Senior Software Engineers - Full-stack

Internetwork Expert; London; On-site; GBP 65,000 - 85,000; Full time

Job summary

Simple Machines, a leading technology firm, is seeking a Senior Software Engineer in London. In this role, you'll develop cutting-edge software solutions, collaborate with clients and teams, and drive technical design of scalable backend systems. Join a forward-thinking environment where you can innovate and tackle complex technical challenges.

Qualifications

• Core foundation in programming, especially in JVM languages like Kotlin or Java.
• Past project experience with large scale webservices.
• Experience designing and implementing data-driven APIs.

Responsibilities

• Responsible for design and technical development of backend services for scalable platforms.
• Partner with client stakeholders to gather business requirements and translate them into technical requirements.
• Operate within an iterative delivery team using Agile practices.

Skills

Programming

Software Consulting

Data-driven API design

Frontend Development

Cloud Infrastructure

Unit and Integration Testing

Tools

Terraform

Docker

AWS

Kubernetes

Job description

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Senior Software Engineers - Full-stack, London

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Client:

Simple Machines

Location:

London, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

87a2df6cd216

Job Views:

3

Posted:

25.06.2025

Expiry Date:

09.08.2025

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Job Description:

Simple Machines is a leading independent boutique technology firm with a global presence, including teams in London, Sydney, San Francisco, and New Zealand. We specialise in creating technology solutions at the intersection of data, AI, machine learning, data engineering, and software engineering. Our mission is to help enterprises, technology companies, and governments better connect with and understand their organisations, their people, their customers, and citizens. We are a team of creative engineers and technologists dedicated to unleashing the potential of data in new and impactful ways. We design and build bespoke data platforms and unique software products, create and deploy intelligent systems, and bring engineering expertise to life by transforming data into actionable insights and tangible outcomes. We engineer data to life.

As a Senior Software Engineer at Simple Machines, you’ll be at the heart of groundbreaking projects, collaborating closely with both our talented internal team and forward-thinking clients. In this hands-on role, you'll drive the development of sophisticated, scalable solutions across the full technology stack—from intuitive frontends and robust backends to powerful data pipelines and resilient infrastructure. If you’re passionate about solving complex problems and pushing the boundaries of what’s possible, this role offers the perfect platform for you to make a real impact.

About our incredible team:

We believe diverse perspectives fuel innovation. Our team is made up of talented engineers from different backgrounds, each bringing unique strengths. We collaborate across the full stack, supporting and learning from one another to create world-class solutions. You'll have the autonomy to shape technical design, work closely with stakeholders, and engage with data scientists and cross-functional teams to craft seamless, high-performance systems.

We're committed to fostering an inclusive and equitable workplace where everyone—regardless of background, identity, or experience—can thrive. If you're passionate about pushing boundaries, solving complex challenges, and being part of a forward-thinking team, we want to hear from you!

Technical Responsibilities:

• Responsible for design and technical development of backend services for a highly scalable marketing platform.
• Responsible for designing the APIs, applications, and infrastructure the team develops, and documenting the technical requirements and design for the client.
• Responsible for end-to-end delivery and support, including build, automation, deployment, and operations, for everything that is developed.
• Partner with client stakeholders, and team members, to gather business requirements, collaborate on design decisions, and translate them into technical and design requirements.
• Operate within an iterative delivery team using Agile delivery tools and practices.
• Hybrid remote and in-person collaboration with the delivery team and client stakeholders.

Requirements

Technical background

• A consultative approach to software development. (Ideally experience in the Software Consulting space)
• Core foundation in programming, especially in JVM languages (particularly Kotlin or Java).
• Experience designing and implementing data-driven APIs.
• Exposure to frontend development (particularly React.js, Tailwind, REDUX, Typescript)
• Past project experience with large scale webservices.
• Cloud infrastructure experience with AWS and/or Google Cloud, Azure, etc.
• Infrastructure-as-code experience, such as with Terraform or Cloud Formation.
• In-depth experience with unit and integration testing, and test automation generally. Ideally TAA and/or BDD
• Experience working with SQL databases in the context of implementing data-driven APIs, and designing database schemas and queries to meet business requirements.
• A passion and proven background in picking up and adopting new technologies on the fly.
• Exposure to Scala, or functional programming generally.
• Exposure with highly concurrent, asynchronous backend technologies, such as Ktor, http4k, http4s, Play, RxJava, etc.
• Exposure with DynamoDB or similar NoSQL databases, such as Cassandra, HBase, BigTable, or Cosmos DB.
• Exposure with Git workflows, and the ability to tailor the workflow to project needs.
• Exposure with containerised application deployment using Docker, Amazon ECS, Kubernetes, etc.