Principal Security Engineer - Blockchain Wallet Infrastructure

Location: Remote - Location: US or EU (remote-first, office optional). Must be in the US, not Canada or in the European Union. France or Paris or as close as possible, always preferred

Compensation: $220K - $300K

Join a stellar team of leaders and experts in blockchain technology, cryptography, and infrastructure to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Principal Security Engineer to lead security design and development across our entire platform. Reporting directly to the CISO, you will set the strategy to protect our high-stakes financial systems, fix vulnerabilities, and keep client wallets safe.

This is a strategic and highly technical role spanning the full security lifecycle. You will make security part of every layer of the stack, from architecture design to incident response. Beyond defense, you will champion secure development practices, mentor engineers, and represent the company's security posture to clients and the wider community.

Responsibilities:

Security DevOps Engineer - Crypto Social Infrastructure

Location: London, New York City (Office)

Compensation: $250K - $300K

We are a high-growth software development company of elite builders and proud contributors to the largest crypto social network globally, a platform that has generated over $600 million in revenue since March 2024. We are seeking a Security DevOps Engineer to join our team, focusing on building secure, scalable infrastructure for decentralized applications and redefining what’s possible in social finance.

You will play a critical, hands-on role in hardening our development and production environments. This role involves integrating security throughout our CI/CD pipeline, automating security scanning and monitoring, and working directly with development teams to ensure a strong overall security posture across our cloud and blockchain infrastructure.

What You'll Do:

• As an Senior Azure Integration Engineer you can expect to…
• Architect, develop, and implement end-to-end integration solutions using Azure services (Logic Apps, API Management, Service Bus)
• Translate complex business requirements into scalable, secure integration architectures
• Lead technical discussions, client workshops, and integration assessments
• Develop and maintain CI/CD pipelines using Azure DevOps or GitHub Actions
• Engage with clients to gather requirements and define integration needs
• Conduct workshops, discovery sessions, and technical assessments
• Act as a trusted advisor, guiding HSO clients on best practices in Azure integration
• Provide mentorship and code reviews for junior engineers and consultants
• Lead code reviews, solution design sessions, and internal knowledge sharing
• Work independently and as part of a cross-functional team to deliver high-quality solutions.
  
  
• You're great at…
• Collaborating with cross functional teams to deliver enterprise-grade integration solutions
• Solving complex problems with creative solutions   
• Learning new concepts quickly and thoroughly   
• Learning new concepts quickly and thoroughly Promoting the mission and Shared Values of our company

Requirements

Antipollution, a member of Vasileiadis Group of Companies (V Group), is a leading provider of environmental and waste management solutions across the Eastern Mediterranean, Egypt, and the Balkans. Operating in six main business pillars, including Port Reception Facilities, Emergency Response Services, Decontamination Services, Renewable Energy, Alternative Fuel Production from Waste, and Technology, we are committed to sustainability, innovation, and operational excellence.

As part of our digital-transformation agenda, we are looking for a hands-on Senior Cloud & Infra Engineer (Azure / IoT) to join the Technology & Innovation Department. You will design, build and operate Azure-centric cloud infrastructure and an Industrial/IoT ecosystem—covering cloud services, edge devices, wired/Wi-Fi/cellular networking and electronic integrations—while enabling secure, scalable and cost-efficient operations in line with industry best practices and compliance standards.

Role Overview:

You will act as the technical owner for our Azure and IoT environments, covering everything from device connectivity and data ingestion to cloud resources, networking, and storage. The role is 100 % hands‑on: you will plan, build, automate, troubleshoot, and improve systems yourself—while collaborating with peers in software, data, and operations.

Key Responsibilities:

About METRO

METRO is one of Greece’s top employers, with over 11,500 employees. We operate My market, one of the country’s largest retail networks with 240 outlets, and are the leading company in wholesale consumer goods with 51 METRO Cash & Carry stores nationwide. As we expand our IT team, we are seeking a talented Mid/Senior Cybersecurity Engineer to join our dynamic environment and help shape the future of our infrastructure.

Are you a highly skilled and motivated Cybersecurity Engineer with a passion for safeguarding digital assets and innovative infrastructure?

If you thrive in a fast-paced environment and are eager to work in threat detection and mitigation across on-premise and cloud environments, we want you in #teammetro!

Your Role & Responsibilities

As a Cybersecurity Engineer, you will be a key technical expert, responsible for the design, implementation and operation of security solutions for on-premise, cloud, and hybrid infrastructures.  Your focus will include:

·         Firewall/WAF Infrastructure:

o    Manage and maintain firewalls / WAF such as Checkpoint, Cisco, Imperva and ensure optimal configuration and operation in cooperation with external partners.

o    Conduct regular vulnerability assessments and penetration testing.

 ·         EDR/NDR Infrastructure:

Contract duration: Start with 6 months

Location: JHB

Pay rate: Negotiable

Security Architectures

The Head of Security Architecture for the organization is responsible for designing, implementing, and maintaining robust security architectures that protect sensitive data in compliance with regulations such as POPIA, GDPR. This role is critical in safeguarding the confidentiality, integrity, and availability of electronic health records (EHR), patient and employee information, medical devices, and cloud-based healthcare services. The role will focus on designing and developing security architecture that aligns business and corporate security strategy. The role will collaboratively direct Security Architects, IT, and Engineers to design and build security controls and solutions compliant with approved enterprise architecture frameworks and standards across business and digital.

What will you bring?

Risk-based decision-making - expert in ISO 27001 / NIST / CIS controls, able to quantify and articulate risk, then select proportionate, cost-effective controls.

Pen-testing & threat-modelling - scoping, overseeing, and translating results into enforceable patterns and backlog items.

Influential communication - proven ability to engage C-suite and delivery stakeholders alike, adapting style to gain agreement and drive secure-by-design culture.

Job title: Information Security Architect

Contract duration: Start with 6 months

First preference: EEE candidates

Location: JHB

The Head of Security Architecture for the organization is responsible for designing, implementing, and maintaining robust security architectures that protect sensitive data in compliance with regulations such as POPIA, GDPR. This role is critical in safeguarding the confidentiality, integrity, and availability of electronic health records (EHR), patient and employee information, medical devices, and cloud-based healthcare services. The role will focus on designing and developing security architecture that aligns business and corporate security strategy. The role will collaboratively direct Security Architects, IT, and Engineers to design and build security controls and solutions compliant with approved enterprise architecture frameworks and standards across business and digital.

Key Responsibilities:

Job Description

Contract Period - 6 months extended

Role:Cloud Engineer

Experience: 4+ Years

Must have skills:

∙Strong understanding of IT infrastructure and operations.

∙Proficiency in Cloud hosting techniques.

∙Programming skills (e.g., Python, Java).

∙Knowledge of cloud computing platforms (e.g., AWS, Azure, GCP).

∙Strong problem-solving and analytical skills.

∙LLM hosting and operations

∙Managing DevOps

Good to have Skills:

∙Ruby on Rails

∙Python

∙Kubernetes, Docker

∙Java

∙Nvidia H200 GPU handling

∙Azure DevOps

∙Azure Cosmos DB

∙Docker & Kubernetes containerization

Key responsibilities:

∙Assessing technology and preparing for cloud transformation

∙Optimizing the architecture before, during, or after cloud migrations

∙Developing systems for the cloud

∙Looking after cloud governance

∙Operating databases on the cloud

∙Implementing measures for cloud security

∙Managing and optimizing the use of cloud resources

USP of role: Exclusive experience of hyperscale cloud computing involving huge interaction with

partners, customer business, IT, and other stakeholders.

About Jobgether:

Jobgether is a Talent Matching Platform that partners with companies worldwide to efficiently connect top talent with the right opportunities through AI-driven job matching.

One of our companies is currently looking for an Enterprise Account Executive in Germany.

This is a strategic sales role responsible for driving enterprise business growth across the DACH region. As an Enterprise Account Executive, you’ll be leading the end-to-end sales process for cutting-edge cloud identity and security solutions. You'll work closely with prospects and existing clients to uncover needs, deliver tailored presentations and demonstrations, and build long-term relationships. Your goal is to meet and exceed sales targets while helping organizations enhance their cybersecurity posture with intelligent, cloud-first technologies.

Accountabilities:

·         Drive full-cycle sales processes, from lead generation to deal closure

·         Act as the primary interface for prospects and clients in the region

·         Collaborate with technical and product teams during demos, evaluations, and POCs

·         Respond to RFPs/RFIs and tailor proposals to client needs

·         Maintain accurate records and forecasts in Salesforce

·         Build and expand pipeline using outbound prospecting, inbound leads, events, and partners

About Jobgether:

Jobgether is a Talent Matching Platform that partners with companies worldwide to efficiently connect top talent with the right opportunities through AI-driven job matching.

One of our companies is currently looking for a Senior Security Engineer in the European Union.

We are looking for a highly skilled and experienced Senior Security Engineer to join a global, forward-thinking team. In this role, you will help shape and operate a comprehensive security program, covering both corporate systems and cloud infrastructure. You will collaborate with cross-functional stakeholders to assess threats, develop secure architectures, and implement robust security controls. This is a hands-on position that demands a strong technical background, a problem-solving mindset, and a proactive approach to identifying and mitigating security risks.

Accountabilities: