Senior Software Engineer

Talantir; France; Remote; EUR 143,000 - 214,000; Full time

Benefits offered by this job

Health & Retirement

Remote-first (US or EU)

MacBook Pro provided

Travel reimbursement

Job summary

MLabs Ltd is seeking a Senior Software Engineer to design, develop, and scale backend services for a high-performance platform. You will own critical projects from APIs to databases, collaborating with product and security to turn complex requirements into production-ready systems.

Requirements include 8+ years in backend software engineering in fintech/blockchain, TS expertise, and experience with AWS, databases, and secure SDLC practices. Remote-first role with US/EU options and travel support.

Qualifications

• 8+ years of backend software engineering in fintech/blockchain
• Strong TypeScript expertise; proficiency in Rust/Go/C++
• Experience building scalable APIs, infrastructure, and developer tools
• Databases: PostgreSQL, DynamoDB, NoSQL; AWS services
• CI/CD, observability, SSDLC, and secure coding practices
• Security knowledge: cryptography basics, PKI, backend security fundamentals
• Strong problem-solving, clear communication under pressure

Responsibilities

• Design, build, and maintain secure, scalable backend services and RESTful APIs
• Architect databases and microservices for performance and reliability
• Own the full SDLC from requirements to production deployment
• Troubleshoot performance bottlenecks and ensure system resilience
• Contribute to CI/CD pipelines and development standards
• Collaborate with product and security on technical roadmaps
• Maintain comprehensive system documentation and client discussions

Skills

Backend expertise

Problem solving

Clear communication

Tools

TypeScript

Rust

Go

C++

PostgreSQL

DynamoDB

NoSQL

AWS

Job description

Location: US or EU (remote-first, office optional). Must be in the US, not Canada or in the European Union. France or Paris or as close as possible, always preferred.

Remote | Full-timeCompensation: $160K - $240K

Our client is an industry-leading organization comprised of experts in blockchain technology, cryptography, infrastructure, and security. The organization is currently developing the foundational wallet infrastructure for the next generation of global finance.

The Senior Software Engineer will design, develop, and scale core backend services for a high-performance platform. This role involves full ownership of critical projects—ranging from APIs and microservices to databases and developer tooling—ensuring all systems remain fast, reliable, and secure. Beyond hands‑on engineering, this individual will contribute to architectural decisions, refine development processes, and ensure infrastructure resilience under real‑world financial workloads. This position requires close collaboration with product, security, and leadership teams to transform complex requirements into elegant, production‑ready systems.

Key Responsibilities

• System Development: Design, build, and maintain secure, scalable backend services and RESTful APIs
• Architecture: Architect databases and microservices optimized for performance, reliability, and long-term growth
• Project Ownership: Manage the full software development lifecycle (SDLC), from initial requirements and implementation to production deployment and iteration
• Performance Optimization: Troubleshoot complex technical issues, resolve performance bottlenecks, and ensure system resilience
• Engineering Excellence: Contribute to CI/CD pipelines, observability, and the continuous improvement of development standards
• Cross‑Functional Collaboration: Partner with product and security teams on technical roadmaps and strategic direction
• Documentation: Maintain comprehensive system documentation and support client‑facing technical discussions

Requirements

• Experience: 8+ years of backend software engineering experience, specifically within the fintech or blockchain sectors
• Technical Proficiency: Strong expertise in TypeScript, complemented by proficiency in at least one low-level language such as Rust, Go, or C++
• Infrastructure: Proven track record of building scalable APIs, infrastructure, and developer tools
• Data & Cloud: Expert-level knowledge of databases (PostgreSQL, DynamoDB, NoSQL) and AWS services
• Best Practices: Skilled in microservices architecture, CI/CD pipelines, observability, and Secure Software Development Lifecycle (SSDLC) practices
• Security Knowledge: Familiarity with applied cryptography, Public Key Infrastructure (PKI), and backend security fundamentals
• Soft Skills: Strong problem‑solving abilities, clear communication skills, and the capacity to deliver high-quality results under pressure

Benefits

• Compensation: Annual salary ranging from $160,000-$240,000
• Equity: 100-200 stock options vested over a 4-year period
• Health & Retirement: Comprehensive healthcare coverage and 401K participation
• Location Flex: Remote-first environment (US or EU based) with optional office access
• Equipment: MacBook Pro and essential home‑office hardware provided
• Travel: Coverage for professional travel expenses

Commitment to Equality and Accessibility

At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job‑advert in an accessible format please let us know at the earliest opportunity by emailing [e-mail]. MLabs Ltd collects and processes the personal information you provide such as your contact details, work history, resume, and other relevant data for recruitment purposes only. This information is managed securely in accordance with MLabs Ltd's Privacy Policy and Information Security Policy, and in compliance with applicable data protection laws. Your data may be shared only with clients and trusted partners where necessary for recruitment purposes. You may request the deletion of your data or withdraw your consent at any time by contacting [e-mail].