Scala Backend Engineer - Internship
Status
Paris, France
Full time
Hybrid
Compensation is not specified
Role
Backend Engineer
Description
We are dedicated to making digital assets accessible and secure for all individuals worldwide. If you are passionate about this mission, come and join us at our comprehensive platform for digital assets and Web3.
Ledger, established in 2014, is the global leader in securing more than 15% of the world's crypto assets through our innovative Ledger Nanos. With a team of over 600 professionals across various global locations, we develop products and services to facilitate the secure buying, storing, swapping, growing, and managing of crypto assets.
Our company values of Pragmatism, Audacity, Commitment, Trust, and Transparency guide us as we have successfully sold over 5 million units of Ledger hardware wallets in 180 countries. Join our backend blockchain team working on building and maintaining robust Ledger blockchain infrastructure, core transactional data services, and indexing layers.
Within the team of passionate Engineers, we advocate for functional programming to deliver scalable platforms and APIs while aligning with product and business requirements. We actively engage in knowledge-sharing sessions and community involvement to stay at the forefront of technological advancements.
Proficiency in Scala for developing backend services is advantageous, but we are open to providing training if you are unfamiliar. As part of the team, you will have the opportunity to participate in various industry events, contribute to open source projects, and enhance your skills regularly.
Deliverables:
- Develop a leader / follower clustering framework using Scala
- Utilize Kubernetes leases for cloud-native elections
- Ensure the delivery of high-quality software through testing, documentation, and demonstration
- Identify bottlenecks and optimize performance through benchmarks
- Implement introspectability with web UI and metric publication
Requirements:
- Strong knowledge of Linux operating systems
- Ability to adapt and collaborate effectively in a dynamic environment
- Experience with continuous integration/deployment practices
- Proficiency in Containerization and Cloud deployments
- Interest in cryptocurrencies and blockchain technology is a bonus
- Enthusiasm for teamwork, learning, and sharing knowledge
Benefits:
- Flexibility with a hybrid work policy
- Engaging in frequent social events
- Access to high-performance office devices and gadgets
- Reimbursement for 75% of transportation costs
- Lunch vouchers provided
- Time off benefits
We are committed to promoting diversity and provide equal opportunities for all candidates regardless of 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
The Hive
AI Engineer (LLMs, DeFi agents)
London, UK
London, UK
Full time
Remote
Why The Hive will keep you awake at night
We’re the Solana AI-Hackathon champions turning abstract DeFi into voice-controlled reality. Your code becomes an intelligent agent that re-balances thousands of wallets while you sleep—and you share in the upside.
What you’ll build
Design LLM-based Solana agents that auto-stake, auto-vote and auto-farm across Jito, Kamino, Marinade and Meteora.
Hook those agents into Telegram, Farcaster and a web console so our users can say “farm mSOL at 8%+ APY” and watch it happen on-chain.
Train reasoning loops on real market data; benchmark them live against your own degenerate trading strategies (yes, you can show off).
Who you are
You personally trade or LP on Solana (send us a public wallet—seriously).
3+ years Python/Rust + production LLM or LangChain work.
You’ve deployed at least one bot that executed >10k on-chain txns or managed >$1 M in TVL.
Nice-to-haves – Serum, Drift, or Tensor market-making scripts; contributor to Solana open-source repos.
Comp & Perks – USDC + BUZZ tokens, gas reimbursed devnet sandbox, bi-monthly hack weeks in Lisbon or NYC.
We’re the Solana AI-Hackathon champions turning abstract DeFi into voice-controlled reality. Your code becomes an intelligent agent that re-balances thousands of wallets while you sleep—and you share in the upside.
What you’ll build
Design LLM-based Solana agents that auto-stake, auto-vote and auto-farm across Jito, Kamino, Marinade and Meteora.
Hook those agents into Telegram, Farcaster and a web console so our users can say “farm mSOL at 8%+ APY” and watch it happen on-chain.
Train reasoning loops on real market data; benchmark them live against your own degenerate trading strategies (yes, you can show off).
Who you are
You personally trade or LP on Solana (send us a public wallet—seriously).
3+ years Python/Rust + production LLM or LangChain work.
You’ve deployed at least one bot that executed >10k on-chain txns or managed >$1 M in TVL.
Nice-to-haves – Serum, Drift, or Tensor market-making scripts; contributor to Solana open-source repos.
Comp & Perks – USDC + BUZZ tokens, gas reimbursed devnet sandbox, bi-monthly hack weeks in Lisbon or NYC.
Payment in Crypto
bitcastle .
Listing Business Development Manager (Crypto, Japanese Speaking)
Delhi, India
Delhi, India
Full time
Remote
About the Company:
Bitcastle is a cryptocurrency exchange platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-Time Listing Business Development to drive growth by leading end-to-end sales initiatives and strategic collaborations in the blockchain and crypto sector, while coordinating cross-functional teams and staying ahead of market trends through continuous research and industry engagement.
About the Role:
- Identify new business opportunities, expand and execute strategic partnerships
- Look for new listing sales opportunities in Blockchain and crypto space
- Manage the listing sales pipeline, from researching, sourcing, contacting, negotiating, converting and following up with clients
- Liase and coordinate with marketing, product, customer support and operations teams to ensure smooth delivery of products
- Assess and monitor key indicators of cryptocurrency projects and evaluating the effectiveness of partnership and campaign initiatives
- Monitor market trends and conducting R&D in the cryptocurrency market
- Participate in overseas exhibitions and events as required and network with potential business partners
Requirements:
Business level Japanese proficiency
Minimum 1 year of BD/sales experience in crypto/blockchain space
Familiar with cryptocurrency or blockchain technology
Experience in managing a team
Experience in crypto coins listing or general business development experience in the crypto industry
Capabilities of develop global customer relationships independently
Good relationship with team and cross functional communication skill
Ideal Candidate:
Have a good sense of cooperation and working with a team
Able to act independently and proactively
Experience in customer negotiation
Bitcastle is a cryptocurrency exchange platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-Time Listing Business Development to drive growth by leading end-to-end sales initiatives and strategic collaborations in the blockchain and crypto sector, while coordinating cross-functional teams and staying ahead of market trends through continuous research and industry engagement.
About the Role:
- Identify new business opportunities, expand and execute strategic partnerships
- Look for new listing sales opportunities in Blockchain and crypto space
- Manage the listing sales pipeline, from researching, sourcing, contacting, negotiating, converting and following up with clients
- Liase and coordinate with marketing, product, customer support and operations teams to ensure smooth delivery of products
- Assess and monitor key indicators of cryptocurrency projects and evaluating the effectiveness of partnership and campaign initiatives
- Monitor market trends and conducting R&D in the cryptocurrency market
- Participate in overseas exhibitions and events as required and network with potential business partners
Requirements:
Business level Japanese proficiency
Minimum 1 year of BD/sales experience in crypto/blockchain space
Familiar with cryptocurrency or blockchain technology
Experience in managing a team
Experience in crypto coins listing or general business development experience in the crypto industry
Capabilities of develop global customer relationships independently
Good relationship with team and cross functional communication skill
Ideal Candidate:
Have a good sense of cooperation and working with a team
Able to act independently and proactively
Experience in customer negotiation
bitcastle .
Listing Business Development
City Of Manila, Philippines
City Of Manila, Philippines
Full time
Remote
About the Company:
Bitcastle is a cryptocurrency exchange platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-Time Listing Business Development to drive growth by leading end-to-end sales initiatives and strategic collaborations in the blockchain and crypto sector, while coordinating cross-functional teams and staying ahead of market trends through continuous research and industry engagement.
About the Role:
- Identify new business opportunities, expand and execute strategic partnerships
- Look for new listing sales opportunities in Blockchain and crypto space
- Manage the listing sales pipeline, from researching, sourcing, contacting, negotiating, converting and following up with clients
- Liase and coordinate with marketing, product, customer support and operations teams to ensure smooth delivery of products
- Assess and monitor key indicators of cryptocurrency projects and evaluating the effectiveness of partnership and campaign initiatives
- Monitor market trends and conducting R&D in the cryptocurrency market
- Participate in overseas exhibitions and events as required and network with potential business partners
Requirements:
- Business level English
- Minimum 1 year of BD/sales experience in crypto/blockchain space
- Familiar with cryptocurrency or blockchain technology
- Capabilities of develop global customer relationships independently
- Good relationship with team and cross functional communication skill
- Fast learner, hard worker and team player
Ideal Candidate:
- Have a good sense of cooperation and working with a team
-Able to act independently and proactively
- Experience in customer negotiation
- Business level Japanese
Bitcastle is a cryptocurrency exchange platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-Time Listing Business Development to drive growth by leading end-to-end sales initiatives and strategic collaborations in the blockchain and crypto sector, while coordinating cross-functional teams and staying ahead of market trends through continuous research and industry engagement.
About the Role:
- Identify new business opportunities, expand and execute strategic partnerships
- Look for new listing sales opportunities in Blockchain and crypto space
- Manage the listing sales pipeline, from researching, sourcing, contacting, negotiating, converting and following up with clients
- Liase and coordinate with marketing, product, customer support and operations teams to ensure smooth delivery of products
- Assess and monitor key indicators of cryptocurrency projects and evaluating the effectiveness of partnership and campaign initiatives
- Monitor market trends and conducting R&D in the cryptocurrency market
- Participate in overseas exhibitions and events as required and network with potential business partners
Requirements:
- Business level English
- Minimum 1 year of BD/sales experience in crypto/blockchain space
- Familiar with cryptocurrency or blockchain technology
- Capabilities of develop global customer relationships independently
- Good relationship with team and cross functional communication skill
- Fast learner, hard worker and team player
Ideal Candidate:
- Have a good sense of cooperation and working with a team
-Able to act independently and proactively
- Experience in customer negotiation
- Business level Japanese
bitcastle .
Chief Technology Officer (Japanese Speaking)
Singapore
Singapore
Full time
Remote
Job description:
Bitcastle is a cryptocurrency exchange platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-Time Japanese speaking Chief Technology Officer to lead our engineering team.As frequent communication with Japan and Vietnam entities is required, this role will require Japanese language proficiency and will be fully remote at the moment.
– Formulate strategy and establish the technical vision for the business
– Preparation of specifications and design documents for product development
– Project management of the development process, including quality control
– Define and refine engineering workflows, tech architecture and infrastructure
– Build, develop, lead a world class engineering team
Requirements:
– Experience as a CTO or in a similar technology leadership role in cryptocurrency exchanges or brokerage firms.
– Strong leadership capabilities – with proven success of building, developing and leading an engineering team
– Experience in development using Python, PHP and NodeJS
– Project management experience
– Business level English
– Business level Japanese language skills (JLPT N2 and above) to communicate with Japan and Vietnam entity without need for translator
Ideal Candidate:
– Has project management experience
– Has experience as CTO or similar role in a startup
– Knowledge and interest in cryptocurrency
Project Frameworks and Languages:
– Backend: nestJS(Node JS), Laravel (PHP),Python
– Database: Redis, My SQL
– Frontend: Vue JS
– Mobile: React Native, Android Native, Swift
– DevOps: Git, CI/CD, Docker, Jenkins, GitLabCD
– Cloud: AWS
Bitcastle is a cryptocurrency exchange platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-Time Japanese speaking Chief Technology Officer to lead our engineering team.As frequent communication with Japan and Vietnam entities is required, this role will require Japanese language proficiency and will be fully remote at the moment.
– Formulate strategy and establish the technical vision for the business
– Preparation of specifications and design documents for product development
– Project management of the development process, including quality control
– Define and refine engineering workflows, tech architecture and infrastructure
– Build, develop, lead a world class engineering team
Requirements:
– Experience as a CTO or in a similar technology leadership role in cryptocurrency exchanges or brokerage firms.
– Strong leadership capabilities – with proven success of building, developing and leading an engineering team
– Experience in development using Python, PHP and NodeJS
– Project management experience
– Business level English
– Business level Japanese language skills (JLPT N2 and above) to communicate with Japan and Vietnam entity without need for translator
Ideal Candidate:
– Has project management experience
– Has experience as CTO or similar role in a startup
– Knowledge and interest in cryptocurrency
Project Frameworks and Languages:
– Backend: nestJS(Node JS), Laravel (PHP),Python
– Database: Redis, My SQL
– Frontend: Vue JS
– Mobile: React Native, Android Native, Swift
– DevOps: Git, CI/CD, Docker, Jenkins, GitLabCD
– Cloud: AWS
Doris Tang
Korean Growth Lead
Full time
Remote
Roles & ResponsibilitiesSynFutures is looking to hire a Korea Growth Lead assisting the management of local communities. Responsibilities include:Foster strategic partnerships on a regional scale, with a particular emphasis on marketing partners, key opinion leaders (KOLs), media networks, and web3 ecosystem projects. Continuously analyze performance and provide valuable feedback to enhance collaborative efforts.Proactively expand the user base, token holders, and communities prioritizing localized growth.Strategize and execute marketing schedules and events, meticulously measuring their effectiveness and return on investment (ROI).Develop and manage online community channels to facilitate effective communication and engagement.Solicit user and community feedback, acting as a liaison between the product manager, tech team, and community to drive continuous product improvements.RequirementsBachelor degree or above.At least 2-3 years experience in blockchain, cryptocurrency, or financial services, with a focus in marketing or business development.Language: Native Korean + English proficiency preferred. Other languages like Mandarin and Japanese are a plus.Passionate about blockchain and DeFi. Independently minded and self-motivated. For more details, please read: https://synfutures.notion.site/korea-growth-lead