Backend Technical Lead (Node.js + Blockchain)

(Node.js · Fintech · Payments · Blockchain · TON · TRON · High-Load Architecture)


Tetracode is looking for a skilled Backend Technical Lead to join our team. As a Backend Technical Lead, you will lead the architecture, development, and delivery of complex backend systems across fintech, payments, and blockchain environments. You will drive technical decisions, define scalable system architectures, integrate multiple financial rails (fiat + crypto), and ensure reliability, security, and compliance across the entire platform.
This is a leadership role that combines backend engineering excellence, fintech expertise, blockchain integrations, and strong architectural thinking.

Key Responsibilities

1) Architecture & Technical Strategy

 • Design and own end-to-end architecture of distributed backend systems
• Define technical standards, API contracts, service boundaries, and integration patterns
• Build scalable microservice and event-driven systems (Kafka/RabbitMQ/SQS)
• Ensure system reliability, observability, monitoring, and failover strategies
• Transform business requirements into architectural roadmaps and technical documentation
• Validate estimations, perform technical reviews, and guide engineering decisions

2) Backend Engineering Leadership

 • Lead backend development using Node.js, TypeScript, NestJS
• Oversee code quality, design patterns, testing standards, and CI/CD processes
• Build high-load, low-latency services for real-time operations
• Lead refactoring, performance improvements, and infrastructure optimization
• Mentor engineers, guide mid/senior developers, support hiring and onboarding

3) Payments, Cards & Fintech Infrastructure

• Integrate and maintain payment gateways, processors, acquirers
• Work with crypto and fiat rails: cards, SEPA/SWIFT, IBAN accounts, top-ups, payouts
• Build internal financial ledgers, commission engines, fee logic, reconciliation systems
• Implement 3DS, webhook systems with idempotency, and settlement workflows
• Integrate KYC/AML/KYB vendors (Sumsub, Persona, Veriff, etc.)
• Implement anti-fraud, risk scoring, transaction monitoring
• Ensure PCI DSS, GDPR and security compliance

4) Blockchain Integrations (TON, TRON, EVM, Solana)

 • Architect and implement blockchain modules for signing, indexing, and transactions
• Interact with TON (tonweb/blueprint), TRON (TronWeb/TRC-20), EVM (ethers.js), Solana (SPL)
• Build multi-chain wallet logic (custodial + non-custodial flows)
• Work with smart contracts, events, gasless mechanics, fee abstraction
• Implement secure on-chain/off-chain synchronization
• Build indexers, parsers, notification pipelines, VRF/lottery logic if required

5) Security, Compliance & Data Protection

 • Implement secure storage, tokenization, encryption, and key management
• Lead threat modeling and resolve vulnerabilities
• Build complex permission systems (RBAC/ABAC), audit logs, fraud detection
• Ensure compliance with international financial standards
• Coordinate with legal/compliance teams on transaction/AML policies

6) Cross-Functional Leadership & Communication

 • Lead technical communication with clients and stakeholders
• Present architecture decisions clearly and defend technical choices
• Collaborate with frontend, mobile, DevOps, QA, product, and UX teams
• Support sprint planning, roadmap execution, release management
• Ensure alignment between engineering and business goals

Requirements

  Technical Core

• 6+ years of backend development with Node.js
• Expert-level TypeScript
• Deep experience with NestJS and backend enterprise architecture
• Strong understanding of microservices, distributed systems, and event-driven flows
• Experience with SQL/NoSQL (PostgreSQL, Redis, MongoDB)
• Knowledge of queues, schedulers, caching, and horizontal scaling
• Strong DevOps understanding: Docker, CI/CD, containers, cloud services

  Fintech & Payments

• Experience integrating payment providers, on/off ramps, card issuing
• Knowledge of settlement cycles, ledgers, reconciliation, FX conversions

• Understanding of AML, risk monitoring, KYT, compliance frameworks

   

  Blockchain

• Practical experience with TON, TRON, EVM
• Understanding of smart contracts, gas models, event subscription

• Experience building blockchain-enabled backend systems

   

  Security

• Understanding of OAuth2, SSO, JWT, Keycloak/Auth0
• Knowledge of encryption, hashing, HSM-like architectures

• Experience building reliable role/permission systems

   

  Leadership

• Experience managing cross-functional teams
• Strong analytical thinking and ownership mindset
• Excellent communication skills (client-facing)

• English B2+

   

  Will Be a Plus

• Experience with mobile wallet architecture (iOS/Android)
• Understanding of L2 rollups, zk tech, or advanced DeFi mechanics
• Experience with high-load gaming or real-time reward systems

• Knowledge of tokenomics, vesting, staking, DAO modules

   

What we offer

• Technological Challenges: You will participate in exciting technological projects where you can apply your skills and abilities.
• Team Collaboration: You will work in a team of highly skilled professionals who support each other and collectively achieve goals.
• Development Opportunities: We are committed to your professional growth and development. You will have the opportunity to learn and enhance your skills.
• Flexible Working Conditions: We understand the importance of maintaining a work-life balance. You will have the option to choose a flexible work schedule.
• Career Growth: At Tetracode, we support your career growth. You can move up the career ladder, expanding your responsibilities and opportunities.

• Transparent and Competitive Compensation: We recognize that your work and contribution are vital to our success. Therefore, we offer transparent and competitive compensation that reflects your skills, experience, and contribution to the project.

   

  Join Tetracode and become part of our innovative and cohesive team, where exciting challenges and opportunities for your professional growth await you!