Mid-Level Software Engineer (Java/ AWS)

The Role We're looking for a Mid-Level Software Engineer to join a team building and scaling a modern, enterprise-grade GenAI platform on AWS. This is a full-stack engineering role with a strong frontend focus, where you'll spend much of your time building intuitive, high-quality user experiences using React and TypeScript. You'll also develop backend services using ExpressJS, work with a large PostgreSQL database, and build cloud-native capabilities using AWS services including Lambda and S3. You'll be part of a team bringing AI-powered solutions into real-world enterprise environments, helping to build secure, scalable, and production-ready applications that solve meaningful business problems. What You'll Be Doing * Build modern, responsive web applications using React and TypeScript * Design scalable frontend architectures and reusable component libraries * Develop and maintain backend services using ExpressJS and Node.js * Work with a large PostgreSQL database to design, optimise, and manage data models * Build and integrate APIs across frontend and backend systems * Develop serverless functionality using AWS Lambda * Design and implement storage and data workflows using Amazon S3 * Contribute to the design and evolution of scalable cloud-native applications * Improve application performance, reliability, and maintainability * Implement monitoring, logging, and operational best practices * Troubleshoot issues across the full application stack * Apply secure coding principles and software engineering best practices * Collaborate with engineers, designers, product stakeholders, and AI specialists to deliver high-quality What We're Looking For * Strong experience building applications with React and TypeScript * Experience developing backend applications using Node.js and ExpressJS * Experience working with relational databases, ideally PostgreSQL * Understanding of API design and integration * Experience building and deploying applications in AWS environments * Familiarity with AWS Lambda and serverless architectures * Experience working with object storage services such as Amazon S3 * Strong software engineering fundamentals and problem-solving skills * Understanding of modern web application architecture and design patterns * Experience working within Agile software delivery teams * Strong communication and collaboration skills Nice to Have * Experience developing AI-enabled or data-driven applications * Experience with AWS services beyond Lambda and S3 * Familiarity with Infrastructure as Code approaches * Experience with CI/CD pipelines and automated deployment processes * Experience with monitoring and observability tooling * Understanding of cloud security principles and best practices * Experience working in consulting or client-facing environments * Exposure to event-driven or distributed system architectures Please note: We offer flexible hybrid working, but candidates should be based in Northern Ireland and able to attend our Belfast office when required. Why Join Instil? At Instil, we believe great work starts with happy, motivated people. That’s why we’ve built a benefits package that supports your wellbeing, growth, and life outside of work, because when you thrive, so do we. * Recognition That Matters: A discretionary annual performance bonus that rewards your impact and contribution to our success. * Flexibility Built In: Flexible working arrangements and summer hours, because life isn’t 9 to 5, and balance matters. * Financial Security: A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind. * Health & Wellbeing: Employee Assistance Programme, mental health support, cycle-to-work scheme, and regular social events to keep our culture vibrant. * Time to Recharge: 35 days holiday, enhanced maternity pay, and family-first policies so you can focus on what matters most. * Learning Never Stops: From courses to certifications, we’ll invest in your development so you can keep growing and shaping what’s next. * Community & Culture: Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace. And that’s just the start, drop us a note to find out more. Company Description Instil has been delivering world-class software engineering and technology solutions for over 20 years, trusted by global brands to solve complex challenges and drive innovation. From modernising legacy systems to building cutting-edge applications, we help our clients navigate an ever-changing digital landscape with confidence and agility. We’re proud to be an award-winning employer, reflecting how our people are at the heart of everything we do: * Recognised as a Great Place to Work® for three consecutive years, and in 2024 ranked in the Top 20 Best Workplaces in the UK for medium-sized companies. * Winner of Company of the Year at the Digital DNA Awards 2022, celebrating excellence in Northern Ireland’s tech sector. Driven by a love for technology and a commitment to excellence, we bring together people who want to make a difference. We’ll support your journey, because your success is part of ours. #LI-PR1 #InstilCareers

The Role We're looking for a Mid-Level .NET Software Engineer to help build and evolve modern cloud-native applications used by enterprise customers. This is a hands-on software engineering role where you'll work across backend services, cloud infrastructure, APIs, and data platforms to deliver secure, scalable, and reliable solutions. You'll collaborate closely with experienced engineers, product stakeholders, and cross-functional teams to solve complex technical challenges while continuing to develop your own skills and expertise. You'll have the opportunity to work with modern .NET technologies, cloud platforms, serverless architectures, and distributed systems in an environment that values engineering quality, continuous learning, and collaboration. What You'll Be Doing * Develop and maintain applications using .NET and C# * Build scalable backend services and APIs that support enterprise applications * Contribute to technical design discussions and solution architecture * Develop cloud-native solutions using AWS and serverless technologies * Work with NoSQL databases to design and manage scalable data models * Collaborate with frontend, product, and platform teams to deliver high-quality software * Write clean, maintainable, and well-tested code * Troubleshoot and resolve issues across application and cloud infrastructure layers * Contribute to CI/CD pipelines and software delivery processes * Support application performance, reliability, and operational excellence * Participate in code reviews and share knowledge with the wider engineering team What We're Looking For * 2–5 years of commercial software engineering experience * Strong experience developing applications using .NET and C# * Experience working with cloud platforms (AWS preferred, Azure or GCP also considered) * Exposure to serverless architectures such as AWS Lambda * Experience working with NoSQL databases such as DynamoDB or MongoDB * Good understanding of software design principles and modern development practices * Strong problem-solving skills and a collaborative mindset * Ability to communicate effectively with both technical and non-technical stakeholders Nice to Have * Experience with frontend technologies such as React, Angular, or Vue * Experience building and consuming REST APIs * Familiarity with CI/CD pipelines and DevOps practices * Understanding of microservices and distributed systems * Experience with containerisation technologies such as Docker and Kubernetes * Exposure to infrastructure-as-code and cloud automation * Experience working within Agile delivery environments Please note: We offer flexible hybrid working, but candidates should be based in Northern Ireland and able to attend our Belfast office when required. Why Join Instil? At Instil, we believe great work starts with happy, motivated people. That’s why we’ve built a benefits package that supports your wellbeing, growth, and life outside of work, because when you thrive, so do we. * Recognition That Matters: A discretionary annual performance bonus that rewards your impact and contribution to our success. * Flexibility Built In: Flexible working arrangements and summer hours, because life isn’t 9 to 5, and balance matters. * Financial Security: A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind. * Health & Wellbeing: Employee Assistance Programme, mental health support, cycle-to-work scheme, and regular social events to keep our culture vibrant. * Time to Recharge: 35 days holiday, enhanced maternity pay, and family-first policies so you can focus on what matters most. * Learning Never Stops: From courses to certifications, we’ll invest in your development so you can keep growing and shaping what’s next. * Community & Culture: Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace. And that’s just the start, drop us a note to find out more. Company Description Instil has been delivering world-class software engineering and technology solutions for over 20 years, trusted by global brands to solve complex challenges and drive innovation. From modernising legacy systems to building cutting-edge applications, we help our clients navigate an ever-changing digital landscape with confidence and agility. We’re proud to be an award-winning employer, reflecting how our people are at the heart of everything we do: * Recognised as a Great Place to Work® for three consecutive years, and in 2024 ranked in the Top 20 Best Workplaces in the UK for medium-sized companies. * Winner of Company of the Year at the Digital DNA Awards 2022, celebrating excellence in Northern Ireland’s tech sector. Driven by a love for technology and a commitment to excellence, we bring together people who want to make a difference. We’ll support your journey, because your success is part of ours. #LI-PR1 #InstilCareers