Senior Software Engineer with C# | 17-20K

Frends Technology Oy; Gdynia; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

A Nordic integration platform company in Gdynia is seeking a Senior Software Engineer to deliver integrations using their platform. The ideal candidate should have over 4 years of software development experience, including proficiency in C# and .NET. The role offers a competitive salary, flexible working hours, and a supportive team environment with benefits like healthcare subsidies and hybrid work options.

Benefits

B2B or employment contract

Flat organization structure

Competitive salary 17-20K

Flexible work-life balance

Subsidy to private healthcare

Hybrid work

Pizza days

Monthly massage in the office

Free car parking

Qualifications

• Experience as a Software Developer of 4+ years.
• Coding experience, preferably in C# / .NET.
• Previous experience in a similar role.
• SQL skills.
• Interest in BPMN-based integration flows.

Responsibilities

• Deliver integrations using the Frends platform.
• Develop, automate, and optimize business processes.
• Work with data mappings, transformations, and message routing.

Skills

XSLT

XML

XSD

JSON

WSDL

WCF

HTTP

Web Services (REST, SOAP)

Process thinking

C#

.NET

SQL

Fluency in Polish

Good English

Tools

Microsoft BizTalk

Job description

🚀 About Us

We’re a Nordic iPaaSproduct company — not a traditional outsourcing agency.

Are you tired of working on short-term contracts? Or for clients who treat you like just another contractor? Or maybe you simply prefer working with a product company with a great, supportiveteam around you? If so, keep reading! 🙂

We’ve built our own product: Frends, a modern low-code integration platform that helps solve digitalization challenges for both global enterprises and smaller organizations. Frends is used across various industries and in private and public sectors. We deliver integrations that automate business processes — making our customers’ operations easier, more efficient, and more effective.

As a Senior Software Engineer on our team, you’ll be responsible for delivering integrations using the Frends platform. Your day-to-day work will also include developing, automating, and optimizing business processes. You’ll work with data mappings, transformations, and message routing, and create scalable, efficient orchestrations following the Service‑Oriented Architecture (SOA) model.

🧐 Skills that we would like you to have

• Interest in our magic words: XSLT, XML, XSD, JSON, WSDL, WCF, HTTP, and Web Services (REST, SOAP)
• Process thinking (you will use BPMN-based integration flows)
• +4 years of experience as a Software Developer
• Coding experience, preferably in C# / .NET
• Previous experience in a similar role
• SQL skills
• Fluency in Polish and good English

Experience with Microsoft BizTalk or similar integration platforms, system integration / interfaces or SOA development patterns is an advantage.

🏆 What do we offer?

• B2B or employment contract - you choose what is most convenient
• Flat organization structure - you are empowered to do what is needed
• A competitive salaryadequate to your expertise, 17-20K
• Flexible employer with respect to your work‑life balance
• Subsidy to private healthcare and multisport card
• Professional colleagues and supportive team lead
• Hybrid work with no additional conditions
• Pizza days and integration parties
• Massage monthly in the office
• Working in a Nordic company
• Flexible working hours
• Free car parking

Overall, we are around 250 Frendszies in 9 countries, and in Poland, a bit over 30. We try to organize a Frends company‑wide party in Finland yearly, where you get to meet everyone else too.

💎Top workmates coupled with challenging and versatile projects with a powerful platform that enables digitalization and process automation – that’s Frendszone. Strong team spirit as well as trust, freedom, and flexibility are the cornerstones of our culture.

➡️ Read about our Poland teamculture from our blog.

⭐ Interested in joining us?

If you want to impact and join our growth journey, please contact us and let us know more about you! The start is flexible according to your situation.

🧐 Want to know more about Frends?

➡️ Learn more about us from our FAQ blog.

➡️ Read from our blog why talents choose Frends and why Frendszies stay with us.

➡️ Read more about what it's like to develop integrations with Frends iPaaS from our blog, which includes a demo video. You can also check our Frends product documentation page.

Frends is recognized 3rd year in the Gartner® Magic Quadrant™ for Integration Platform as a Service, Worldwide. Frends was also awarded in G2 review with the "Momentum Leader (API Management)", "Best Usability", "Easiest to Use & Admin", "Highest User Adoption", "Most Implementable", "Fastest Implementation", and "Fastest Time to Value" badges in 2025. Our customers give us 4.7 out of 5 stars on Gartner Peer Insights.