Principal Engineer

Funding Xchange

Principal Engineer at a B2B Fintech focusing on small business lending market. Guiding technical direction and mentoring engineers while collaborating with stakeholders.

Posted 6/20/2026full-timeLondon • 🇬🇧 United KingdomLead💰 £120,000 - £140,000 per yearWebsite

Tech Stack

Tools & technologies

JavaJavaScriptKotlinMongoDBNoSQLPostgresReactSpringSQL

About the role

Key responsibilities & impact

Identifying the right problems to solve, focusing on commercial value, pragmatic and meaningful outcomes
Engaging with future and existing customers and partners to gather the right information to build and then communicate better understanding for the problems we need to be solving
Own the exploration and documentation of strategy through engagement with wide range of internal and external stakeholders
Designing and building robust platform functionality, including developer-friendly APIs, domain and data modelling and integrations
Setting a high bar for collaboration, communication, and sound decision making
Leading architecture discussions, being the voice of experience helping the team balance flexibility, expediency and scalability
Collaborating closely with Product Managers and Engineers to explore and optimise potential solutions collaboratively
Helping grow the teams by aiding recruiting efforts for hiring engineers as we expand

Requirements

What you’ll need

At least 2 years contiguously working as a Principal Engineer, Architect or equivalent
Solid technical background with experience designing and large-scale engineering systems
Comfortable with ambiguity and adept at working with stakeholders across a range of technical and non-technical disciplines
Deep understanding of translating product and business goals into great tech
Experience across the stack with technologies such as Coding languages like Java, Javascript, Kotlin, SQL and NoSQL Databases e.g. Postgres and MongoDB
Knowledge of common development frameworks and tools, e.g. React, Spring, Temporal
Experience identifying cross-cutting problems, proposing solutions, and driving adoption of those solutions across teams with their priorities
Experience with SaaS in the FinTech industry and appreciate the associated data management and governance considerations
Care deeply about mentoring and growing engineers, and senior engineers feel that they have lots to learn from you
Excellent written and verbal communication skills and a bias toward open, transparent cultural practices
Strong interest in product and infrastructure design

Benefits

Comp & perks

Flexible working
Employee assistance and wellbeing support
Auto-enrolment in the pension scheme with contributions from FXE
Virtual GP
25 days annual leave PLUS UK Bank Holidays
Life Assurance – 4 x your base salary should the worst happen
Talent Referral Scheme
Will writing service
Discounts with selected partners such as ASOS, Amazon, Tesco and more
Regular socials and team get togethers

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaJavaScriptKotlinSQLNoSQLPostgresMongoDBReactSpringTemporal

Soft Skills

collaborationcommunicationdecision makingmentoringproblem solvingstakeholder engagementadaptabilitytransparencyleadershipteam building