[Hiring] Team Lead @Xsolla

Role Description

We are looking for a Team Lead who is passionate about building and leading teams that create cutting-edge blockchain infrastructure to join our Xsolla ZK team . The best candidate will be someone who thrives in a fast-paced, highly collaborative, and exceptionally dynamic setting and is excited to lead a team of backend engineers developing Web3 products while maintaining hands-on technical contribution.

Strong backend development expertise in Go combined with leadership skills are essential, along with experience in building high-load distributed systems and managing engineering teams. The ability to balance technical excellence with people development and delivery predictability will be key to your success in this role.

If you're passionate about growing engineering talent while shipping world-class blockchain products and love shaping the technical direction of next-generation gaming infrastructure, we would love to hear from you!

About the project: Xsolla ZK is building a cross-game infrastructure that empowers gamers to freely trade and use their digital assets without barriers. As a Team Lead, you'll lead a team working on:

• Xsolla Bazaar — NFT marketplace backend for trading digital assets across multiple blockchains
• Web3 Backpack — Smart wallet backend with ZK SSO 4337 account abstraction
• Blockchain Services — Event scanners, transaction processors, indexers
• Web3 APIs — Developer-facing APIs and SDKs for game integration

Tech Stack:

• Language: Go (go-ethereum, ethkit; idiomatic concurrency, performance profiling)
• Databases: MongoDB, PostgreSQL, Redis
• Message Queue: NATS, RabbitMQ, Kafka
• API: REST, WebSocket, gRPC, OpenAPI (Swagger)
• Account Abstraction (ERC-4337): EntryPoint (v0.6–v0.8), UserOperation lifecycle, bundler/paymaster roles, validation rules (ERC-7562), signature validation for undeployed accounts (ERC-6492)
• Smart Account Standards: Modular account standards (ERC-7579 / ERC-6900), session keys and delegated permissions (ERC-7710 / ERC-7715), EIP-7702 EOA delegation awareness
• Signature & Wallet-Facing Standards: EIP-712 typed data, ERC-1271 contract signatures, WebAuthn/passkey (P-256), EIP-1193, EIP-6963, EIP-5792, ERC-7677 paymaster interfaces
• ZK Stack / ZKsync Era: EraVM, system contracts (ContractDeployer, NonceHolder), bootloader, zksolc/zkvyper compilers, native Account Abstraction, L1↔L2 messaging and finality
• Ethereum L1: go-ethereum, abigen, RPC and indexer semantics
• Smart Contracts: Solidity, ERC-20/721/1155, upgradeability and migration patterns
• Custody: Key management fundamentals (HSM, MPC/threshold signing) relevant to backend wallet operations
• Infrastructure: Docker, Kubernetes, GitLab CI/CD, Graylog, Prometheus

Team Scope:

• Team of up to 8 backend engineers
• Ownership of one or more service domains within the Web3 ecosystem
• Direct collaboration with Product, Frontend, Blockchain/Solidity, and DevOps teams

Responsibilities

• Technical Leadership (60%):
  • Architect Web3 backend systems leveraging ZK Stack infrastructure and ERC-4337 Account Abstraction primitives
  • Define technical strategy for the UserOperation lifecycle: bundler/paymaster integration, gas-sponsorship strategy
  • Lead ZK Stack / ZKsync Era integration decisions
  • Design session-key and permission primitives
  • Own the signing and confirmation flow
  • Oversee smart contract interaction layer
  • Review complex code focusing on blockchain-specific edge cases
  • Identify systemic risks and lead initiatives to resolve them
  • Drive improvements in blockchain observability
  • Maintain hands-on contribution to critical features involving multi-chain operations
• People Management (40%):
  • Lead and mentor a team of up to 8 backend engineers
  • Conduct regular 1:1s, performance reviews, and career development conversations
  • Hire and onboard new team members
  • Foster a culture of technical excellence, collaboration, and continuous learning
  • Manage team workload and ensure sustainable delivery pace
• Delivery & Process:
  • Own team's delivery predictability and sprint commitments
  • Collaborate with Product to refine requirements and estimate work
  • Report on team progress, risks, and blockers to stakeholders
  • Continuously improve development processes and team efficiency

Qualifications

• 5+ years of commercial experience with Go (or 7+ years with other backend languages with Go proficiency)
• Strong expertise in distributed systems and microservices architecture
• Deep knowledge of MongoDB, PostgreSQL, and Redis
• Experience with message queues (NATS, RabbitMQ, Kafka)
• Solid understanding of API design (REST, WebSocket, gRPC)
• Experience with Docker, Kubernetes, and CI/CD pipelines
• Blockchain development experience: Ethereum/EVM smart contract interaction
• Understanding of transaction lifecycle, gas models, nonce management
• Experience with token standards (ERC-20, ERC-721, ERC-1155)
• Working knowledge of ERC-4337 Account Abstraction
• 2+ years of experience leading engineering teams
• Track record of mentoring and developing engineers
• Experience with agile methodologies and sprint planning
• Strong communication skills for technical and non-technical stakeholders
• Ability to balance hands-on coding with management responsibilities

Nice to Have

• Experience with ZK Stack / ZKsync Era
• System contracts (ContractDeployer, NonceHolder, etc.)
• L1↔L2 communication, bridging, and finality/reorg behavior
• Deeper Account Abstraction & smart wallet exposure
• Familiarity with AA infrastructure providers
• Exposure to key management
• Knowledge of smart contract development and wallet threat modeling
• Experience with blockchain event processing
• Background in gaming or fintech industries with high-load systems
• Experience with remote team management

What Success Looks Like

• First 3 months:
  • Onboard and understand the codebase, architecture, and team dynamics
  • Establish regular 1:1s and team rituals
  • Deliver at least one significant feature or improvement
• First 6 months:
  • Improve team's delivery predictability and code quality metrics
  • Identify and address technical debt in key areas
  • Develop career growth plans for all team members
• First year:
  • Team consistently delivers on commitments with high quality
  • Measurable improvement in system performance and reliability
  • Team members show clear growth and development

Benefits

• Unlimited Flexible Time Off for work-life balance
• Private health insurance with dental coverage for you and your family
• Personalized career roadmap with clear growth paths
• Professional development through training, conferences, and educational opportunities
• Annual corporate events and team gatherings
• Remote-first culture with flexible working hours (10:00–19:00)
• Leadership development programs and coaching
• Competitive compensation reflecting leadership responsibilities

Employment Details

• Location: Remote (worldwide)
• Employment Type: Full-time
• Schedule: 10:00–19:00 (flexible)
• Contract: Employment agreement (entity or EOR arranged per candidate location)

Equal Employment Statement

Xsolla is dedicated to creating a diverse environment and is proud to be an equal-opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, language, sexual orientation, national origin, genetics, political beliefs, disability, age, marital status, social background or other characteristics. We are committed to compliance with all fair employment practices regarding citizenship and immigration status.

Contact

If you have questions regarding our hiring practices, please contact [email protected] . For more vacancies, visit: xsolla.com/careers .

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.