Key Responsibilities:

• Work independently on our Kafka services to integrate new sources and clients. We use Kafka to deliver near real-time data to our machine learning models, other teams, and directly to customers.

• Deploy and manage our cloud-native services using strong AWS knowledge and Infrastructure as  Code principles.

• Help operate and monitor the performance of our production services and platform.

• Enhance our high-performance APIs which utilise FastAPI to serve machine learning insights.

• Implement robust testing frameworks and system designs to maintain high code quality and service reliability.

• Use AI throughout the software development lifecycle – we are continually evolving our working practices in this area, while ensuring systems remain reliable and maintainable.

Your Experience: 

• Extensive professional experience in Python backend development, including building and maintaining highly available backend services (FastAPI preferred) at scale.

• Proven ability to design, build, and maintain data-intensive applications and infrastructure.

• Deep understanding of AWS services and hands-on experience with Infrastructure as Code (we use AWS CDK) and containerization (we use Docker and AWS ECS).

• Experience with Kafka.

 Nice to Have:

• Experience working alongside data scientists in the “PyData” ecosystem (Numpy, Pandas)

• Familiarity with some of the other tools in our stack: Redis, Postgres, Airflow, Spark

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We’re working with an industry leading energy company that are looking for an extremely proficient C++ Developer to join them for a long term project.

This person will be tasked with working alongside their existing engineering team and working on an ongoing transformation.

This role will fall inside IR35 and will require travel to the office 3 days per week in Central London.

Key Skills and Experience required

•     5+ years post-graduation professional C++ software development experience within the Financial industry

•     Solid understanding of parallel, asynchronous, and multithreaded programming to build distributed systems

•     Good knowledge of algorithms and data structures

•     Strong analytical and problem-solving skills, with the ability to analyze complex data sets and propose innovative solutions.

•     Understanding of trading lifecycle, including order capture & execution, allocation workflow, settlement, and compliance requirements

•     Must have strong technical skills in scripting, Python, PowerShell, C#, SQL or other programming languages

•     Solid track record in application deployment best practices

•     Proactive system monitoring and troubleshooting, owning reliability improvements and ensuring their successful delivery

If you’re available in the next few weeks then please apply here!

C++ Developer – London – £750-850/day

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Location: UK (Hybrid / Remote – clearance dependent)
Security Clearance: SC or DV required
Engagement: Contract (Inside IR35)
Sector: Public Sector / Defence / National Infrastructure

The Role

We are working with a secure public-sector programme delivering mission-critical digital services used at national scale.
They are looking for an experienced Software Engineer / Developer with strong cloud-native engineering skills to design, build, and operate modern systems in highly regulated environments.

This is a hands-on engineering role — you will be writing production code, working closely with infrastructure, and contributing across the full delivery lifecycle.

Please note: Due to the nature of the work, active SC or DV clearance is mandatory.

What You’ll Be Doing

• Designing and building cloud-native applications on AWS

• Developing backend services and APIs, primarily in Python

• Defining and maintaining infrastructure using Terraform

• Working across the full SDLC: design, build, test, deploy, and operate

• Collaborating with product, platform, and security teams in agile delivery

• Supporting secure, scalable, and resilient systems in production

• Contributing to CI/CD pipelines and operational best practices

• Working on systems that matter — national services, defence, or critical infrastructure

Essential Skills & Experience

• Active SC or DV clearance (non-negotiable)

• Strong experience as a Software Engineer / Developer

• AWS (e.g. Lambda, ECS/EKS, EC2, S3, RDS, API Gateway)

• Python used in production environments

• Terraform (infrastructure as code)

• Experience building APIs and backend services

• Familiarity with CI/CD pipelines and cloud deployment

• Comfortable working in secure or regulated environments

Nice to Have

• Experience with FastAPI, Flask, Django, or similar frameworks

• Exposure to frontend technologies (React, Next.js, Angular)

• Experience with containerisation (Docker, Kubernetes)

• Background in public sector, defence, or government programmes

• Understanding of DevSecOps and cloud security best practices

• Experience supporting live services at scale

What’s on Offer

• Work on high-impact, nationally significant systems

• Modern cloud and engineering practices

• Highly skilled, clearance-holding engineering teams

• Flexible working arrangements (where clearance allows)

• Competitive day rate or salary (dependent on clearance and experience)

Eligibility

Due to the security requirements of this role, applicants must already hold active SC, SC Enhanced or DV clearance. Unfortunately, we cannot sponsor clearance for this position.

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Permanent role

Overview

We are seeking a Senior DealCloud Specialist to join a high-performing investment environment following the completion of one of a large DealCloud implementation. This hire will play a critical role in supporting, optimising and evolving the platform, working across both strategic initiatives and ongoing BAU.

This is an opportunity for a senior, hands-on platform specialist to take ownership and act as a subject matter expert.

Key Responsibilities

• Lead and support strategic DealCloud enhancement projects

• Manage and optimise BAU platform performance and user experience

• Configure, customise and enhance DealCloud to meet evolving business needs

• Partner with senior stakeholders across investment and operational teams

• Identify process improvements and implement scalable solutions

• Support data integrity, reporting and workflow optimisation

• Work closely with the existing in-house DealCloud specialist to strengthen platform capability

Required Experience

• Minimum 2 years’ hands-on DealCloud experience

• Strong platform knowledge including configuration, implementation and optimisation

• Experience delivering or supporting medium-to-large scale DealCloud implementations

• Ability to operate as a senior SME and engage confidently with stakeholders

Preferred Background

• Consultancy background with exposure to multiple DealCloud projects

• In-house DealCloud implementation experience within Private Equity or Venture Capital

• Experience supporting post-implementation optimisation in an investment environment

Candidate Profile

• Senior, credible and commercially aware

• Strong problem-solving and solution design capability

• Comfortable operating both strategically and hands-on

• Proactive and able to work in a lean, high-impact team

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**Please note – you must have previous experience working with payments to be considered for this/this role does not offer sponsorship***

A London based fintech/payments client are doubling their global tech offering and embarking on an exciting rebrand; working with the Director of Engineering (50% hands-on/50% technical & strategic) you will have the opportunity to lead and scale 1 or more of their platform/product engineering teams. You will be a pivotal figure in the further development and scaling of their new FX/payments platform as well as launching a new range of fintech products.

Whilst the team are working in Python, this is by no means essential to be considered – the chief importance is that you have worked with payments technologies and understand associated principles/nuances of the industry. If you are a strong lead engineer/hands-on engineering manager, we would love to hear from you:

Role overview:

• 50/50 hands-on and technical/people leadership of one/multiple core engineering teams
• Working with engineers to uphold and define scalable long-term platform architecture
• Leading and mentoring skilled teams of 3-5 engineers / helping with scaling & interviews where necessary
• Lead from the front and foster a culture of accountability, extreme ownership

Technical experience:

• Payments experience essential
• Python nice to have but other backend languages considered
• Cloud services and CICD

Salary and benefits: Up to £120k & 15% bonus

Please note – this role will require 4 days per week in office/onsite in London.

Interview process: 3 stages then offer (x1 technical interview – 1 peer review/team meeting – 1 meeting with Engineering Director – offer)

If this is of interest – please drop me an email with your CV and we can schedule a call

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***Please note – you must have previous experience working with payments to be considered for this/this role does not offer sponsorship***

A London based fintech/payments client are doubling their global tech offering and embarking on an exciting rebrand; looking for a Technical Lead/Hands-on Engineering Manager to facilitate the growth and development of their software engineering teams. You will be specifically working to scale and improve their new payments platform as well as launching a new range of fintech products.

Whilst the team are working in Python, this is by no means essential to be considered – the chief importance is that you have worked with payments technologies and understand associated principles/nuances of the industry. If you are a strong lead engineer/hands-on engineering manager, we would love to hear from you:

Role overview:

• 50/50 hands-on and technical/people leadership
• Working with engineers to uphold and define scalable long-term platform architecture
• Leading and mentoring skilled team of 3-5 engineers / helping with scaling & interviews where necessary
• Lead from the front and foster a culture of accountability, extreme ownership

Technical experience:

• Payments experience essential
• Python nice to have but other backend languages considered
• Cloud services and CICD

Salary and benefits: Up to £120k & 15% bonus

Please note – this role will require 4 days per week in office/onsite in London.

Interview process: 3 stages then offer (x1 technical interview – 1 peer review/team meeting – 1 meeting with Engineering Director – offer)

If this is of interest – please drop me an email with your CV and we can schedule a call

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Please note: This role is primarily remote, with the expectation of being in the office one day per week. Candidates must be eligible to work in the UK without sponsorship.

La Fosse has partnered with an established business to hire a full stack developer to join a dynamic, collaborative engineering team focused on building modern, scalable digital solutions. The team is UK-based, comprising around 80 professionals working in a product-driven environment, with the role reporting directly to an engineering team lead.

This is an exciting opportunity for a mid level developer who is passionate about creating intuitive, high-quality user interfaces while also contributing to backend services and shaping the overall architecture of digital products.

Key Requirements

• Frontend: Proficient in JavaScript / TypeScript however experience with React Next.js or React Native a plus)
• Backend: Experience with C# (.NET) however experience with Node.js, Golang, or Java will be considered
• Experience working in an Agile environment
• Understanding of relational databases and object-oriented principles
• Knowledge of modern software architecture and design patterns
• Cloud and DevOps: Familiarity with Azure services (Functions, API Management), CI/CD pipelines, Docker, Terraform
• Testing: Experience with testing frameworks such as NUnit or JUnit
• Comfortable working in Agile teams and using tools like Jira and Confluence
• Experience with Git

Interview Process:

1st stage: Technical Assessment

2nd stage: Teams interview

3rd Stage: In person Interview

If this role is of interest please follow the link to apply

r 

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Location: Remote

The Role

Currently on the lookout for a Senior Web Developer with strong WordPress experience to join a fast paced, modern engineering team. You’ll collaborate closely with Project Managers and fellow Developers to architect, build, and maintain secure, performant digital platforms.

This role is ideal for a developer who enjoys solving complex technical challenges, takes ownership of their work, and contributes to raising engineering standards across the team. You’ll play a key part in mentoring others, guiding technical decisions, and supporting cross‑project collaboration.

What You’ll Do

• Build and maintain high‑quality, secure, and scalable WordPress‑based digital products
• Architect features, components, and systems at a project level
• Provide code reviews and mentorship to other engineers
• Develop custom Gutenberg blocks and components
• Troubleshoot and debug issues effectively
• Identify and address performance, security, and maintainability improvements
• Contribute to architectural decisions and technical documentation
• Collaborate with designers to turn static designs into reusable, flexible components
• Participate professionally in client meetings and technical discussions
• Estimate development tasks (training provided)
• Manage your workload across multiple concurrent tasks

What We’re Looking For

You don’t need every item, but you’ll thrive if you have most of the following:

• 4–5 years of professional WordPress development experience
• Strong PHP and/or JavaScript skills
• Familiarity with modern web development (vanilla JS, React, or similar frameworks)
• Hands‑on experience with Gutenberg and custom block development
• Strong debugging skills
• Good understanding of MySQL and database‑driven applications
• Experience working with RESTful APIs
• Awareness of performance and security best practices
• Ability to clearly communicate with technical and non‑technical stakeholders
• Strong organisational skills with the ability to juggle multiple tasks

What’s in It for You

• £500 annual training budget for professional development and conferences
• Remote‑first working
• Supportive, positive team environment
• Dedicated learning and development time
• Employee Assistance Programme
• Discounts via a corporate rewards platform (restaurants, cinema, retail)
• High‑quality Apple equipment provided

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Remote first team

We’re looking for an experienced Full Stack WordPress Engineer to join a high-performing, distributed development team delivering new features, functionality and ongoing improvements across enterprise-level WordPress platforms.

You’ll primarily focus on a large-scale, high-traffic digital news platform, while also contributing to shared services and tools that support multiple well-known media brands.

The Role

You’ll be part of an established and collaborative technology team where innovation is encouraged and good ideas move quickly. The environment is dynamic and adaptable, giving you the freedom to build purposeful, high-impact software without unnecessary bureaucracy.

You will:

• Develop and maintain features for an enterprise-scale WordPress platform

• Build and maintain shared plugins used across multiple WordPress properties

• Develop microservices and JavaScript applications that integrate alongside WordPress

• Optimise performance, improving response times, database queries and Core Web Vitals

• Contribute to architectural and technology decisions with a focus on scalability and maintainability

• Independently manage workload in a fast-paced environment

• Debug and resolve issues raised by editorial and support teams

What We’re Looking For

Essential Experience

• 8+ years’ experience in WordPress development

• Strong expertise in the WordPress and Gutenberg ecosystem

• Experience building custom Gutenberg blocks, RSS feeds and WP-JSON API endpoints

• Advanced HTML, CSS and PHP skills with a focus on performance

• Strong front-end JavaScript experience, including React

• Solid understanding of Git and version control best practices

• Experience working within Agile environments (e.g., JIRA)

• Ability to deliver full-stack projects independently from concept to deployment

• Strong understanding of Core Web Vitals and website performance optimisation

• Confident communicator within distributed teams

• Strong debugging skills, including Chrome DevTools

• A proactive, solutions-focused mindset

Desirable Experience

• WordPress VIP platform experience

• Building WordPress at enterprise scale (caching, query optimisation, WP Cron)

• Monitoring tools such as New Relic or Kibana

• TypeScript and Webpack

• WP-CLI and custom command creation

• AWS services (S3, Lambda, EC2, API Gateway)

• Publishing to Apple News

• CI tools such as CircleCI, GitHub Actions or TeamCity

• Writing ad-hoc Bash or Python scripts

• Subscription platform integrations (e.g., Piano, Zephr)

• Willingness to travel to London occasionally for team meet-ups

Why Apply?

• Work on high-traffic, enterprise-level platforms

• Join a collaborative and forward-thinking technology team

• Influence architecture and performance at scale

• Enjoy flexibility within a hybrid working model

If you’re an experienced WordPress developer who enjoys building scalable, high-performance digital products, we’d love to hear from you.

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We’re looking for a talented Python Engineer to join a centralized engineering team focused on building shared capabilities that power multiple product teams.

This is a high-impact role where you’ll design and deliver reusable frameworks, libraries, and microservices that support scalable, high-performing products across a distributed engineering organisation.

The Role

As part of a central engineering function, you’ll design and build common libraries and microservices used by multiple product teams. You’ll collaborate directly with engineers across several time zones, requiring strong communication skills and the ability to work effectively in an asynchronous environment.

Your initial focus will be:

• Abstracting and consolidating existing product code into a shared Python library

• Leveraging PySpark and DataFrames for scalable data processing

• Building Python-based Azure Functions (microservices)

• Establishing architectural patterns that support reuse, scalability, and performance

Following the initial phase, you’ll continue to act as an extension of product teams—designing and delivering shared microservices and libraries that address common technical needs across the organisation.

What You’ll Bring

Required Skills & Experience:

• Strong Python development experience

• Hands-on experience with PySpark

• Solid SQL knowledge

• Experience working with Azure infrastructure

• Understanding of containers, microservices architecture, and functional design patterns

• Experience working in Agile environments

• Experience with Terraform

• Experience writing and maintaining unit tests (preferably with PyTest)

Nice to Have:

• HTML/CSS knowledge

What We’re Looking For

• Strong architectural thinking and the ability to work independently

• Clear and confident communicator across technical audiences

• Comfortable working asynchronously across multiple time zones

• Pragmatic problem-solver who can deliver at pace

• Passion for building reusable, high-quality engineering solutions

2 Stage interview process 

3 days onsite – Central London

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We’re looking for a hands-on Java Software Engineering Manager to lead a high-performing team building reliable, scalable systems. You’ll balance technical leadership with people management, setting clear direction while staying close enough to the code to guide architecture and best practices.

Ideally you will have managed teams working with Java and modern backend technologies, a proven track record of leading engineers, and a pragmatic, calm approach to problem-solving. Any E-commerce experince would also be highly advantageous.

Technical Requirements

• Strong commercial experience with Java/managing JVM engineers
• Promote DevOps (build/run it) methodology and practices
• Experience designing and delivering microservices-based architectures
• Solid understanding of CI/CD pipelines, including build automation, testing, and deployment
• Familiarity with modern engineering practices: automated testing, infrastructure as code, monitoring, and observability

Technology Stack

• Backend development across modern JVM frameworks including Spring, Spring Boot, and Micronaut, primarily using Java
• Cloud-native services deployed on Azure, with orchestration via Kubernetes and system monitoring/observability using tools such as Dynatrace
• Data persistence and storage using a mix of relational and NoSQL technologies, including SQL Server and MongoDB
• Frontend applications built with contemporary JavaScript frameworks and languages such as React, Next.js, Angular, and TypeScript
• In-memory data grids and caching solutions leveraging technologies like Redis and Ignite

If of interest, please apply with your updated CV and we can arrange a call.

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A fast-growing, tech-first climate company is looking for a Lead Full Stack Engineer to join its core engineering team and help shape the future of clean home energy in the UK. This is a hands-on leadership role. You’ll still write meaningful amounts of code, while also setting technical direction, mentoring engineers, and working closely with product and design to ensure the right things are built at the right time. The team values strong engineering fundamentals, pragmatic decision-making, and real ownership. You’ll be joining a small, highly skilled group solving non-trivial, real-world problems that blend software, hardware, and physical constraints.

What you’ll be doing

• Owning architecture and technical strategy for a core product domain
• Designing and building complex, cross-cutting full-stack solutions
• Writing high-leverage code across critical paths and foundational systems
• Identifying scaling risks, bottlenecks, and technical debt and driving solutions
• Mentoring engineers and developing technical leadership within the team
• Improving team processes, collaboration, and overall engineering quality

You don’t need experience with everything below, but you should have an appetite for full-stack ownership:

• TypeScript, JavaScript
• React, Tailwind, Konva
• Node.js, Prisma
• PostgreSQL, PostGIS
• Docker, Docker Compose

Essential experience

• Strong experience with modern JavaScript / TypeScript
• Full stack development experience (frontend, backend, APIs)
• Relational databases and data modelling
• Solving ambiguous, real-world problems end to end
• Mentoring others or contributing to healthy engineering teams

More importantly, you are

• Product-minded and curious about real user problems
• Impact-driven, balancing quality with momentum
• Comfortable with ownership and accountability

What’s on offer

• Competitive salary plus meaningful equity (options)
• 33 days holiday + up to 30 days working abroad per year
• Hybrid working (minimum 2 days per week in London or Bristol)
• Fortnightly full-team meetups with paid travel, accommodation, and dinner
• Workplace Nursery Benefit (YellowNest)
• Cycle to Work scheme
• A close-knit team, strong engineering culture, and huge scope for growth

If this role sounds of interest, please reply with your updated CV and I’ll be happy to share more details.

Lead Full Stack Engineer | Up to £120k + Equity | Hybrid (London or Bristol)

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