Top Tech Jobs & Startup Jobs in London

Design, enhance, and maintain Snowflake/AWS-based historical time series infrastructure for market risk. Build Python ETL/ELT pipelines and optimized SQL models, source and validate end-of-day market data, implement data-quality remediation (gap-filling, back-filling, anomaly correction), collaborate with Market Data and Risk teams to ensure auditable, reproducible risk inputs for VaR and regulatory use.

Support the lead analyst covering Integrated Oil & Gas: maintain and develop Excel-based financial models, forecast commodity prices, contribute thematic and stock-specific research, assist client marketing and corporate access, and support Investment Banking and Corporate Broking colleagues.

Join Jefferies London M&A team supporting Greek-focused buy- and sell-side deals. Build financial models (DCF, comps, LBO), prepare pitchbooks and IMs, perform company/market research, assist due diligence, and coordinate stakeholders across cross-border transactions. Native Greek and strong English required.

Develop and optimize algorithmic trading software in modern C++ with strong focus on performance, memory management, and multi-threading. Prototype and analyze data using Python/Perl/Shell and SQL, apply ML frameworks, and collaborate globally. Recommend optimizations, use performance tools, and support low-latency trading systems.

Join the Industrials equity research team to support the lead analyst with financial modelling, idea generation, written research, presentations, data sourcing, market monitoring, and client interaction, collaborating with Investment Banking and Corporate Broking to grow the franchise.

Design, configure, test and implement reconciliations on a new on-prem AWS platform. Build reconciliations from requirements, analyse source/target data, write and debug SQL, support data migration, manage vendors and stakeholders, and drive control, automation and documentation across reconciliation processes.

Develop and maintain the global Securities Finance platform (on-prem and AWS). Own projects end-to-end, write unit tests, assist with user testing, and work with support/release teams to deliver robust, high-performance solutions for front and middle office users.

Join Jefferies London Industrials team to execute M&A, equity and debt transactions. Build and review complex financial models (DCF, LBO, trading/transaction comps, merger models), coordinate due diligence and documentation, prepare marketing and board materials, liaise with advisors, mentor analysts, and support client pitches and sector research for industrial clients across EMEA.

Join Jefferies UK Investment Banking team as an Associate focused on Investment Companies & Funds. Lead transaction execution for M&A, ECM, and fundraising; build complex financial models and valuations (DCF, comps, NAV, SOTP); prepare client materials; coordinate diligence; support origination and client coverage; mentor analysts and collaborate across teams. Requires strong modelling, valuation, and transaction execution experience in financial services or asset management.

Lead execution of leveraged finance transactions (LBOs, acquisition financings, refinancings), manage financial modelling and diligence, engage investors and rating agencies, support origination and client coverage, provide market and product expertise, and mentor Associates/Analysts to ensure high-quality deliverables and integrated coverage across teams.