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Principal Backend Engineer, FinTech Onramps & On-Chain

Open 27d EuropePrincipal

Principal Backend Engineer at Aave Labs (posted via Framework Ventures) to lead the engineering team behind Push, a regulated non-custodial fiat on/off-ramp. The role sets technical direction and turns regulatory requirements into roadmaps while staying hands-on with on-chain settlement, payment processing, identity controls, and mentoring the team from Dublin.

Principal Backend Engineer, Push

Open 27d Europe, UKPrincipal

Aave Labs is hiring a Principal Backend Engineer to lead the team behind Push, its regulated non-custodial fiat on-ramp/off-ramp. The role is a hands-on technical leadership position designing distributed, event-driven backend services for payments, open banking, compliance, and blockchain settlement, with Rust preferred (Go, Java, or C++ acceptable) and PostgreSQL.

API Api Design Blockchain C++ Fintech +5 skills

Senior Design Engineer

Open 134d RemoteNorth AmericaSenior H-1B sponsor history

Please note that we are unable to consider applications from candidates based in France, Italy, or Germany for this role. Money is moving onto the internet, and the shift has a name: Open Money. This is money that is…

Accessibility Agentic AI AI Blockchain Figma +5 skills

149K – 210K $

DevOps / Site Reliability Engineer

Build and maintain OKX’s AIOps and FinOps platforms, optimize multi-cloud infrastructure, and manage monitoring/alerting stacks like Prometheus and Grafana.

AI API AWS Blockchain CI/CD +17 skills

Senior Product Manager

Open 80d HybridUKSenior

Own and evolve Elliptic’s Real-time Risk product suite, designing scalable blockchain analytics solutions to instantly detect financial crime risks for crypto firms, banks, and government agencies.

Agentic AI AI Analytics Blockchain Go-to-Market

Senior/Principal Product Manager, User Onboarding & Growth (Crypto.com App)

Open 27d HybridAPAC, MENAPrincipal

A senior IC product manager owns the Crypto.com App's customer onboarding and growth funnel end-to-end — KYC/account opening, activation, referrals, and time-to-first-value — plus a trading product slice. The role blends growth experimentation with regulated-platform work, coordinating Engineering, Design, Compliance, Marketing, and Trading.

Cryptocurrency Customer Onboarding Fintech

Senior Security Engineer

Open 27d HybridAPACContractSenior

Hands-on Senior Security Engineer owning the security of a Solana-based decentralized exchange's cloud, production, CI/CD and backend systems on GCP and Kubernetes — building monitoring/alerting, leading incident response, and directly contributing backend and DevOps fixes. Must be based in Singapore or Kuala Lumpur; smart-contract auditing is handled elsewhere.

API Api Security Authentication Automation Blockchain +23 skills

Software / Senior Software Engineer, Mobile

Open 59d APACSenior

Mobile engineer on the Growth team at OKX crypto exchange in Singapore, building and optimizing growth features like onboarding funnels, referral programs, and experimentation frameworks for iOS/Android apps.

AI Android API Blockchain Business Development +6 skills

Senior Staff Software Engineer, Mobile

Open 128d APACStaff

A Senior Staff Software Engineer leads end-to-end mobile growth initiatives for OKX’s crypto exchange, shaping growth systems (funnels, referrals, experiments) and collaborating with product/business teams to drive user metrics. Focuses on mobile-native growth, data-driven decisions, and mentoring engineers.

AI Android API Blockchain Business Development +7 skills

Senior Full-Stack Application & Web3 Developer (Fintech Banking) no vibe coders

Open 27d EuropeContractSenior

Senior full-stack and Web3 developer in Rome who builds all the code for a fintech banking project: stablecoin wallet apps (React Native/Flutter/TypeScript), Solidity smart contracts (Foundry/Hardhat), and Node.js/Go APIs bridging bank cash-management systems to a proprietary EVM Layer 1, on PostgreSQL/Linux with AWS CloudHSM/KMS key security.

API AWS Blockchain EVM Fintech +13 skills

Senior Backend Engineer - Engine

Open 96d APACSenior

Build and scale the backend platform for a high-growth online casino gaming server using Go and Rust, with Kubernetes, Terraform, and ClickHouse.

AI ClickHouse Cloud Data Engineering DevOps +4 skills

150K – 220K AUD

The Bitcoin Street Journal

Remote Senior Backend Engineer, Cross-Chain DeFi

Open 27d North AmericaSenior

Chainlink Labs is hiring a Senior Backend Engineer to design and maintain services for its CCIP cross-chain protocol, focused on fast, fault-tolerant cross-chain transactions under adversarial conditions. Day-to-day work spans backend services, RPC optimization, latency reduction, and internal incident-response tooling.

Senior Backend Engineer: Core Wallet & Web3 APIs

Open 27d North AmericaSenior

A senior backend engineer at Ava Labs owns Core backend services and contributes to the Core browser extension wallet for the Avalanche ecosystem, building distributed, highly scalable APIs and secure user-facing systems. Core stack: TypeScript/Node.js, React, and AWS, working alongside frontend, design, product, and security teams.

API AWS Node.js React TypeScript

Atrium Workforce Solutions UK Limited

VP Full Stack Engineer - Angular & Solidity/Java

Open 27d HybridUKContractC-level Licensed UK sponsor

12-month contract (Inside IR35) hiring 3 VP-level full stack engineers, fully onsite in London: roughly 70% Angular/TypeScript front-end work combined with ~30% Java server-side or Solidity smart-contract development on Ethereum/blockchain.

AI Angular Blockchain DeFi Ethereum +5 skills

633 – 750 £ / day

VP Full Stack Engineer – Angular & Java/ Solidity (smart contracts on Ethereum/blockchain)

Open 27d HybridUKContractC-level

12-month contract (Inside IR35) for VP-level engineers working 5 days onsite in London, split roughly 70% Angular front-end development and 30% Java server-side or Solidity smart-contract work on Ethereum/blockchain/DeFi systems. Full-stack role requiring coverage of at least two of the three skill areas, with front-end the top priority.

AI Angular Blockchain DeFi Ethereum +3 skills

ellipsislabs.xyz

Senior Backend Engineer

Open 27d UKSenior

Ellipsis Labs, an early-stage startup, is hiring a Senior Backend Engineer in the UK to build and maintain scalable production services (currently thousands of QPS, expected to grow 10x), implement micro/nanosecond-level performance monitoring, and drive initiatives like realtime data indexing at scale. The stack leans Rust, AWS, and Solana/blockchain for decentralized finance.

Blockchain Cloud Rust Unix

Senior Java Developer — FinTech, High-Scale Hybrid

Open 27d HybridUKSenior Licensed UK sponsor

Senior/Principal Java Developer joining a FinTech engineering team in London on a hybrid basis, building high-scale, business-critical distributed systems and APIs at the intersection of financial services and digital assets. Core stack is server-side Java on Linux, with trading and blockchain exposure valued.

API Blockchain Distributed Systems Fintech Java +1 skills

Senior Java Developer

Open 27d UKContractSenior Licensed UK sponsor

Contract Senior/Principal Java Developer in London (hybrid) building high-scale, business-critical server-side systems at the intersection of financial services and digital assets. Core stack is Java on Linux with strong distributed-systems focus; blockchain experience (EVM, Canton, Solana) is a big plus.

API Blockchain Distributed Systems Ethereum EVM +5 skills

up to 750 £ / day

KMC Solutions Inc

XTN-3D7B421 | SOFTWARE ENGINEER

Open 27d RemoteAPAC

Researches blockchain and cryptocurrency projects and writes 2,000–3,000-word scripts for crypto YouTube videos, producing about four scripts a week with a producer. Despite the 'software engineer' title, this is a content research/writing role, remote with occasional meetings in BGC, Manila.

Blockchain Cryptocurrency

Bitfia Technologies

Technical Lead & Sr Developers Web And Blockchain Applications

Open 27d APACFull-timeLead

Senior engineers at Bitfia (maker of the iPint platform) own backend services, APIs and payment infrastructure — including stablecoin/blockchain payment rails — while contributing to frontend and using AI-native dev tools. Stack: Python/Go/Node, React/Angular/Vue, PostgreSQL/MongoDB/Redis, AWS/GCP/Azure, Docker/K8s, Solidity/EVM.

AI Angular API Authentication AWS +32 skills