Software Development Engineer III

capgroup; Greater London; On-site; GBP 120,000 - 180,000; Full time

Job summary

Capital is seeking a Senior Software Engineer to join its AI initiatives in London. You will partner with business teams to translate ambiguous problems into production-ready generative AI solutions that improve investment processes and business outcomes.

You will design end-to-end retrieval-augmented pipelines, build agents and workflows, and ensure secure, auditable deployments. This hands-on role requires strong Python skills and a track record of production systems.

Qualifications

• 10+ years of professional software engineering experience.
• Strong proficiency in Python (or a comparable modern language).
• Hands-on production experience.

Responsibilities

• Partner directly with business partners to understand workflows and translate needs into technical specifications.
• Design, build, and operate production generative AI applications such as copilots, assistants, and knowledge-search experiences.
• Architect end-to-end retrieval-augmented generation pipelines with embeddings, vector storage, and prompt management.
• Build agents and agentic workflows that plan and execute multi-step tasks with auditable guardrails.
• Practice eval-driven development with acceptance criteria, evaluation harnesses, and measurable quality metrics.
• Take end-to-end ownership from discovery to production, with observability, cost tracking, and audit trails.
• Apply AI cost-optimization practices to keep solutions cost-effective as they scale.

Skills

Python

Hands-on production experience

Job description

"I can be myself at work."

You are more than a job title. We want you to feel comfortable doing great work and bringing your best, authentic self to everything you do. We value your talents, traditions, and uniqueness-and we're committed to fostering a strong sense of belonging in a respectful workplace.

We intentionally seek diverse perspectives, experiences, and backgrounds, investing in a culture designed to celebrate differences. We believe that belonging leads to better outcomes and a stronger community of associates united by our mission. At Capital, we live our core values every day: Integrity, Client Focus, Diverse Perspectives, Long-Term Thinking, and Community.

"I can influence my income."

You want to feel recognized at work. Your performance will be reviewed annually, and your compensation will be designed to motivate and reward the value that you provide. You'll receive a competitive salary, bonuses and benefits. Your company-funded retirement contribution will factor in salary and variable pay, including bonuses.

"I can lead a full life."

You bring unique goals and interests to your job and your life. Whether you're raising a family, you're passionate about where you volunteer, or you want to explore different career paths, we'll give you the resources that can set you up for success. Enjoy generous time-away and health benefits from day one, with the opportunity for flexible work options

Receive 2-for-1 matching gifts for your charitable contributions and the opportunity to secure annual grants for the organizations you love

Access on-demand professional development resources that allow you to hone existing skills and learn new ones

Software Engineer - Senior

As a Software Engineer - Senior, you partner with business partners to turn ambiguous problems into working AI solutions that improve our investment process and business outcomes. You are the build-and-deploy bridge between the people who own the problem and the AI platform that powers the answer: you lead discovery, design the approach, write the code, and own it in production. This is a hands‑on engineering role for someone who is as comfortable in a working session with a business team as they are building a retrieval pipeline or hardening an agent. You will help set the standard for how generative AI gets built and operated responsibly at scale across the firm.

You will:

• Partner directly with business partners to understand their workflows, scope the highest-value opportunities, and translate ambiguous needs into clear technical specifications.
• Design, build, and operate production generative AI applications such as copilots, assistants, knowledge-search experiences, and agentic workflows, as reliable, production-grade systems rather than demos.
• Architect and implement end-to-end retrieval-augmented generation pipelines, including parsing, ingestion, chunking strategy, embeddings, vector storage, retrieval, and prompt management.
• Build agents and agentic workflows that plan and execute multi-step tasks within explicit, auditable boundaries, with guardrails that keep behavior safe and predictable.
• Practice eval-driven development: define acceptance criteria up front, build evaluation harnesses, and measure correctness, latency, and hallucination so quality is verifiable and regressions are caught before production.
• Take end-to-end ownership from discovery and design through build, rollout, and operational excellence. Instrument systems with the observability, cost tracking, and audit trails needed to know when they degrade.
• Apply FinOps and cost-optimization practices to AI workloads, tracking and managing token, inference, and infrastructure spend so solutions stay cost effective as they scale.
• Integrate AI solutions with enterprise data systems, APIs, and MLOps / LLMOps tooling, applying sound system design and distributed- systems judgment.
• Apply responsible-AI judgment proportionate to the risk of each use case, working with risk and compliance partners to build the controls, human-oversight patterns, and audit trails that let the firm move quickly and safely.
• Embed security, privacy, and compliance controls into the systems you build, including identity and access management (IAM), encryption, and audit logging. Partner with InfoSec and data-governance teams to meet regulatory and internal-policy requirements such as SOC 2 and applicable data-privacy regulations.
• Codify what works into reusable tools, patterns, and playbooks, and feed insights back to platform, product, and engineering partners so the whole organization gets faster.
• Produce clear documentation, runbooks, and architectural diagrams so others can understand, operate, and extend the systems you build.
• Demonstrate the ability to be a full stack engineer across development environments.

Required qualifications:

• 10+ years of professional software engineering experience, with strong proficiency in Python (or a comparable modern language).
• Hands-on production experience