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Senior Back-End Engineer (Node.js)

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Senior Back-End Engineer (Node.js)

We’re looking for a Senior Back-End Engineer to join a fast-growing international tech company focused on building modern, data-driven platforms that power digital transformation in the financial and enterprise sectors.

award icon Salary: 18,700-20,900 PLN/Month
award icon Warsaw, Poland (Hybrid - 3 days in office, 2 days remote)
award icon Full-time
award icon B2B or CoE

Requirements

checked icon Strong experience in building server-side applications using Node.js and Express.js.
checked icon Hands-on experience with API development and integration, particularly with GraphQL or RESTful services.
checked icon Strong knowledge of authentication and authorization mechanisms (OAuth, JWT, session-based).
checked icon Strong experience with databases such as MySQL and
checked icon PostgreSQL.
checked icon Experience writing unit tests with tools such as Chai and Mocha.
checked icon Strong experience using Git and version control systems.
checked icon Proficiency in English (both written and spoken).

Nice to have

checked icon Bachelor’s degree in Computer Science or a related field.
checked icon Experience with cloud platforms (AWS, Azure, or GCP), as well as containerization and orchestration tools such as Docker and Kubernetes.
checked icon Experience with microservices architecture.
checked icon Experience setting up CI for static analysis and test execution.
checked icon Experience developing RAG applications and storing data in vector embeddings.

Responsibilities

checked icon Design, build, and maintain scalable, high-performance server-side applications and RESTful APIs using Node.js and Express.js.
checked icon Guide and supervise the development of key code components to ensure long-term reliability and scalability.
checked icon Integrate with front-end components and third-party services.
checked icon Actively review the codebase, recommending and implementing refinements where needed.
checked icon Write unit and integration tests and optimize performance to ensure high-quality code.
checked icon Collaborate closely with cross-functional teams to define and implement technical solutions.
checked icon Improve system performance, reliability, and long-term maintainability through optimization and best practices.

Please include GDPR consent

I acknowledge, that by submitting the form I give consent for my personal data included in the application to be processed by DevsData LLC for the purposes of current and future recruitment processes in accordance with Art. 6 paragraph 1 letter a of the Regulation of the European Parliament and of the Council (EU) 2016/679 of 27 April 2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC (General Data Protection Regulation).
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globe icon Hybrid/Warsaw

Senior Back-End Engineer (Node.js)

18700 - 20900 PLN (18,700 - 20,900 PLN) net/month - B2B
net/month - B2B
18700 - 20900 PLN (18,700 - 20,900 PLN)
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DevsData LLC needs the contact information and your personal data to be processed for the needs of a recruitment process. For information on how to withdraw your consent, as well as our privacy practices and commitment to protecting your privacy, check out our Privacy Policy.
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What will be your next steps?

1

Quick non-technical
conversation

It's all about communication! We want to see how your social and decision-making skills can contribute to efficient team performance.

2

60 to 90 minutes technical
interview

During the technical interview, we want to assess the candidate's specific knowledge, skills, and abilities in relation to our client's needs.

3

Client
interview

The problem-solving challenge is all about using logic and creativity to make sense of a situation and develop an intelligent solution.

4

Offer

You did it! After managing to get through all of these rigorous stages, it's finally time to recommend you directly to our clients.

1

Quick non-technical
conversation

It's all about communication! We want to see how your social and decision-making skills can contribute to efficient team performance.

2

60 to 90 minutes technical
interview

During the technical interview, we want to assess the candidate's specific knowledge, skills, and abilities in relation to our client's needs.

3

Client
interview

The problem-solving challenge is all about using logic and creativity to make sense of a situation and develop an intelligent solution.

4

Offer

You did it! After managing to get through all of these rigorous stages, it's finally time to recommend you directly to our clients.
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I acknowledge, that by submitting the form I give consent for my personal data included in the application to be processed by DevsData LLC and transferred to customers, to whom eventually applied for the purposes of current and future recruitment processes in accordance with Art. 6 paragraph 1 letter a of the Regulation of the European Parliament and of the Council (EU) 2016/679 of 27 April 2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC (General Data Protection Regulation). Also, I agree for my data to be processed outside of the European Union, especially explicitly including countries like the United States, United Kingdom and Singapore. Consent is voluntary. I have the right to withdraw my consent at any time (data are processed until the withdrawal of consent). I have the right to access, rectify, delete or limit processing of the data, the right to object, the right to submit a complaint to the supervisory authority or transfer the data. The administrator is DevsData LLC located in 1820 Avenue M #481 Brooklyn, NY 11230, United States. The administrator processes data following the Privacy Policy.
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Best back-end engineers I've ever worked with.

“I interviewed about a dozen different firms. DevsData LLC is truly exceptional – their backend developers are some of the best I’ve ever worked with. I’ve worked with a lot of very well-qualified developers, locally in San Francisco, and remotely, so that is not a compliment I offer lightly. I appreciate their depth of knowledge and their ability to get things done quickly.”

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Nicholas Johnson

CEO of Orange Charger LLC,

Ex-Tesla Engineer,

Mentor at YCombinator

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Tailored recruitment process, trusted market expertise.

“DevsData reached out to us, as we’ve been looking to grow our engineering team in Europe and Poland. Communicating efficiently and professionally, DevsData made a strong impression with their understanding of the recruitment challenges we were facing. They designed a tailored recruitment process for our needs. I was impressed with the technical depth of their approach.”

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Karim Butt

Co-Founder & CTO at GlossGenius, Inc.

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Outstanding vendor, 21 engineers hired.

“Out of all the vendors we work with, DevsData clearly stands out. The quality of developers they deliver is beyond what we've received from any other vendor, and they've been able to send profile recommendations very quickly. I'm happy to be their reference for other companies from Israel and talk about their recruitment abilities and what they delivered for us.”

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Ran Eyal

Senior Manager at

ZIM Integrated

Shipping Services Ltd.

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Proactive partner, exceptional results.

“DevsData demonstrated a strong degree of proactivity, taking time to thoroughly understand the problem and business perspective, and continuously suggesting performance and usability enhancements. Their app exceeded my expectations. I've worked with DevsData on numerous projects over the last 3 years and I'm very happy. Being both responsive and honest in communication.”

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Jonas Lee

Partner & Executive VP of Verus,

Financial LLC, Investor,

& Serial Entrepreneur

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