Capital2mo ago

Senior Full Stack Engineer - React + Node.js

Poland·WarsawHybridsenior

EngineeringOtherFrontend EngineeringFullstack Developer

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Overview

Technical Tools

awsgcpjavascriptmysqlnestjsnextjspostgresqlreacttypescriptagileapi-designci-cdcode-reviewetlfintechrest-apis

We are a leading trading platform ambitiously expanding to the four corners of the globe. Our top-rated products have won prestigious industry awards for their cutting-edge technology and seamless client experience. We deliver only the best, so we are always in search of the best people to join our ever-growing talented team.
We are looking for a Senior Full Stack Engineer to join our Engineering Excellence team within the Product & Engineering department. In this role, you will take end-to-end ownership of building and evolving a key internal operational platform — a productivity and visibility tool designed to empower managers with the insights and capabilities they need to lead their teams effectively.
You will work closely with engineering, product, and management stakeholders across the organisation to understand their needs and translate them into well-architected, scalable solutions. Your contributions will have a direct and measurable impact on how our teams operate and grow.

Design, build, and maintain a full-stack internal platform serving operational and management use cases across the organisation;

Take end-to-end ownership of features — from architecture and API design through to frontend implementation and deployment;

Build clean, performant, and maintainable user interfaces using React / Next.js and TypeScript;

Develop robust backend services and RESTful APIs using Node.js and NestJS;

Collaborate closely with engineering managers and product stakeholders to gather requirements and define solutions;

Contribute to technical decisions, code reviews, and engineering best practices within the team;

Ensure reliability, scalability, and security of the platform as adoption grows across the company.

5+ years of professional software engineering experience, with strong full-stack expertise;

Solid proficiency in TypeScript and modern JavaScript ecosystems;

Strong experience with Next.js for building production-grade frontends;

Hands-on experience with Node.js and NestJS (or similar backend frameworks);

A solid understanding of RESTful API design and backend architecture principles;

Hands-on experience with relational databases (e.g. PostgreSQL or MySQL) and solid understanding of data modelling and query optimisation;

Comfortable working in an agile environment with a high degree of ownership and autonomy;

Strong communication skills — able to collaborate effectively with both technical and non-technical stakeholders.

Hands-on experience working with data — including data pipelines, aggregations, or analytics integrations;

Experience building internal tooling, dashboards, or management platforms;

Familiarity with CI/CD pipelines and DevOps practices;

Experience with cloud infrastructure (AWS or GCP);

Prior experience in a fintech or high-growth technology company.

Competitive compensation;

A generous paid leave policy, supporting a healthy work–life balance;

Two additional paid days per year dedicated to volunteering and giving back;

Private medical insurance for your peace of mind;

An additional flexible benefits budget, allowing you to tailor benefits to your needs;

Flexible working mode;

The opportunity to work from almost anywhere in the world for up to 30 days per year;

Annual company-wide events held in locations around the globe;

In-office massages to support wellbeing.

Be a key player at the forefront of the digital assets movement, propelling your career to new heights! Join a dynamic and rapidly expanding company that values and rewards talent, initiative, and creativity. Work alongside one of the most brilliant teams in the industry.