SR. Full-stack Developer + AI experience

Join; United States; Remote; USD 140,000 - 190,000; Full time

Benefits offered by this job

Flexible work time

Multicultural environment

Career growth opportunities

Payroll and benefits

Job summary

Simpat Tech in the United States is seeking a Senior Full-stack Developer to join our Simpat Tech Family. You will own end-to-end development using .NET and modern front-end stacks, delivering robust, scalable software.

You will thrive in a multicultural team, mentor peers, and drive best practices, including CI/CD and AI-assisted development. The role emphasizes collaboration, innovation, and growth opportunities within a supportive environment.

Qualifications

• 8+ years of professional software development required.
• Strong OOP and C#/.NET expertise.
• Experience with React/Angular/Vue and modern front-end.
• Cloud-native apps on Azure or AWS.
• MS SQL database design and optimization.
• Familiar with SOLID principles and design patterns.
• Fluent English, written and spoken.
• Experience with CI/CD and AI coding assistants is a plus.

Responsibilities

• Develop end-to-end web applications with .NET Framework/.NET Core and modern front-end frameworks.
• Design scalable, cloud-native systems on Azure or AWS.
• Build and maintain MS SQL databases for performance and integrity.
• Lead development with Agile and Lean practices.
• Apply SOLID principles and design patterns to code.
• Develop unit and integration tests.
• Mentor peers and contribute to continuous improvement.

Skills

8+ yrs exp

OOP

.NET/C#

React/Angular/Vue

Azure/AWS

MS SQL

SOLID & patterns

English fluency

Tools

GitHub Actions

Azure DevOps

Job description

We're a custom software development company that empower organizations by becoming their trusted technical partner.

We have won awards for being one of the Best Places to Code four years in a row, something that none of our competitors can say! Our work environment is based on innovation, trustworthiness, and fellowship.

We're always looking for passionate people, who want to create solutions that improve organizations and the lives of people in them.

Rings a bell? Perfect! We have an amazing opportunity as a Senior Full-stack Developer to join our Simpat Tech Family!

Tasks

• Develop end-to-end web applications DotNET Framework and .NET Core for back-end development along with modern front-end frameworks like Vue.js, React, and Angular
• Design and implement scalable, high-performance systems with cloud-native technologies (Azure or AWS).
• Build and maintain relational databases, with a focus on MS SQL, ensuring optimal performance and data integrity.
• Lead development efforts using Agile methodologies with a strong focus on Lean software development principles.
• Apply SOLID principles and design patterns to write maintainable, high-quality code.
• Develop unit tests and integration tests to ensure the stability and reliability of your code.
• Collaborate in a multicultural, diverse team environment where everyone's ideas are valued. Contribute to a culture of continuous improvement, helping your peers level up through mentoring and knowledge sharing.

Requirements

• 8+ years of professional software development experience
• Strong OOP understanding
• Experience in .NET/C#
• ReactJS or Angular or VueJS experience
• Experience with cloud native technologies within Azure or AWS
• Relational database design experience (MS SQL preferred)
• Background experience with SOLID. principles and design patterns
• Fluent in English, spoken and written

AI & Modern Development

• Experience on setting up CI/CD pipeline (GitHub Actions, Azure DevOps, TeamCity, Octopus is preferred)
• Experience using AI coding assistants (Claude Code, Codex, GitHub Copilot, etc.) to accelerate development
• Experience deploying AI features to production

Nice to Have:

• Proven experience integrating with Azure OpenAI or the OpenAI API
• Hands-on experience with at least one vector database (Azure AI Search, Pinecone, Qdrant, or PGVector)
• Understanding of RAG (Retrieval-Augmented Generation) patterns
• Familiarity with AI frameworks such as Semantic Kernel or similar

Benefits

• Career plan and growth opportunities
• Excellent company culture and working environment
• Flexible work time
• Collaborate in a multicultural environment
• Payroll and Law benefits
• Saving Fund
• Food Vouchers
• Major medical insurance with dental and visual coverage (Familiar)
• Life Insurance
• Personal Accident Insurance (Familiar)
• 10 EXTRA vacation days during the year Zero (increasing according to the law)
• Additional days: sick days, Improve Yourself Time, etc.
• Improve Yourself Budget (training, courses, certifications, etc.)
• Referral bonus and more

We always look for ways to reward those who stand out among their peers and demonstrate true dedication.

When we say we treat each other like family, we mean it!