Top Tech Jobs & Startup Jobs

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.

Provide hands-on technical configuration, integrations, data migration, troubleshooting, and support for Oracle HCM Cloud modules. Build OIC and REST/SOAP interfaces, create Fast Formulas, HCM Extracts, BI Publisher reports, perform data audits, and produce technical documentation and test artifacts.

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.

Design, develop, and support high-performance swaps trading and post-trade systems focused on corporate actions processing. Implement trade capture, booking, validation, lifecycle events, settlements, reconciliations, and event-driven workflows. Collaborate with trading, operations, risk, finance, and technology teams, troubleshoot production issues, and contribute to architecture, code reviews, testing, and engineering best practices.

Lead design and implementation of scalable, low-latency equities trading systems. Hands-on Java development, provide technical guidance, enforce code quality, mentor engineers, collaborate with global stakeholders, and drive CI/CD, cloud, and DevOps practices to meet performance, reliability, and business requirements.

Lead design, development, and production deployment of a bond analytics library for fixed income and structured products. Oversee model development, validation, and risk measurement (VaR, sensitivities, stress testing), ensure regulatory compliance, architect scalable quantitative libraries, collaborate with business and regulatory stakeholders, and mentor junior team members.

Support development and maintenance of equity derivatives risk analytics: volatility calibration, option pricing, VaR, scenario and stress testing, sensitivity analysis, methodology enhancement, production issue resolution, and stakeholder documentation.

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.

Serve as strategic and operational partner to the CIO, driving enterprise initiatives, governance, IT strategy execution, people and engagement programs, communications, and business operations. Lead cross-functional transformation programs, prepare executive materials, manage governance and decision tracking, own talent and campus recruitment, and support organizational design, change management, and administrative compliance.