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.

Senior Full Stack Engineer

Location: EST Preferred, will consider strong candidates in PST to GMT, but they must be willing to work majority EST hours.

Remote | Full-time

Compensation: $175K - $225K

Our client is a venture-backed financial technology firm on a mission to transform the global movement of money. By building a full-service platform for the issuance, management, and integration of stablecoins, the organization aims to provide a faster, more efficient, and more transparent financial fabric. The platform makes digital dollars programmable, composable, and ubiquitous, serving as foundational infrastructure for developers, fintechs, and institutions alike.

The engineering team combines the discipline of high-performance finance with the creative agility of a crypto-native startup. As a Senior Fullstack Engineer, the successful candidate will take end-to-end ownership of features and products across the entire stack—from user interfaces to robust backend infrastructure. This role requires an engineer with strong product taste, a bias toward MVP thinking, and the ability to navigate complex backend systems and API designs with equal proficiency. This is a remote-first position. Candidates must be able to maintain a majority overlap with US Eastern Time (ET) business hours.

Senior Compliance Officer

Location: Luxembourg

On-Site | Full-time

Compensation: €80K - €120K

Our client is a leading, regulated cryptocurrency exchange with a significant global presence across Asia, Europe, and the United States. As one of the first digital asset platforms to secure licenses to operate in multiple major jurisdictions simultaneously, the organization operates as a financial institution licensed by the Luxembourg Ministry of Finance and is regulated by the CSSF.

Our client is seeking an experienced and enthusiastic Senior Compliance Officer to join the team in Luxembourg City. This is a critical second-line-of-defense role that offers the opportunity to collaborate on unique projects and product launches within the rapidly evolving crypto landscape. The successful candidate will support the EU Head of Compliance in ensuring that adequate financial crime and consumer protection oversight mechanisms are in place, while performing rigorous compliance testing and monitoring.

Key Responsibilities

Senior Web3 Software Engineer

Location: Europe/US/Latam

Remote | Full-time

Compensation: $170K - $195K

Our client is a pioneer in the blockchain sector, developing a high-performance operating system designed to redefine scalability and throughput for Ethereum. By combining parallel transaction execution with advanced state minimization, our client’s platform overcomes traditional protocol limitations to provide a groundbreaking environment for decentralized development.

Since its initial launch in 2019, the organization has remained dedicated to enhancing Ethereum's ecosystem through technical innovation, including the creation of a bespoke virtual machine and a specialized programming language. The team is a globally dispersed group of innovators committed to shaping the future of blockchain technology through secure, decentralized, and high-throughput solutions.

Our client is seeking a Senior Web3 Software Engineer to lead the development of high-performance decentralized applications (dapps). This individual will own major product surfaces end-to-end—from frontend interfaces to on-chain integrations—collaborating across product, design, and smart contract teams to deliver secure and intuitive experiences for traders and users.

Key Responsibilities

Senior Software Engineer

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.

Remote | Full-time

Compensation: $160K - $240K

Our client is an industry-leading organization comprised of experts in blockchain technology, cryptography, infrastructure, and security. The organization is currently developing the foundational wallet infrastructure for the next generation of global finance.

The Senior Software Engineer will design, develop, and scale core backend services for a high-performance platform. This role involves full ownership of critical projects—ranging from APIs and microservices to databases and developer tooling—ensuring all systems remain fast, reliable, and secure. Beyond hands-on engineering, this individual will contribute to architectural decisions, refine development processes, and ensure infrastructure resilience under real-world financial workloads. This position requires close collaboration with product, security, and leadership teams to transform complex requirements into elegant, production-ready systems.

Key Responsibilities

Location: Remote - European Based Candidates

Remote | Full-time

Compensation: Competitive

We are hiring on behalf of our client who is focused on building institutional-grade DeFi operations infrastructure. They are seeking a Senior Operations Engineer. This organization develops the systems, automations, and security layers required to make on-chain asset management reliable at scale. Operating across Ethereum, Arbitrum, and multiple other chains, the client manages vaults, multisigs, and treasury systems where precision is paramount.

This is not a "build-and-hand-off" role. The successful candidate will own the full lifecycle of critical automation infrastructure—from architecture and implementation to monitoring, failure handling, and continuous hardening. This individual will be responsible for the reliability, security, and observability of systems where the standard is absolute: operational errors result in real financial loss.

Key Responsibilities

Head of B2B Sales & Business Development (Web3 / DeFi)

Location: Remote in EU

Remote | Full-time

Compensation: $50K - $70K

Our client is a high-performance DeFi Trading & Intelligence platform purpose-built for the Solana ecosystem. The organization delivers institutional-grade on-chain analytics, smart-money flow detection, social sentiment tracking, and fraud prevention via a sophisticated B2B API. Their technology processes hundreds of millions of blockchain transactions in real time, powering critical risk detection and market insights across fast-moving decentralized markets.

As tokenized real-world assets—including equities and commodities—increasingly migrate on-chain, our client is extending its intelligence stack beyond native crypto into the next generation of decentralized financial markets. To lead this expansion, the firm is seeking a hands-on, crypto-native Head of B2B Sales & Business Development to build the entire commercial function from the ground up. This is a "zero-to-one" leadership role with full ownership over go-to-market strategy, pricing models, and vertical expansion.

Key Responsibilities

Senior Backend Engineer

Location: EMEA / EU Hours - Authorised to work in EMEA

Remote | Full-time

Compensation: €90K - €130K

Our client is a high-growth fintech leader specializing in simplifying multi-chain DeFi for traditional financial institutions, fintechs, and service providers. By offering a unified API, the platform provides seamless access to on-chain liquidity across all major blockchains for optimized same-chain and cross-chain swaps. The organization is on a mission to enable a fairer, decentralized world while prioritizing exceptional user experiences to make complex technologies accessible to a global audience.

The organization is seeking multiple Senior Backend Engineers to lead the design, development, and maintenance of robust, scalable, and secure backend systems. Reporting to the Backend Lead, the successful candidates will collaborate with cross-functional teams— including frontend developers, product managers, and designers—to deliver high-quality software solutions. The technical environment utilizes a modern stack including Node.js (TypeScript), MongoDB, Redis, and ethers.js, supported by a GitOps CD chain involving Kubernetes and AWS.

Key Responsibilities

Staff Full Stack Engineer

Location: New York

On- site | Full-time

Compensation: Competitive

Our client is a premier development organization responsible for building and operating a high-stakes technology stack that powers one of the largest and most active token launchpads in the decentralized finance (DeFi) ecosystem. The systems involved are engineered for low latency and high throughput, operating under constant, significant load where precision and system reliability are critical.

The organization is seeking a Full Stack Engineer to play a vital role in scaling cutting-edge platforms at the intersection of cryptocurrency and social finance. This individual will work across the entire technical stack to deliver high-performance, user-centric applications. The environment is characterized by an intense pace, high expectations, and immediate real-world impact. This role is ideal for a high-agency engineer who thrives on ownership and is motivated by the challenge of building products used by massive, global audiences.

Key Responsibilities

Senior Staff Backend Engineer

Location: Manhattan, New York

Onsite | Full-time

We are hiring on behalf of our client who is the development powerhouse behind one of the largest and most high-traffic platforms in the digital asset space. Currently processing ~$1B in daily volume, their technology stack handles low-latency, high-throughput, and constant load at a scale few companies ever reach.

The Role

In this role, you will act as a technical anchor, overseeing the integrity and evolution of their core backend systems. You will balance high-level architectural governance with deep-tier execution, driving technical excellence from the front. Your primary focus will be the proactive mitigation of scaling risks and the design of durable, fault-tolerant systems capable of sustaining high-throughput workloads.

What You’ll Do: