. I am proficient in handling file uploads, authentication, server-side validation, file storage, and structured logging for audit trails. I am well-versed in Python 3.x and have experience with FastAPI for efficient API development. I kindly request you to connect in chat for further discussion. I am open to addressing any queries and collaborating on this project. Best regards, Taimoor from Pixels Soft
€500 EUR in 7 days
6.6
6.6

With over 12 years of experience as a Full Stack Developer and specialized in Python and PHP, I am well-equipped to handle your project for developing a secure digital signature system. Drawing from my extensive expertise, I guarantee a clean, functional, and high-performing solution that will meet your specific needs. Not only am I skilled in Python 3.x, but I am also adept at working with frameworks like FastAPI and Flask. This project requires robust authentication mechanisms and data validation to ensure only authorized users can interact with the system; these are areas where I excel. Additionally, my knowledge of libraries like PyHanko and services eIDAS will be crucial in implementing advanced or qualified electronic signature features. In short, hiring me means you're entrusting your project with a skilled professional who delivers quality work within agreed timelines! My commitment to clean scalable codes and unbeatable wealth of technical skills make me best positioned to deliver you the highest standard APIs needed for your digital signature system. Let's get started without delay!
€250 EUR in 7 days
6.9
6.9

Hi - Le API per firma digitale non si complicano sull’upload del PDF, si complicano quando autenticazione, storage, firma, ID documento e audit log non raccontano lo stesso percorso. Il flusso reale dovrebbe essere: utente autenticato invia il PDF - FastAPI valida tipo, dimensione e sicurezza - il file viene salvato su S3 o storage locale - viene generato un upload ID - il modulo PyHanko o provider eIDAS firma il documento - la risposta JSON restituisce stato, ID e riferimenti tracciabili. Questo sembra un endpoint di upload, ma diventa incoerente quando la firma viene separata dal tracciamento. Validazioni incomplete possono portare a risultati inattesi in uso reale, so I handle it by centralizing auth, validation, storage metadata and structured JSON logs. The part to get right early is the audit trail, perché impatta sicurezza, usabilità e correttezza.
€500 EUR in 7 days
6.4
6.4

Ciao, posso sviluppare un’API sicura e scalabile per l’upload e la gestione di PDF con integrazione firma digitale. Userò Python con FastAPI per creare endpoint performanti con documentazione OpenAPI automatica. Implementerò autenticazione (JWT/OAuth2), validazione file (tipo, dimensione, antivirus) e storage su S3 o locale con tracciamento ID. L’API includerà logging strutturato in JSON per audit e sarà pronta per integrarsi con moduli di firma digitale (es. PyHanko o servizi eIDAS). Architettura modulare, sicura e facilmente estendibile. Deliverables: Codice pulito su Git Setup Docker-compose README con esempi CURL e JSON Ho esperienza con API sicure, file handling e integrazioni esterne. Disponibile a partire subito.
€750 EUR in 7 days
6.5
6.5

Hello! I carefully reviewed your project about developing a digital signature system and I’m excited to help you create a robust API in Python. With over 10 years of experience in software development, particularly in Python and API design, I’m confident in delivering a solution that meets your needs. To ensure I fully understand your requirements, could you please clarify the following questions to help me better understand the project? 1. What specific functionalities do you want the API to support for the digital signature process? 2. Are there any specific compliance standards or security measures you want to integrate into this API? I’ve previously developed similar applications, including a document signing service that streamlines user authentication and a PDF generation tool that allows users to sign documents electronically. Both projects have been well-received by clients, and I can share more details if you’d like! I’m eager to collaborate with you to achieve your project goals. Let’s connect and discuss how we can make this happen! Best regards!
€500 EUR in 5 days
6.5
6.5

Hi There!!! ★★★★ (Secure Python API for digital signature file upload + audit-ready logging) ★★★★ Project understanding: I understand you need a secure Python API (prefer FastAPI) for uploading PDFs, with authentication, validation, secure storage, and integration with a digital signature service. ⚜ FastAPI REST API with upload endpoint for PDFs ⚜ JWT/OAuth2 authentication layer ⚜ server-side validation (file type, size, malware check) ⚜ S3/local storage with upload tracking ID ⚜ JSON structured logging for audit trail ⚜ Swagger/OpenAPI auto documentation ⚜ integration ready for eIDAS / PyHanko / external signer I will design clean microservice architecture in Python 3, using FastAPI + Pydantic, secure middleware, Docker deployment and modular design for easy extension. I have worked on API systems with secure file handling and backend integrations before, focus on security, traceability and scalable structure. Let’s discuss your signing provider so I can align integration properly. Warm Regards, Farhin B.
€256 EUR in 10 days
6.5
6.5

Hi, I can build a secure and production-ready Python API for your digital signature system using FastAPI, designed specifically for safe PDF submission and audit-grade traceability. The API will include a dedicated endpoint for PDF upload with strict server-side validation, including file type checks, size limits, and optional malware scanning integration. I will structure the authentication layer using token-based auth (or OAuth2 if preferred) to ensure only authorized users can submit documents. Uploaded PDFs will be stored either locally or in S3 (I can recommend the most scalable option based on your deployment needs), with each file assigned a unique tracking ID for full lifecycle traceability. All actions will be recorded using structured JSON logging to support compliance and audit requirements. For the digital signature step, I will integrate a modular service layer that can connect to external signature providers or libraries such as PyHanko or eIDAS-compatible services, keeping the system flexible for advanced signature workflows. Deliverables: • Fully working FastAPI project with clean architecture • PDF upload + validation + secure storage flow • Auth system (token/OAuth2) • Structured JSON logging for audit trails • Docker-compose deployment setup • README with CURL examples and API documentation Best regards, Doan
€250 EUR in 3 days
5.8
5.8

Hello, I will develop an API in Python for your digital signature system that will allow secure file submission. I have already implemented similar solutions with digital signature providers. I would love to discuss the project in more detail via chat. I am looking forward to working with you, Fahad.
€500 EUR in 5 days
5.5
5.5

Ciao, Il tuo progetto è molto chiaro e ben strutturato, soprattutto per quanto riguarda sicurezza, tracciabilità e integrazione con firma digitale. Ho esperienza nella progettazione di API sicure in Python e posso aiutarti a costruire una soluzione solida, scalabile e pronta per evoluzioni future (es. integrazione eIDAS). ? Approccio proposto Svilupperò un’API basata su FastAPI con: - Endpoint sicuro per upload PDF - Autenticazione tramite OAuth2/JWT - Validazione completa lato server (tipo file, dimensione, controlli sicurezza) - Storage su S3 (o alternativa compatibile) con tracciamento ID univoco - Logging strutturato in JSON per audit e compliance - Documentazione Swagger/OpenAPI automatica Per la firma digitale, posso implementare: - Integrazione con PyHanko (firma interna, rapida e controllata) - Oppure predisporre l’architettura per provider eIDAS esterni (scalabile) ? Consegna - Codice pulito e documentato su repository Git - Ambiente Docker pronto all’uso - README con esempi CURL e risposte JSON ❓ Alcuni punti da chiarire - Ogni upload è indipendente o serve gestione versioni? - La firma deve essere immediata o asincrona? - Preferisci firma interna o provider eIDAS? Posso anche aggiungere valore con: - Scansione malware (es. ClamAV) - Struttura pronta per scaling e code asincrone - Best practices di sicurezza (rate limiting, sanitizzazione input) Resto disponibile per discuterne e definire la soluzione più adatta.
€500 EUR in 7 days
5.6
5.6

Hello, I am Vishal Maharaj, a seasoned professional with 20 years of expertise in PHP, Python, Django, Software Architecture, API, FastAPI, and Flask. I have carefully reviewed your project requirements for developing a Python API for digital signature system. I propose to create a secure data submission endpoint for uploading PDF files with authentication using tokens or OAuth2. The server-side validation will ensure file type, size, and malware checks. The PDF files will be saved on local storage or S3 with tracking of upload IDs. Structured logging for audit trails will be implemented. I will utilize Python 3.x with FastAPI framework, integrating digital signature services like PyHanko or eIDAS. The API will be documented using Swagger/OpenAPI. Please initiate a chat to discuss this project further. Cheers, Vishal Maharaj
€500 EUR in 5 days
5.1
5.1

Ottimo progetto! Realizzerò la tua API Python per la firma digitale su FastAPI: endpoint per il caricamento di PDF con autenticazione OAuth2 o tramite token, validazione lato server (tipo, dimensione, scansione antimalware con ClamAV), firma PAdES tramite PyHanko o un servizio esterno qualificato eIDAS, storage S3 o locale con ID di caricamento, log di audit strutturati in formato JSON, documentazione Swagger generata automaticamente e distribuzione con Docker Compose, README ed esempi CURL. Utilizzerò FastAPI con PyHanko per la firma PAdES. La scansione antimalware viene eseguita tramite ClamAV in un container sidecar con dispatch asincrono, in modo che l'endpoint di caricamento rimanga sempre reattivo. Il logging strutturato tramite structlog con output JSON e un UUID per ogni richiesta in ogni riga di log fornisce tracce di audit tracciabili, come richiesto dalla conformità eIDAS. S3 su storage locale per garantire la scalabilità dell'API senza problemi di sticky storage. Domande: 1) Livello di firma: elettronica avanzata (PAdES tramite PyHanko) o qualificata (necessario un provider eIDAS italiano come Aruba, InfoCert o Namirial)? 2) Archiviazione: AWS S3, MinIO self-hosted o S3 in Italia per la residenza dei dati? 3) Modello di autenticazione: OAuth2 con il vostro IdP esistente o JWT auto-emessi per l'API? Resto in attesa di una vostra risposta. Cordiali saluti, Faizan
€420 EUR in 7 days
5.3
5.3

Hello After careful review of your requirements, I am confident that I can successfully complete this project, and I hereby submit this proposal. I understand that your objective is to develop a Python API for digital signature functionality, enabling secure document signing, verification, and management within your applications. I have strong experience developing Python APIs, integrating digital signature protocols, and ensuring cryptographic security and compliance with industry standards. This demonstrates that my skills are a good fit for your project. To realize this project, I would begin by designing the API architecture to handle document uploads, signature requests, and verification processes. I would implement secure cryptographic methods, user authentication, and logging for audit purposes. Additionally, I would provide endpoints for document status tracking, error handling, and integration with external services, ensuring reliability, scalability, and compliance with digital signature regulations. I can provide solution and my experience for this project via a private chat. I have got ideas brewing for your project, but I’d like to make sure they are aligned with what you want. Warm regards Ruslan
€500 EUR in 7 days
5.3
5.3

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