Senior Blockchain Engineer - Rust/Solana

United States Digital Space LLC; United States; Remote; USD 140,000 - 210,000; Full time

Job summary

United States Digital Space LLC is a fast-paced fintech startup seeking a Senior Software Engineer to own backend systems. You will design scalable microservices (Go or Node.js), build RESTful APIs, and contribute to an AI-assisted development flow.

The role emphasizes robust architecture, high performance, and collaboration with frontend and blockchain engineers, product teams, and operations to deliver reliable services.

Qualifications

• 4+ years of experience building high-concurrency systems and APIs.
• Proficient in Go and/or Node.js with microservices and event-driven architecture.
• Strong experience with AWS services (Lambda, Cognito, Redis, SQS) and databases (PostgreSQL, DynamoDB).
• Experience writing unit, load, and automated tests and debugging production issues.
• Familiar with Docker, Kubernetes, GitHub Actions, and Terraform.

Responsibilities

• Understand and own the business domain and challenges.
• Design domain-driven architecture balancing robustness and startup speed.
• Build resilient microservices and APIs, with fast delivery.
• Contribute to deployment pipelines and observability.
• Develop, test, deploy secure code with AI assistance.
• Monitor production back-end for stability and performance.
• Collaborate with front-end, blockchain engineers, and product teams.

Skills

Go

Node.js

Microservices

APIs

Testing/Debugging

Tools

Docker

Kubernetes

GitHub Actions

Terraform

AWS

Lambda

Redis

PostgreSQL

DynamoDB

Job description

Looking for the fast paced, innovation fueled start-up life? the company is one of the most promising fintechs, present in Bucharest, London and Marbella, with a clear mission to become Europe’s top investment platform. We’re focused on exposing tokenized assets (eg: real estate) to investors and capital markets. We currently have 1500 Investors in 24 countries and over €50 million in assets under management. Being a multi-cultural Engineering-driven organization, you will feel here best while tackling difficult DeFi challenges with heavy AI assistance for maximum efficiency. We’re looking for a result-driven Senior Software Engineer with expertise in building scalable back-ends (microservices with GO or Node.JS, RESTful APIs, unit testing etc) that will act as a partner, own the outcome of his work, and share in the success.

Responsibilities

• Understand and own the business domain and challenges we’re faced with
• Create optimal domain driven architecture that will balance robustness and maintainability with the simplicity a start-up needs when accelerating
• Build resilient microservices and APIs, fast.
• Create or contribute to our automated deployment pipeline and observability setup
• Develop, test and deploy secure and maintainable code, heavily assisted by AI
• Monitor production backend systems to ensure stability and performance
• Closely work with and inspire your peers (including front-end and blockchain engineers), product team and business team

Requirements

• 4+ years of building high-concurrency systems and APIs with GoLang (preferred) or NodeJS, using microservices and event-driven architecture.
• Hands-on experience with AWS services such as Lambda, Congnito, Redis, SQS etc
• Proficiency with relational and NoSQL databases (PostgreSQL, DynamoDB)
• Experience writing unit tests, load tests and other automated tests
• Great at debugging production issues by assumption/validation, data extraction and analysis
• Previous experience with Docker, K8s, GitHub Actions, Terraform
• Ownership, speed, curiosity, result-driven, entrepreneurial mindset

Nice to Have

• Experience integrating with or developing Solana programs (Helius, Anchor, SPL token, Token 2022, Metaplex Core)
• Previous extensive integration of AI in the development flow
• Experience with DeFi
• Worked in the past with AWS Amplify or AWS CDK
• Some front-end experience (eg: React, Redux)