Alert: We are aware of a fraudulent email approach to some clients to change our bank details. Please note our bank details remain unchanged. If you’ve received any suspicious communication, please contact us directly.

SubBanner banner image

Solidity Blockchain Engineer

Munich, Bayern, Germany

Apply by 22 Oct 2025

€50 - €70 per hour

Job Ref.: BH-55728

Job Description

Fornour customer we are seeking a Blockchain Engineer for a long term project - We need a Lead Engineer with Solidity skills for an initial 3 month contact with a view to extend 

 - Writing smart contracts in Solidity. 
- Ability to design modular, reusable contract architectures. 
- Track record of designing contracts following industry best practices (SWC Registry, OWASP guidelines for blockchain).  -
Ability to design interfaces/APIs that work with off-chain systems (REST, gRPC, SAP, etc.)  - Implementation of ERC standards (ERC-20, ERC-721, ERC-1155, ERC-4626).
  • Experience with gas optimisation, inheritance patterns, libraries, and modifiers.
  • Ability to write upgradeable contracts (e.g. using OpenZeppelin’s proxy patterns).
  • Familiar with common attack vectors (reentrancy, overflow/underflow, frontrunning, flash loan exploits).
  • TDD/BDD with frameworks (Hardhat, Foundry, Truffle). 
  •  Hands-on experience with auditing tools (Slither, MythX, Echidna). 
  • - Ability to design modular, reusable contract architectures. 
  • - Track record of designing contracts following industry best practices (SWC Registry, OWASP guidelines for blockchain). 
  •  Ability to design interfaces/APIs that work with off-chain systems (REST, gRPC, SAP, etc.) 
  •  Implementation of ERC standards (ERC-20, ERC-721, ERC-1155, ERC-4626). Skills that separate great candidates from OK ones: 
APPLY NOW

Recent Jobs.

Cloud Security Engineer
Helsingborg, Sweden

Job Title: Freelance Azure Cloud Security Engineer Location: Gothenburg or Helsingborg (Hybrid/Remote) Type: Freelance / Contract We’re looking for a skilled Azure Cloud Security Engineer to support a

Application Security Engineer
Helsingborg, Sweden

For our customer we are looking for a talented Application Security Engineer for a project based in Sweden this requries 3 days per week onsite 6 month initial contract Embed security best practices i

Service Now Project Manager/ Architect
Zürich, Switzerland

We are currently seeking a ServiceNow ITOM Specialist / Architect. This is a Hybride PM/ Architect Role   The ideal candidate will have a strong background in ServiceNow, including IT Service Manageme