Data Engineer (Middle+/Senior)
Are you passionate about blockchain technology and working with data? Do you enjoy taking ideas from early-stage concepts through to useful insights? If so, this could be a fantastic opportunity to be a hands-on engineer shaping the future blockchain data analysis! Now more than ever, we need a team of diverse, passionate and hungry individuals to drive our group vision forward, one block at a time. We need people like YOU, to be a part of our on-chain analysis revolution! As a Data Engineer you will be closely collaborating with both business and backend to design and implement an efficient way of data processing. You will be working in our back end team and will have plenty of opportunities to improve your skills and grow professionally.
Responsibilities: You'll be working on the pipeline of our core product.
This includes:
— Designing and developing blockchain data processing pipelines for new charts, including development and optimizing of the data architecture; — Integrating developments into existing solutions; — Development and maintenance of infrastructure required for optimal extraction, transformation and loading of data from various sources; — Participating in grooming solutions for data processing, ETL/ELT processes and automation of data processing workflows, including coordination with backend developers, DS, DA and QA engineers; — Data validation: counting historical data with BlockSci, automating data validation.
Requirements: — 3+ years of work experience; — Solid knowledge of Python and SQL; — Experience working with Databases (e.g. PostgreSQL, Vertica); — Knowledge of ETL tools (e.g. Spark, Airflow).
Nice to have:
— Experience within the cryptocurrency industry; — Experience with CI / CD (Gitlab CI, Docker, K8s); — Experience with administration of AWS.
Benefits:
— Competitive salary; — Ability to work from our offices in London, or fully remote; — Flexible workday - you choose when you work; — 30 days holiday allowance per year; — Monthly contribution towards your gym membership; — $500 per year towards a personal development fund.
Digital Marketing Specialist Wanted
Location: Remote
Employment Type: Full-Time or Part-Time (Flexible)
About Us
We are an emerging iGaming company focused on the Latin American market. We are seeking an experienced Digital Marketing Specialist who is fluent in both English and Spanish to help build brand awareness, acquire new customers, and support our continued growth.
Key Responsibilities
Develop and execute digital marketing campaigns across multiple channels, including Facebook, Instagram, TikTok, Telegram, X (Twitter), YouTube, and other relevant platforms.
Create, translate, and optimize marketing content in both English and Spanish.
Manage social media accounts and maintain consistent brand messaging.
Identify new customer acquisition opportunities and growth channels.
Coordinate promotional campaigns, bonuses, tournaments, and special events.
Work with influencers, affiliates, and online communities to increase brand awareness.
Monitor campaign performance and provide regular reports on KPIs, conversions, and ROI.
Conduct competitor analysis and identify emerging market trends within the iGaming industry.
Assist with CRM, email marketing, push notifications, and player retention campaigns.
Collaborate with designers and content creators to develop high-performing marketing materials.
Requirements
Fluent written and spoken English and Spanish.
Minimum 2 years of experience in Digital Marketing, Performance Marketing, Social Media Marketing, Affiliate Marketing, or a related field.
Strong understanding of Meta Ads, Google Ads, TikTok Ads, and other digital advertising platforms.
Experience managing social media communities and online engagement.
Excellent copywriting and communication skills.
Ability to work independently and manage multiple projects simultaneously.
Strong analytical skills and familiarity with marketing analytics tools.
Preferred Qualifications
Previous experience in iGaming, crypto, fintech, or related industries.
Experience working with affiliate marketers and influencers.
Knowledge of Latin American markets, particularly Peru, Mexico, Colombia, Chile, and Argentina.
Experience with CRM platforms, email marketing, and player retention strategies.
Familiarity with SEO, content marketing, and conversion optimization.
What We Offer
Competitive salary based on experience.
Performance-based bonuses and incentives.
Fully remote work environment.
Flexible working hours.
Opportunity to work with a rapidly growing international iGaming company.
Career growth opportunities within the company.
To Apply
Please send your CV, portfolio, and a brief introduction outlining your experience in digital marketing and Spanish-language markets.
Backend Engineer with hands-on blockchain experience
Senior Blockchain Developer based Next.js+Rust
Requirements:
5+ years of software development experience
Strong experience with Next.js and Rust
Experience building blockchain/Web3 applications
Solid understanding of smart contracts, blockchain protocols, or cryptography
Excellent problem-solving and communication skills
Location: United States (preferred)
Salary: $80,000–$100,000/year (depending on experience)
If you're passionate about building scalable blockchain applications, we'd love to hear from you.
📩 If you're interested, please apply through LaborX with your profile, resume, GitHub, and any relevant project links.
ZK-Infrastructure Engineer
Expectations:
Design and implement circuits for merkle membership and signature aggregation
Optimize witness generation and prover memory usage
Build a distributed prover system with load balancing
Reduce proving time from 30s to <5s using GPU acceleration
Collaborate with researchers on new polynomial commitment schemes
Write performance benchmarks and regression tests
Deploy provers as microservices on Kubernetes
Maintain a devnet for testing with real transaction data
Contribute to open-source ZK libraries (e.g., gnark, arkworks)
Nice to have:
Experience with MPC (multi-party computation)
Knowledge of TLSNotary or ZKEmail
Published papers or talks at ZK conferences
Chinese+English language proficiency
Senior Blockchain Engineer (Cosmos SDK & IBC)
Expectations:
Design custom modules (x/staking, x/rewards, x/merkl)
Implement IBC light clients and relayers
Optimize block time and state pruning
Write comprehensive unit & integration tests (Go test)
Build CLI tools for validators and delegators
Monitor node health and network upgrades
Collaborate with the research team on MEV-resistant ordering
Maintain chain upgrades (v1 → v2) with migration scripts
Write technical documentation for external validators
Nice to have:
Experience with Avalanche Subnets or Polkadot Substrate
Knowledge of HSM and key management
Open-source contributions to Cosmos SDK or related repos
Chinese+English language proficiency