Backend Developer (Rust & Blockchain Experience)

About SaaS Rationalization LLC

SaaS Rationalization LLC is an early-stage software company building technology to help organizations better understand, manage, and optimize their software environments.

Our broader goal is to help businesses gain better visibility into the tools and services they use, reduce unnecessary software costs and complexity, identify overlapping or underused applications, and improve how software-related workflows are managed.

As we build our technical foundation, we are also exploring technologies such as automation, secure transaction workflows, verification systems, and blockchain integrations where they provide practical value to the product.

About the Role

We are looking for a Backend Developer with strong Rust experience and practical blockchain knowledge to join our growing technical team.

This is primarily a backend engineering role. You will help design and build reliable services, APIs, integrations, data-processing workflows, and core application infrastructure supporting our software platform.

Some areas of the platform may involve blockchain-related functionality, including transaction processing, smart-contract integrations, verification, wallet interactions, or distributed systems. However, this is not a purely Web3 or smart-contract-focused position.

We are looking for an engineer who is comfortable building production backend systems and can also contribute when blockchain technology is appropriate for a particular business or technical problem.

The ideal candidate has solid backend engineering experience, is comfortable working in Rust, understands modern application architecture, and has enough blockchain experience to work confidently with blockchain-based services and integrations.

Responsibilities

Design, develop, and maintain reliable backend services using Rust

Build scalable REST APIs and service integrations

Design backend components that support our SaaS management and optimization platform

Work with databases, application data, authentication, authorization, and secure data handling

Develop services for processing business events, workflows, and asynchronous tasks

Integrate third-party APIs and external software services

Build reliable integrations between internal systems and external platforms

Contribute to blockchain-related functionality where appropriate

Work with blockchain transactions, APIs, wallets, smart contracts, or verification workflows when required

Implement secure transaction and data-processing logic

Help design maintainable and scalable backend architecture

Investigate and resolve application, performance, integration, and infrastructure issues

Write unit, integration, and end-to-end tests

Participate in code reviews and technical discussions

Improve observability, reliability, security, and maintainability

Collaborate with other developers when defining technical solutions

Take ownership of backend features from design through implementation and production

Requirements

Strong professional experience with Rust

Solid experience building backend applications and services

Experience designing and maintaining REST APIs

Good understanding of databases and application data modeling

Experience with authentication, authorization, and secure backend development

Understanding of asynchronous programming, event-driven systems, or distributed architectures

Experience integrating external APIs and services

Good understanding of software architecture and system design

Familiarity with testing, debugging, Git, and modern development workflows

Ability to investigate and resolve complex backend or infrastructure issues

Ability to work independently and take ownership of technical tasks

Clear communication and effective collaboration in a remote environment

Blockchain Experience

Candidates should have practical familiarity with blockchain development, but deep specialization in every Web3 technology is not required.

Useful experience includes:

Blockchain transactions and transaction lifecycle

Wallet integrations

Blockchain APIs or JSON-RPC

Smart-contract integrations

Digital signatures, hashing, and key management

Transaction validation

Blockchain nodes or infrastructure

Ethereum-compatible systems or other blockchain networks

Secure transaction workflows

Distributed systems

We are interested in candidates who understand how blockchain systems work and can integrate them into backend applications when there is a genuine technical or business reason to do so.

Preferred Experience

Experience in any of the following is beneficial:

Python, TypeScript, or another backend language in addition to Rust

PostgreSQL or other relational databases

Redis, queues, or event-driven processing

Docker and containerized applications

Cloud infrastructure

Microservices or distributed systems

SaaS products or B2B software

Third-party SaaS integrations

Workflow automation

Security-sensitive applications

Financial or transaction-processing software

Smart contracts or Solidity

Ethereum or other blockchain ecosystems

Monitoring, logging, and observability

CI/CD and automated deployment workflows

What We Value

Strong backend engineering fundamentals

Clean and maintainable code

Practical problem-solving rather than unnecessary complexity

Security-conscious engineering

Ownership and reliability

Ability to understand the business problem before choosing the technology

Good technical judgment

Thoughtful architecture decisions

Clear communication

Ability to work effectively in an early-stage environment

Willingness to work across different parts of the backend when needed

We do not expect every problem to require blockchain. We value engineers who can determine when conventional backend architecture is the right solution and when blockchain or distributed technologies provide meaningful benefits.

Position Summary

Title: Backend Developer (Rust & Blockchain Experience)

Level: Mid-to-Senior

Primary Skills: Rust, Backend Development, REST APIs, Databases, System Design

Additional Experience: Blockchain integrations and distributed systems

Location: Remote, Europe, North America, and South America

Employment Type: Contract