Senior Frontend (React) Developer

OPTIVEUM sp. z o.o.; Warszawa; Hybrid; PLN 220,000 - 320,000; Full time

Benefits offered by this job

Hybrid work model (3 days in the офfce

Contracting partner: Optiveum

Financial-domain project

Job summary

Optiveum – your recruitment partner – is seeking a Senior React Developer to join a financial-domain project. You will contribute to the UI renewal, work with Backend and QA teams, and help maintain and support the investment fund orders administration interface.

The role is full-time with a hybrid work model (3 days in the office in Warsaw) and a B2B contract through Optiveum. You will collaborate across agile teams to deliver robust, secure UI solutions.

Qualifications

• Proficient in React.js v18+ and modern UI tech stacks.
• Experience with React Query, TypeScript and RTL for testing.
• Knowledge of Material UI and Tailwind for styling.
• Strong communication and teamwork with cross-functional teams.

Responsibilities

• Develop and maintain the redesigned UI using modern tech and new business requirements.
• Assist in production rollout and stabilization of releases.
• Provide issue troubleshooting and bug fixes for new and existing features.
• Take ownership of day-to-day UI support to ensure operational continuity.
• Improve code quality and address vulnerabilities and dependencies.
• Collaborate with Backend, QA, BA, and end users to clarify requirements.

Skills

React.js (v18+)

React Query

TypeScript

React Testing Library

Material UI

Tailwind

React Form

Hook-oriented programming

Strong communication skills

General JavaScript proficiency

Tools

Jenkins

TanStack libraries

Basics of Java and SpringBoot

Job description

Senior Frontend (React) Developer

• Rate: up to 130 PLN/h net + VAT (B2B)

• Work Model: Hybrid (3 days per week from the office)

• Location: Warsaw, Poland

• Engagement: Full-time (40 hours/week)

About the Role:

We are Optiveum – your recruitment and contracting partner. We are currently looking for a Senior React Developer to join the team of our client, a renowned organization operating in the financial and investment sector. In this role, you will work alongside the current Frontend Developer on the development, maintenance, and support of an Investment Fund Orders’ processing administration UI application.

Please note: Optiveum is the recruitment and contracting party for this role. You will be signing the cooperation agreement directly with us.

Responsibilities:

• Contributing to the ongoing development of the redesigned UI application using modern technologies and implementing new business requirements.

• Supporting the preparation, stabilization, and production rollout of upcoming releases.

• Providing application support, troubleshooting, and bug fixing for existing and newly delivered functionalities.

• Taking over day-to-day UI support responsibilities to ensure continuity of operations.

• Improving and maintaining code quality, including the remediation of identified vulnerabilities and framework dependencies.

• Collaborating closely with Backend Developers, Business Analysts, Test Engineers, and end-users to clarify requirements, investigate issues, and deliver solutions.

• Participating in Agile team activities, including backlog refinement, sprint planning, reviews, and production support.

Must-have skills:

• React.js (v18 or higher)

• React Query

• TypeScript

• React Testing Library

• Material UI

• Tailwind

• React Form

• Hook-oriented programming

• Strong communication skills

Nice-to-have skills:

• Basics of Java and SpringBoot

• Other TanStack libraries

• Jenkins

• General JavaScript proficiency

What we offer:

• Transparent cooperation—Optiveum will be your dedicated contracting partner.

• Seamless B2B contract setup and ongoing support.

• Opportunity to work on a modern tech stack within a complex, financial-domain project.