Python API engineer for AI platform @ DevBrother

3 weeks ago

Remote Gdańsk, Czech Republic DevBrother Full time
  • At least an Upper-Intermediate level of English.
  • 5+ years of experience in API development, with at least 2+ years specifically working with blockchain technologies.
  • Expertise in Python, with proven experience in extending APIs (FastAPI) for Cosmos-based projects.
  • Strong understanding of distributed systems, consensus algorithms, and decentralized network protocols.


Technical Skills:

  • Expert in Python with experience in FastAPI.
  • Deep knowledge of RESTful and gRPC APIs with a focus on performance and security in decentralized environments.
  • Experience with blockchain (Cosmos Tendermint) for cross-chain agent registration.
  • Strong experience with Docker, Kubernetes, and cloud environments.
  • Experience in optimizing databases for blockchain applications (bonus if familiar with graph database technologies like Neo4J)
  • Ability to work independently as well as collaborate within a distributed team environment.
  • Strong problem-solving skills with attention to detail and an analytical mindset.
  • Excellent communication skills and the ability to write clear technical documentation.


Will be a plus:

  • Familiarity with the broader Cosmos ecosystem, including tools like Starport or Cosmos modules like staking, governance, slashing, etc.
  • Experience with smart contract development (e.g., CosmWasm) and extending APIs to interact with smart contracts.
  • Open-source contributions to blockchain projects are highly desirable.

Our client is developing a decentralized AI platform powered by blockchain, enabling the swift creation, sharing, and monetization of AI services. The platform operates as a marketplace where developers can publish and sell various AI tools, while users can test, purchase, and use them.

The project’s mission is to create an open and independent artificial general intelligence, accessible to everyone, dedicated to benefiting humanity and remaining free from the control of individual companies or governments.

We seek an experienced API Engineer with deep experience in extending APIs and building high-performance solutions within the Cosmos ecosystem. The ideal candidate will have a solid understanding of blockchain architecture and distributed systems and a proven track record of developing secure, scalable, and robust APIs. This role will focus on extending API functionality to enable seamless integration with Cosmos SDK-based blockchains, leveraging Tendermint's consensus engine and related tools.

🎁 We offer:
- Daily support for your technical and personal growth;
- Professional and very friendly team, that is always ready to help and support;
- Flexible working hours;
- All official holidays;
- 15 days of paid vacation;
- The company provides all the necessary equipment;
- Fitness support upon request;
- English classes up to three times a week;
- The company pays 50% of the cost of refresher courses for any employee of the company;
- Workstation space;
- Mentoring and Educational Programs;
- Regular Activities on a Corporate level (Team Buildings, Sports Events, Table Games, Tech Events);
- Advanced Bonus System.

We thank all those who apply, however, there is a possibility from our side, of not responding to some candidates who do not match the requirements, due to a large number of applicants. Thank you for your understanding.


,[API Design & Development: Lead the design, development, and optimization of APIs that interface with Cosmos/Tendermint, ensuring high performance, security, and scalability.
, Tendermint Integration: Develop and extend APIs that interact with the Cosmos SDK and Tendermint Core for various blockchain applications, focusing on usability, performance, and scalability.
, Blockchain API Extensions: Create custom APIs to extend the functionality of Cosmos-based blockchains, including governance, staking, IBC (Inter-Blockchain Communication), and more., Security & Performance Optimization: Ensure the APIs are secure, using the best practices in API security (OAuth, JWT, etc.) while optimizing for high throughput and low latency in a decentralized environment.
, Collaboration with Cross-functional Teams: Work closely with blockchain engineers, DevOps, and product managers to deliver solutions that meet the needs of developers and users in the Cosmos ecosystem.
, Testing & Documentation: Ensure robust test coverage for all API code and maintain high-quality documentation for developers integrating with Cosmos/Tendermint APIs.
, Continuous Improvement: Stay updated with developments in the Cosmos/Tendermint ecosystem and actively contribute to improving and enhancing our API architecture.] Requirements: Python, API, Blockchain, FastAPI, Network protocols, REST API, gRPC, Docker, Kubernetes, Cosmos SDK, Cosmos Tendermint, Smart Contracts, CosmWasm Tools: . Additionally: Flat structure, International projects.

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