G MASS Consulting is supporting a global broker undertaking a major front-to-back transformation of its trading and post-trade infrastructure. The programme centres on the implementation and consolidation of the Calypso platform, replacing legacy systems and establishing a single strategic platform across multiple asset classes. We are seeking an experienced Programme Director / Transformation Lead to take ownership of the delivery of this transformation. This individual will provide end-to-end programme leadership, coordinating technology delivery, operational change and vendor engagement across global teams. The role requires a senior transformation leader who has delivered large-scale Calypso implementations or migrations within complex trading environments, ideally spanning multiple asset classes and global operations. Responsibilities Provide overall programme leadership for the Calypso implementation and platform consolidation initiative Establish delivery governance, programme structure and milestone tracking across workstreams Manage programme dependencies across technology, operations and product teams Coordinate with the Calypso vendor and implementation partners to ensure delivery milestones are achieved Lead cross-asset migration planning across FX, commodities, rates, and equity derivatives workflows Oversee operational change and ensure alignment between platform delivery and business processes Identify and mitigate programme risks, controlling delivery slippage and complex dependencies Engage senior stakeholders across global teams in EMEA, the US, and the Middle East Drive collaboration across internal technology teams, operations functions, and external vendors Qualifications Extensive experience delivering Calypso platform implementations, migrations or major transformations Proven programme leadership across large-scale trading platform or capital markets technology initiatives Strong understanding of cross-asset trading environments (FX, commodities, rates and derivatives) Demonstrated ability to manage complex transformation programmes involving multiple stakeholders and vendors Experience establishing governance frameworks and driving delivery across global teams Strong vendor management capability, particularly when coordinating with platform providers and system integrators Background within a Tier-1 investment bank, commodities trading firm, or global brokerage 6-month rolling contract. Salary / rate to be discussed.
Aug 29, 2026
Full time
G MASS Consulting is supporting a global broker undertaking a major front-to-back transformation of its trading and post-trade infrastructure. The programme centres on the implementation and consolidation of the Calypso platform, replacing legacy systems and establishing a single strategic platform across multiple asset classes. We are seeking an experienced Programme Director / Transformation Lead to take ownership of the delivery of this transformation. This individual will provide end-to-end programme leadership, coordinating technology delivery, operational change and vendor engagement across global teams. The role requires a senior transformation leader who has delivered large-scale Calypso implementations or migrations within complex trading environments, ideally spanning multiple asset classes and global operations. Responsibilities Provide overall programme leadership for the Calypso implementation and platform consolidation initiative Establish delivery governance, programme structure and milestone tracking across workstreams Manage programme dependencies across technology, operations and product teams Coordinate with the Calypso vendor and implementation partners to ensure delivery milestones are achieved Lead cross-asset migration planning across FX, commodities, rates, and equity derivatives workflows Oversee operational change and ensure alignment between platform delivery and business processes Identify and mitigate programme risks, controlling delivery slippage and complex dependencies Engage senior stakeholders across global teams in EMEA, the US, and the Middle East Drive collaboration across internal technology teams, operations functions, and external vendors Qualifications Extensive experience delivering Calypso platform implementations, migrations or major transformations Proven programme leadership across large-scale trading platform or capital markets technology initiatives Strong understanding of cross-asset trading environments (FX, commodities, rates and derivatives) Demonstrated ability to manage complex transformation programmes involving multiple stakeholders and vendors Experience establishing governance frameworks and driving delivery across global teams Strong vendor management capability, particularly when coordinating with platform providers and system integrators Background within a Tier-1 investment bank, commodities trading firm, or global brokerage 6-month rolling contract. Salary / rate to be discussed.
A global consulting firm is seeking an experienced Programme Director / Transformation Lead to oversee the Calypso platform transformation. This role requires extensive experience in large-scale Calypso implementations and strong leadership capabilities, particularly in cross-asset trading environments. The successful candidate will engage with global teams to ensure effective delivery and governance of transformation initiatives. The position offers a 6-month rolling contract with a competitive salary to be discussed.
Aug 29, 2026
Full time
A global consulting firm is seeking an experienced Programme Director / Transformation Lead to oversee the Calypso platform transformation. This role requires extensive experience in large-scale Calypso implementations and strong leadership capabilities, particularly in cross-asset trading environments. The successful candidate will engage with global teams to ensure effective delivery and governance of transformation initiatives. The position offers a 6-month rolling contract with a competitive salary to be discussed.
G MASS is partnering with an international fund and corporate services organisation to appoint an experienced Data Science Lead who will provide senior advisory and technical guidance across a foundational data programme in London. The role is hybrid (2-3 days/week) with an immediate start and a daily rate up to £1500. You will establish data governance, data quality KPIs, and education for FP&A and data engineering teams, defending modelling decisions to CTOs and raising capability across the
Aug 26, 2026
Full time
G MASS is partnering with an international fund and corporate services organisation to appoint an experienced Data Science Lead who will provide senior advisory and technical guidance across a foundational data programme in London. The role is hybrid (2-3 days/week) with an immediate start and a daily rate up to £1500. You will establish data governance, data quality KPIs, and education for FP&A and data engineering teams, defending modelling decisions to CTOs and raising capability across the
ace has partnered with a prestigious, leading international fund and corporate services organisation to appoint an experiencedData Science Leadwho will provide senior advisoryand technicalguidance across a foundational data programme, at the point where the structural decisions are being made. Our client is midway through asignificant changeagenda:consolidatinga fragmented core administration estate andinvesting seriously in clean data, consistent data processes, and data quality measurement. This is aseniorrole focused on judgementandoutput. You will sit alongside an internal data lead, a small data engineering function and an FP&A team, and your mandate is to make sure they build the right thing - bringing genuine data science fundamentals totheteam,challenging structural decisions before they become expensive, and leaving the organisation more capable than you found it. The successful candidate will be equally comfortable defending a modelling decision to a CTO and teaching a schema fundamental to an FP&A analyst. Responsibilities Define and govern the modelling approach for the client's new data mart: schemaselection, grain, conformeddimensionsand semantic layer structure - with explicit focus on avoiding decisions that foreclose future analytical or AI use cases. Establish data science fundamentals and good practice across the FP&A and data engineering teams: Modelling discipline, statistical rigour,reproducibilityand documentation standards Review of the team's own output, with structured feedback Define data quality dimensions, KPIs and measurement approach, and advise on how these are instrumented and reported. Assess the analytical readiness of the current data estate and set the sequencing for remediation and cleansing work. Deliver structured education and upskilling - working sessions and written standards - so capability persists beyond the engagement. Advise on the data governance implications of downstream AI and agentic tooling, including client-data segregation, permissible-usecontrolsand auditability. Provide a clear, honest read on where the client genuinely needs sustained data science capability versus where existing capability simply needs tuning. Substantial financial services domain experience - fund administration, corporate or fiduciary services, asset servicing, wealth,bankingor insurance. Candidates must understand the fundamentals of the business, not only the shape of the data. Senior practitioner background, typically 10+ years, with meaningful time in an advisory, lead or principal capacity where the deliverable was a recommendation rather than a model. Deepexpertisein dimensional data modelling, schemadesignand semantic layer architecture; able to articulate and defend the trade-offs between competing modelling approaches. Expert SQL; strong Python for analysis and validation. Practical experience of the Microsoft data stack - Fabric, Synapse, Power BI semantic models, and ideally Azure AI Foundry. Demonstrable experience defining data quality frameworks and KPIs in an enterprise setting. Evidenced capability-building experience. A material part of this role is raising the standard of an existing team. Executive presence and credibility with technology leadership and finance stakeholders. Comfortable operating at enterprise, not internet, data scale. Please note that this role is expected to 2or 3days per week,hybrid in London. Start date isideallyimmediate, with the ability to earn up to £1500 a day.
Aug 26, 2026
Full time
ace has partnered with a prestigious, leading international fund and corporate services organisation to appoint an experiencedData Science Leadwho will provide senior advisoryand technicalguidance across a foundational data programme, at the point where the structural decisions are being made. Our client is midway through asignificant changeagenda:consolidatinga fragmented core administration estate andinvesting seriously in clean data, consistent data processes, and data quality measurement. This is aseniorrole focused on judgementandoutput. You will sit alongside an internal data lead, a small data engineering function and an FP&A team, and your mandate is to make sure they build the right thing - bringing genuine data science fundamentals totheteam,challenging structural decisions before they become expensive, and leaving the organisation more capable than you found it. The successful candidate will be equally comfortable defending a modelling decision to a CTO and teaching a schema fundamental to an FP&A analyst. Responsibilities Define and govern the modelling approach for the client's new data mart: schemaselection, grain, conformeddimensionsand semantic layer structure - with explicit focus on avoiding decisions that foreclose future analytical or AI use cases. Establish data science fundamentals and good practice across the FP&A and data engineering teams: Modelling discipline, statistical rigour,reproducibilityand documentation standards Review of the team's own output, with structured feedback Define data quality dimensions, KPIs and measurement approach, and advise on how these are instrumented and reported. Assess the analytical readiness of the current data estate and set the sequencing for remediation and cleansing work. Deliver structured education and upskilling - working sessions and written standards - so capability persists beyond the engagement. Advise on the data governance implications of downstream AI and agentic tooling, including client-data segregation, permissible-usecontrolsand auditability. Provide a clear, honest read on where the client genuinely needs sustained data science capability versus where existing capability simply needs tuning. Substantial financial services domain experience - fund administration, corporate or fiduciary services, asset servicing, wealth,bankingor insurance. Candidates must understand the fundamentals of the business, not only the shape of the data. Senior practitioner background, typically 10+ years, with meaningful time in an advisory, lead or principal capacity where the deliverable was a recommendation rather than a model. Deepexpertisein dimensional data modelling, schemadesignand semantic layer architecture; able to articulate and defend the trade-offs between competing modelling approaches. Expert SQL; strong Python for analysis and validation. Practical experience of the Microsoft data stack - Fabric, Synapse, Power BI semantic models, and ideally Azure AI Foundry. Demonstrable experience defining data quality frameworks and KPIs in an enterprise setting. Evidenced capability-building experience. A material part of this role is raising the standard of an existing team. Executive presence and credibility with technology leadership and finance stakeholders. Comfortable operating at enterprise, not internet, data scale. Please note that this role is expected to 2or 3days per week,hybrid in London. Start date isideallyimmediate, with the ability to earn up to £1500 a day.
A leading Investment Manager in the UK is seeking an experienced Software Engineer for an initial 6-month role that could lead to permanent employment. The position involves working within a core engineering team to develop and enhance data and infrastructure platforms supporting systematic trading strategies. The ideal candidate will have over 5 years of experience in Java or Python, possess strong problem-solving skills, and work effectively in a data-driven environment. Salary up to £100k available.
Aug 02, 2026
Full time
A leading Investment Manager in the UK is seeking an experienced Software Engineer for an initial 6-month role that could lead to permanent employment. The position involves working within a core engineering team to develop and enhance data and infrastructure platforms supporting systematic trading strategies. The ideal candidate will have over 5 years of experience in Java or Python, possess strong problem-solving skills, and work effectively in a data-driven environment. Salary up to £100k available.
Overview G MASS are currently looking for an experienced Software Engineer to join a leading Investment Manager client on an initial 6-month engagement. This role sits within a core engineering team at the centre of a highly quantitative investment environment, supporting the technology and data platforms that underpin systematic trading strategies and advanced research. You will be working in a fast-paced, data-driven environment where engineering plays a critical role in enabling investment teams to access, process and utilise large volumes of market and research data. Responsibilities Design, develop and enhance large-scale data and infrastructure platforms supporting trading and research. Build and maintain systems capable of processing large volumes of data from numerous global sources. Work closely with researchers, traders and engineers to ensure platforms effectively support investment workflows. Contribute to improving the scalability, performance and reliability of distributed systems. Develop and maintain services primarily using Java and Python. Work across modern data and messaging technologies including Kafka, ArcticDB and MongoDB. Qualifications Degree in a quantitative/technical field (e.g. Computer Science, Mathematics, Engineering or Physics) 5+ years' software engineering experience using Java or Python Strong Linux and Git knowledge Experience with modern databases (e.g. Postgres, MongoDB or similar) Strong problem-solving skills and attention to detail Able to work independently and collaborate with stakeholders Nice to have Exposure to distributed systems Open-source contributions Familiarity with LLMs / AI tooling Compensation and engagement Salary: up to £100k Length: initial 6 months, with a view to being made permanent with the client
Aug 02, 2026
Full time
Overview G MASS are currently looking for an experienced Software Engineer to join a leading Investment Manager client on an initial 6-month engagement. This role sits within a core engineering team at the centre of a highly quantitative investment environment, supporting the technology and data platforms that underpin systematic trading strategies and advanced research. You will be working in a fast-paced, data-driven environment where engineering plays a critical role in enabling investment teams to access, process and utilise large volumes of market and research data. Responsibilities Design, develop and enhance large-scale data and infrastructure platforms supporting trading and research. Build and maintain systems capable of processing large volumes of data from numerous global sources. Work closely with researchers, traders and engineers to ensure platforms effectively support investment workflows. Contribute to improving the scalability, performance and reliability of distributed systems. Develop and maintain services primarily using Java and Python. Work across modern data and messaging technologies including Kafka, ArcticDB and MongoDB. Qualifications Degree in a quantitative/technical field (e.g. Computer Science, Mathematics, Engineering or Physics) 5+ years' software engineering experience using Java or Python Strong Linux and Git knowledge Experience with modern databases (e.g. Postgres, MongoDB or similar) Strong problem-solving skills and attention to detail Able to work independently and collaborate with stakeholders Nice to have Exposure to distributed systems Open-source contributions Familiarity with LLMs / AI tooling Compensation and engagement Salary: up to £100k Length: initial 6 months, with a view to being made permanent with the client
G MASS Consulting is supporting a global broker undertaking a major front-to-back transformation of its trading and post-trade infrastructure. The programme centres on the implementation and consolidation of the Calypso platform, replacing legacy systems and establishing a single strategic platform across multiple asset classes. We are seeking an experienced Programme Director / Transformation Lead to take ownership of the delivery of this transformation. This individual will provide end-to-end programme leadership, coordinating technology delivery, operational change and vendor engagement across global teams. The role requires a senior transformation leader who has delivered large-scale Calypso implementations or migrations within complex trading environments, ideally spanning multiple asset classes and global operations. Responsibilities Provide overall programme leadership for the Calypso implementation and platform consolidation initiative Establish delivery governance, programme structure and milestone tracking across workstreams Manage programme dependencies across technology, operations and product teams Coordinate with the Calypso vendor and implementation partners to ensure delivery milestones are achieved Lead cross-asset migration planning across FX, commodities, rates, and equity derivatives workflows Oversee operational change and ensure alignment between platform delivery and business processes Identify and mitigate programme risks, controlling delivery slippage and complex dependencies Engage senior stakeholders across global teams in EMEA, the US, and the Middle East Drive collaboration across internal technology teams, operations functions, and external vendors Qualifications Extensive experience delivering Calypso platform implementations, migrations or major transformations Proven programme leadership across large-scale trading platform or capital markets technology initiatives Strong understanding of cross-asset trading environments (FX, commodities, rates and derivatives) Demonstrated ability to manage complex transformation programmes involving multiple stakeholders and vendors Experience establishing governance frameworks and driving delivery across global teams Strong vendor management capability, particularly when coordinating with platform providers and system integrators Background within a Tier-1 investment bank, commodities trading firm, or global brokerage 6-month rolling contract. Salary / rate to be discussed.
Aug 01, 2026
Full time
G MASS Consulting is supporting a global broker undertaking a major front-to-back transformation of its trading and post-trade infrastructure. The programme centres on the implementation and consolidation of the Calypso platform, replacing legacy systems and establishing a single strategic platform across multiple asset classes. We are seeking an experienced Programme Director / Transformation Lead to take ownership of the delivery of this transformation. This individual will provide end-to-end programme leadership, coordinating technology delivery, operational change and vendor engagement across global teams. The role requires a senior transformation leader who has delivered large-scale Calypso implementations or migrations within complex trading environments, ideally spanning multiple asset classes and global operations. Responsibilities Provide overall programme leadership for the Calypso implementation and platform consolidation initiative Establish delivery governance, programme structure and milestone tracking across workstreams Manage programme dependencies across technology, operations and product teams Coordinate with the Calypso vendor and implementation partners to ensure delivery milestones are achieved Lead cross-asset migration planning across FX, commodities, rates, and equity derivatives workflows Oversee operational change and ensure alignment between platform delivery and business processes Identify and mitigate programme risks, controlling delivery slippage and complex dependencies Engage senior stakeholders across global teams in EMEA, the US, and the Middle East Drive collaboration across internal technology teams, operations functions, and external vendors Qualifications Extensive experience delivering Calypso platform implementations, migrations or major transformations Proven programme leadership across large-scale trading platform or capital markets technology initiatives Strong understanding of cross-asset trading environments (FX, commodities, rates and derivatives) Demonstrated ability to manage complex transformation programmes involving multiple stakeholders and vendors Experience establishing governance frameworks and driving delivery across global teams Strong vendor management capability, particularly when coordinating with platform providers and system integrators Background within a Tier-1 investment bank, commodities trading firm, or global brokerage 6-month rolling contract. Salary / rate to be discussed.