Senior Frontend Developer
Apply-
Specialization Frontend Developer
-
Experience Senior
-
Location Gdańsk, Gdynia, Łódź, Warszawa
-
Working mode Hybrid
-
Salary B2B: 900 – 1 200 PLN/day
Salary: 900-1200 PLN/day on B2B
Work model: hybrid from Gdynia / Gdańsk / Warszawa / Łódź (2/3 days per week from the office)
Why choose this offer?
- You can expect a flexible work organization
- The international work environment will give you the opportunity to interact with the English language on a daily basis
- Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit)
- The Jit community will bring you a nice time during regular integration meetings
Project
You will be involved in a financial project focused on building secure, high‑performance, and highly interactive web applications that support complex business workflows, real‑time data processing, and seamless user experiences. You’ll play a key role in shaping the frontend architecture, ensuring code quality, and driving technical excellence across the team.
Responsibilities you’ll have
- Architect and implement complex, interactive user interfaces and single‑page applications using TypeScript and JavaScript
- Define and maintain best practices for frontend architecture, state management, and component reusability
- Develop and maintain Web Components using Lit, ensuring modularity and long‑term maintainability
- Optimize application performance, improve Core Web Vitals, and ensure smooth experiences across devices and browsers
- Collaborate closely with backend engineers, UX/UI designers, and product managers to deliver end‑to‑end product features
- Integrate with REST and GraphQL APIs, ensuring reliability, security, and consistency of data flows.
- Conduct performance audits, code reviews, and mentor other developers
- Contribute to CI/CD pipelines and deployment workflows (nice‑to‑have)
- Participate in system design discussions and influence technical decisions across the product
Expected competences and knowledge
- Strong expertise in HTML, CSS, JavaScript, TypeScript
- Experience with Web Components and Lit
- Solid understanding of Node.js and npm ecosystem
- Experience writing unit tests with Vitest
- Strong knowledge of frontend architecture, design patterns, and performance optimization
- Ability to work with REST/GraphQL APIs
- Experience in large‑scale, modular frontend codebases
- Strong communication skills and ability to collaborate in cross‑functional teams
Technologies you’ll work with
- TypeScript, JavaScript
- Web Components, Lit
- HTML5, CSS3, Sass
- Node.js, npm
- Vitest, Playwright (optional)
- REST, GraphQL
- CI/CD tools (GitHub Actions, GitLab CI, or similar)
- Kafka, MQ systems (nice‑to‑have)
- NinjaFork (nice‑to‑have)
Client – why choose this particular client from the Jit portfolio?
Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client’s premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer’s work atmosphere is epitomized by the Scandinavian culture, which is conducive to people who place emphasis on work-life balance and feedback culture. Furthermore, all projects are executed in international teams, giving constant exposure to the English language.
About Jit Team
The Human Factor of IT – it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts, to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams.
Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.
Here’s how we get from first “hello”
to “welcome aboard”
You’ll meet with our HR team to discuss your experience, approach to software development, and teamwork. We’ll also verify your English language proficiency as part of the conversation. Then, you’ll take part in a technical interview focused on your skills and problem-solving mindset.
If both interviews go well, we’ll match you with a project aligned with your skills and expectations. You’ll then meet the client – this is where the final project-related decision is made.
Based on feedback and your preferences, we’ll prepare an offer tailored to your experience. We’ll agree on the project, salary, type of contract, and your start date.
We start with a short phone conversation to get to know each other. We’ll talk about your experience, career goals, and motivation, while giving you a chance to learn more about Jit Team and the role.
Depending on the role, you’ll complete a short recruitment task to showcase your skills. We’ll also verify your English language proficiency as part of this stage.
Next, you’ll meet your future Team Leader at our office. We’ll discuss your experience, ways of working, and how your skills match the role, while giving you a better understanding of the team and day-to-day collaboration.
If we’re a good match, we’ll prepare an offer tailored to your experience. We’ll agree on the salary, type of contract, and your start date. Welcome to Jit Team!
Benefits
We believe a great workplace is more than a set of benefits. It’s about trust, long-term relationships, and an environment where people can do their best work.
Jit Academy
Share and gain experience. Jit Academy is a platform serving a mutual knowledge exchange. Lecture others and share your expertise or join the audience.
Jit Communities
Join the group of experts. We ensure constant growth, that’s why we keep building communities dedicated to mutual education.
Growth support
We value people who are looking to develop their skillset. We proudly finance a variety of courses and certifications so that you can gain new competencies.
Jit Summer Office
Gain access to the office located at the very beach in Chałupy. Jit Trailer awaits visits of the team members and their families.
Jit Boats
Cruise the bay thanks to the motorboat awaiting at the Yacht Park in Gdynia. Furthermore, there is a fleet of jet skis and kites located at the beach in Chałupy.
Recommendations program
Would you recommend any IT specialist we could hire? Share the contact and gain a bonus if we hire them.
Flexible work hours
Start the day without haste.
At Jit, we begin and finish the day of work within a certain time frame, in stead of fixed hours.
Bonuses for content creators
We provide bonuses to those willing to participate in industry events as public speakers, and to content creators writing articles for our blog.
Mental health support
Mental health is fundamental. Take advantage of psychologists and psychotherapists’ support and reach for psychoeducational content on the wellbeing platform
Up-to-date equipment
We provide our teams with high-quality gear necessary to work. Choose between MacOs or Windows and work the way you prefer.
Teambuilding events
Meet new, interesting people. We’re dedicated to building human relations and often host informal events that bound our team members.
English lessons
Classes conducted for small groups, lectured
by our teachers, guarantee rapid results.
Private healthcare
Take care of your wellbeing. Members of Jit Team, gain access to a wide range of medical plans provided by Medicover or PZU.
Gym membership card
We provide Multisport and Medicover Sport gym cards so that you can improve your physical condition.
Life insurance
Increase your safety. No matter the form of employment, we provide life insurance plans to our colleagues.
Haven’t found a suitable job description, but you
still wanna be a part of The Team?
Let’s talk – your next role might not be listed yet.