Freelance Cyber Security Jobs

opportunity

Secure digital onboarding portal with Salesforce integration

We are Citipost Mail (Citipost Ltd), a UK-based B2B mail and communications provider, seeking an experienced developer or small team to build a secure digital customer onboarding portal and workflow for new business accounts. Our current process is manual and paper-heavy (Application for Credit, Agency Application Form, Customer Service Agreement and T&Cs, Direct Debit mandates). Average onboarding from application to fully signed CSA is around 15 days; we want to significantly reduce this through automation, better UX, and tighter workflow control. A core requirement is proven Salesforce CRM integration experience, as the portal must integrate with our Salesforce instance with both push and pull data flows. Scope Customer journey Sales triggers onboarding and generates a secure, unique link for the prospect. Prospect completes an online journey (standard or agency account), with conditional fields and document sets based on account type and payment method. Prospect uploads supporting documents (e.g. company letterhead, DD mandate) and signs digitally. Save-and-resume, accessible UI, and validation for key fields (company registration number, postcode, VAT, bank details). Workflow and approvals Automatic routing to Credit Control for checks and setting credit terms. Generation of the correct CSA pack (full CSA + T&Cs or CSA form + online T&Cs link) plus DD mandate where applicable. Internal counter-signature flow for Commercial/Legal. Status tracking from “Onboarding” to “Active” once fully signed and approved. Automation, dashboards, reporting Configurable email reminders for incomplete forms and unsigned CSAs/DDs, with escalation when SLAs are breached. Internal dashboards for Sales, Credit Control, and Support showing pipeline, live status, bottlenecks, and overdue tasks. Basic analytics on onboarding duration, drop-off points, and signed/returned agreement rates. Data, integrations, compliance Capture all existing form data in a structured database: company details, trading/registered addresses, VAT, contacts, services required, anticipated spend/volume, agency flags, payment terms and methods. Role-based access control and full audit trail (submissions, approvals, comments, document versions). GDPR-compliant data handling, encryption in transit and at rest, aligned to UK data standards. Salesforce integration (essential) Push onboarding data, documents, statuses, approvals, and signed milestones into Salesforce. Pull relevant Salesforce data to pre-populate forms, validate records, and avoid duplicate entry. Advise on object mapping, API approach, authentication, sync logic, and error handling. Please only apply if you can show previous work integrating a custom portal or workflow system with Salesforce CRM (bi-directional if possible). Other integrations & admin Ability to integrate with finance systems (e.g. Sage) and e-signature platforms (e.g. DocuSign, Adobe Sign). Admin interface to manage form fields, workflows, approval rules, email templates, and SLAs without code changes. Scalable, flexible architecture to support higher volumes, new product lines, and potential internationalisation. Deliverables Technical discovery and proposed architecture/tech stack. Design and build of the onboarding portal (front-end and back-end). Salesforce CRM integration (push and pull). Implementation of agreed finance and e-signature integrations. Dashboards/reporting for core onboarding KPIs. Documentation, handover, and admin training. What we’re looking for Proven experience delivering secure B2B onboarding/workflow portals with multi-step forms, approvals, and e‑signatures. Demonstrable Salesforce integration experience with a custom portal or external application. Experience integrating with CRM/finance systems and e-signature tools. Strong understanding of data security, GDPR, and role-based access. UK-based or very familiar with UK data protection and compliance. Please include in your response Links/examples of similar portals or Salesforce-integrated workflow systems you’ve built. Details of your Salesforce integration experience (including any bi-directional integrations). Proposed tech stack and approach. Estimated timeline and ballpark budget for an MVP aligned to this scope.

opportunity

SafeContractor Application Support – Security Company

We are a London-based security company working across venues, events, and TV production. We are preparing to apply for SafeContractor and already have core documents in place, including: Risk assessments (RAMS) Incident reporting processes Training records and SIA licence checks Insurance We are looking for an experienced UK-based Health & Safety consultant to: Review and align our existing documents Identify and fill any gaps Support us through submission Help ensure a first-time pass Ideal experience: SafeContractor / CHAS / SSIP applications Events, security, or hospitality environments This is a short-term project with potential for ongoing support.

opportunity

Anchor bolts calculations

We am looking for a structural engineer to perform a calculation for anchor bolts to secure a steel stand to a concrete base. Result should be what size of anchor bolts use. And some calculations which proves this. We have already the design of the steel construction.

opportunity

Build AI-powered document generation system (OpenAI API)

Project Overview I have an existing LMS platform where users access courses and complete structured workbooks (2 worbooks). I want to build a secure AI system that: - accepts completed workbook inputs from users - validates the data - generates documents documents - maintains consistency across all documents This is NOT a simple chatbot. It is a structured workflow system. - Core Workflow - User logs into LMS - User completes embedded workbooks (must NOT be downloadable) - User submits inputs to AI system Backend performs: - completeness validation - financial consistency checks - narrative checks - System creates a locked master data sheet AI generates: Documents All documents must remain consistent (single source of truth) Key Requirements - Security & IP Protection - Prompts must NOT be visible to developer/frontend - Prompts stored server-side (private database or secure vault) - OpenAI API key must be hidden (backend only) - No prompt exposure in frontend code

opportunity

Installation of openvpn in a linux server.

Install OpenVPN on an active Ubuntu Server 22.04 LTS (Jammy Jellyfish) without disrupting existing production applications. Tasks: perform a safe, non-intrusive installation and configuration of OpenVPN, ensure compatibility with current services, create secure server and client certificates, configure routing and firewall rules, enable systemd service with automatic restart, and validate connectivity with minimal downtime. Provide rollback steps, comprehensive documentation of changes, and post-installation verification to guarantee stability and security.

opportunity

Design & Art → 3D Modelling & Rendering

Develop photorealistic 3D renders for TraceTag Guardian, a forensic tagging system for retail, petrol stations, and warehouses. Deliver three unit variants with a serious, authoritative aesthetic reminiscent of high-end security hardware. Designs should feature matte black steel housings, crisp white typography, precise detailing, and professional finishes suitable for investor presentations, retailer pitches, and marketing collateral. High-resolution renders with realistic lighting, materials, and multiple angles are required. Please include examples of previous security or industrial product renders with your proposal

Malware removal and add security in 5 wordpress webiste

Malware removal and add security in 5 WordPress websites

React Native & Node.js developer for release audit

I need an experienced React Native / Expo and Node.js developer to conduct a final release audit for my full-stack mobile app and backend. Check for release blockers, crash risks, broken flows, auth and payment flows, security/privacy issues, and app store readiness. Provide a short written report first; no code changes until approval. Must have experience with Stripe, Google OAuth, mobile release and security best practices. This is a fixed-price audit only.

New Website in Shopify

We seek an experienced Shopify developer to rebuild and modernize our existing site (augustinejewels.com) using the Prestige theme, refine and optimize custom code, and migrate all products, collections, pages, customer data, and SEO settings. Responsibilities include responsive theme customization, performance optimization, secure payment and shipping configuration, and thorough QA across devices and browsers. Deliverables: polished, fast, SEO-friendly Shopify store with complete migration, documentation, and post-launch support.

Website development

We are seeking an experienced and creative Freelance Website Developer to design, develop, and optimize a modern, high-performance website that aligns with our brand identity and business objectives. The ideal candidate will have a strong eye for design, solid technical skills, and the ability to deliver a secure, responsive, and scalable website within agreed timelines.

Ascenda Investment platform development

We're seeking an experienced full-stack developer to enhance our existing Ascenda Platform - a closed investment management system built with React/TypeScript and Node.js. The platform currently handles user accounts, investment tracking, and payment processing with mock authentication. Current Tech Stack Frontend: React 18, TypeScript, Vite, React Router, Axios Backend: Node.js, Express, TypeScript, PostgreSQL Authentication: Currently mock implementation (needs replacement) Step 2 Requirements 1. Authentication & Security Implementation Replace mock authentication with secure JWT-based system Implement bcrypt password hashing (already in dependencies) Add proper login/logout functionality with session management Create secure middleware for route protection Implement role-based access control (admin/user profiles) Add password reset functionality Implement rate limiting and security headers 2. Enhanced User Management System Build comprehensive user registration flow Create user profile management with validation Implement user search and filtering capabilities Add user status management (active/inactive/suspended) Create audit logging for user actions Add bulk user operations for admins 3. AI Chatbot Integration Design and implement AI chatbot interface Create context-aware responses for platform-specific queries Integrate with existing user data for personalized assistance Implement chat history and session management Add multilingual support (building on existing i18n structure) Create admin dashboard for chatbot analytics 4. Crypto Wallet Connection Integrate Web3 wallet connectivity (MetaMask) Implement USDC/USDT balance checking Create secure wallet address validation Add transaction history tracking Implement multi-wallet support per user Create wallet disconnection and switching functionality Technical Requirements Must-Have Skills 5+ years full-stack development experience Expert-level TypeScript and React knowledge Strong Node.js/Express backend development PostgreSQL database design and optimization JWT authentication and security best practices Web3 integration experience (ethers.js, web3.js) RESTful API design and implementation Preferred Experience Fintech or investment platform development AI/ML integration (OpenAI API, custom models) Crypto wallet integration experience Multi-language application development Performance optimization for financial applications Security auditing and compliance knowledge Deliverables Phase 1: Security Foundation (Week 1-2) Complete authentication system replacement Secure API endpoints with proper middleware User management enhancement Security testing and documentation Phase 2: AI Integration (Week 3-4) Chatbot UI/UX implementation AI service integration and configuration Context management and response optimization Testing and refinement Phase 3: Wallet Integration (Week 5-6) Web3 wallet connection implementation Transaction monitoring setup Multi-wallet management system Integration testing with existing payment flows Phase 4: Testing & Optimization (Week 7-8) Comprehensive testing across all new features Performance optimization Security audit and fixes Documentation and deployment preparation Project Constraints Must maintain existing functionality during development Database schema modifications should be minimal and backward-compatible UI/UX should follow existing dark theme design patterns All new features must support both admin and user role contexts Application Requirements Please provide: Portfolio showcasing similar fintech/crypto projects Detailed approach for each of the 4 main requirements Timeline breakdown with milestones Examples of Web3 and AI integrations you've implemented Security practices you follow for financial applications

opportunity

Looking for an experienced UK link builder

Looking for an experienced UK link builder / digital PR specialist to secure high-quality backlinks in the travel, wedding, and hen party niche. Requirements: Manual outreach only Real UK websites, blogs, and publications DR30+ minimum Contextual, in-content links No PBNs, spam, or bulk directory links Examples of target sites: Rock My Wedding Love My Dress Luxury Lifestyle Magazine Deliverables: Live link URLs Domain metrics Link type (dofollow/nofollow) To apply: Send 3–5 live link examples Cost per link Brief outline of your outreach process

Website build, design and maintenance

Seeking an experienced web developer to design, build, and maintain a professional, responsive website. Responsibilities include creating a modern, user-friendly layout, implementing SEO best practices, ensuring cross-browser compatibility, optimizing performance, integrating necessary plugins or APIs, and providing ongoing updates, security patches, and backups. Deliverables: complete site deployment, documentation, and periodic maintenance. Strong portfolio and proven experience required.

opportunity

Design & Art → 3D Modelling & Rendering

Photorealistic 3D renders of three TraceTag Guardian unit variants for investor presentations, retailer pitches and marketing collateral. Create authoritative, security-sector visuals with matte black steel housings, clean white typography and restrained detailing, echoing professional CCTV/access-control aesthetics. Provide high-resolution angles, close-ups of branding and connectors, neutral studio lighting and contextual in-situ mockups (retail shelf, service counter, warehouse). Deliver polished, production-ready images suitable for print and digital use.

Full-Stack Developer Needed for Custom Website Development

Seeking an experienced Full-Stack Developer to craft a bespoke website with modern, responsive design and robust backend functionality. Responsibilities include developing intuitive UI/UX, implementing secure APIs, database schema design, authentication, and deployment. Candidate should demonstrate proficiency in JavaScript frameworks, server-side technologies, and cloud hosting. Deliverables: clean, maintainable code, documentation, testing, and post-launch support. Timely communication and adherence to milestones required.

Integrate payqora.com payment gateway to my website

We are looking for an experienced PHP developer to integrate the PayQora payment gateway into our custom-built website. Our website is developed using a custom tech stack that includes HTML, PHP, and MySQL (no CMS like WordPress or Shopify). The integration must be done directly within our existing codebase while maintaining performance, security, and clean architecture. Scope of Work: • Integrate PayQora payment gateway into our existing website • Implement secure payment processing (including API integration, authentication, and transaction handling) • Handle payment success, failure, and pending states properly • Ensure proper database updates after transactions (order/payment status) • Implement necessary webhook or callback handling (if supported by PayQora) • Provide basic testing to ensure end-to-end payment flow works correctly • Fix any bugs related to integration Requirements: • Strong experience with PHP and MySQL • Prior experience integrating payment gateways (preferred: PayQora or similar APIs) • Understanding of API integration, JSON handling, and server-side validation • Knowledge of security best practices (e.g., preventing fraud, securing transactions)

opportunity

AI Viber coder needed to complete my current NextJs app

Seeking an experienced AI Viber developer to finalize an existing Next.js application. Responsibilities include integrating Viber messaging features, implementing bot logic, ensuring secure authentication, handling webhooks, optimizing performance, and delivering clean, well-documented code. Candidate must demonstrate prior Viber API experience, strong React/Next.js proficiency, and ability to troubleshoot deployment issues. Timely completion, attention to detail, and adherence to best practices are essential. Provide a clear plan and estimate for finalization.

opportunity

Healthcare Compliance and Accreditation Platform Development

We are seeking a skilled developer to create a robust platform focused on compliance and accreditation in the healthcare sector. The ideal candidate will have experience in building secure, user-friendly applications that adhere to regulatory standards. This project involves designing the architecture, developing features for document management, user authentication, and reporting. A solid understanding of healthcare regulations and quality assurance processes is essential. I am looking to build a platform for compliance and accreditation in healthcare. With modules such as • AI-Powered Policies and Procedures Creation • HR Management • Governance • Audit Management • Education and Training • Policy Management • Contract Management • Monitoring and KPI Management • Risk Management • Complaints Management • Integration and Security Please let me know if you can help me build this

opportunity

Automatic Check Out System for TCG etc

Looking for someone to set up, maintain and operate an ACO bot/service. I have used Stellar with limited success - as I am not “tech savvy” but moreover do not have the time need for maintenance and maximising I.e jigging accounts, managing proxies and quickly responding to new product drops to update tasks etc etc. As such, more recently I have used ACO services with great success. However, they aren’t scalable to the level I would like I.e max of 10 accounts, only targeting drops rather than monitoring restocks. Therefore, looking to partner with someone who has the time and the knowledge to operate an ACO service on a large scale on my behalf. I am relaxed whether this is custom built or using existing software - the focus for me the ongoing success and output. In terms of stores, I would be looking to target all UK retailers (that sell at RRP) and also those that operate an invitation model (Amazon, chaos) in order to utilise mass accounts to improve chances. In terms of fee structure, the typical PAS fee I have been paying 15% of profit on secured product and I would expect to pay a “set up” fee as a one off to cover the design, loading and set up.

Make content changes to existing website

Changes to be made to existing website www.aeoliki.co.uk (a) remove pages and any links to them, remove them from navigation & tiles, remove them from “Products & Services” tiles: LUBRICANTS (under Worldwide Services) TEST KITS (under Worldwide Services) LOADING SOFTWARE (under Worldwide Services) (b) "About" page: name the first tab "UK", name the second tab "Portuguese", name the third tab "Greek", name the forth tab "Welsh" (c) Bottom of all pages and "Contact Us" page: amend address from Holly House, Elm Gardens, Welwyn Garden City, AL8 6RY, UK to Bowlers End, Hitchin, SG5 2EA (d) Under CELLULAR COMMUNICATIONS" combine the texts of the pages "4G HARDWARE", "VESSEL BRIDGE PHONE" into one page with heading "HARDWARE". Then remove the pages "4G HARDWARE", "VESSEL BRIDGE PHONE" (e) Under HOME page, amend the text from "Steve Green, P&O Ferries" to "Security Officer P&O Ferries", and from "Dean, Capt of MY Jaguar" to "Capt of MY Jaguar" On all of above, Set up redirects to avoid broken links and protect SEO. Clear Cache if enabled. Thanks, Thanassis