Senior Software Engineer Python React jobs in Waltham

We’re looking for a Software Engineer to help design, build, and scale the data infrastructure that powers our products and decision-making. You’ll play a key role in shaping how data flows across the organisation, from ingestion and processing to analytics and insights. You’ll collaborate with deve

DRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets around the world. We value autonomy and the ability to quickly pivot to capture opportunities, so we operate using our own capital and trading a

Job Description Behind every investment is a person with ambitions, motivations and values. While we know that every client is unique, they come to J.P. Morgan Personal Investing for the same reason: our straightforward and transparent approach to investing, and the trust that 150 years of J.P. Morg

TalentCo are delighted to be partnering with an established PE-backed tech company looking to hire a high-calibre Lead Software Engineer into their UK HQ just north of London, as they build a new conversational AI platform from the ground up. This hire will be based predominantly from home, spending

Software Engineer (Python / React) Location: London (Hybrid) Experience: 1-5 Years Sector: Elite FinTech Firm Compensation: Up to £140,000 Base Industry Leading Bonus Comprehensive Package A leading FinTech firm in London is seeking a talented Software Engineer to join its growing technology team. T

Software Engineer – Python, SQL, DevOps £100K - £120K + Bonus + Bens Bermudian Reinsurer is looking for an Engineer to join their team in London. This is a small that builds tooling, infrastructure and data pipelines for underwriters whilst developing business applications and reports for finance an

Senior Software Engineer – AI Startup – Up to 160k 🚀🧠 💰 Salary: £70,000 - £160,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 2/3 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client

Please submit your CV in English and indicate your level of English proficiency. Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation isproject-based, not permanent employment. What This

For over 20 years, Global Relay has set the standard in enterprise information archiving with industry-leading cloud archiving, surveillance, eDiscovery, and analytics solutions. We securely capture and preserve the communications data of the world’s most highly regulated firms, giving them greater

Principal Software Engineer | Front End (React) | London, Hybrid Our client is a forward-thinking global firm redefining the future of finance through technology. They are looking for a Principal React Engineer who can set the technical direction for the front-end, champion best practices, and still

C/C Software Engineer - Core Dev Salary: up to £200k base bonus Summary Leading global HFT firm is looking for a pragmatic C/C Engineer to join the Core Development team. Despite serving as the hub for managing the substantial operations across the UK, Europe and the Middle East, the London office r

About the role We’re a new team operating with startup urgency to create new customer growth. Expect end‑to‑end ownership—rapid experimentation, fast shipping, and leaning in wherever the work takes you, beyond your job title. If you’re ambitious, hard‑working, and excited to build 0→1 against tall

SGI

£9,167 - £10,833 /year

Principal Software Engineer | Python, AWS | London, Hybrid Our client is a global investment manager with a strong footprint across major financial centres. They manage multi-asset, commodities, and derivatives strategies for institutional and wholesale clients worldwide. The environment combines th

Job Description J.P.MorganChase is seeking a Lead Software Engineer with expertise in AWS and Python, and a passion for Machine Learning, to help engineer and deploy innovative ML solutions into production. You will collaborate with the Applied AI/ML group and technology teams across the firm, contr

Job Description We have an opportunity to impact your career and provide an adventure where you can push the limits of what's possible. As a Lead Software Engineer at JPMorgan Chase within the Corporate Technology - Corporate Oversight & Governance group, you are an integral part of an agile tea

Are you a world-class Python engineer ready to push your technical limits in one of the most intellectually rigorous environments in finance? Our client is a leading quantitative investment fund—combining deep research, cutting-edge data science, and sophisticated trading systems to deliver exceptio

Software Engineer (Python) - Beacon Core Engineer {"description": " Job Summary: We are seeking a skilled and motivated Senior Software Engineer to join our dynamic team at CWAN. The role joins our Beacon Core Engineering team. The Core team develops large part of Beacon Cloud, just above the Platfo

Role: Software Engineer Location: London (Hybrid / Flexible Working) Salary: £120,000 per annum + Benefits Overview We’re supporting a rapidly growing, innovation-led tech company in London that’s building advanced AI-driven solutions with real-world impact. As they continue to scale, they’re lookin

eFinancialCareers

Location: On-site London, 5 days per week Summary: My client is a world-class prop trading firm looking for a Python Software Engineer to join a global multi-asset trading team. This role offers the unique opportunity to influence the design and architecture of expanding trading systems and tooling,

*Python Software Engineer | £80 - £90** We're working with a leading global investment banking powerhouse on this exciting opportunity. You will join their Equity Linked Technology team to revolutionize front-to-back automation for a multi-billion dollar Structured Notes business. This is a high-imp