Senior Fullstack Engineer

MLabs

Senior Fullstack Engineer developing and maintaining both frontend and backend systems for trading platforms. Engaging in comprehensive testing and collaborating with product and design teams in a fully remote environment.

Posted 7/23/2026full-timeRemote • 🇵🇱 PolandSenior💰 $120,000 - $150,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and maintaining React-based user interfaces with a strong focus on TypeScript, REST APIs, and WebSocket protocols. Capable of optimizing performance and ensuring smooth interactions while collaborating effectively with cross-functional teams.

Highest-signal resume keywords

React DevelopmentTypeScript ExpertiseREST API DevelopmentWebSocket ProtocolsUnit Testing

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Hard Skills

TypeScriptReactREST APIsWebSocketNode.jsPostgreSQLPrismaRedisUnit TestingIntegration Testing

Soft Skills

Effective CommunicationCollaboration

Tools & Technologies

BunCI/CD ToolsOpenAPIAsyncAPI

Industry Keywords

Fullstack Software EngineeringComponent ArchitectureState ManagementResponsive DesignEvent-Driven Pipelines

Tech Stack

Tools & technologies

JavaScriptNode.jsPostgresReactRedisTypeScript

About the role

Key responsibilities & impact

Build and maintain the React-based trading user interface.
Implement dynamic, interactive interfaces for real-time data, including live order book updates, price feeds, and trade executions via WebSockets.
Own component architecture, state management, and responsive design.
Optimize rendering, minimize load times, and ensure smooth, low-latency interactions under heavy data loads.
Collaborate closely with product and design teams to translate complex requirements into intuitive user interfaces.
Design and maintain TypeScript services, including REST APIs, WebSocket servers, and background services.
Design and deliver event-driven pipelines that ingest and process pricing and account data.
Own REST and WebSocket API contracts (OpenAPI / AsyncAPI specs), ensure smooth data flow between frontend and backend, and maintain API documentation.
Interact with on-chain data, index blockchain events, and bridge smart contracts with off-chain services.
Develop and maintain comprehensive unit, integration, and end-to-end tests across frontend and backend systems.
Uphold continuous integration (CI) quality gates and rigorous code review standards.
Work closely with cross-functional teams, including product, design, and quantitative specialists.

Requirements

What you’ll need

Experience: 6+ years of professional experience in fullstack software engineering.
Core Tech Stack: Deep expertise in TypeScript across both frontend and backend development.
Frontend: Strong experience with React and modern state management patterns (hooks, context, or equivalent).
Backend & APIs: Experience building and consuming REST APIs and WebSocket real-time data protocols; proficiency with Node.js or Bun server-side runtimes.
Databases & Caching: Experience with relational databases (PostgreSQL) and ORMs (Prisma or equivalent), along with familiarity with Redis or similar caching and pub/sub systems.
Engineering Standards: Commitment to writing clean, maintainable code, backed by solid experience in unit, integration, and end-to-end testing methodologies.
Communication: Clear and effective communication skills suitable for a fully remote, distributed, cross-functional team environment.

Benefits

Comp & perks

100% Remote: Fully remote work arrangement with global flexibility.
Competitive Compensation: Industry-aligned salary package reflecting senior-level experience.
Professional Growth: Opportunity to solve complex technical challenges at the cutting edge of finance and web technology