What This Is NOT
To avoid misalignment, this role is not:
A front-end role
A data science or CV model training role
A generic CRUD SaaS backend
A quick MVP or demo build
This is infrastructure-grade backend engineering.

Deliverables & Expectations
You will be expected to deliver:
Clean, readable, production-ready backend code
Dockerised services deployable to our cloud
Clear README and setup instructions
Documented event schemas and workflows
API documentation
A working end-to-end demo showing:
Event ingestion
Correlation
Task creation
Workflow progression
No ongoing support is implied after handover unless separately agreed.

Engagement Model
Fixed-scope milestones
Clear acceptance criteria per milestone
Payment released only upon verified delivery
All work must be deployable to our cloud environment

How to Apply (Mandatory)
To be considered, you must include:
A brief explanation of how you would design:
Event ingestion
Correlation logic
Workflow orchestration
Examples of similar systems you’ve built (real-time, workflows, event-driven)
Your preferred backend stack and why
Generic applications will be ignored.

These are the 20 backend feature/task names, ordered logically from CV → CW → Orchestration Engine → Core:

(These are the elements that need building)
CV Detection Event Ingestion API
Canonical CV Event Schema Normalisation
CV Evidence Storage & Metadata Linking
CV Zone-to-Asset Mapping Service
Multi-Source Event Ingestion Gateway (CV / IoT / Operator)
Event Idempotency, Deduplication & Replay Protection
Temporal Event Correlation Engine
Spatial Event Correlation Engine
Cross-Source Event Fusion Logic
Severity Scoring & Risk Classification Engine
Rule-Based Trigger & Suppression Logic
Workflow State Machine & Orchestration Engine
Task Generation from Correlated Events
Role-, Skill- & Shift-Based Task Assignment Engine
SLA Timers, Escalation & Compensation Logic
Operator Action Ingestion & Human-Initiated Workflows
Workflow Audit Trail & Decision Lineage Service
Multi-Tenant Org / Site / Asset Context Engine
Connected Worker Core APIs (Tasks, Actions, Evidence)
System Health, Monitoring & Operational Telemetry

I developed an web app with lovable which works fine so far.
I tried to wrap it with buildnatively to get into the playstore and appstore.
The wrapping did work but the in app purchases I was not able to fully configure so it works without issue.

Therefore I'm looking for someone that can do the final changes to make the in app purchases work and set them up so both the playstore and appstore do handle them without issues and consistantly.

Build with lovable with react, the wrapper is buildnatively and the whole thing links to revenuecat which then manages the whole integration to the playstore and appstore.

Here the documentation from buildnatively:
https://docs.buildnatively.com/guides/integration/in-app-purchases#how-to-verify-subscription-with-js

When you apply for this job, please start your cover letter with pink elephant.

Please let me know what details you need to know to give an accurate cost estimate and how long you'd need to execute.

We are looking for a talented and experienced developer to help us create an innovative AI product utilizing public-domain photos. The project will involve designing and implementing features that leverage image recognition and processing. Ideal candidates will have a strong background in AI development and a passion for working with visual data. Please submit a brief introduction and samples of your past work to showcase your expertise in this area. This is a great opportunity for a motivated individual to contribute to an exciting project.

Hello

Looking for an expert in Next.js and Electron who will work on our site to maintain and make constant updates to the site. You should have strong experience with building chat applications too (AI applications)

We are offering $100 per week to the candidate - we expect the candidate to spend half of their time for $100 per week i.e. approx 25 hours per week.

Thanks

We are seeking a talented developer to create a Smart Product Recommendation web application using the MERN stack and AI algorithms. The ideal candidate will have experience in building responsive applications that leverage machine learning for personalized user recommendations. You will work closely with our team to design, develop, and implement features that enhance user experience and product discovery. If you are passionate about merging technology and user-centric design, we want to hear from you!

We’re building a real-time AI-powered trading signals dashboard and need a senior full-stack engineer to implement a focused feature: a live dashboard that consumes market data, displays AI-generated buy/sell signals, and updates basic PnL and risk metrics in real time. The task involves Next.js on the frontend, Django/DRF on the backend, WebSocket-based live updates, and deployment on AWS. This is a one-time, clearly scoped task (~$500) intended for someone with prior experience in real-time or fintech systems who can deliver clean, production-ready code without hand-holding.

I need a cross-platform news app built in React Native, using an existing vibe-coded prototype as a starting point. Speed of delivery is important, and I prefer working with teams.
Scope of work
- Build a cross-platform app in React Native.
- Incorporate existing vibe-coded prototype (PWA) as reference.
- Integrate RSS, APIs, and LLMs for content ingestion.
- Provide complete source code and publish the app.
References
- Access to prototype source code (PWA) provided.
Additional information
- In-app payment/subscription
I prefer working with teams for faster delivery.

We are looking for talented Front-End Developers to join our team in building an innovative Web3 platform. You will work on creating user-friendly interfaces and responsive designs that enhance the user experience. The ideal candidate should have a strong understanding of blockchain technology and be proficient in modern front-end frameworks. If you have a passion for web development and want to be part of a cutting-edge project, we want to hear from you!

We’re looking for a skilled video editor to produce one polished SaaS explainer video with a cohesive, on-brand look and feel. You’ll take our script, voiceover, screen recordings, and brand assets and turn them into a clear, engaging video that’s consistent in style from start to finish.

We need clean pacing and transitions, accurate captions, light motion graphics where helpful, simple icon or UI callouts, and solid audio cleanup and mixing. You should be comfortable making SaaS concepts easy to follow and maintaining continuity across scenes.

Please share a few relevant samples (SaaS explainers or similar), the tools you use, your availability, and your expected timeline for delivering the final video. All communication and delivery should stay within Upwork.

We need a reliable person for a short data entry task. The job includes entering data into Excel/Google Sheets and checking for accuracy. This is a simple, quick task with clear instructions. If done well, there may be more work in the future.

We’re hiring a skilled Website Developer with strong experience in React and the MERN stack to build fast, scalable, and user-friendly websites and web applications.

You’ll be responsible for developing modern frontends, integrating APIs, and ensuring smooth performance across devices. This role is ideal for someone who enjoys turning ideas into high-quality, production-ready websites.

What you’ll do:

i) Develop modern, responsive websites using React.js
ii) Build and integrate backend services using Node.js, Express, and MongoDB
iii) Convert UI/UX designs into clean, functional web pages
iv) Optimize websites for speed, performance, and SEO best practices
v) Collaborate with designers and stakeholders to deliver polished results

We are seeking a skilled Next.js / React.js expert to help us troubleshoot and resolve various bugs in our application, as well as implement performance enhancements. Your experience with AI tools will be a plus. Ideal candidates should have a strong background in modern web development practices and a keen eye for detail. If you are passionate about optimizing web applications and have a track record of delivering quality results, we would love to hear from you!

We are seeking an experienced UI/UX designer to create modern website design for our agency(AI & ML services). The project will involve designing 6-10 pages:

1. Landing page
2. Services page
3. About Us page
4. Carrer Page
5. Contact page
6. Blog page+blog posts

Theme - modern, dark based

My website is familycrestjpg.com.

I am looking to create 1,000 pages, one for each of the most common surnames occurring in the US census.

For example, my database has about 30 indivdual entries for the surname Allen. Each has its own page. However, I'd like to aggregate all 30 on to one page. See attached Word doc for a loose concept.

This really shouldn't be that hard: all the necessary information is available on the individual pages, it just needs to be extracted with a scraper and the info can be used to generate the webpage.

PLEASE NOTE: The site is managed through Sellfy.com, which has LIMITED functionality and is NOT Word Press. I mention this because the last person I hired a person already who took my money and did not deliver, and then blamed Sellfy...

Description:

I’m looking for an experienced full-stack developer to build the MVP of a web-based SaaS application from the ground up.

This is a paid, clearly scoped MVP build, I already have the complete, professional UI/UX designs and written product requirements. Your role is to implement, not invent, the product.

**Important:
Sensitive information such as: The product name, concept details, and proprietary workflows will be shared only after an NDA is signed.

Tech Stack (Preferred):

- Frontend: React or Next.js (PWA)
- Backend: Python (FastAPI preferred)
- Database: PostgreSQL
- APIs: AI content generation + text-to-speech (experience with API orchestration required)
- Payments: Stripe subscriptions
- Hosting: Vercel / Railway / Render (or equivalent)

MVP Scope (High Level):

- User authentication
-Core content creation flow with adaptive questions
- Backend orchestration of AI + audio generation APIs
- Audio playback interface
- User library/history
- 3-tier Stripe subscription system
- Basic admin view (lightweight)
- Responsive web experience (mobile + desktop)
- Production deployment

*Not included in this MVP: native mobile apps, offline downloads, advanced analytics,

Budget & Structure (Non-Negotiable):

- Total budget: $6,000 USD
- Timeline: ~6–10 weeks
- Payment method: Weekly milestone payouts via Upwork escrow
- Process requirements:
- Weekly live demos of working features
- Clear progress updates each week
- Code pushed regularly (GitHub or similar)

***If you are not comfortable with weekly demos and milestone-based delivery, this will not be a good fit.

Communication, Collaboration & Availability:

- Strong English fluency is required (spoken and written)
- Ability to clearly explain technical decisions
- Ability to meet during U.S. Eastern Time (EST) for weekly check-ins and demos
(exact times flexible, but overlap is required)
- Must be able to work collaboratively, take feedback well, and communicate openly throughout the project

Experience Requirements

- Clear, verifiable work experience is required
- Ability to share past project examples (live links, GitHub repos, or detailed case summaries)
- Experience building real production SaaS applications
- Comfortable owning features end-to-end while collaborating closely with a non-technical founder
- Experience with Stripe subscriptions
- Experience integrating third-party APIs in a clean, maintainable way

***Candidates without demonstrable past work or relevant examples will not be considered.

Nice to Have (Not Required):

- Prior experience with AI-driven applications
- Media or audio pipeline experience
- PWA experience
- Subscription-based product background

How to Apply

Please include:

- A brief overview of relevant SaaS projects you’ve built
- Links or examples of past work (GitHub, live apps, or case studies)
- Your timezone and weekly availability
- Confirmation that you are comfortable with:
- The stated budget range
- Payouts will be Weekly demos
- Weekly escrow-based payouts
- EST meeting availability
- Any execution-related questions you have (no confidential concept questions at this stage)

If you choose to apply, I truly want to thank you for taking the time. I wish I could respond back to every candidate, however it will be difficult depending on the applicant pool.

Please Note:
**I genuinely don't mind if you use AI to respond, but Generic or copy-paste proposals without confirming this role is a good fit for you will be ignored.