C# Software Engineer Full Stack

TESOL International Association; Sunderland; Hybrid; GBP 46,000 - 55,000; Full time

Job summary

A leading technology employer in Sunderland is looking for a skilled C# Software Engineer / Developer to join their Platform team. This role involves backend development with C# .Net Core and exposure to JavaScript / React in an AWS environment. With a competitive salary of up to £55k and numerous perks including a hybrid work policy, free meals, and an onsite gym, this position promises professional growth in a collaborative, technology-driven environment.

Benefits

Competitive salary

Quarterly bonus

Holiday purchase scheme

Pension

Private medical care

Onsite gym

Free meals at restaurant

Free inner city parking

Free tickets to EFL matches

Family friendly policies

Social events

Qualifications

• Experience in C# .Net Core backend development.
• Able to build scalable and secure web applications.
• Frontend experience with JavaScript/React is a plus.
• Good knowledge of AWS is required.
• Excellent collaboration and communication skills.

Responsibilities

• Build real-time payment systems and integrations.
• Collaborate with various team members in a hybrid work environment.
• Participate in technical discussions within an Agile team.

Skills

C# .Net Core backend development

Building scalable web applications

JavaScript / TypeScript or React

Knowledge of AWS

Communication and mentoring

Tools

AWS

Docker

Terraform (IaC)

TeamCity

SQL

Redis

Job description

C# Software Engineer / Developer (.Net Core React AWS) Sunderland / WFH to £55k

Opportunity to progress your career in a senior, hands‑on role at a growing games / gambling site, whilst enjoying a range of benefits and perks. As a C# Software Engineer within the Platform team you'll build real‑time payment systems and integrations that handle large volumes of transactions. You'll have a focus on backend C# .Net core but will have exposure across the full tech stack through to JavaScript / React within an AWS cloud based environment with Docker, Terraform (IaC), TeamCity, SQL and Redis; you'll gain exposure to a wide range of technology and will be able to input into technical discussions within a collaborative Agile team.

Location / WFH

There's a hybrid work from home policy with 2-3 days a week; when you're in the office you'll be collaborating with fellow technologists in a relaxed environment in awesome custom built offices in Sunderland with a range of facilities and perks including free meals at the onsite restaurant as well as membership at onsite gym.

About you

• You have C# .Net Core backend development experience
• You have experience of building scalable, reliable and secure web applications using modern techniques
• You have experience of implementing frontend applications and have some JavaScript / TypeScript or React experience
• You have a good knowledge of AWS
• You're collaborative with great communication, mentoring and leadership skills

What's in it for you

• Competitive salary to £55k + quarterly bonus
• Holiday purchase scheme, plus an extra day for every your there (up to 5)
• Pension, Private medical care
• Onsite gym
• Onsite restaurant with free breakfast, lunch, snacks and drinks
• Free inner city parking
• Free tickets to EFL matches
• Hybrid working (x3 days a week office)
• Family friendly policies
• Social events and more!

Apply now to find out more about this C# Software Engineer / Developer (.Net Core React AWS) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.