Senior Fullstack Engineer (C#/ .NET + Angular)

Instinctools; Polska; Hybrid; PLN 499,000 - 691,000; Full time

Benefits offered by this job

Fully remote setup

Social benefits package

Career development opportunities

Learning opportunities and conferences

Job summary

instinctools is seeking a Senior Full Stack Engineer (C#/ .NET + Angular) for a FinTech client. You will design and develop high-performance interfaces while contributing to backend services and APIs, shaping end-to-end functionality for analytics platforms.

Ideal candidates have 6+ years of experience, strong C#/.NET and Angular/TypeScript expertise, REST APIs, and cloud awareness. Remote setup, cross-region collaboration, and a focus on automation and leadership are valued.

Qualifications

• 6+ years of experience as a Full Stack Developer
• Proficiency in C#/.NET, ASP.NET Core, Entity Framework
• Experience with Angular and TypeScript
• Experience designing and consuming RESTful APIs
• Familiarity with cloud-based architectures and distributed systems
• Experience in agile development
• Bachelor’s degree in CS/Engineering
• Self-starter with strong communication and ownership
• Attention to detail and ability to work in fast-paced environment
• Leadership and accountability for work undertaken

Responsibilities

• Design, build, and maintain backend services, APIs, and core logic
• Improve scalability, reliability, security, and performance
• Design, develop, and maintain frontend applications with Angular/TypeScript
• Build reusable UI components and scalable frontend architectures
• Develop and maintain data pipelines and integrations
• Write and review automated tests to ensure code quality
• Collaborate with engineers, product managers, and client-facing teams
• Contribute to software design discussions, code reviews, and documentation
• Support end-to-end delivery from design to deployment and monitoring

Skills

C#/ .NET

ASP.NET Core

Angular

TypeScript

REST APIs

SQL

NoSQL

Cloud architectures

Agile

Leadership

Communication

B2 English

Education

Bachelor’s degree in computer science / engineering

Tools

REST APIs

Entity Framework

Job description

*instinctools is a software development company that provides custom software solutions for businesses of all sizes. Our team works closely with clients to understand their specific needs and provide personalized solutions that meet their business requirements.

Our team is looking for a Senior Fullstack Engineer (C#/ .NET + Angular) for one of our clients.

The client is a rapidly growing FinTech company delivering SaaS analytics solutions to institutional investors.

The project is dedicated to building and scaling a platform delivering comprehensive tranche, deal, manager, and market analytics. This role focuses primarily on designing and developing intuitive, high-performance user interfaces, while also contributing to backend services and APIs that support seamless end-to-end functionality.

The ideal candidate brings a strong blend of front-end and back-end engineering expertise, with the ability to translate complex financial workflows into elegant, scalable, and responsive applications.

Project team: ~15 people (data engineers, sales, and related functions)

Tech stack: C#/.NET, ASP.NET Core, Entity Framework, Angular, TypeScript, REST APIs, NoSQL

Location: Poland, EU, Georgia

Our expectations of the candidate:

• 6+ years of experience as a Full Stack Developer, ideally within the FinTech or technology space
• Proficiency in server-side programming languages and technologies: C#/.NET, ASP.NET Core, Entity Framework, SQL (Python is a plus)
• Experience with web frameworks and technologies: Angular and TypeScript
• Experience designing and consuming RESTful APIs, and working with relational and/or NoSQL databases
• Familiarity with cloud-based architectures, distributed systems, and modern deployment practices
• Experience working in agile development environments, contributing to a collaborative team
• Experience supporting data-intensive, client-facing applications
• Bachelor’s degree in computer science, engineering, or a related field
• Self-starter who is passionate about technology
• Keen eye for automation and improving efficiency
• Ability to provide leadership and accountability for work they undertake
• Takes ownership of their work and has exceptional attention to detail
• Has excellent communication skills and the ability to articulate their thoughts and ideas
• Comfortable with fast-paced and strongly collaborative environments
• Able to take on ideas and feedback from both technical experts and business thought-leaders.

Spoken English: Upper-Intermediate (B2+)

Responsibilities

• Design, build, and maintain backend services, APIs, and core application logic supporting a client-facing platform
• Help improve scalability, reliability, security, and performance
• Design, develop, and maintain modern, responsive frontend applications using Angular and TypeScript
• Build reusable UI components and scalable frontend architectures
• Develop and maintain data pipelines and integrations with internal and external systems
• Write, maintain, and review automated unit and integration tests to ensure code quality and system stability
• Optimize performance and proactively identify technical risks
• Collaborate with engineers, product managers, and client-facing teams to translate business requirements into technical solutions
• Contribute to software design discussions, code reviews, and documentation across the team
• Support end-to-end delivery of features from design through deployment and post-release monitoring

We offer:

• fully remote setup and flexible working time (overlap with New York time is expected)
• social benefits package
• transparent system of professional and career development
• learning opportunities, seminars and conferences and time for exploring new technologies
• the opportunity to realize your potential outside the projects: we arrange meetups and conferences where our staff can perform, develop professional communities

Join us and be part of a team that is changing the world through technology.

Developers

*instinctools is a developer of IT solutions for Western Europe. We have over 350 projects in our portfolio. The spheres are different – from healthcare and medicine, training and education, to digital advertising, economics and IT. For the software implementation and maintenance across such a number of projects, competent developers are important.

We use a modern technology stack, the key of which are: