Senior Backend Kotlin Engineer 6 month contract initially Outside IR35, Fully remote role (UK) An established consumer-facing technology business is looking for a Senior Backend Engineer to support the continued evolution of high-scale Back End services used by a large international user base. This role would suit an experienced contractor who is comfortable working in Kotlin-heavy Back End environments, can operate with autonomy, and is confident helping teams move from Legacy systems toward more modern, cloud-native services. The role You will be involved in designing, building, and improving reliable Back End services, working closely with product, mobile, platform, and engineering teams. The environment is fast-moving, product-focused, and requires someone who can turn ambiguous requirements into clear technical direction. Key experience Strong Back End engineering experience with Kotlin Hands-on experience with Google Cloud Platform Background in scalable, production-grade systems Experience in consumer-facing, mobile-first, or high-traffic product environments Ability to lead technical work from discovery through delivery Strong communication and ownership mindset
12/05/2026
Contractor
Senior Backend Kotlin Engineer 6 month contract initially Outside IR35, Fully remote role (UK) An established consumer-facing technology business is looking for a Senior Backend Engineer to support the continued evolution of high-scale Back End services used by a large international user base. This role would suit an experienced contractor who is comfortable working in Kotlin-heavy Back End environments, can operate with autonomy, and is confident helping teams move from Legacy systems toward more modern, cloud-native services. The role You will be involved in designing, building, and improving reliable Back End services, working closely with product, mobile, platform, and engineering teams. The environment is fast-moving, product-focused, and requires someone who can turn ambiguous requirements into clear technical direction. Key experience Strong Back End engineering experience with Kotlin Hands-on experience with Google Cloud Platform Background in scalable, production-grade systems Experience in consumer-facing, mobile-first, or high-traffic product environments Ability to lead technical work from discovery through delivery Strong communication and ownership mindset
Senior Backend Engineer | Kotlin/Golang/GCP 6-month contract | Outside IR35 Remote First - Occasional London based office visits Up to £500 per day An established consumer-facing technology business is looking for a Senior Backend Engineer to support the continued evolution of high-scale Back End services used by a large international user base. This role would suit an experienced contractor who is comfortable working in Kotlin-heavy Back End environments, can operate with autonomy, and is confident helping teams move from Legacy systems toward more modern, cloud-native services. The role You will be involved in designing, building, and improving reliable Back End services, working closely with product, mobile, platform, and engineering teams. The environment is fast-moving, product-focused, and requires someone who can turn ambiguous requirements into clear technical direction. Key experience Strong Back End engineering experience with Kotlin Hands-on experience with Google Cloud Platform Background in scalable, production-grade systems Experience in consumer-facing, mobile-first, or high-traffic product environments Ability to lead technical work from discovery through delivery Strong communication and ownership mindset Useful additional experience PHP exposure, especially within Legacy or hybrid environments Golang exposure Experience supporting Legacy-to-modern platform transitions Cloud architecture, observability, reliability, and cost optimisation Mentoring or helping teams adopt modern Back End practices
11/05/2026
Contractor
Senior Backend Engineer | Kotlin/Golang/GCP 6-month contract | Outside IR35 Remote First - Occasional London based office visits Up to £500 per day An established consumer-facing technology business is looking for a Senior Backend Engineer to support the continued evolution of high-scale Back End services used by a large international user base. This role would suit an experienced contractor who is comfortable working in Kotlin-heavy Back End environments, can operate with autonomy, and is confident helping teams move from Legacy systems toward more modern, cloud-native services. The role You will be involved in designing, building, and improving reliable Back End services, working closely with product, mobile, platform, and engineering teams. The environment is fast-moving, product-focused, and requires someone who can turn ambiguous requirements into clear technical direction. Key experience Strong Back End engineering experience with Kotlin Hands-on experience with Google Cloud Platform Background in scalable, production-grade systems Experience in consumer-facing, mobile-first, or high-traffic product environments Ability to lead technical work from discovery through delivery Strong communication and ownership mindset Useful additional experience PHP exposure, especially within Legacy or hybrid environments Golang exposure Experience supporting Legacy-to-modern platform transitions Cloud architecture, observability, reliability, and cost optimisation Mentoring or helping teams adopt modern Back End practices
