---
title: "Freelance Senior .NET Developer / Tech Lead at WISE INTEGRATION – All Job Board"
---

# Freelance Senior .NET Developer / Tech Lead at WISE INTEGRATION

Written by

[admin](https://alljobboard.com/author/admin/)

in

- [Lithuania (Remote)](https://maps.google.com/maps?q=Lithuania%20%28Remote%29&zoom=14&size=512x512&maptype=roadmap&sensor=false)
- Posted 2 weeks ago

![WISE INTEGRATION](https://alljobboard.com/wp-content/plugins/wp-job-manager/assets/images/company.png)

 **WISE INTEGRATION**

### Project/Client: Fintech

### Location: Lithuania

### \*\*Start Date:\*\*ASAP

### Duration: 12 months

### \*\*Language:\*\*English

### Role Overview:

We’re looking for a Senior .NET Developer / Tech Lead to join our engineering team and build payment-focused backend solutions in a regulated fintech environment. This is a hands-on role combining software development with technical leadership. You’ll design and develop backend services, contribute to technical and architectural decisions, and help the team maintain high engineering standards.

### Key Responsibilities:

- Design and develop backend services using C# / modern .NET
- Contribute to technical design and architectural decisions
- Build integrations with REST APIs, third-party platforms, messaging, and file-based interfaces
- Ensure code quality through code reviews and engineering best practices
- Mentor developers and lead technical discussions
- Work with SQL, relational databases, CI/CD, and Docker
- Build secure, reliable, and scalable software solutions
- Collaborate with product, compliance, QA, and other engineering teams

### Must-Have Requirements:

- 7+ years of hands-on C# / .NET experience
- Strong backend development experience
- Experience with REST APIs, integrations, and distributed systems
- Strong SQL and relational database experience
- Experience with Docker and CI/CD
- Understanding of secure and reliable software development
- Experience as a Senior Engineer, Tech Lead, or similar
- Ability to take technical ownership and guide other developers

### Nice to Have:

- Experience in payments, banking, fintech, or financial services
- Experience in a regulated / compliance-driven environment
- Knowledge of ISO 20022 / SEPA
- Understanding of clearing, settlement, or payment processing
- Experience with Azure or AWS

Originally posted on Himalayas

**Source:** this listing was published by [Himalayas](https://himalayas.app/). [View the original posting and apply](https://himalayas.app/companies/wise-integration/jobs/freelance-senior-net-developer-tech-lead?utm_source=api) — applications are handled there, not on this site.

To apply for this job please visit [himalayas.app](https://himalayas.app/companies/wise-integration/jobs/freelance-senior-net-developer-tech-lead?utm_source=api).

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