Senior Scala Backend Engineer (f/m)
Status
Paris, France
Full time
Hybrid
Compensation is not specified
Role
Backend Engineer
Description
We are currently seeking talented individuals to join our team at Ledger, a global platform for digital assets and innovations in the Web3 space. Led by a team of over 500 professionals worldwide, Ledger is at the forefront of securing crypto assets through cutting-edge technology, with a mission to provide individuals and companies with secure solutions to manage their digital assets.
Ledger Live, our innovative Desktop and Mobile application built using ReactJS, aims to assist users in managing their blockchain-backed assets efficiently. Responsibilities for this position include working within Ledger's Consumer Services business unit to enhance existing transactional services and develop new solutions for consumers to facilitate the buying, selling, exchanging, and securing of crypto assets.
Your Role
- Develop and maintain high-performance microservices and APIs to support Ledger's product line, integrating with staking, DeFi services, and blockchain explorers.
- Contribute to designing and implementing scalable solutions, addressing technical challenges effectively.
- Ensure software quality through testing, performance optimization, and implementing monitoring and alerting systems.
- Improve and maintain CI/CD pipelines for secure and efficient deployment processes.
- Provide technical leadership and mentorship, collaborating with cross-functional teams to deliver impactful projects while upholding engineering standards.
- Drive innovation by identifying opportunities for improvement, sharing knowledge, and engaging in technical initiatives.
- Manage projects efficiently, meeting deadlines and deliverables.
Requirements
- Minimum of 6 years of engineering experience with a continuous learning mindset.
- At least 2 years of technical leadership experience, demonstrating effective communication and coordination to deliver critical products.
- Proficient in Scala with advanced expertise; additional mastery of a second backend language like Rust, Java, Python, or PHP is advantageous.
- Strong collaboration and communication skills.
- Experience working closely with QA, product management, and stakeholders to realize a shared vision.
- Prior experience in developing high-performance browser applications with a focus on architecture, infrastructure, and optimization.
- Proficiency in various web architecture patterns such as Microservices, Event-Driven, and P2P.
- Familiarity with adapting software engineering best practices to the work environment.
- Knowledge of the Web3 ecosystem and blockchain fundamentals is preferred.
- Experience with Docker, Kubernetes, web protocols (HTTP, JSON-RPC, GraphQL, SOAP, gRPC), and databases (relational and NoSQL).
- Fluent in English and experienced in a multicultural work environment.
- Background in supporting client-facing applications in a production environment.
Benefits
- Equity opportunities through stock options.
- Flexible hybrid work policy.
- Social events, annual company outings, and provided snacks and beverages.
- Comprehensive health insurance coverage.
- Personal development, coaching, and fitness partnerships.
- Generous paid leave, including national holidays and rest days.
- Access to high-performance office equipment.
- Transportation reimbursement and employee discounts on products.
Ledger is committed to being an equal opportunity employer, welcoming individuals from diverse backgrounds without discrimination based on gender, ethnicity, religion, sexual orientation, social status, disability, or age.
Skills Required
Ledger
Website
www.ledger.comCompany size
Not specified
Location
United States
Description
Not specified
Status
Zeljko Nemet
Business Development Lead — Web3 / DeFi (KOL & BDM Growth)
Full time
Remote
Business Development Lead — Web3 / DeFi (KOL & BDM Growth)
Remote | FBYT
We are building FBYT, a decentralized money management platform designed to redefine how capital is managed and deployed in Web3.
We are looking for a Business Development Lead to scale our growth engine by recruiting and managing a global network of Business Development Managers.
Role Overview
This is a strategic growth role focused on building and scaling a BD team.
You will be responsible for:
Sourcing and onboarding high-quality BDMs
Building a scalable partner acquisition engine
Ensuring BDMs are productive and aligned
Driving consistent KOL / Money Manager acquisition through your team
What You’ll Be Doing
Recruit and onboard BDMs globally
Train and guide BDMs on:
KOL acquisition
attracting and onboarding retail and institutional crypto managers
onboarding process
performance expectations
Monitor performance and optimize output
Build systems, playbooks, and processes for scaling BD
Act as a key driver of user and revenue growth
Compensation Structure
This role offers a competitive fixed salary + performance-based upside
Why This Role is Unique
Build and lead a global BD network
High ownership and strategic impact
Combination of:
leadership
recruiting
growth strategy
Strong upside tied to team performance
What We’re Looking For
Experience in:
Web3 / crypto / DeFi
Business Development or affiliate growth
Proven ability to:
recruit
build teams
scale partnerships
Strong network in:
KOL / trading / crypto communities
Highly organized and performance-driven
Ideal Candidate
Thinks in systems, not just individual deals
Knows how to scale people + processes
Motivated by building and leading a team
Join Us
If you want to build and scale a global BD operation in Web3 and be rewarded for real impact — we’d love to hear from you.
Telegram: @DT_7717
X: https://x.com/FBYTio
Remote | FBYT
We are building FBYT, a decentralized money management platform designed to redefine how capital is managed and deployed in Web3.
We are looking for a Business Development Lead to scale our growth engine by recruiting and managing a global network of Business Development Managers.
Role Overview
This is a strategic growth role focused on building and scaling a BD team.
You will be responsible for:
Sourcing and onboarding high-quality BDMs
Building a scalable partner acquisition engine
Ensuring BDMs are productive and aligned
Driving consistent KOL / Money Manager acquisition through your team
What You’ll Be Doing
Recruit and onboard BDMs globally
Train and guide BDMs on:
KOL acquisition
attracting and onboarding retail and institutional crypto managers
onboarding process
performance expectations
Monitor performance and optimize output
Build systems, playbooks, and processes for scaling BD
Act as a key driver of user and revenue growth
Compensation Structure
This role offers a competitive fixed salary + performance-based upside
Why This Role is Unique
Build and lead a global BD network
High ownership and strategic impact
Combination of:
leadership
recruiting
growth strategy
Strong upside tied to team performance
What We’re Looking For
Experience in:
Web3 / crypto / DeFi
Business Development or affiliate growth
Proven ability to:
recruit
build teams
scale partnerships
Strong network in:
KOL / trading / crypto communities
Highly organized and performance-driven
Ideal Candidate
Thinks in systems, not just individual deals
Knows how to scale people + processes
Motivated by building and leading a team
Join Us
If you want to build and scale a global BD operation in Web3 and be rewarded for real impact — we’d love to hear from you.
Telegram: @DT_7717
X: https://x.com/FBYTio
TA Quant
Quantitative Developer
Full time
Remote
We're looking for a Quant Developer to sit at the intersection of software engineering and quantitative finance, bridging the gap between research and production. You'll be building the infrastructure that our trading strategies actually run on, including backtesting frameworks, simulation environments, execution systems, and the tooling that lets researchers move from idea to live deployment quickly and with confidence.This role demands both depth and range. You need to write clean, performant, production-ready code, and you need to understand the financial logic behind what you're building well enough to catch problems before they hit live markets. You'll work closely with our quant research team to translate complex mathematical models into reliable systems that execute in real time with minimal latency. If you're the kind of person who takes equal pride in elegant code and sound market intuition, this is built for you.
Responsibilities
Design and develop backtesting frameworks, research tooling, and simulation environments for quant strategy development
Implement and maintain trading algorithms and execution systems across live crypto markets
Optimize code for performance and low latency across the full research-to-production pipeline
Collaborate directly with quantitative researchers to productionize strategies and ensure research assumptions hold in production
Build and maintain data pipelines for market data ingestion, processing, and storage
Monitor and improve live system reliability, catching and resolving issues before they affect trading outcomes
Requirements
Bachelor's degree or equivalent in Computer Science, Mathematics, Physics, or a related quantitative field
3+ years of professional software engineering experience with a focus on performance-critical or financial systems
Strong proficiency in Python as a primary language, with working knowledge of C++ or another compiled language preferred
Solid understanding of financial markets, trading concepts, and quantitative methods including time-series analysis and statistical modeling
Experience building or working with backtesting engines, execution frameworks, or real-time data systems
Ability to read and reason about mathematical models and translate them into reliable, testable code
Responsibilities
Design and develop backtesting frameworks, research tooling, and simulation environments for quant strategy development
Implement and maintain trading algorithms and execution systems across live crypto markets
Optimize code for performance and low latency across the full research-to-production pipeline
Collaborate directly with quantitative researchers to productionize strategies and ensure research assumptions hold in production
Build and maintain data pipelines for market data ingestion, processing, and storage
Monitor and improve live system reliability, catching and resolving issues before they affect trading outcomes
Requirements
Bachelor's degree or equivalent in Computer Science, Mathematics, Physics, or a related quantitative field
3+ years of professional software engineering experience with a focus on performance-critical or financial systems
Strong proficiency in Python as a primary language, with working knowledge of C++ or another compiled language preferred
Solid understanding of financial markets, trading concepts, and quantitative methods including time-series analysis and statistical modeling
Experience building or working with backtesting engines, execution frameworks, or real-time data systems
Ability to read and reason about mathematical models and translate them into reliable, testable code
Payment in Crypto
TA Quant
Quantitative Researcher
Full time
Remote
We're looking for a Quant Researcher to join us remotely and take direct ownership of the research lifecycle, from raw data exploration all the way through to live strategy deployment. You'll work closely with our trading and engineering teams to develop, test, and continuously refine the models and algorithms that drive real P&L outcomes across crypto markets. This is a high-ownership role with meaningful exposure to live markets from day one. You won't be running support research in the background, you'll be a core contributor shaping the strategies we actually trade. That means working with large and often unconventional datasets, identifying exploitable statistical patterns in volatile and illiquid market conditions, and translating rigorous mathematical research into production-ready code that performs when it counts.
Responsibilities
Develop, backtest, and continuously improve quantitative trading models and algorithms, translating mathematical insights into production-ready code
Collaborate with trading and development teams to refine existing strategies and build new ones with a direct focus on P&L impact
Work through large and complex datasets to identify patterns, validate hypotheses, and stress-test models against real market conditions
Conceptualize valuation frameworks, improve mathematical models, and maintain strategy performance in live environments
Conduct ongoing statistical research into crypto market microstructure and price dynamics using both conventional and unconventional data sources
Requirements
Advanced degree in mathematics, statistics, physics, computer science, or a related quantitative field
Strong proficiency in probability and statistics, including time-series analysis, machine learning, and pattern recognition applied to financial data
Hands-on programming experience in Python, with familiarity in R or MATLAB and ideally some exposure to compiled languages like C++
Prior experience in crypto markets, digital asset trading, or algorithmic finance
Proven ability to work in a data-driven research environment with minimal direction
Rigorous, evidence-based approach to problem-solving with the ability to move quickly from hypothesis to testable implementation
Responsibilities
Develop, backtest, and continuously improve quantitative trading models and algorithms, translating mathematical insights into production-ready code
Collaborate with trading and development teams to refine existing strategies and build new ones with a direct focus on P&L impact
Work through large and complex datasets to identify patterns, validate hypotheses, and stress-test models against real market conditions
Conceptualize valuation frameworks, improve mathematical models, and maintain strategy performance in live environments
Conduct ongoing statistical research into crypto market microstructure and price dynamics using both conventional and unconventional data sources
Requirements
Advanced degree in mathematics, statistics, physics, computer science, or a related quantitative field
Strong proficiency in probability and statistics, including time-series analysis, machine learning, and pattern recognition applied to financial data
Hands-on programming experience in Python, with familiarity in R or MATLAB and ideally some exposure to compiled languages like C++
Prior experience in crypto markets, digital asset trading, or algorithmic finance
Proven ability to work in a data-driven research environment with minimal direction
Rigorous, evidence-based approach to problem-solving with the ability to move quickly from hypothesis to testable implementation
Payment in Crypto
Yulia Zarubina
Marketing Performance Manager
Tbilisi, Georgia
Tbilisi, Georgia
Full time
Office
Marketing Performance Manager — Elements of a Soul
Location: Tbilisi, Georgia
Format: On-site · Full-time
Elements of a Soul (EOAS) is a Web3 MMORPG set in 2137, combining open-world gameplay, real Bitcoin mining integration, and an NFT-driven player economy.
We are looking for a Marketing Performance Manager to turn marketing performance data into clear growth decisions.
Key Responsibilities
Lead performance analytics and reporting
Set up tracking, build dashboards, define KPIs per KOL, cohort, channel, and campaign, manage UTM and on-chain attribution, run A/B tests, and translate data into actionable growth decisions.
Optimize campaign performance
Track paid, token-based, and performance-based partnerships, evaluate ROI, identify growth opportunities, and improve conversion from community attention to measurable results.
Support Web3 growth strategy
Contribute to campaign planning around NFT mints, token-related activations, whitelist campaigns, community growth, and player acquisition.
Requirements
Crypto/Web3 experience is a hard requirement
You have personally worked on or launched projects involving token launches, NFT mints, on-chain economies, Web3 communities, or crypto-native growth campaigns.
Deep Web3 fluency
You understand NFTs, tokens, tokenomics, P2E models, DAOs, crypto community behavior, and what drives trust, hype, engagement, and conversion in Web3 audiences.
Strong performance marketing background
3+ years of experience in performance marketing, ideally with proven results in crypto/Web3, community acquisition, or growth experiments.
Analytics-driven mindset
Analytics is part of your daily workflow. You are confident with platform analytics, Google Analytics, spreadsheets, A/B testing, campaign reporting, and performance optimization.
Nice to Have
These are not hard requirements, but they will make a candidate especially strong for this role:
Hands-on experience with NFT mints, OpenSea campaigns, token launches, tokenomics-based activations, or whitelist campaigns
Experience with crypto-native analytics tools such as Dune, Nansen, DappRadar, or similar platforms
Basic SQL or Dune query skills
Experience with automation tools such as n8n, Zapier, Make, CRM systems, or campaign tracking workflows
Experience in running KOL’s & Ambassador campaigns
Gaming, Crypto, GameFi, or player community growth experience
What We Offer
Competitive compensation
Direct collaboration with the founders
Freedom to build the marketing performance function from scratch
Career growth path
On-site work in Tbilisi with the core team
How to Apply
Please send:
CV (Marketing/Growth Portfolio would be an advantage)
Links to crypto/Web3 projects you have worked on, including your specific role and impact
An analytics, dashboard, reporting, or A/B test case study
Examples of KOL, ambassador, creator, or community growth campaigns with results (nice to have)
A short note on why EOAS interests you
Apply via: yulia@elementsofasoul.com
Location: Tbilisi, Georgia
Format: On-site · Full-time
Elements of a Soul (EOAS) is a Web3 MMORPG set in 2137, combining open-world gameplay, real Bitcoin mining integration, and an NFT-driven player economy.
We are looking for a Marketing Performance Manager to turn marketing performance data into clear growth decisions.
Key Responsibilities
Lead performance analytics and reporting
Set up tracking, build dashboards, define KPIs per KOL, cohort, channel, and campaign, manage UTM and on-chain attribution, run A/B tests, and translate data into actionable growth decisions.
Optimize campaign performance
Track paid, token-based, and performance-based partnerships, evaluate ROI, identify growth opportunities, and improve conversion from community attention to measurable results.
Support Web3 growth strategy
Contribute to campaign planning around NFT mints, token-related activations, whitelist campaigns, community growth, and player acquisition.
Requirements
Crypto/Web3 experience is a hard requirement
You have personally worked on or launched projects involving token launches, NFT mints, on-chain economies, Web3 communities, or crypto-native growth campaigns.
Deep Web3 fluency
You understand NFTs, tokens, tokenomics, P2E models, DAOs, crypto community behavior, and what drives trust, hype, engagement, and conversion in Web3 audiences.
Strong performance marketing background
3+ years of experience in performance marketing, ideally with proven results in crypto/Web3, community acquisition, or growth experiments.
Analytics-driven mindset
Analytics is part of your daily workflow. You are confident with platform analytics, Google Analytics, spreadsheets, A/B testing, campaign reporting, and performance optimization.
Nice to Have
These are not hard requirements, but they will make a candidate especially strong for this role:
Hands-on experience with NFT mints, OpenSea campaigns, token launches, tokenomics-based activations, or whitelist campaigns
Experience with crypto-native analytics tools such as Dune, Nansen, DappRadar, or similar platforms
Basic SQL or Dune query skills
Experience with automation tools such as n8n, Zapier, Make, CRM systems, or campaign tracking workflows
Experience in running KOL’s & Ambassador campaigns
Gaming, Crypto, GameFi, or player community growth experience
What We Offer
Competitive compensation
Direct collaboration with the founders
Freedom to build the marketing performance function from scratch
Career growth path
On-site work in Tbilisi with the core team
How to Apply
Please send:
CV (Marketing/Growth Portfolio would be an advantage)
Links to crypto/Web3 projects you have worked on, including your specific role and impact
An analytics, dashboard, reporting, or A/B test case study
Examples of KOL, ambassador, creator, or community growth campaigns with results (nice to have)
A short note on why EOAS interests you
Apply via: yulia@elementsofasoul.com
EasyBit
Support Agent
Part time
Remote
We are looking for a Support Agent to join our team at EasyBit. The ideal candidate should have a strong understanding of cryptocurrency and blockchain fundamentals, along with excellent communication skills in both English and Russian. In this role, you will be responsible for monitoring support systems, responding to client inquiries, resolving issues related to orders via our internal dashboard, and escalating complex cases to the appropriate team when necessary.
We are particularly interested in candidates with prior experience in customer support or the crypto industry, as this will be considered a strong advantage, proficiency in additional languages (such as Russian) will also be considered an advantage.. If you are proactive, detail-oriented, and comfortable working in a fast-paced environment, we would love to hear from you.
We are particularly interested in candidates with prior experience in customer support or the crypto industry, as this will be considered a strong advantage, proficiency in additional languages (such as Russian) will also be considered an advantage.. If you are proactive, detail-oriented, and comfortable working in a fast-paced environment, we would love to hear from you.