Senior Full Stack Developer | Tech Lead

About Welcome Finance

Welcome Finance is a London-based FinTech empowering UK businesses to access tailored credit products through our platform, which integrates seamlessly into the UK lending ecosystem to deliver real-time, personalized credit offers.

We operate with a globally distributed, high-velocity team defined by extreme ownership, zero bureaucracy, and a hands-on 'learn by doing' culture.

Role Overview

We are seeking a passionate Tech Lead to take complete ownership of the tech powering our loan comparison platform. In this role, you will architect a scalable and secure backend, manage cloud infrastructure, and directly contribute critical code while building and guiding a distributed engineering team. You will work closely with our Product Manager and executive team to turn business strategy into high-impact engineering solutions.

Key Responsibilities

• Backend Architecture & Development: Architect and implement maintainable, testable, and scalable backend systems and APIs using Java, Python, and modern frameworks.
• Infrastructure & DevOps: Design, secure, and manage a highly available AWS cloud environment using Docker, Kubernetes/Docker Swarm, Ansible, and automated CI/CD pipelines.
• Database & Data Pipelines: Build efficient MongoDB/Mongoose schemas and manage data flow across core platform services.
• System Security & Performance: Manage Linux/Ubuntu hosts, implement strict security measures (IAM roles/permissions), and ensure high system uptime and low latency.
• Integrations: Build and maintain reliable third-party API integrations, working closely with front-end engineers to ensure clean data consumption.
• Engineering Leadership: Lead code reviews, delegate tasks, shape engineering workflows, and actively participate in hiring talent for our growing team.

What We Look For

Core Requirements:

• 8+ years of backend engineering experience in high-volume, data-intensive tech environments (ideally in credit, lending, or fintech).
• 5+ years of hands-on experience with Amazon Web Services (AWS).
• Deep proficiency in Java, Spring Boot, RESTful APIs, Microservices, Next.js, React, TypeScript and Node.js, Data Structures, and Algorithms.
• Strong track record of designing, deploying, and optimizing resilient, high-performance distributed systems.
• Practical experience with Linux system administration, database performance tuning (MongoDB), PostgreSQL(schema design, migrations, query optimisation), caching, and asynchronous/event-driven processing.
• Uses AI coding tools (Claude, Cursor, GitHub Copilot) responsibly, reviewing and testing every change.

Preferred:

• Exposure to Docker, Kubernetes, and event-driven architectures.
• Hands-on experience within high-throughput transactional domains (fintech, payments, lending).

Mindset & Soft Skills:

• Entrepreneurial & Scrappy: You thrive in fast-paced environments, love rolling up your sleeves, and care deeply about how your code directly impacts business outcomes.
• Collaborative Leader: Experienced in managing distributed teams in a multicultural setting with clear, transparent communication.
• On-Site Energy: Excited to work from our office 5 days a week to collaborate directly with the core team.

Position Details & Benefits

• Location: Prime office location in West Delhi (5 days a week in-office).
• Compensation: Competitive base salary
• Perks: 20 paid annual holidays, monthly team events, and an environment with zero red tape.