Uasoftdev

We're looking for Fullstack Python LLM developer to assist us with fixed-price projects and who is also open for part-time opportunities.

Currently we have "hot task that requires estimation, details are below.
Our customer is planning to build a custom internal system and would like to divide the development into three main phases:

Phase 1: Financial System
Phase 2: Communication System
Phase 3: Team Planning & Project Management

Below you will find the detailed scope for Phase 1 (Financial System).

## Phase 1 – Financial System

### Invoicing Module

* Create invoices (with automatic numbering logic)
* PDF generation
* Send invoices via email
* Status tracking (open, paid, overdue)

### Dunning / Reminder System (Important)

* Automated payment reminders
* Multiple dunning levels (e.g. 1–3)
* Custom payment terms per customer

Important:
We need the ability to define customer-specific exceptions, such as:

* Excluding certain customers from automatic reminders
* Individual grace periods
* Manual approval before sending reminders
* Fully manual handling for selected customers
* Notes and history per customer/invoice

### Quotation Module

* Create quotations
* Send via email (optionally printable)
* Status tracking:

* open
* accepted
* declined
* Follow-up function (e.g. automatic “are you still interested?” reminders)

### Order & Recurring Functions

* Order confirmations
* Recurring invoices (for repeat services)

### Product / Service Database

* Manage services and products
* Pricing, units, descriptions
* Reusable across quotations and invoices

### Financial Overview / Controlling

* Track income and expenses
* Categorization (e.g. labor, materials, machines)
* Project-based tracking
* Dashboard overview

### DATEV Integration

* Export for tax advisor
* Structured accounting data (SKR04 preferred)

## Calculation Tool (Core Requirement)

The system must include a calculation tool for project estimation:

* Based on:

* labor (hourly rates)
* machines (we provide cost tables)
* materials (quantity-based, no pricing needed)
* Direct transfer into quotations

## AI-Based Features (Very Important)

### AI Pre-Calculation

* Suggest working hours, team size, machine usage
* Learn from past projects
* Identify risks (e.g. underpricing)

### AI Post-Calculation (Key Feature)

* Compare planned vs. actual results
* Detect deviations (time, cost, efficiency)
* Learn patterns and improve future calculations automatically

### AI-Based Optimization

* Analyze workflows (quotation → project → invoice)
* Identify inefficiencies
* Suggest improvements and automation opportunities

## Technical Requirement

This should be a web-based system with a clean and scalable architecture.

Very important:
The system must be designed in a way that it is fully expandable, since we are planning additional features in later phases, including:

* Communication system (Phase 2)
* Team planning & project management (Phase 3)
Potential future *project visualization tools**

## Additional Notes

This is not a simple tool — we are building a custom internal system (mini-ERP) that should grow with our business.

What we need from you to proceed with this opportunity:

* Your technical approach
* Suggested tech stack
* Timeline estimation
* Experience with similar systems

We're looking for Senior Java Developer who has experience with custodial wallets + chains ( BTC, ETH, SOL, TRX) to join our team
 

Project is building an internal wallet technology platform for custodial operations across Bitcoin, Ethereum, Solana, and TRON. The platform will unify policy and governance, wallet management, transaction construction and execution, and signing coordination under a single client-owned stack, replacing the current fragmented model of multiple vendor-specific policy engines, wallet registries, and governance frameworks.

     Responsibilities:

• Build secure transaction flows for construction, signing coordination, broadcasting, and confirmation monitoring across multiple blockchain networks, ensuring reliability and scalability.
• Implement policy/governance engines for approval workflows, role-based access control, transaction limits, whitelisting, and compliance rules within a unified internal platform.
• Integrate and optimize blockchain node infrastructure, third-party APIs, and monitoring systems to maintain high availability, performance, and operational resilience.

The company helps hotel chains like Hilton and Marriott transform front-desk staff into revenue generators through upselling training and analytics. Their IN-Gauge SaaS platform empowers frontline teams across 2,000+ properties in over 100 countries.

- Implement scaling of the case detection process (scanner)
- Split API into multiple API services
- Emulate pubsub/cloud run locally
- Implement scaling of the case detection process (scanner)
- Split API into multiple API services
- Emulate pubsub/cloud run locally
- Extract & process data using PySpark + S3 (Kafka/Kinesis — bonus)
- Write & optimize SQL on PostgreSQL/Redshift; use DynamoDB as data source/sink
- Run and debug ETL jobs on Glue or EMR; monitor via console/Spark UI

Must-have skills:
- Data engineering - 5 years, 
- AWS - 3 years (1 year latest project), 
- Spark/PySpark - 2 years (1 year latest project)
- English B2+