Backend Software Engineer - Digital Money & Global Payments

Location: New York (Hybrid)

Compensation: $150K - $200K

We are a lean and mighty team of passionate builders and veteran founders, backed by top investors in fintech and crypto. Our mission is to empower the next generation of money and financial products globally. We are seeking a Backend Software Engineer to join us at the cutting edge intersection of real-world payments and digital money, where you will deliver massive impact at a small, quickly growing company.

You will be a critical part of defining our technical and product roadmap, operating within an open and flat structure where you have the freedom to explore ideas and influence the company's vision. You will focus on scaling our infrastructure to handle millions of end-users globally while driving key architectural decisions for our rapidly evolving product.

What You'll Do:

ADAPTIT S.A. is a specialized ICT Group delivering high-quality services, innovative solutions, and premium support to organizations across telecom, finance, utilities, transport, retail, and enterprise sectors. Guided by our vision to be the trusted partner for seamless connectivity and cybersecurity, we stay at the forefront of technological advancements in Greece and beyond. Our mission is to create lasting impact through strong partnerships, deep expertise, and resilient, future-ready solutions. Since 2012, we have proudly showcased our work at MWC and remain active members of international business chambers.  

Our culture is grounded in trust, ownership, and collaboration, where open communication, shared purpose, and continuous growth define how we work. As a team, we stay agile and customer-focused, committed to delivering innovative solutions that create value for our people and clients alike. 

As a Project Manager (PMO – Telecom & Technology Projects) youwill oversee the planning, execution, and delivery of technical and infrastructure projects, ensuring timely, cost-effective, and high-quality outcomes.

Validator BD Lead - High-Performance Blockchain Infrastructure

Location: Remote - Europe or North America

Compensation: $140K - $150K

We are reengineering blockchain infrastructure from first principles to make global digital markets as precise and dependable as physical systems. Built on a leading high-performance blockchain, our platform delivers deterministic execution, guaranteed inclusion, and low-latency performance, solving foundational failures that plague current systems. We are building the reliability and control institutions demand, and we are seeking a Validator BD Lead to drive the adoption of this critical infrastructure across the validator ecosystem.

As the Validator BD Lead, you will own and drive the validator engagement strategy, serving as a critical, high-ownership role that will shape our go-to-market efforts and partnership model as we prepare for mainnet. You will lead efforts to build relationships with top-tier validators and ensure successful adoption of our infrastructure.

Key Responsibilities:

Trust & Compliance Officer - Blockchain Wallet Infrastructure

Location: Remote - Must be in the European Union (remote-first, office optional). France/ Paris or as close as possible, is always preferred.

Compensation: $95K - $165K

Join a stellar team of leaders and experts in blockchain technology, cryptography, infrastructure, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Trust & Compliance Officer to manage our security frameworks and global regulatory requirements, ensuring we meet the highest standards of trust, resilience, and compliance across various financial and digital asset regulations worldwide.

Reporting to the CISO, this role demands both precision and adaptability. You will be the central figure for all trust, security, and compliance matters, designing and enforcing compliance programs, leading audits, and acting as the main point of contact for clients and regulators. You will also integrate compliance requirements into product architecture and support clients in meeting their own regulatory obligations.

Responsibilities:

Strategic Account Manager - Blockchain Wallet Infrastructure

Location: Remote - US based, not Canada. EST time preferred

Compensation: $95K - $165K

Join a stellar team of leaders and experts in blockchain technology, cryptography, infrastructure, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We are seeking a Strategic Account Manager to own post-close success and growth across North & South America, ensuring client retention and deepening engagement with institutions, fintechs, and crypto-native firms. This is a critical commercial and technical role.

Reporting to the Head of Americas, you will act as a trusted partner to a portfolio of active accounts, guiding them through onboarding, adoption, and renewal. You will be responsible for navigating complex technical environments that combine APIs, cloud deployments, legacy systems, and regulatory requirements, driving upsells and securing long-term partnerships.

Responsibilities:

Senior Marketing Manager - Stablecoin Infrastructure

Location: New York City (Hybrid)

Compensation: $160K - $220K

We are building a full-service platform to transform how money moves, driven by the belief that stablecoins will underpin a new financial fabric that is faster, more global, and more efficient. Our platform makes issuing, managing, and integrating stablecoins seamless for developers, fintechs, and institutions. Backed by world-class investors, we are growing a team to reimagine how value moves online and are seeking an experienced Senior Marketing Manager to lead our marketing strategy.

This role is an exciting opportunity for a creative and analytical individual with deep expertise in the fintech or crypto/blockchain industry who has a proven track record in navigating regulated markets. This position will initially be an Individual Contributor role with the opportunity to grow into a leadership position. You will lead our marketing strategy, ensuring compliance with complex regulations while driving brand growth, demand generation, and customer engagement.

Key Responsibilities:

Software Engineer - Founder Accelerator Infrastructure

Location: New York City (Non-Negotiable Onsite/Relocation Required)

Compensation: $180K - $260K

We are the leading accelerator for crypto founders, having backed over 300 startups that are now collectively valued at over $10 billion. We are a small, high-trust, high-performance team of builders (ex-Meta, YC, Coinbase, and founders) backed by S-tier investors. We are hiring a Software Engineer to join our in-house engineering team and own features from requirements definition through production launch.

Reporting directly to the CTO, you will be a product-minded, hands-on Individual Contributor who owns the delivery of core products end-to-end. This means turning ambiguous problems into high-quality, shipped software that directly accelerates the next generation of top crypto and AI founders.

What you’ll do:

Senior/Lead Smart Contract Engineer - Decentralized Perpetuals Exchange

Location: Remote - US or EU if willing to overlap 6+ hours with ET

Compensation: $250K - $500K

We are building the backbone of global decentralized finance (DeFi), operating the largest perpetual exchange on Arbitrum and processing over $20 billion in cumulative trading volume. Our platform enables leveraged trading of real-world assets (RWAs)—commodities, forex, indices, and stocks—alongside crypto, bringing global markets on-chain with full self-custody. Backed by General Catalyst and Susquehanna International Group, we are a small team providing institutional-grade reliability for a protocol handling billions in volume.

We are seeking an exceptional Senior or Lead Smart Contract Engineer to help scale our protocol as we expand to hundreds of markets and billions in daily volume. You will work directly with our founding team (backgrounds from Harvard, Bridgewater, and BlackRock) to architect and implement critical protocol upgrades and new market mechanisms for the next generation of on-chain derivatives.

This is not a junior role. We need an expert who has built and maintained perpetual Decentralized Exchange (DEX) smart contracts in production at scale.

Key Responsibilities:

Senior Core Systems Engineer - Secure 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: $180K - $260K

Join a stellar team of leaders and experts in blockchain technology, cryptography, infrastructure, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We are hiring a Senior Core Systems Engineer to design, build, and scale the low-level systems at the heart of our platform, where performance, security, and correctness are non-negotiable. This is a high-impact role focused on turning advanced cryptography into fast, resilient, and trusted production infrastructure.

As a Core Systems Engineer, you will work deep in the stack, designing and scaling reliable distributed services and integrating them with cloud, hardware, and blockchain environments. You will collaborate across product, research, and security to implement advanced cryptographic and security protocols using low-level systems languages.

Responsibilities:

Senior Backend Engineer - Stablecoin Infrastructure

Location: Remote - Based in EST timezone

Compensation: $175K - $225K

We are a technology company building a full-service platform that transforms how money moves. Our mission is to make digital dollars the core of a new, global financial fabric—faster, more efficient, and universally accessible. We are creating foundational infrastructure that makes issuing, managing, and integrating stable, dollar-based value on-chain seamless for developers, fintechs, and institutions. We are backed by world-class investors and are growing a team to reimagine how value moves online.

We are seeking a Senior Backend Engineer to accelerate the delivery of both critical internal tooling and high-impact customer-facing products. You will join a small, high-performance team that applies the discipline of high-performance finance to a fast-moving, crypto-native startup environment.

In this role, you will: