Responsibilities
- Research and analyse trading outcomes to assess effectiveness of execution strategies
- Build and refine quantitative models to improve algorithmic trading performance
- Implement elements of trading logic in Python and work closely with engineering teams
- Partner with clients to explain model behaviour, review performance and gather feedback
- Support clients in an execution consulting capacity to optimise use of trading products
Key Skills & Experience
- Strong quantitative mindset with passion for data and research
- Strong Python development skills (Java exposure beneficial but not core)
- Experience with electronic trading strategies and market microstructure
- Knowledge of European equities markets
- Exposure to distributed systems and large-scale data analysis desirable
- Excellent communication skills; able to work with global teams and clients
- High-frequency trading experience advantageous
Permanent role - Central London based - hybrid working
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White Collar Factory (95009), United Kingdom, London, LondonLead Software Development Engineer - Services
About this role
Capital One’s mission is to change banking for good by bringing humanity, ingenuity and simplicity to banking. Sitting at the core of such values is our Software Engineering department whose primary role is to be an enabler of our ambitions.
Capital One is looking for a Senior Software Development Engineer to join a backend team, based in our London office on a hybrid basis.
Our Engineers are people who lead by example, build strong and valuable relationships and have the confidence to influence at all levels. We are proud of who we are and what we do and want you to join us at this particularly exciting time at Capital One.
What you’ll do
- You will lead a team or cross-functional squad in the delivery of complex and ambiguous projects that support a broader business outcome
- You will take end-to-end responsibility for technical design, implementation, and operational considerations
- Collaborate with engineers, architects, product owners, and stakeholders to ensure successful project outcomes
- You will play a crucial role in supporting the elevation of engineering enablement, excellence, and experience across the broader engineering community
- You will collaborate and contribute to the development and dissemination of standardised and sustainable best practices, tools, patterns, and frameworks that enhance the productivity and quality of engineering efforts business-wide
- Your focus is on a major portion of existing or new team software (e.g., significant component, set of features, mid-size application or service)
- You’ll work to achieve the goals and vision shared by Product Management and your Tribe Leadership
- Innovate within your team, initiative area and contribute within your technical domain
What we’re looking for
- Proven experience in technical leadership, including leading a team or cross-functional squad
- Proven experience working in both backend services and mobile technologies
- Exceptional programming skills and knowledge of building APIs using modern OO languages preferably Java, SOLID principles, SOA, HTTP and REST
- Experience with AWS and strong understanding of cloud-based development
- Extensive, demonstrable knowledge of designing architectures that are secure and perform at scale
- You’re able to effectively communicate and work collaboratively across engineering to maximise inner-sourcing opportunities and reduce waste
- Proven experience ability to deliver high quality applications at scale
- An advocate for quality and the ability to support the team, leveraging approaches such as Pair Programming, TDD and BDD
Where and how you’ll work
This is a permanent position and will be based in our London office.
We have a hybrid working model which gives you flexibility to work from our offices and from home.
We’re big on collaboration and connection, so you’ll be based in our London office 3 days a week on Tuesdays, Wednesdays and Thursdays.
What’s in it for you
- Bring us all this - and you’ll be handsomely rewarded with a role contributing to the product roadmap for an organisation committed to transformation
- We’re continuing our journey into the public cloud and have problems of scale, security, availability and performance for you to help solve
- We love continuous learning and that’s why we give you 10% of your time to work on cutting edge innovative projects that shape the way we will work in the future
- We offer high performers strong and diverse career progression, investing heavily in developing great people through our Capital One University training programmes (and appropriate external providers)
- Immediate access to our core benefits including pension scheme, bonus, generous holiday entitlement and private medical insurance - with flexible benefits available including season-ticket loans, cycle to work scheme and enhanced parental leave
- Open-plan workspaces and facilities designed to inspire and support you. Our Nottingham head-office has a fully-serviced gym, subsidised restaurant, mindfulness and music rooms. In London, you can heighten your mood with a run on our rooftop running track or an espresso at the Workshop Coffee café
What you should know about how we recruit
We are committed to creating a level playing field and seek to create teams that are representative of our customers and the communities we serve. We’d love to hear from you if you identify with a typically under-represented group in our industry and are particularly keen to hear from women and ethnic minority candidates.
We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it’s about what you do, not just what you say. That’s why we make our recruitment process fair and accessible. And we offer benefits that attract people at all ages and stages.
We also partner with organisations including the Women in Finance and Race At Work Charters, Stonewall and upReach to find people from every walk of life and help them thrive with us. We have a whole host of internal networks and support groups you could be involved in, to name a few:
- REACH - Race Equality and Culture Heritage group focuses on representation, retention and engagement for associates from minority ethnic groups and allies
- OutFront - to provide LGBTQ+ support for all associates
- Mind Your Mind - signposting support and promoting positive mental wellbeing for all
- Women in Tech - promoting an inclusive environment in tech
- EmpowHER - network of female associates and allies focusing on developing future leaders, particularly for female talent in our industry
Capital One is committed to diversity in the workplace.
If you require a reasonable adjustment, please contact All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment.
For technical support or questions about Capital One’s recruiting process, please send an email to
Capital One does not provide, endorse nor guarantee and is not liable for third-party products, services, educational tools or other information available through this site.
Capital One Financial is made up of several different entities. Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC).
Who We Are
At Capital One, we’re building a leading information-based technology company. Still founder-led by Chairman and Chief Executive Officer Richard Fairbank, Capital One is on a mission to help our customers succeed by bringing ingenuity, simplicity, and humanity to banking. We measure our efforts by the success our customers enjoy and the advocacy they exhibit. We are succeeding because they are succeeding.
Guided by our shared values, we thrive in an environment where collaboration and openness are valued. We believe that innovation is powered by perspective and that teamwork and respect for each other lead to superior results. We elevate each other and obsess about doing the right thing. Our associates serve with humility and a deep respect for their responsibility in helping our customers achieve their goals and realize their dreams. Together, we are on a quest to change banking for good.
White Collar Factory (95009), United Kingdom, London, LondonStaff Software Engineer - Back End
About this role
Do you love shaping the technical landscape and driving innovation across the organisation?
Are you passionate about solving complex business problems and supporting multiple teams toward a shared technical vision?
At Capital One, you’ll be part of a community of technical leaders who drive engineering excellence, foster innovation, and deliver impactful solutions that meet real customer needs.
What You’ll Do
- Own and drive the technical strategy for a significant business outcome or technology domain, spanning multiple teams and influencing the overall technical direction
- Lead and coordinate the efforts of multiple teams, ensuring their collective work aligns with broader business objectives and technology strategy
- Proactively identify emerging patterns, define and evangelise best practices, and establish reusable frameworks that enhance engineering productivity
- Build and maintain strong relationships with key stakeholders, including senior leadership, product owners, and architects
- Represent Capital One in external technical forums, contributing to vendor/industry discussions
- Drive service quality standards and practices for your domain, guiding complex incident resolution
- Develop and advocate for strategies to proactively manage technical debt across multiple teams
- Actively mentor and develop engineers, fostering a culture of continuous learning
What we’re looking for
- Deep expertise in Java
- Deep expertise in system design and distributed architectures
- Track record of leading technical initiatives across multiple teams
- Strong experience with cloud platforms (AWS, Azure, GCP)
- Proven experience setting a multi-team technical vision and strategy
- Strong track record of technical leadership and influence without authority
- Experience driving engineering standards and best practices across organisations
- Experience of steering Communities of Practice or technical forums
- Strong business acumen and ability to translate technical concepts for various audiences
Where and how you’ll work
This is a permanent position based in our London office.
We have a hybrid working model which gives you flexibility to work from our office and from home.
We’re big on collaboration and connection, so you’ll be based in our London office 3 days a week on Tuesdays, Wednesdays and Thursdays.
What’s in it for you
- Bring us all this - and you’ll be well rewarded with a role contributing to the roadmap of an organisation committed to transformation
- We offer high performers strong and diverse career progression, investing heavily in developing great people through our Capital One University training programmes (and appropriate external providers)
- Immediate access to our core benefits including pension scheme, bonus, generous holiday entitlement and private medical insurance - with flexible benefits available including season-ticket loans, cycle to work scheme and enhanced parental leave
- Open-plan workspaces and accessible facilities designed to inspire and support you. Our Nottingham head-office has a fully-serviced gym, subsidised restaurant, mindfulness and music rooms. In London, you can heighten your mood with a run on our rooftop running track or an espresso at the Workshop Coffee café
What you should know about how we recruit
We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it’s about what you do, not just what you say. That’s why we make our recruitment process fair and accessible. And we offer benefits that attract people at all ages and stages.
We also partner with organisations including the Women in Finance and Race At Work Charters, Stonewall and upReach to find people from every walk of life and help them thrive with us. We have a whole host of internal networks and support groups you could be involved in, to name a few:
- REACH - Race Equality and Culture Heritage group focuses on representation, retention and engagement for associates from minority ethnic groups and allies
- OutFront - to provide LGBTQ+ support for all associates
- Mind Your Mind - signposting support and promoting positive mental wellbeing for all
- Women in Tech - promoting an inclusive environment in tech
- EmpowHER - network of female associates and allies focusing on developing future leaders, particularly for female talent in our industry
- Enabled - focused on supporting associates with disabilities and neurodiversity
Capital One is committed to diversity in the workplace.
If you require a reasonable adjustment, please contact All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment.
For technical support or questions about Capital One’s recruiting process, please send an email to
Capital One does not provide, endorse nor guarantee and is not liable for third-party products, services, educational tools or other information available through this site.
Capital One Financial is made up of several different entities. Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC).
Who We Are
At Capital One, we’re building a leading information-based technology company. Still founder-led by Chairman and Chief Executive Officer Richard Fairbank, Capital One is on a mission to help our customers succeed by bringing ingenuity, simplicity, and humanity to banking. We measure our efforts by the success our customers enjoy and the advocacy they exhibit. We are succeeding because they are succeeding.
Guided by our shared values, we thrive in an environment where collaboration and openness are valued. We believe that innovation is powered by perspective and that teamwork and respect for each other lead to superior results. We elevate each other and obsess about doing the right thing. Our associates serve with humility and a deep respect for their responsibility in helping our customers achieve their goals and realize their dreams. Together, we are on a quest to change banking for good.
Full Stack Software Engineer
Join a trusted supplier delivering mission-critical solutions in the defence and national security sector. You will work on leading-edge technologies across AI/Data Science, Cyber, Cloud, DevOps/SRE, and Platform Engineering, developing solutions that protect people, platforms, and information against constantly evolving threats.
The Role
As a Full Stack Software Engineer, you will design, develop, and maintain mission-critical softwares. You will work on novel products that combine physical and digital systems, collaborate closely with clients to define strategy, and explore emerging technologies.
Key responsibilities include:
Writing clean, secure code following a test-driven approach
Producing reusable and maintainable code
Translating logical designs into physical designs and detailed specifications
Documenting work using appropriate standards and tools, including prototyping where needed
Working with emerging and well-understood technologies, identifying suitable design patterns
Integrating APIs and UI components with existing data stores and services
Maintaining and developing architectural components including data ingest, storage, and REST APIs
Participating in Agile ceremonies including stand-ups, sprint planning, demos, and epic decomposition
Collaborating with user researchers and internal stakeholders to represent user needs
Required Skills
Java Enterprise development and Spring Boot
Front-end frameworks such as React, VueJS, or AngularJS
Experience with appropriate testing frameworks
Technologically curious with the ability and willingness to learn new tools and technologies
Security Clearance
Candidates must be eligible to obtain DV security clearance due to the nature of this work.
Reasonable Adjustments:
Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.
If you need any help or adjustments during the recruitment process for any reason , please let us know when you apply or talk to the recruiters directly so we can support you.
TPBN1_UKTJ
- Role - Senior Salesforce Developer
- Salary - up to £90,000 + Benefits
- Location - London Bridge
- Working Situation - Hybrid (2x per week in the office)
My client who are leaders in their field are looking for a Senior Salesforce Developer who will be responsible for hands-on development, platform optimisation, and delivering scalable solutions across Service Cloud and Marketing Cloud. The role leads Apex development, configuration, and CI/CD processes, while ensuring platform stability, assessing release impacts, resolving BAU issues, and driving continuous improvement.
Key Responsibilities
Salesforce Development
- Design and deliver scalable, high-performance Salesforce solutions.
- Build and configure functionality across Service Cloud and Marketing Cloud.
- Write clean Apex code and use declarative tools to meet business needs.
- Complete unit testing, documentation, and support system testing.
Collaboration & Stakeholder Engagement
- Work with Product Owners and Business Analysts to translate requirements into effective solutions.
- Participate in Agile ceremonies (sprint planning, grooming, retros).
- Advise teams on Salesforce capabilities, limitations, and best practices.
Platform Management & BAU
- Support ongoing maintenance and optimisation of the Salesforce platform.
- Troubleshoot, resolve, and document issues for both projects and BAU.
Essential Skills & Experience
- Extensive hands-on Salesforce development experience in complex environments.
- Strong skills in Apex, LWC, SOQL, REST/SOAP APIs, and Salesforce configuration.
- Solid understanding of Service Cloud and Experience Cloud (essential); Marketing Cloud and Sales Cloud (desirable).
- Experience with CI/CD, Git/GitHub, and structured deployment processes.
- Strong grasp of Salesforce data architecture, platform limits, and security
Ready to work somewhere that cares more about how you build software than how fast you can ship it? At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving. Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in. The role Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, eXtreme programming practices and use industry-leading programming languages to deliver agile transformation. Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice. Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority. The role is varied, technical, never confined to any one provider or solution and there are always opportunities for learning and development. Requirements Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it. Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days. Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit or experience of working in the public sector is required. Technical Skills - Expertise in Java or Scala is required - Experience in other languages such as Kotlin, Ruby or Javascript is also valuable - Understanding of Object Oriented Programming - In depth knowledge of concepts and uses of testing - Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards - Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success - Experience with agile methodology A consultant in software development at Opencast is responsible for: - Delivering in the upkeep of their team’s backlog - Collaborating with the teams testing effort - Leading on the implementation of user stories - Embracing mobbing and pairing - Working with others in a collaborative, multi-disciplinary environment - Contributing to Opencast’s communities of practice Salary £52,000 - £59,000 What we offer A competitive package including a 7% employer pension contribution, share options and a discretionary bonus. You’ll also benefit from flexible working hours (aligned to client commitments), 25 days’ holiday, and access to 3 annual “life happens” days to support unexpected situations. We also offer wellbeing support, ongoing professional development, volunteering opportunities and the chance to be part of a genuinely supportive team. Where you’ll work This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role. We include you We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all. Interview Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs. Want to know more? Visit our website for more details.
Title: Senior Software Engineer (GPU Drivers)
Company: AI Acceleration
Location: London (very flexible WFH)
Pay: Up to £160,000 + bonus and benefits
Company:
An advanced HPC R&D firm, looking to expand their GPU Driver team. Most of the team are ex-Big-Tech, ex-FAANG or ex-Chip firms. They joined because they get more flexibility and have more challenging/interesting work to do as the team is significantly smaller, with highly technical leadership. If you want to work alongside some of the brightest, most enthusiastic people in the industry, this may be worth exploring.
Role:
Senior Software Engineer position. You will be a significant hire spearheading much of their 2025 development. Much of the team will be built around you, and significant hires have already been made. You will develop, optimise and maintain their GPU driver stack, focusing on the performance and efficiency of graphics and compute workloads on cutting-edge GPU architectures.
About you:
- 2 years+ in GPU Driver Development
- Strong C++ or C programming skills
- Experience with OpenCL or Vulkan
Full details are available. Please don’t hesitate to get in touch.
The role requires close collaboration within an agile software environment, applying strong technical expertise and domain knowledge while communicating effectively with a broad range of internal and external stakeholders. Depending on individual strengths and experience, the role may focus on either modern user interface design and implementation or embedded software development.
For candidates with leadership or line management experience, the position may also include responsibility for managing and supporting team members, reporting on performance, and assisting with resourcing and development.
Responsibilities:
- Producing detailed designs for product software components
- Implementing and testing software as part of an agile development team
- Developing a strong understanding of existing electronic warfare, sensor, and communications products, as well as future development plans
- Contributing to system architecture and continuous improvement initiatives
Candidates should demonstrate:
- A BEng/BSc and/or Master’s degree in Engineering, Computer Science, Information Systems, or a related discipline
- Knowledge of sensor and communication systems
- Experience across the full software development lifecycle, from research and concept through to product delivery
- Understanding of modern software architecture practices
- Experience with scientific or signal processing applications, including algorithm development
- Proficiency in multiple programming languages, such as C++, C#, and Python, with the ability to switch between them effectively
- Familiarity with agile development methodologies, including Scrum and Kanban
- Experience using modern development tools, including Git, GitLab, and Visual Studio Code
Reasonable Adjustments:
Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.
If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.
Permanent | Hybrid Working | South East England We are partnering with a leading customer-focused organisation operating in a complex, regulated environment to recruit a Technical Architect for a critical retail technology domain. This role provides domain-level technical leadership across a key part of the customer and commercial ecosystem. You will define, shape and govern the architecture supporting retail operations delivered in an operational, distributed environment. This is a high-impact opportunity to drive architectural direction across point-of-sale systems, retail platforms, catalogue and pricing services, payment integrations, supply chain connectivity, and post-transaction reconciliation processes. You will work closely with delivery teams, third-party suppliers and business stakeholders to simplify complexity and enable sustainable technical change. Key Responsibilities - Own and evolve the target-state architecture for the retail technology domain - Define and govern architectural standards, patterns and principles - Shape the transition of legacy systems toward modular, event-driven, cloud-aligned designs - Develop and maintain domain roadmaps aligned with enterprise strategy - Manage technical risk and technical debt registers - Ensure alignment with security, performance, resilience and operational readiness standards - Lead architecture reviews and support governance processes - Translate business requirements into clear, pragmatic technical designs - Guide delivery teams and suppliers to ensure architectural intent is realised - Produce high-quality architectural artefacts using standard modelling approaches (e.g. UML, BPMN, C4, ArchiMate) - Design robust, scalable and operable integration patterns - Support systems operating in intermittently connected or distributed environments (including edge/mobile devices) - Oversee data flows across retail, operational and financial systems - Ensure solutions operate safely and reliably within a live operational environment - Mentor engineers and promote best practice in architecture - Support proof-of-concept initiatives for new retail capabilities and digital tooling - Improve documentation standards, reusable patterns and architectural processes Experience & Skills Required - Proven experience as a Technical Architect or Senior Engineer - Background in retail, ecommerce, payments, logistics or transport-related environments - Strong knowledge of integration patterns, event-driven architecture, cloud platforms, and domain-driven design - Experience modernising and evolving legacy platforms - Understanding of distributed systems and offline-capable solutions - Familiarity with financial processing and reconciliation workflows - Strong stakeholder engagement and communication skills - Experience working with mobile or edge devices
Ready to work somewhere that cares more about how you build software than how fast you can ship it? At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving. Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in. The role We’re looking for Contractors in Software Development (consultant level) to help our major clients transform. Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, extreme programming practices and use industry-leading programming languages to deliver agile transformation. Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice. Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority. Contractors at Opencast follow the same principles as permanent consultants. The roles are varied, technical, and never confined to any one provider or solution. Requirements Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it. Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days. As attendance at client sites is a routine part of the role’s working pattern and involves occasional travel, travel expenses are not covered. Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial. Technical Skills - Expertise in Java and/or Scala is required - Experience with Javascript, Typescript, Kotlin, Python or Ruby is also valuable - Understanding of Object Oriented Programming - In depth knowledge of concepts and uses of testing - Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards - Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success - Experience with agile methodology A contractor in software development at Opencast is responsible for: - Delivering in the upkeep of their team’s backlog - Collaborating with the teams testing effort - Leading on the implementation of user stories - Embracing mobbing and pairing - Working with others in a collaborative, multi-disciplinary environment Salary Up to £450 per day (working inside IR35) Where you’ll work This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role. We include you We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all. Interview Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs. Want to know more? Visit our website for more details.
Ready to work somewhere that cares more about how you build software than how fast you can ship it? At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving. Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in. The role Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, extreme programming practices and use industry-leading programming languages to deliver agile transformation. Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice. Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority. The role is varied, technical, never confined to any one provider or solution and there are always opportunities for learning and development. Requirements Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it. Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days. Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial. Technical Skills - Expertise in Java or Scala is required - Experience in other languages such as Kotlin, Ruby or Javascript is also valuable - Deep understanding of programming paradigm, code design, testing, accessibility, performance and security - Proven ability to apply different testing tools and methods in practice - Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards - Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success. - Experience with agile methodology A senior consultant in software development at Opencast is responsible for: - Driving the elaboration of their team’s backlog - Setting testing strategies to match industry standards - Being a technical expert in their team (or acting as the team lead) - Leading the technical representation in a project discovery - Mentoring and coaching others to help them achieve their full potential - Demonstrating leadership within Opencast communities of practice Salary £59,001 - £72,000 What we offer A competitive package including a 7% employer pension contribution, share options and a discretionary bonus. You’ll also benefit from flexible working hours (aligned to client commitments), 25 days’ holiday, and access to 3 annual “life happens” days to support unexpected situations. We also offer wellbeing support, ongoing professional development, volunteering opportunities and the chance to be part of a genuinely supportive team. Where you’ll work This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role. We include you We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all. Interview Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs. Want to know more? Visit our website for more details.
Ready to work somewhere that cares more about how you build software than how fast you can ship it? At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving. Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in. The role We’re looking for Contractors in Software Development (Senior level or Technical Lead) to help our major clients transform. Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, extreme programming practices and use industry-leading programming languages to deliver agile transformation. Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice. Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority. Contractors at Opencast follow the same principles as permanent consultants. The roles are varied, technical, and never confined to any one provider or solution. Requirements Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it. Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days. As attendance at client sites is a routine part of the role’s working pattern and involves occasional travel, travel expenses are not covered. Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial. Technical Skills - Expertise in Java and/or Scala is required - Experience in other languages such as Javascript, Typescript, Kotlin, Python or Ruby is also valuable - Experience in a technical leadership role - Deep understanding of programming paradigm, code design, testing, accessibility, performance and security - Proven ability to apply different testing tools and methods in practice - Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards - Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success - Experience with agile methodology A senior level contractor in software development at Opencast is responsible for: - Driving the elaboration of their team’s backlog - Setting testing strategies to match industry standards - Being a technical expert in their team (or acting as the team lead) - Leading the technical representation in a project discovery - Acting as a technical lead in the team, enabling them to achieve their full potential Salary £450 - £600 per day (working inside IR35) Where you’ll work This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role. We include you We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all. Interview Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs. Want to know more? Visit our website for more details.
_Haystack is working with a direct employer on this opportunity._ Company We are using AI Agents to transform customer experience for ecommerce brands. With a proprietary approach to agentic AI, we have a unique opportunity to become the undisputed leader in our industry. We’re looking for excellent candidates to join our dedicated, thoughtful, and hardworking team to help us achieve that goal. We are a global company with offices in London, New York, and people across the world. Our customers include some of the biggest names in retail including On, Rapha, Air Up, Holland & Barrett, AllSaints, Honeylove, and Clarins. Role We are looking for an experienced software engineer to help us build our product. You will be working on the platform and backend services of the product and also the middle layer that sits between third party customer support tools and our proprietary AI platform. We value autonomy, excellence, pragmatism and impact. Responsibilities include: - Building microservices for our no-code platform, analytics, admin console, data management functionality and others - Designing and implementing maintainable and scalable architecture for consuming and providing APIs - Integrating with 3rd party systems Required Experience - Scala (3+ years of real, hands-on experience in Scala in a professional environment) - Functional programming and hands-on experience with functional programming libraries - Experience developing HTTP RESTful APIs - Excellent knowledge of SQL and relational databases (PostgreSQL) - Knowledge of Terraform (hands-on experience), Docker, AWS - Experience building and deploying microservices-based architectures - We use a functional Scala stack, primarily built on the Typelevel ecosystem, including: http4s, Circe, Cats, Cats Effect, FS2, Monix, and Slick. Interview Process - Our interview process is designed to be clear, fair, and human — just like how we work day to day. - Intro Call (40 mins) — A relaxed chat to learn more about you and share what we’re building. - Technical Stage — Show us how you think and solve problems, including a take-home challenge. - Culture Stage — We’ll explore how you collaborate, communicate, and align with our team values. - Final Chat — Meet a senior team member to discuss long-term goals and mutual fit. - We keep things efficient and most candidates complete all stages within 2–3 weeks. Benefits 🚀 Thrive in a dynamic start-up culture 💰 £80k - £100k annual salary depending on experience 📈 Stock options 🏝️ 34 days off — 25 annual + 8 public + your birthday! 🎳 Quarterly team socials & perks 💪 Stay fit with a $210 monthly fitness stipend or Third Space membership 🎉 Celebrate your birthday with a day off! We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
Permanent | Hybrid Working | South East England We are partnering with a leading organisation operating in a complex, real-time operational environment to recruit a Technical Lead within its Integrated Operations and Planning technology domain. This role sits at the heart of mission-critical systems that power operational planning and real-time control functions. The product suite underpins essential processes such as workforce planning, scheduling, disruption management and integrated control operations. You will shape the technical direction of these platforms, ensuring solutions are scalable, resilient and future-ready. Working closely with Product and Delivery leadership, you will balance business priorities with sound engineering decisions to deliver measurable operational value. Role Purpose - Provide technical leadership for a product team, ensuring solutions are scalable, secure and fit for purpose - Act as the technical authority across product, delivery and engineering collaboration - Guide and mentor engineers, promoting sustainable engineering practices across the full product lifecycle - Balance short-term delivery objectives with long-term maintainability, resilience and cost-effectiveness Key Responsibilities - Provide hands-on leadership, setting coding standards and reviewing designs to ensure best practice in security, performance and integration - Define and own technical architecture across operational planning and control products - Partner with Product Managers to translate business requirements into technical designs, effort estimates and roadmaps - Work with Delivery Leads to align technical feasibility with delivery timelines, identifying risks and dependencies early - Champion modern engineering practices including CI/CD, cloud-native design, API-first development and automated testing - Collaborate with enterprise architecture and governance forums to ensure alignment with broader technology strategy and standards - Act as a trusted advisor to operational stakeholders, clearly articulating technical trade-offs and outcomes - Mentor and develop engineers, fostering a high-performing, continuously improving team culture - Lead root cause analysis and resolution of critical production issues impacting live operations Experience & Skills Required - Proven experience as a Technical Lead or Principal Engineer within large-scale, mission-critical systems - Strong software engineering background with expertise in at least one major development stack (e.g. Java, .NET, Python or optimisation tooling) - Experience designing and delivering cloud-native solutions (AWS preferred), with strong knowledge of APIs, event-driven architecture and microservices - Familiarity with operational planning, scheduling or real-time control systems within transport or similarly complex environments (desirable) - Strong understanding of DevOps practices including CI/CD pipelines, automated testing and observability - Experience working within Agile delivery environments and shaping effective team ways of working - Strong analytical and problem-solving skills, with the ability to balance time, cost and technical debt considerations - Ability to influence stakeholders at all levels, translating technical concepts into clear business value - Demonstrated experience mentoring engineers and building high-performing teams - Degree in Computer Science, Software Engineering or equivalent practical experience
Permanent | Hybrid Working | South East England We are partnering with a fast-paced, customer-focused organisation undertaking a significant data transformation programme. With major investment in a modern lakehouse platform and access to rich, high-volume datasets, this is an opportunity to help reshape how data is stored, analysed and leveraged across the business. As a Senior Platform Data Engineer, you will provide technical leadership within the Data Engineering team, working closely with Data Scientists, Machine Learning Engineers and business stakeholders to deliver scalable, high-value data solutions. Key Responsibilities - Design and build robust, scalable data pipelines to serve analytics and data science communities - Provide hands-on expertise across modern data engineering technologies (e.g. Databricks, Spark, Python, SQL, Scala) - Collaborate with data scientists and ML engineers to develop and deploy machine learning models addressing key business challenges - Coach and mentor engineers (including contractors), raising development standards and engineering maturity - Partner with Business Analysts to translate requirements into measurable business outcomes - Oversee code quality and project deliverables across releases - Establish and maintain documentation libraries and data catalogues for developed products - Contribute to platform evolution and continuous improvement of data engineering practices Core Skills & Experience Technical Capability - Significant experience designing and delivering data solutions on cloud-based, distributed big data platforms - Strong hands-on software engineering experience in Python, with knowledge of modern development practices (TDD, CI/CD, automated deployment pipelines) - Experience with automated testing of data transformation pipelines (e.g. Pytest, dbt unit testing frameworks) - Strong SQL skills, including performance tuning and debugging - Experience in data warehouse optimisation (schema evolution, indexing, partitioning) - Infrastructure as Code experience (e.g. Terraform or CloudFormation) - Strong knowledge of distributed data processing frameworks such as Apache Spark (or similar technologies such as Flink, Hadoop or Beam) - Familiarity with lakehouse architecture principles and modern data platforms - Experience implementing data quality, lineage and observability frameworks - Understanding of data governance, security and privacy principles, including handling of sensitive data within regulated environments Engineering & Collaboration - Comfortable working independently while aligning with overarching data strategy - Strong communication skills across technical and non-technical audiences - Structured, analytical problem-solver with a focus on outcomes and innovation - Passionate about modern data technologies and continuous learning Desirable Experience - Experience building real-time or event-driven data pipelines in commercial production environments (e.g. streaming architectures, Kafka, Spark Streaming, Beam) - Understanding of unbounded data processing and streaming design patterns - Familiarity with machine learning workflows and model lifecycle considerations - Experience supporting analytical visualisation tools (e.g. Tableau, Power BI or similar platforms) - Experience working within airline, ecommerce, retail or similarly data-rich industries - Experience within AWS cloud environments - Experience building transformation frameworks using dbt