Web3 Back-end Developer

Technologies we use

About the project

Your responsibilities

• Design, develop, and maintain back-end services for Web3 applications.
• Work with TypeScript and Java to build high-performance applications.
• Ensure a strong understanding of asymmetric cryptography principles and their application in security mechanisms (ECDSA, Ed25519, RSA, etc.).
• Utilize relational (PostgreSQL) and NoSQL (MongoDB, Cassandra) databases effectively.
• Develop and integrate smart contracts with EVM-based blockchains.
• Write clean, well-documented, and maintainable code following best practices.
• Debug and optimize applications for performance and scalability.
• Stay up to date with the latest Web3 trends and security practices.

Our requirements

• Proficiency in English at a professional level, both written and spoken.
• 3+ years in at least one of the following languages: Java,/JavaScript, or Rust.
• At least one year of experience with Solidity or Rust (WASM) based smart contracts.
• Strong understanding of asymmetric cryptography and digital signature algorithms (ECDSA, Ed25519, RSA).
• Experience with any back-end framework, such as Spring Boot (Java), Nest.js (TypeScript), or Axum/Actix (Rust).
• Solid knowledge of EVM blockchains and smart contract development.
• Proficiency with Git and Linux.
• Hands-on experience with relational databases such as PostgreSQL.
• Familiarity with NoSQL databases like MongoDB or Cassandra.
• What's Important for Us?
• Analytical and problem-solving skills – ability to think critically and make informed decisions.
• Open mind, curiosity, and a strong desire to learn new technologies and business domains.
• Ability to clearly explain non-trivial systems and algorithms.
• Effective communication – ability to explain complex technical concepts clearly.
• Ability to follow and understand technical conversations.
• Humility to ask questions where necessary.

Optional

• Familiarity with gRPC for efficient communication between services.
• Familiarity with message queues such as RabbitMQ for managing asynchronous processing and communication between services.
• Experience with Rust.
• Knowledge of distributed systems and peer-to-peer networking.
• Familiarity with Web3 libraries and frameworks.
• Experience with Docker and Kubernetes.
• Understanding of L2 scaling solutions (e.g., Rollups, Sidechains).

This is how we organize our work

This is how we work on a project

• Clean Code
• code quality measures
• code review
• design patterns
• static code analysis
• BDD
• DDD
• event modeling
• pair programming
• TDD
• architect / technical leader support
• Continuous Deployment
• DevOps
• SysOps
• team-level deployment
• active monitoring
• documentation
• issue tracking tools
• technical debt management
• functional tests
• integration tests
• pen tests
• performance tests
• regression tests
• test automation
• testing environments
• unit tests
• manual tests

Development opportunities we offer

• conferences abroad
• conferences in Poland
• development budget
• external training
• intracompany training
• mentoring
• soft skills training
• space for experimenting
• substantive support from technological leaders
• support of IT events
• technical knowledge exchange within the company
• the company supports open source projects
• time for development of your ideas

What we offer

• Attractive remuneration conditions.
• B2B cooperation.
• Stability of employment – bonuses for long-term cooperation.
• Possibility of remote/hybrid work.
• Interesting and challenging tasks – many different projects.
• Opportunity to develop and improve your competencies.
• Permanent or flexible working hours.
• Benefit package tailored to your needs.
• Independence and real influence on projects.
• Necessary work tools.
• Integration trips, meetings, and barbecues together.
• Coffee, tea, and fresh fruit to make your day more pleasant.
• No dress code – with us, you can be yourself!
• Supportive, close-knit team, with whom work is a pleasure.
• If you are excited about working in a dynamic Web3 environment and meet the above criteria, we’d love to hear from you!

Benefits

• sharing the costs of professional training & courses
• remote work opportunities
• flexible working time
• fruits
• integration events
• computer available for private use
• no dress code
• video games at work
• coffee / tea
• drinks
• leisure zone
• employee referral program

Recruitment stages

• 1.
  Initial interview
• 2.
  Technical interview
• 3.
  Decision

Silk Software House Sp. z o.o.