313 Lead Software Engineer Platform Connectivity Networking Chase Uk jobs in London

About BMLL

We are the leading independent provider of harmonized Level 3 historical data and analytics to the world’s most sophisticated capital market participants. BMLL offers banks, brokers, asset managers, hedge funds and global exchange groups immediate and flexible access to the most granular Level 3, T+1 order book data and advanced analytics, enabling them to accelerate research, optimize trading strategies and generate alpha at unparalleled speed and scale.

Our culture is inclusive and highly collaborative, with a flat management structure that empowers our employees to get involved in decision making as we continue to grow and scale.  We give all our employees share options so they participate in the growth and development of the business.

We offer a combination of remote and office (London based) working, weekly team lunches and plenty of office snacks!

For more information, please visit our website, or visit our Twitter, @bmlltech or LinkedIn, @BMLL.

About the Role

At BMLL we process terabytes of historical market data every day into suites of data products, which we then deliver to our customers.

This is an exciting opportunity for someone at or near the beginning of their career in technology to join us in the Data Distribution team. Our team owns the mechanisms that deliver data to customers, and ensures they’re robust, scalable and secure.

Our promise is that however a customer gets BMLL's data, they get it in the most efficient, cost-effective and timely manner possible, and the systems we build and maintain are responsible for keeping it. 

These systems are engineered to a high standard, using many technologies including Python, SQL, RDS/Postgres, Snowflake and Celery.

Your job will involve contributing to ongoing design and development, ensuring what we own stays efficient, precise, easy to understand, easy to operate, and free of errors. Our team is crucial to the success of BMLL's technology and commercial strategies.

Responsibilities

• Design and build solutions to distribute data to customers.
• Ensure 24/7 system reliability by implementing company and industry best practices.
• Implement workflow management software to automate operational tasks and optimize the utilisation of infrastructure and applications.
• Design and implement CI/CD workflows to maintain software quality via continuous and automated deployment and testing.
• Work hand-in-hand with product and operations teams.
• Review and assess tools that become available in the industry.

Requirements

Essential

• Degree in computer science or other STEM degree plus demonstrable computer science skill-set.
• 2+ years industry experience as a software engineer, or a data engineer leaning to software engineering.
• Good working knowledge of Python and SQL.
• Robust theoretical or practical understanding of concepts in distributed systems.
• Familiarity with Linux.
• Avid learner, problem solver and detail-orientation.
• Excellent communication skills.

Desirable

Experience with:

• Development using AWS (or other cloud provider’s) services.
• Snowflake, Databricks
• Working knowledge of admin-proximate tasks on a conventional RDBMS e.g., Postgres or Oracle query optimisation.
• C++, or C and Java

Benefits

• Competitive salary

• 25 days holiday plus bank holidays
• Discretionary Bonus 
• Pension Scheme
• Private Medical Insurance
• Work remotely abroad for up to 40 business days each year
• Life Insurance
• Combination of remote and London-based office working (2-3 days in office per week)
• A yearly Well being Physical Activity budget
• Continuous learning through funded training and challenging projects
• Collaborative culture
• Weekly team lunches
• Free Fruit, snacks, and drinks provided throughout the day (When office based)
• Regular Team Socials
• Cycle to Work Scheme

We are an inclusive employer and welcome applicants from all backgrounds. We pride ourselves on our commitment to Equality and Diversity. We are committed to removing barriers throughout our hiring process. If you have any special requirements or require reasonable adjustments to help you access career opportunities at BMLL, please do let us know

We are a fast-growing, FinTech company looking for a talented and enthusiastic Senior Software Engineer to join our team. We are expanding, making this a perfect position if you would like to have a significant impact on our company’s growth and develop your role and career as the business evolves. You will join a team where your ideas will be welcomed and valued, and who believe in doing high quality engineering.

We are about to undertake a large project to rebuild our entire platform, so this is exciting time to join to have real impact on the tech for years to come. We are looking for someone to take responsibility for designing and building large parts of our platform.

The role involves all aspects of the development lifecycle from design, implementation, and deployment. You need to be flexible and innovative and be able to handle large scale engineering challenges.

Role Responsibilities

• As a Senior Engineer, you will be responsible for enhancing and rebuilding the core onboarding platform, using your extensive experience of designing and engineering modern software applications following a microservices architecture.
• Champion code quality and thoughtful software design; it's essential to have a deep commitment to the quality of the code and software produced by you and the team.
• You will work with all stakeholders to analyse requirements to guide software architecture.
• Implement continuous integration and delivery to limit manual testing and troubleshooting.
• Ensure the DevOps concepts are used to deliver resilient, scalable and secure software.
• To produce accurate technical and non-technical documentation.
• You will coach and mentor more junior members of the team and work to build stronger coding and architectural disciplines in the team.

Our Tech Stack

We are in a process of evolving our tech stack, so this is not a definitive list, but a rough outline if what we currently have and what we want to adopt more.

• Our services are written in C#, live in GitHub, and deployed to Azure.
• We use Kubernetes and Helm charts for deployment with Terraform.
• Our frontend is built using a combination of Blazor for legacy applications, and Vue.js with TypeScript for new applications.
• We use Azure SQL for our relational data.
• Our architecture is - where appropriate - event-driven with Kafka.
• We perform integration testing with Cypress and Playwright.
• We monitor our systems using AppInsights, Grafana, and Zenduty.
• We ensure code quality with static code analysis using SonarCloud.

Requirements

We recognise that it's unlikely for anyone to possess every skill listed here. What's important is having as many as possible and a strong desire to learn the rest.

• Strong knowledge of C#, including object-oriented programming and SOLID design principles.
• Experience in VueJS with Typescript or similar frontend technology like React.
• MS SQL, T-SQL
• Experience designing event driven architecture with services such as Kafka.
• Experience with Azure Cloud Services, Kubernetes, and designing and developing continuous integration build, test and deployment environments using modern cloud-based tools and techniques.
• Experience with test-driven development.
• Experience working in Agile or Scrum teams, with an understanding of sprint planning, story points, and iterative development.
• Ability to take a pragmatic approach to coding and system design. Be able to choose solutions that balance quality and simplicity over perfectionism.
• Must be confident, self-motivated and able to methodically solve problems.
• Be used to working in a challenging and demanding environment where priorities can change at short notice.
• Possess very good verbal and written communication skills.

Benefits

• 25 days holiday (exc. Bank holidays)
• 5% Pension contributions
• Private medical insurance with Vitality
• Health cash Plan offering contributions to dental, optical and much more
• Enhanced Parental Leave
• Cycle to Work Scheme
• Monthly team lunches, quarterly company socials

We recognise the value of in person collaboration and operate a hybrid working model from our London office. Our teams work onsite 3 days a week (Tuesday to Thursday) and remotely for 2 days, providing flexibility alongside the benefits of working together. 

We’re hiring engineers who ship fast, build delightful products, and want to step into the arena in the fight against climate change.

We’re building the software infrastructure for the decarbonised energy system, backed by some of the best investors in the world (TechCrunch ).

We make the technology to move energy usage to times when electricity is cheap and green. Our software controls vehicle charging, heating systems, and home batteries. We use machine learning to figure out what energy people will need, and when they'll need it. We control tens of thousands of energy assets, and we’re growing quickly.

Read more about what we’re building here .

Requirements

You can expect:

• insane amounts of ownership
• hard technical challenges
• that what you build is commercially and environmentally valuable

In return, we ask for:

• the courage to build new things fast
• a commitment to real world impact over technical perfection
• a desire to help build and lead an exceptional and tight knit team
• deep-seated motivation to combat climate change

You shouldn't apply if:

• uncertainty scares you
• you aren't prepared to try, fail, and try again
• you're looking for a low intensity, low impact role

Interview process

1. Initial interview
2. Take-home exercise
3. Final interview (in-person)
4. Offer, references, and welcome to the team!

We use foundational models to create synthetic populations that represent real populations with 92% accuracy. Leading brands use these digital twins to test strategies, understand audiences, and make decisions in days rather than months - without the cost and delays of traditional market research.

Our platform spans 155 countries and 2 million synthetic personas. When a brand needs to understand how their target audience will respond to a new campaign, they get answers in seconds instead of weeks. Million-pound decisions are based on our results.

We've seen firsthand how crucial good insights are in high-pressure situations - our team has experience across campaigns, crisis response, and strategic operations where decisions have real consequences. Electric Twin is the tool we wish we'd had. That's why we built it.

You'll work across the full stack - from optimizing LLM inference pipelines to building B2B SaaS products. We value engineers who can take ownership of complex problems and collaborate effectively with world-class data scientists and domain experts.

Your responsibilities:

• Build Production Systems: Develop and maintain our Python-based platform that powers synthetic population simulations, working with PostgreSQL databases and deploying on Google Cloud Platform
• Deliver Client Impact: Create TypeScript/JavaScript B2B SaaS products that solve real business problems for major brands, working directly with product and commercial teams
• Ensure System Reliability: Implement monitoring, testing, and GitHub Actions CI/CD pipelines to maintain high availability for systems that influence million-pound business decisions
• Collaborate Across Disciplines: Partner closely with our data science team to translate research innovations into robust, scalable production systems
• Drive Technical Excellence: Contribute to engineering standards and systematic approaches as we scale our platform and grow the team
• Solve Diverse Challenges: Work across different technical domains - from optimizing data processing pipelines to building intuitive B2B SaaS experiences to ensuring system performance under high load

Environment:

• Small, focused team with direct access to leadership and clients
• Office-based culture (4-5 days per week) with frequent cross-team collaboration
• Results-driven environment where good engineering enables rapid business impact
• Opportunity to work with innovative brands and see the immediate impact of your work

This role suits engineers who thrive on variety and impact. If you prefer narrow specialization or lengthy planning cycles, this might not be the right fit. But if you want to solve challenging problems with immediate business consequences, let's talk.

Requirements

The engineering challenge is building systems reliable enough to power these high-stakes decisions. You'll work across data pipelines processing billions of tokens, real-time simulation platforms, and B2B SaaS products that make complex AI feel intuitive.

Essential:

• Strong software engineering fundamentals with experience in modern programming languages
• Proven track record of shipping production software and taking ownership of systems end-to-end
• Experience working collaboratively in cross-functional teams with diverse technical backgrounds
• Strong problem-solving skills with the ability to debug and optimize systems across different domains
• Excellent communication skills and genuine interest in understanding client and business needs
• Comfortable working in dynamic environments where business priorities drive technical decisions
• Willingness to work with our tech stack: Python (server-side), TypeScript/JavaScript (client-side), PostgreSQL, GitHub, and Google Cloud Platform

Desirable:

• Experience with Python, TypeScript/JavaScript, PostgreSQL, or Google Cloud Platform
• Background in building scalable systems, APIs, and data-intensive applications
• Familiarity with AI/ML systems, large language models, or high-throughput data processing
• Experience with GitHub Actions, CI/CD pipelines, monitoring, and observability
• Interest in market research, behavioral science, or business applications of AI

Benefits

• Competitive salary and equity package
• Opportunity to work on technology that influences major business and policy decisions
• Rapid professional growth in a scaling company with exceptional leadership
• Direct exposure to diverse industries and high-stakes decision-making
• Comprehensive benefits including health insurance, pension and holiday

INSTANDA is the worlds first no code platform for Insurance. A pioneering Insurtech, we’re revolutionising the insurance industry by offering insurers a versatile tool to create, manage, and distribute digital insurance products. Our innovative technology empowers insurance carriers to adapt swiftly to market demands and navigate the evolving landscape. Our Technology is consistently recognised as the best policy administration platform for innovative insurers, winning awards in both the UK and US.

INSTANDA has grown significantly in recent years and we are now a team of 200+ employees globally, with partnerships that operate worldwide. We’re continuing to grow our business and our DevOps team is at the forefront of our growth plans.

Follow us to learn more: Instanda.com  | LinkedIn  | Twitter  | YouTube

ABOUT THE TEAM

The Engineering Department is responsible for designing, developing, and testing the INSTANDA platform. All our applications are designed and developed in-house and hosted on Microsoft Azure.

INSTANDA is an innovative platform, where our engineers collaborate, develop, and test new features, using the latest technologies. The majority of our developers are full-stack, with some specialising in UI and databases. If performance or security are your thing you will a find a place for them here too!

ABOUT THE ROLE:

Reporting to a Dev Lead, we are looking to hire an experienced smart and technically savvy Software Engineer to join our growing Software Engineering team with a passion for software development and building great products to work on our platform. You will be working as part of an agile team, building an industry changing SaaS platform using the latest technologies.

This role is UK based, primarily remote working with some travel required to our London Office.

We are unable to provide sponsorship for this role.

What you will do:

• Develop and unit test software to a high standard.
• Collaborate with the wider development team to deliver customer solutions.
• Develop new features for our platform.
• Improve existing functionality.
• Consistently advocating high quality of code.

Requirements

Essential:

Technical Skills:

• C# .NET
• ASP .NET MVC
• LINQ and Entity Framework/LINQ to SQL
• Web-based languages such as HTML, CSS and JavaScript
• SQL Server
• Web APIs, e.g. REST
• Source control management, e.g. Git/ Azure/ Azure DevOps
• Unit tests, e.g. XUnit
• OOP ad SOLID principles

Behavioural Skills:

• Proactive self-starter, who can work with minimal supervision
• Excellent problem-solving skills
• Strong written and verbal communication skills
• Ability to multi-task and handle competing deadlines in a fast-paced dynamic environment.

Desirable:

• Familiarity with OWASP would be advantageous

Benefits

• Competitive salary
• Generous 28 days holiday allowance, in addition to public holidays.
• For every year of service you complete, we’ll give you an additional days holiday (max. 5 days)
• One Dynamic Day per month on top of your holiday allowance to spend time doing the things you want to do or simply catching up with life admin.
• Freedom Pass work up to 4 weeks of the year from anywhere.
• FlexiBank you decide when to use your public holiday allocation.
• Hybrid Working approach varying with the nature of your role.
• Life cover; income protection and participation in the company pension scheme
• All employees are included in the company discretionary bonus scheme
• £100 per month to put towards wellness activities.
• Annual learning & development allowance of £1,250
• Free access to LinkedIn learning and Microsoft ESI learning platform

Additional Information:

Our company was built by looking at the world through a different lens and our culture today reflects that by encouraging you to be yourself, speak your mind, and share your opinions. We want people who want to push themselves, be part of something great, and be prepared to challenge if they think there is a better way. Collaboration sits at the heart of how we operate, it has fueled our growth enormously and our aim to be ‘world class.

We want everyone to be the best they can be throughout our recruitment process; if you require any additional adjustments please let us know. Visit instanda.com/careers for more information

INSTANDA has an in-house recruitment team, which focuses on sourcing great candidates directly.  INSTANDA does not accept unsolicited resumes from agency or search firm recruiters.  Fees will not be paid in the event a candidate submitted by a recruiter without an agreement in place is hired.  When we do use agencies, we have a PSL in place, so please do not contact managers directly.

About Polaron

Polaron is a spin-out from Imperial College London, founded by Isaac Squires, Dr. Steve Kench, and Dr. Sam Cooper. The founders were united by their desire to harness engineering, artificial intelligence, and materials science to build the materials of the future.

Our mission is to become the world leaders at the interface between AI and materials. Through relentless dedication to innovation and pragmatism, we aim to support the next generation of advanced materials critical to building a more sustainable future.

Role Overview

You’ll be joining a team of four (CEO, CTO, Chief Scientist and Head of Engineering) as the first software engineer. This role grants you a significant degree of autonomy, and influence over the development and direction of the platform and product.

We’re building a SaaS product that will allow materials engineers to leverage cutting-edge AI in their work. Some of the things on our roadmap you’ll work on include:

• Building a robust cloud platform for scheduling the training and serving of bespoke AI models for our customers.
• A rich web-based image manipulation application for pre-processing image data that is used to train machine learning models.

Location

This is primarily an in-person role, with the team currently working from our East London office (a short walk from Old Street and Hoxton Overground) at least four days a week. At this early stage of the company’s development we currently favour collaboration in person, but we can discuss your preferences for working location as part of an application.

Our Commitment to Diversity

At Polaron, we are dedicated to building a diverse and inclusive team. We encourage you to apply, regardless of your past experience or background.

Technologies We Use

• Frontend/Backend: TypeScript with React/Next.js and Express/Prisma.
• Machine Learning: Python.
• Infrastructure: Docker, Kubernetes, Terraform (AWS).
• Database: PostgreSQL.
• CI/CD: Github, Github Actions.

Interview Process

Our interview process typically consists of the following stages:

1. Initial Video Call (20 mins): Discuss your experience and interest in the role with a member of the team.
2. Technical Pairing Exercise (1 hr): Collaborative coding session via video call, This is a chance to see how we work on an engineering problem together.
3. Behavioral Interview (45 mins):  In-person discussion with two team members in our office.
4. Paid Trial Day: This is a chance to spend the day in our office collaborating with the team on a real engineering task.

For any inquiries or requests for reasonable adjustments during the application process, please contact us at

Requirements

You should apply if

• You have 3+ years experience working as a product-focussed software engineer.
• Experience writing well-tested, maintainable code with a statically typed programming language (TypeScript, Go, Java/Scala, etc).
• A product-oriented mindset, comfortable engaging with customers, defining products, and owning feature delivery from start to finish.
• Comfortable working across the technology stack.

Benefits

The salary range for this position is £60,000-£75,000 GBP, and 0.1-0.5% equity, depending on experience and negotiated terms.