Senior Software Developer

Once For All Limited; Basingstoke; On-site; GBP 50,000 - 70,000; Full time

Job summary

A rapidly growing SaaS company in Basingstoke is seeking a skilled developer to join their development team. You'll work on designing and implementing cloud-native microservices for a Supplier Risk Assessment platform on Microsoft Azure. Candidates must have strong C# and SQL Server skills, along with experience in REST APIs and DevOps practices. This role offers competitive benefits including private medical insurance, generous holiday allowance, and opportunities for professional development.

Benefits

Private Medical Insurance

Pension

25 days holiday + 8 bank holidays

Specsavers eye-care voucher

Free tea/coffee/fruit

Qualifications

• 5+ years commercial development experience required.
• Strong problem-solving and analytical skills needed.
• Hands-on experience with cloud-based infrastructure is necessary.

Responsibilities

• Design, build, and maintain cloud-native microservices and APIs.
• Lead high-availability system design hosted on Azure.
• Collaborate on translating technical requirements into solutions.
• Mentor developers through code reviews and technical guidance.

Skills

Strong C# expertise

Strong SQL Server expertise

Experience with REST APIs

Knowledge of Microsoft Azure

Problem-solving skills

Familiarity with DevOps practices

Education

Computer Science/Engineering degree

Tools

Docker

Kubernetes

Git

Job description

About Once For All

Once For All is a high-growth, cloud-based SaaS subscription business helping customers manage supply chain governance, risk, and compliance. We serve 250k+ customers across the UK in 20+ sectors, including construction, transport, retail, hospitality, education, property management, manufacturing, and government.

Role Summary

Join our rapidly growing Development team (10 Agile SCRUM teams) building and scaling a suite of microservices-based applications on Microsoft Azure. You’ll play a critical role in the design, implementation, and innovation of Once For All’s next-generation Supplier Risk Assessment platform, ensuring scalability, security, and reliability.

Key Responsibilities

• Design, build, and maintain cloud-native microservices and APIs using C#, .NET, and SQL Server.
• Lead the design and implementation of high-availability, high-scalability systems hosted on Azure.
• Collaborate with product owners and stakeholders to translate requirements into technical solutions.
• Champion clean code, object-oriented design, and software engineering best practices.
• Contribute to a DevOps culture: CI/CD pipelines, Git workflows, Docker, and Kubernetes.
• Mentor and support developers through code reviews and technical guidance.
• Stay ahead of emerging technologies (Cloud, Open Source, DevOps, API economy, Big Data) and bring innovation to the team.

Required Skills & Experience

• Strong C# and SQL Server expertise with proven track record of delivering robust applications.
• Solid experience with REST APIs and modern API design.
• Proven background in scalable system design and high-availability architectures.
• Hands‑on experience with Microsoft Azure and cloud‑based infrastructure.
• Strong problem‑solving and analytical skills with the ability to deliver under Agile methodologies.
• Deep knowledge of object-oriented programming, microservices, and message bus technologies.
• Familiarity with DevOps practices: Git, build pipelines, Docker, Kubernetes.
• 5+ years commercial development experience (Computer Science/Engineering degree preferred).

What We Offer

• Health & Wellbeing: Private Medical Insurance or wellness fund, 24/7 Employee Assistance Programme.
• Financial Benefits: Pension, Life Assurance (3x salary).
• Time Off: 25 days holiday + 8 bank holidays, holiday purchase scheme (+5 days), paid & unpaid volunteering days.
• Growth & Development: Ongoing CPD, team offsites, and company events.
• Everyday Perks: Specsavers eye‑care voucher, free tea/coffee/fruit in Basingstoke office.

Tech Stack You’ll Work With

C#, .NET, SQL Server, REST APIs, Microsoft Azure, Docker, Kubernetes, Git, CI/CD, Microservices, Message Bus