Senior Software Engineer - EMEA

Full time
Hybrid
Compensation is not specified
Role
Software Engineer
Work Experience
More than 3 years
Description

Blockchain technology is revolutionizing industries worldwide, enabling more efficient banking, enhanced customer connections, and the investigation of criminal cases. As blockchain adoption continues to rise, organizations are increasingly seeking ways to harness the full potential of this ecosystem. This is where Chainalysis excels. We offer comprehensive insights into blockchain activities through our data, services, and solutions, empowering organizations to confidently navigate the world of blockchains.

The engineering team at Chainalysis is driven by the pursuit of solving the most challenging technical problems and creating products that foster trust in cryptocurrencies. Our global organization spans Denmark, the UK, and the USA, with teams that thrive on the complex and dynamic work we do, supported by exceptionally talented colleagues. In an industry that evolves daily, our mission is to develop user-facing products backed by a flexible and scalable data platform, allowing us to adapt to rapid changes and deliver value to our customers.

As a Software Engineer within Investigations, you will become part of a team of engineers responsible for providing the right tools and data to create best-in-class customer experiences. You will have the opportunity to lead, build, and maintain new customer-facing web frontend features, as well as the services that support them. This role also involves gaining a deep understanding of the underlying data platform, allowing you to collaborate closely with product managers and designers to deliver impactful solutions to our customers.

In your first year, your priorities will include:

  • Establishing a smooth and sustainable collaboration within your team, focused on generating impact and minimizing time spent on maintenance and bug fixes.
  • Becoming a key contributor to solutions characterized by high availability and low maintenance requirements, in close collaboration with your team.
  • Cultivating your curiosity about cryptocurrencies and decentralized finance, actively seeking knowledge, and collaborating with individuals closely tied to our products to gain customer insights and valuable data platform insights.

Qualifications:

  • Proficiency in object-oriented programming languages, with a focus on Java for our Spring-based backend services.
  • Experience in frontend development, particularly with React and Angular.
  • Ability to build and maintain services, including monitoring and maintenance of shipped features/services. Familiarity with tools like Datadog and Humio.
  • Experience in shipping and iterating in collaboration with design and product partners.
  • Familiarity with cloud providers, ideally AWS.
  • Knowledge of infrastructure as code (IaC) tools such as Terraform, Terragrunt, and CloudFormation.
  • Experience in mentoring and/or leading other engineers.

At Chainalysis, we assist government agencies, cryptocurrency businesses, and financial institutions in tracking and investigating illicit activities on the blockchain, enabling them to confidently engage with cryptocurrency. We prioritize our employees with outstanding benefits, professional development opportunities, and a fun work environment.

You belong here.

At Chainalysis, we believe that diversity of experience and thought makes us stronger. With both customers and employees around the world, we are committed to ensuring that our team reflects the unique communities around us. To foster ongoing learning, we have established an internal Diversity Committee, observe Days of Reflection throughout the year, including International Women's Day, Harvey Milk Day, World Humanitarian Day, and UN International Migrants Day, and are dedicated to continually revisiting and reevaluating our diversity culture. We encourage applicants of all races, ethnicities, genders/gender expressions, ages, spiritual beliefs, abilities, experiences, and more. Additionally, if you require any accommodations to make our interview process more accessible due to a disability, please don't hesitate to inform us. You can learn more here. We can't wait to meet you.

Applying from the EU? Please review our Chainalysis Applicant Privacy Policy.

By submitting this application, I consent to and authorize Chainalysis to contact my former employers, as well as any and all other individuals and organizations who may possess information relevant to my qualifications for employment. I further authorize the listed employers, educational institutions, and personal references to provide Chainalysis (without further notice to me) any and all information about my previous employment and education, along with other pertinent information they may have, and hereby waive any actions which I may have against either party(ies) for providing a reference. I understand any future employment will be contingent on the Company receiving satisfactory employment references.

 

Skills Required
Avatar
Chainalysis
Company size
Not specified
Location
United Kingdom
Description
Not specified

More Full-time Jobs

Show more

Web3 + Supabase Developer Needed to Complete BSC Testnet Waitlist & Staking Platform

Washington, USA
Washington, USA
Part time
Remote
📌 Job Description
 
We are building a production-ready Web3 waitlist and dashboard platform using Next.js 15 (App Router), BSC Testnet, Supabase, and Wagmi v2.
The core architecture, database schema, and feature roadmap are already defined. We are looking for an experienced developer to complete, polish, and harden the project.
 
This is not a prototype — the goal is a fully working, deployable system with clean code, security best practices, and proper Web3 UX.
 
🧩 Project Overview
 
The platform includes:
Wallet-based user registration (BSC Testnet only)
Automatic network detection & switching
Supabase-backed user management
Automatic virtual card generation (Bronze / Silver / Gold)
Token staking system with transaction logging
Referral system with rewards tracking
Dashboard with analytics & history
X (Twitter) OAuth integration
Discord bot with XP & invite tracking
A detailed README and database schema are already prepared.
 
✅ Responsibilities
 
You will be responsible for:
 
Completing and stabilizing the Next.js App Router implementation
Finalizing wallet connection & network enforcement (Chain ID 97)
Ensuring Supabase RLS policies are correct and secure
Implementing or completing:
Staking flows (stake, unstake, claim, emergency withdraw)
Referral tracking & reward logic
Dashboard analytics & transaction history
Finalizing X (Twitter) OAuth integration
Reviewing and improving overall code quality & structure
Fixing bugs, edge cases, and UX issues
Preparing the app for Railway deployment
(Bonus) Improving performance and Web3 UX
 
🛠 Tech Stack (Must-Have Experience)
 
Required:
 
Next.js 14/15 (App Router)
TypeScript
Wagmi v2 + WalletConnect
EVM chains (BSC preferred)
Supabase (Postgres, RLS, triggers, SQL functions)
Tailwind CSS
Web3 transaction handling & logging
 
Nice to Have:
 
Discord bot development (Node.js)
OAuth 2.0 (X / Twitter)
Smart contract interaction (staking contracts)
Framer Motion
shadcn/ui / Radix UI
 
🔒 Security Expectations
 
You must be comfortable with:
Wallet validation & chain enforcement
Preventing self-referrals & abuse
Transaction hash uniqueness checks
Secure handling of OAuth tokens
Supabase RLS & role-based access
 
📦 Deliverables
 
Fully working, deployable application
Clean, documented codebase
Verified Supabase schema & policies
Functional staking & referral systems
Deployment-ready build (Railway)
Basic handover documentation
 
⏳ Timeline
 
Estimated duration: 2–4 months
Start: Immediately
Potential for long-term collaboration
 
💰 Budget
 
Open to fixed-price or hourly
Please include:
 
Your estimated timeline
Relevant Web3 / Next.js projects
Any questions or suggestions to improve the system
 
🧠 How to Apply
 
When applying, please answer:
 
Have you built production Web3 apps with Next.js + Wagmi before?
Have you worked with Supabase RLS & SQL triggers?
Share 1–3 relevant projects (GitHub or live links)
What risks or improvements do you see in this architecture?
Generic proposals will be ignored.
Payment in Crypto
4,500
Monthly
See details

Senior Web3 / Crypto Trading Platform Developer

Full time
Remote
PumaPulse is launching a new standalone domain focused on building professional-grade crypto trading platforms and on-chain trading tools. We are seeking an experienced freelance Web3 developer to help design, build, and evolve a scalable trading product with commercialization potential.ResponsibilitiesDevelop crypto trading tools, bots, or SaaS platformsIntegrate with DEXs and on-chain protocols (e.g., Solana, Ethereum)Implement real-time blockchain data monitoring and trade executionEnsure security, performance, and MEV-aware designCollaborate on product roadmap, strategy, and future featuresRequirementsStrong experience in Web3 and DeFi developmentProven work with crypto trading bots or on-chain trading systemsExperience with at least one major blockchain ecosystemSolid understanding of smart contract interaction and security best practicesAbility to deliver production-ready code and communicate clearlyNice to HaveExperience productizing tools into SaaS platformsBackground in advanced trading strategies or MEVPrior work with VC-backed or early-stage Web3 projectsEngagementFreelance / contract roleCompetitive compensation based on experiencePotential for long-term collaborationApply with relevant Web3 projects, GitHub links, and availability.
Payment in Crypto
50-80
Monthly
See details

Fullstack Developer Needed for Web3 Prediction Market Platform

Brooklyn, USA
Brooklyn, USA
Full time
Remote
Summary
We're looking for an experienced Blockchain / Full-Stack Developer to help build a production-ready MVP for a Web3 prediction marketplace.
We’ve already built a basic UI prototype using vibe coding. The goal now is to turn this prototype into a functional, scalable dApp with clean architecture and solid Web3 fundamentals.
This is not a tutorial or experimental project — We’re looking for someone who has real experience shipping blockchain/web3 products.
What You’ll Do
Review and improve an existing UI prototype
Build smart contract logic for a prediction marketplace MVP
Integrate blockchain functionality with the frontend
Develop backend / API logic as needed
Ensure clean, maintainable, production-ready code
Collaborate on product decisions and MVP scope
Tech Stack (Preferred)
Frontend: Next.js / React
Backend: Node.js
Blockchain: Solidity / Rust
Experience with non-EVM chains is a plus (open to discussion)
What We're Looking For
- Strong experience in Blockchain & Web3 development
- Proven ability to build production-ready dApps
- Proficiency in Next.js, React, and Node.js
- Experience designing and shipping MVPs
- Good communication and ability to work independently
Nice to Have
- Previous work on prediction markets, DeFi, or marketplaces
- Experience taking projects from prototype to launch
- Performance, security, and scalability mindset
How to Apply
Please include:
- A brief summary of your Web3 experience
- Links to previous dApps or blockchain projects
- Your preferred tech stack and availability
If you’re an expert in blockchain and Web3 and enjoy building real products from early prototypes, We’d love to hear from you.
Payment in Crypto
8,000-9,000
Monthly
See details

Looking for a blockchain developer

Whiteman Air Force Base, USA
Whiteman Air Force Base, USA
Full time
Remote
We are looking for a skilled Full-Stack Blockchain Developer to help maintain, improve, and extend the RaiseHive platform. This role involves working across the frontend, backend, and smart contract layers to ensure a stable, secure, and scalable Web3 application.
The ideal candidate has hands-on experience with React, Node.js, Ethereum smart contracts, and real-world Web3 integrations.
Framework: React 18.2 (Vite 3)
Styling: Tailwind CSS 3.4, NextUI
Animations: Framer Motion
Web3: Thirdweb SDK v4, Ethers.js v5
Routing: React Router DOM v6
State Management: React Context API
Libraries: React Markdown, React Image Gallery, Replyke (comments), React Toastify
Runtime: Node.js
Framework: Express.js
Database: MongoDB Atlas (Mongoose ODM)
Email: Nodemailer
Scheduling: Node-cron
Logging: Pino
Network: Ethereum
Smart Contracts: Solidity ^0.8.19
Development Tools: Hardhat
Libraries: OpenZeppelin, Thirdweb Contracts
Wallet Integration: MetaMask
Frontend
Strong proficiency in React (hooks, context, routing)
Experience with Vite or modern build tools
Solid knowledge of Tailwind CSS and responsive design
Experience using component libraries (NextUI, Material UI, etc.)
Backend
Strong experience with Node.js and Express
Proficiency with MongoDB and Mongoose
REST API design and implementation
Environment configuration and deployment awareness
Blockchain & Web3
Hands-on Ethereum development experience
Solidity smart contract development
Experience with Ethers.js / Thirdweb SDK
Understanding of smart contract security and gas optimization
MetaMask wallet integration and transaction handling
General
JavaScript (ES6+)
Git version control
Async programming and debugging skills
Strong problem-solving ability
Payment in Crypto
125
Monthly
See details

Senior iOS developer for GameDev startup

Full time
Remote
Game Concept: “Reflex Arena”
Genre
Real-time competitive 1v1 / 2v2 skill-based action game
Platform
iOS (iPhone first, iPad optional)
Core Idea
A pure skill game where players compete in short, intense arena matches using precision timing, reflexes, and positioning — no RNG, no pay-to-win.
Each match lasts 60–90 seconds, making it ideal for mobile sessions while supporting competitive depth.
Core Gameplay Loop
Matchmaking
Skill-based MMR
Ranked & unranked queues
Arena Match
Small symmetrical arena
Players control a single character
Objective: score points by outplaying, not overpowering
Score & Progress
Win → rank up
Lose → learn (clear replay & stats)
Cosmetics only progression
Controls (Mobile-First, High Precision)
Left thumb: Movement (virtual joystick)
Right thumb: Aim + action swipe
Tap: Ability activation
Perfect timing windows reward precision (parries, counters)
👉 Designed to feel closer to a fighting game than a casual mobile title.
Mechanics (Skill > Stats)
Core Mechanics
Dash with cooldown (positioning skill)
Timed parry (frame-perfect defense)
Charged shots (risk vs reward)
Combo chaining (execution mastery)
No Randomness
Fixed damage
Fixed cooldowns
No crit chance
No loot boxes
Competitive Depth
Skill Expression
Reaction time
Prediction & mind games
Spacing & arena control
Cooldown tracking
Skill Ceiling
Easy to learn (1 minute)
Hard to master (1000+ matches)
Game Modes
Ranked Duel (Main Mode)
1v1
Best of 3 rounds
Seasonal leaderboard
Team Arena
2v2 coordinated play
Shared objectives
Training / Practice
Frame timing visualizer
Ghost replays of top players
Visual Style
Clean, minimalistic sci-fi arenas
High contrast for readability
60–120 FPS target (ProMotion)
👉 Performance clarity > visual noise.
Monetization (Fair & Competitive)
Skins (characters, arenas, effects)
Emotes / victory poses
Battle pass (cosmetic only)
🚫 No power boosts
🚫 No energy timers
🚫 No loot RNG
Technical Design (iOS-Optimized)
Native Swift
Metal / SpriteKit
Deterministic simulation
Server-authoritative logic
Rollback netcode (if real-time PvP)
Payment in Crypto
7,500-8,750
Monthly
See details