Senior Firmware Engineer (Blockchain Hardware)

Location: Based UTC -9 and +1

Compensation: $120K - $165K

We are looking for a Senior Firmware Engineer to develop, design, and optimize firmware for our cutting-edge cryptocurrency hardware wallets. In this role, you will be at the intersection of high-stakes security and embedded systems, collaborating closely with hardware and software teams to deliver secure, reliable, and highly efficient firmware solutions.

You will be responsible for the "brain" of our devices, ensuring that our users' digital assets are protected by battle-tested code. From architecting multi-threaded applications to ensuring seamless hardware-software compatibility, you will play a vital role in maintaining and improving both current and next-generation security devices.

Key Responsibilities:

Mercier Consultancy MD is excited to offer a unique opportunity for Portuguese Speaking Customer Service Representatives for a Cryptocurrency Exchange based in Greece. This role is ideal for individuals who have a passion for the cryptocurrency market and are dedicated to delivering exceptional customer support. As a member of our customer service team, you will assist clients in navigating their inquiries related to cryptocurrency transactions and services, all while communicating effectively in Portuguese.

Key Responsibilities

• Manage customer inquiries regarding cryptocurrency exchanges, wallets, and trading support via phone, email, and chat in Portuguese.
• Provide guidance on account setup, transaction processes, and security measures.
• Assist customers with troubleshooting and resolving issues related to their accounts or transactions.
• Educate clients about cryptocurrency products and market trends to enhance their understanding.
• Document all customer interactions accurately in our CRM system for effective follow-up.
• Collaborate with technical teams to ensure seamless service delivery and address customer concerns.
• Stay informed about the latest developments in the cryptocurrency industry to provide relevant information to customers.

Requirements

Who are we?

SupportYourApp is a global Support-as-a-Service leader, partnering with tech companies in 30+ countries since 2010 to deliver secure customer and technical support. What if you had a chance to be a part of the world's leading hardware, software, or SaaS solutions? 

Join our team as an Account Manager and take ownership of a key client relationship.

You will work closely with our leadership team, including the Chief Customer Officer , and be responsible for navigating complex client expectations, aligning priorities, and driving constructive, solution-focused conversations.

This role requires strong stakeholder management skills, cultural awareness, and the ability to build trust in high-pressure environments, while developing a deep understanding of both the technical and business aspects of the client’s product.

If you enjoy owning challenging client relationships and turning complexity into structure — let’s see what it takes 💛

What you will do:

Data Scientist (Full-Stack / Generalist)

Location: Remote / Flexible Type: Full-Time

Compensation: Competitive

We are seeking an experienced, versatile Data Scientist who thrives in a fast-paced startup environment. In this role, you will have the freedom to identify high-impact opportunities, design and implement technical solutions, and measure their success across our global product suite.

We value generalists over specialists. The ideal candidate has broad experience across the entire data science lifecycle rather than deep expertise in just one niche. You should be proactive, self-motivated, and comfortable taking initiative to find problems worth solving. At our firm, you aren't just a number; you maintain ownership of your projects from initial conception to final implementation.

What You'll Do:

AscendEx is a well-recognized global cryptocurrency trading platform. Currently, we are looking for a mid/senior backend developer to join our global team and build out the high-performance, low latency, robust, and scalable core trading system.

Responsibilities:

- Review designs, document technical specifications, and provide time estimates for implementing features/fixes.

- Write high-performance, reusable, modular code along with automated tests.

- Maintain a close working relationship with a geographically distributed development team in an evolving agile environment.

- Follow common design patterns, architectural practices and development methodologies.

- Identify and resolve performance issues to optimize for speed.

Requirements

- 5-12 years of professional work experience in a software development organization.

- 7+ years of professional work experience with Scala, Java, or Go.

- Experience designing and coding large distributed systems with high throughput.

- Demonstrated ability to deliver high-quality software in a fast-paced environment with iterative deadlines.

- A dedicated team player with excellent verbal and written communication skills.

- Able to read, write, and speak fluent English. Mandarin-speaking is a bonus.

- Bachelor's degree in computer science, software engineering or related major.

GoMining is a pioneering digital platform in the Bitcoin mining industry, dedicated to democratizing access to Bitcoin mining through innovative digital mining solutions and strategic partnerships. We work across exchanges, DeFi/Web3 platforms, mining infrastructure, and institutional investment initiatives to provide our clients with diversified opportunities in the digital asset space.

We are looking for a passionate, goal-oriented, and persistent Node.js Developer to join our unique cryptocurrency investment project.

Responsibilities

• Development of a cryptocurrency payment gateway.
• Development of game mechanics.
• Development of an internal transaction system.
• Integration with blockchains: Bitcoin, Ethereum, Binance Smart Chain, Tron, DEX and CEX exchanges, and smart contracts.
• Designing and implementing horizontally scalable service architectures.

Requirements

Data Scientist - Consumer Product Optimization

Location: New York City, London (Office)

Compensation: $250K - $300K

We are seeking an experienced, versatile Data Scientist to join our team, which is focused on a fast-paced consumer-facing product within the fintech or equivalent industry. This is a high-autonomy role where you will have the freedom to identify opportunities, design and implement solutions, and measure their impact across our entire product suite.

We value generalists who possess breadth across the data science field and thrive on end-to-end ownership. You will collaborate with cross-functional teams while driving projects independently from conception to completion.

The Data Scientist will be responsible for leveraging data to drive product decisions, optimize user experiences, and uncover strategic opportunities for growth.

Senior Software Engineer - Cross-Chain Intent-Driven DEX

Location: Remote

Compensation: $140K - $160K

We are a pioneering Web3 infrastructure lab developing intent-based liquidity layers that enable seamless cross-chain interactions. Our mission is to connect AI, services, and financial applications in a real-time, automated world. We are seeking a Senior Software Engineer to spearhead the development of a high-performance frontend and SDK for our cross-chain decentralized exchange (DEX).

In this role, you will leverage technologies like multi-party computation (MPC), chain signatures, and secure enclaves to bridge the gap between EVM and non-EVM chains. You will work at the intersection of business logic and technical execution, collaborating with protocol teams and designers to build a platform where "smart contracts breathe and AI transacts."

Key Responsibilities:

Project Manager - High-Volume Crypto Trading Platform

Location: Remote - European based candidates only

Compensation: $150K - $170K

We lead the way in cryptocurrency trading, operating the largest Telegram trading bot and facilitating over $28 billion in volume for more than 50,000 daily active users. We deliver seamless on-chain trading experiences with advanced tools like DCA, limit orders, sniping, and automatic wallet copy-trading. Join our lean team to contribute to a cutting-edge and widely used product that sets the standard in speed, innovation, and reliability.

We are seeking a Project Manager to oversee task distribution, delivery timelines, and project coordination across our growing development team. This role bridges technical expertise and project leadership, ensuring smooth collaboration and efficient delivery of key initiatives for our high-volume trading platform.

Key Responsibilities:

Senior/Staff Front End Developer - High-Volume Crypto Trading Platform

Location: Remote - US or Europe (Preference for US based candidates)

Compensation: $200K - $300K

We lead the way in cryptocurrency trading, operating the largest Telegram trading bot, facilitating over $25 billion in volume for more than 50,000 daily active users. We deliver seamless on-chain trading experiences with advanced tools like DCA, limit orders, sniping, and automatic wallet copy-trading. We are expanding our influence with a new product, the Trojan Trading Terminal, designed for the web. We are looking for a highly autonomous and driven Senior/Staff Front End Developer to drive the creation of this high-performance web app.

As a Senior/Staff Front End Developer, you will be a key, highly autonomous contributor responsible for translating our robust, high-speed trading capabilities to a new web application. You will collaborate closely with a Senior Full-Stack Developer to ensure the web experience matches our hallmark speed and efficiency.

Key Responsibilities: