Engineering
Implementation Engineer (London)
11 Feb 2026
About the role
We are looking for an Implementation Engineer to lead client onboarding, data integration, and end-to-end delivery of our platform. This is a hybrid role combining client-facing consulting, data engineering, and solution design. You will work directly with insurers and brokers to understand their data, processes, and payment flows, often in more detail than they do themselves, and translate that into a robust, scalable solution on the Diesta platform.
You will own onboarding projects from discovery to go-live, build ingestion and reconciliation workflows tailored to each client, and work cross-functionally with Product and Engineering to refine and improve the overall onboarding experience.
Key Responsibilities
Client Discovery & Requirements
Lead technical discovery sessions with clients to map out data sources, payment flows, and reconciliation processes.
Uncover edge cases, undocumented logic, and operational nuances.
Translate business and operational requirements into clear technical specifications.
Data Analysis & Integration
Analyse complex client datasets (Excel, CSV, PDFs, bank feeds) and identify required transformations.
Design and implement data mappings, validation checks, and ingestion workflows.
Convert messy or inconsistent data into clean formats aligned with the Diesta schema.
Solution Design & Delivery
Architect and configure client-specific ingestion, matching, and reconciliation rules.
Build proof-of-concept integrations to demonstrate platform value early in onboarding.
Execute full implementation cycles, including testing, troubleshooting, and documentation.
Client Communication & Success
Serve as the main technical point of contact throughout onboarding.
Provide clear explanations to technical and non-technical stakeholders.
Build trust with clients by delivering reliable, well-structured solutions.
Platform & Process Improvement
Identify common onboarding patterns and contribute to reusable templates and tooling.
Collaborate with Product and Engineering to enhance platform capabilities.
Help streamline and standardise the onboarding process across clients.
What we're looking for
Core Skills
Strong analytical mindset with the ability to understand complex operational workflows.
Experience working with data formats such as CSV, Excel, SQL databases, and APIs.
Proficiency in SQL (MySQL preferred) and scripting languages like Python.
Ability to diagnose and resolve data quality, transformation, and mapping issues.
Comfortable leading client discussions and extracting requirements from ambiguity.
Nice-to-Haves
Background in fintech, insurance, reconciliation, or payments.
Experience in implementation engineering, solutions engineering, or technical consulting.
Familiarity with AWS, ETL pipelines, fuzzy matching logic, or financial data models.
Personal Traits
High ownership and accountability.
Ability to communicate clearly and confidently.
Comfortable in fast-moving, unstructured startup environments.
Curious, pragmatic problem solver with strong attention to detail.
Our Expectations
Within the first 30 days
Gain a deep understanding of Diesta’s platform, data models, and reconciliation logic.
Shadow client onboarding sessions and begin analysing example client files.
Deliver a small proof-of-concept ingestion or mapping task.
Within the first 60 days
Own end-to-end onboarding tasks with support from senior team members.
Lead your first client discovery call, capturing requirements and data structures.
Build and test ingestion workflows, normalisation logic, and validation checks.
Within the first 90 days
Take ownership of a full onboarding workstream from discovery to implementation.
Proactively identify improvements to onboarding processes and platform capabilities.
Become a trusted contributor to client-facing delivery and internal engineering discussions.
Why join Diesta?
Join a mission-driven team addressing real pain points in insurance finance.
Be part of a lean, high-performing team with direct impact on product and client outcomes.
Work with top insurers and brokers in an industry ripe for disruption.
A culture of high trust, low ego: we value competence, commitment, and transparency.
Benefits
Hybrid work model with a central London office (Bank / Liverpool Street)
Private healthcare insurance
Regular team lunches and international offsites
State-of-the-art technical equipment
22 days annual leave (excluding bank holidays)
Interview Process
Intro Call with our Chief of Staff to explore your background and aspirations.
Technical Interview with the Data Lead
Onsite Workshop at our London office, collaborate with the team and experience our culture first-hand.
Interested in leading a growing team and shaping the future of client success in insurance finance? Apply now to join Diesta by emailing recruitment@diesta.co.uk
A new level of premium processing
Diesta Limited (Company Number: 13969906, Firm Reference Number: 1012426) is an agent of Plaid Financial Ltd. (Company Number: 11103959, Firm Reference Number: 804718), an authorised payment institution regulated by the Financial Conduct Authority under the Payment Services Regulations 2017. Plaid provides you with regulated account information services through Diesta as its agent.
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