Solidity Jobs

About Tesser:

Modern payments infrastructure for banks and fintechs. We replace slow, expensive legacy rails with stablecoin-based settlement; enabling faster transfers, lower costs, and real-time money movement without sacrificing security or compliance.

Senior Engineer

We’re seeking a founding, full-stack engineer to join our early stage team. Reporting to the Head of Engineering, you will help design and build secure, scalable payments infrastructure from the ground up.

This is a largely greenfield environment with no legacy systems to maintain. In your role, you will work across services that move real money in real time and help shape both the technical architecture and the product roadmap as we scale. The problems are high throughput, security critical, and deeply systems oriented.

Our core stack today is TypeScript and AWS. We expect to add Python, Rust, and Solidity as the platform grows

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Responsibilities include:

• Architect & Generalize Payment Rails Lead the transition from a single-chain MVP to a modular, multi-chain infrastructure. You will design the abstractions required to integrate new blockchains and liquidity providers without re-writing core logic.
• Build for Financial Atomic Consistency Own the end-to-end lifecycle of transactions moving real money. You will implement idempotent processing, complex SQS event-driven workflows, and database constraints in Supabase to ensure 100% accuracy and zero double-spends.
• Establish the Engineering "Gold Standard" As a founding hire, you define the culture of the codebase. You’ll set the benchmarks for TypeScript patterns, testing coverage, and CI/CD automation that will serve as the blueprint for all future engineering hires.
• Security-First Systems Design Partner with the Head of Engineering to harden our Zuplo/ECS stack. You will be responsible for implementing secure API design, rigorous authentication flows, and preparing the infrastructure for institutional-grade security audits.
• Strategic Tech Stack Evolution Identify high-leverage opportunities to evolve our stack. You will lead the research and prototyping for moving performance-critical paths into Rust and developing on-chain logic via Solidity as the platform scales.
• Co-Pilot the Product Roadmap Act as a technical partner to the business. You aren't just "building features"; you are evaluating the technical trade-offs of the roadmap, spotting edge cases early, and ensuring our product goals align with our architectural capabilities.

About You

• You’re hands-on and independent. You want to ship real things and avoid bloated org charts
• and endless meetings.
• You’ve designed and deployed distributed systems for 6+ years.
• You work well without needing direction.
• You’re curious about how money moves and the future of finance.
• You might come from a deep Web2 background and want in on Web3. Or maybe you already
• have deep DeFi experience and are looking for true product market fit and not more gamble-fi.

Technical Experience We Are Looking For

You do not need experience with everything below, but you should be comfortable operating in this type of environment:.

• Frameworks: NestJS, Next.js
• Infrastructure: AWS, Terraform, Kubernetes, ECS, Kafka, SQS, Istio, Supabase, Sentry, QuickNode, Basis Theory, Zuplo
• Wallets and Auth: Turnkey, Circle, Auth0, Dynamic, TEE, MPC, Dfns, Utila, Privy, OIDC, OAuth
• Blockchains: EVM, Stellar, Solana
• Concepts: Microservices, event driven systems, cloud native architecture, state machines, event sourcing, encryption, security, high frequency systems
• Languages: TypeScript, Python, Rust, Solidity
• Bonus: Experience in payments, financial infrastructure, or stablecoins

What We Offer

• Competitive Compensation, benefits & material equity