Backend Engineer - Card Transaction Processing
Ether
About us Ether.fi is one of the largest crypto companies in the world. We have over $10B in assets under management and a team of 30 almost all technical staff. We’ve been profitable day one and are focusing on building real consumer applications. The future we envisage is true on‑chain banking. Our current products; Stake, Liquid, and Cash enable users to earn yield in a variety of DeFi strategies, and spend their assets in the real world with our credit cards. You can view public analytics on Dune for Cash and Stake. Position overview We’re looking for a senior full backend software engineer to own core backend architecture, card transaction processing and high availability. You will belong to a key engineering team focusing on delivering distributed, scalable and robust backend systems. Everything from card transaction processing, low latency apis, microservice architectures and on-chain data indexing. Anything that a neobank would build is on our roadmap. What you’ll do Own core areas of our backend systems, and extend current functionality to improve throughout and latency Design, develop, and optimize scalable transaction processing services to support high‑throughput, low‑latency financial transactions. Tackle the challenges in user frictions for their card transactions being declined Drive improvements in our Cloud Infrastructure, CI/CD pipelines, automation, observability, and monitoring systems. What we are looking for Strong fundamentals in software engineering and problem solving You have shipped impressive products with thousands of real users 5+ years of professional coding experience Drive, willingness to work hard and go the extra mile. We are a highly ambitious, driven team with audacious goals, and we work very hard to make them a reality Plus if you are experienced in credit card transaction processor such as Paymentology, Episode 6, etc. Plus if you are experience in card issuing side Perks and benefits Competitive salary, performance‑based incentives, and token allocation grant Opportunity to work on multi‑billion dollar products as part of a small team Health, dental, and vision insurance plans Global team with opportunity for travel and working out of our 3 offices around the world 4 weeks work from anywhere Exciting company events and team‑building off‑sites #J-18808-Ljbffr Ether
- ...exchange balances, or fiat from a card or bank account, all in a... .... Our goal is simple: make transacting with any asset feel... ...the Role We're looking for a BackEnd Engineer to join our growing team at... ...Background with high-scale payment processing or financial compliance...SuggestedWork at officeRemote work
- ...profitable products, delivered top-notch transaction processing platforms, created beautiful mobile... ...do it. What we're looking for As a Backend Engineer, you’ll design, develop, and maintain... ...systems that our business depends on (e.g. card payments, treasury management,...SuggestedFull timeRelocation package
- ...our families. As a software engineer at Frec, you’ll create products... .... What you will do: Backend Engineering: You will be working... ...Distributed Systems & Data Processing: You’ll tackle complex backend... ...around data consistency, transactional integrity, and high availability...SuggestedWork at officeFlexible hours
$120k - $160k
...money, and stress. It starts with Made Card - a credit card designed specifically for... ...home. About the Role We’re looking for a Backend Engineer to help build and scale the services... ...company holidays Throughout the interview process, please remember that emails will only...SuggestedLocal areaFlexible hours$146k - $175k
Join to apply for the Backend Engineer (United States & Canada) role at CoinTracker Join to apply... ...our mission, culture, and hiring process. Overview CoinTracker makes cryptocurrency... ...platform to handle millions of transactions efficiently Build a smart trade insights...SuggestedFull timeRemote work$140k - $240k
Overview The Backend Engineer on the AI Platform team plays a critical role in building and evolving... ...that support complex business processes across loans, documents, accounts, users... ...to service architectures that support transactional, operational, analytical, and AI‑...Local areaRemote workFlexible hours$10k
...combines payments, corporate cards, vendor management, procurement... .... Join our growing Ops Engineering team and help build internal... ...experiences Develop robust backend services and APIs that power... ...information during the hiring process. Ramp Applicant Privacy Notice...Full timeWork at officeHome officeRelocation packageFlexible hours- ...Astra Astra is a high-impact engineering team building mission-... ...fintech platform powers payment processing, fraud detection, and financial... ...handling 100M+ in weekly transaction volume. We maintain 99.9%+ uptime... ...We're looking for a Senior Backend Engineer to architect and...Remote workFlexible hours
ASTRA
New York, NY5 days ago $190k - $345k
...looking for an ambitious, detail-oriented Staff Backend Engineer with an enthusiasm for building and scaling feature... ...infrastructure software that will eventually process billions of dollars a day worth of transaction volume, including highly performant blockchain indexing...Full timeRemote workKubelt
New York, NY4 days ago$130k - $187k
...aims to create a thriving engineering organization that supports... ...is specifically within the Card team, which is focused on the... ...Developing robust and scalable backend services and APIs to manage... ...card lifecycle, facilitate transaction processing, and integrate with...Remote workShift work- ...About the role Heron processes millions of sensitive financial documents... .... The challenge is that our backend was built for speed-to-... ...that let a 15-person engineering team ship product confidently... ...20 million individual bank transactions daily for our customers. We...Full timeWork at office
Heron Data
New York, NY5 days ago - ...company based in the United States is seeking a Senior Backend Software Engineer to architect and scale payment processing systems. You will manage mission-critical financial systems handling billions in daily transactions while ensuring compliance and integrity. Ideal...
- Polymarket is seeking a skilled backend engineer in New York to join the Onchain Execution team. This role involves designing systems for transaction processing on our prediction market platform, requiring deep blockchain knowledge and 5+ years of backend development experience...
- ...tools for over 10 million users, processing more than $250B+ in annual transaction value. In 2024-2025, Moniepoint... ...fintech unicorns. About the role Engineering at Moniepoint is an inspired, customer... ...scalable, production-ready backend systems. Spearhead key initiatives...Work at office
- ...of supported projects, and infrastructure processing millions of transactions seamlessly. The Role As part of the Nitro Backend team at Offchain Labs, you will work on the... ...our research, product, and blockchain engineering teams, working at the cutting edge of blockchain...Work at officeImmediate startRemote workHome office
- ...We're a small team that came from trading, quant, and engineering roles at tier one financial institutions who were previously... ...the market. We are now building a platform which can process the most complex transactions executed across financial markets. We are building this...Work at office
$100 per hour
Overview Join as a Backend Engineer and help rebuild payments for the >$1tn distribution industry. You’ll architect and build the systems that process millions of dollars in transactions daily, integrate with complex ERP systems, and leverage cutting-edge LLM technology...Remote jobFlexible hours- ...the leading provider of personalized transactional communications for retailers, enabling... ...ROLE flexEngage is looking for a Senior Backend Engineer to work on our products and platforms.... ...in all aspects of the development process including story grooming, technical design...Remote workFlexible hoursDay shift
$180k - $315k
...up their payroll, corporate card, computer, benefits, and even... ...looking for a Staff Software Engineer to join our Scheduling team.... ...maintainable, and high-performance backend systems that power critical... ...team culture, structure, and processes. What you will need...Hourly payWork at office3 days per week- ...artists up to $7 million per transaction. The proprietary model... ...do. We are seeking a skilled Backend Developer with experience in... ...collaborate closely with data engineers, data scientists, and cross-... ...end systems to support data processing, analysis, and API services....Immediate startFlexible hours
Duetti
New York, NY1 day ago $150k - $200k
...money, and stress. It starts with Made Card - a credit card designed specifically for... ...the Role We’re looking for a Staff Backend Engineer to lead the architecture, development,... ...backend architecture, coding standards, and processes for rapid, high-quality delivery....Local areaFlexible hours- ...creator monetization and platform‑wide transactions. Our work ensures creators can... ...For We’re looking for a Senior / Staff Backend Engineer (API) - Economy to join our Economy team... ...ownership, creator monetization, payment processing, and economic analytics at global scale...Remote workFlexible hours
- Backend Engineering Lead As a Backend Engineering Lead at the Wormhole Foundation, you will make... ...data pipelines supporting wallets, transactions, and blockchain integrations. Build... ...data indexing, analytics, and event processing. Integrate new blockchain ecosystems...Work experience placementRemote work
- We are looking for backend engineers to build, or rebuild, rock solid services with a laser focus on scalability and maintainability. PayPay Card aims at revolutionizing the credit card industry, making payment easier than ever, from two different angles: Bring the credit...
- ...started with co-branded credit cards and rebuilt them to be... ...systems end-to-end : from transaction authorization and ledger... ...credit decisioning, to rewards engines and payment processing. Build net-new products,... ...building production backend systems (fintech experience...Flexible hours
- ...entertainment, media, and audience-led investment is seeking a Lead Backend Engineer to take ownership of its platform’s core systems. This is a... ...as a hands-on individual contributor Establish engineering processes and best practices Collaborate closely with product and...Remote workFlexible hours
- ...is building a premium, US-issued credit card for borderless people. They are currently... ...beta and growing their team with talented engineers who want to shape the future of financial... ...Role Overview Our client is looking for a Backend Engineer with strong fundamentals in...For contractorsRemote work
$110k - $270k
Maxana is seeking an experienced Backend Engineer for a confidential client — a well-funded AI platform company used by ML teams globally... ...Evaluate and strengthen technical architecture, tooling, and processes Champion software quality, drive continuous delivery, and...Flexible hours2 days per week- ...edge LLM-powered tools to supercharge the investment research process for private market investors. Our clients include several of... ...about the company mission & values here . Role Description As a Backend Engineer , you’ll help build and scale the systems that power our AI-...Summer workWork at office
- ...foundation for verifiable finance, an economic system where every transaction, order, and settlement can be proven on-chain with... ...with potential for extension The Role We’re expanding our backend engineering team in Latin America to design and deliver the infrastructure...Contract workRemote work
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