Software Engineer

The job

LIVE Employer public job feed (private-sector employer) Source: the employer's public careers feed · Data: listed 2026-10-20

Job description

Responsibilities:

WHAT YOU WILL OWN

• Features end to end: backend, frontend and production

• The on-chain / off-chain architecture of your product: what lives in contracts, what lives in services, and how the two stay consistent. You make these decisions and justify them in writing

• Security and correctness of what you ship: signing flows, interactions with contracts that hold user assets, keys and secrets

• Production operation of your services, as part of the team's on-call rotation

WHAT YOU WILL DO

• Build backend services in Go and TypeScript: chain indexing, transaction relaying, event processing, APIs for dApps and SDKs

• Build infrastructure backend services for tokenizing in-game items and currencies

• Build dApp frontends in React: wallet connection, transaction signing, on-chain state in the UI

• Integrate smart wallets into products: accounts, paymasters, bundlers

• Develop SDKs used by game studios and partners

• Monitor services and contracts in production and take part in on-call

• Review code

• Set up and maintain AI tooling in the repositories (Claude Code, Codex, Cursor: rules, context, harness) so the team uses it effectively

Qualifications & Skills:

Experience

• 5+ years of commercial software development, with senior-level production experience across backend and frontend

• dApps that you shipped to production and maintained

Web3 libraries and wallets

• viem and wagmi in production: clients and transports, contract reads and writes with typed ABIs, event subscriptions, wagmi hooks and connectors, caching and invalidation of on-chain state

• How wallet signers work: EOAs, browser and embedded wallets, smart accounts; personal_sign (EIP-191) and typed data (EIP-712); the EIP-1193 provider; network switching

• Hands-on experience with smart wallets: UserOperations, gas sponsored via paymasters, signature validation for contract accounts (ERC-1271)

Backend

• Go and TypeScript (Node.js) for production services

• Processing on-chain events: idempotency, reorg handling, retries

• Asynchronous messaging and event-driven design (Kafka, RabbitMQ or NATS): delivery guarantees, ordering, reprocessing

• Relational databases (PostgreSQL) and caching (Redis)

• Designing REST and gRPC APIs: versioning, backward compatibility

Frontend

• React and TypeScript: rendering model, state management, performance

• Web security fundamentals: XSS, CSRF, CSP, safe handling of signatures and keys in the browser

Smart contracts

• Reading and understanding Solidity contracts and the EVM (storage, gas, call semantics, proxy upgrade patterns, access control) well enough to integrate with them safely and review changes

• Common contract vulnerability classes (reentrancy, front-running / MEV, oracle manipulation, signature replay) and how they affect the off-chain side

Operations

• Containers and orchestration (Docker, Kubernetes) at the level of deploying and debugging your own services

• Observability (we use Datadog; experience with Prometheus, Grafana, ELK / Graylog or OpenTelemetry also counts): metrics, logs, tracing and alerting for services and contracts; diagnosing incidents in production

Engineering practices

• Testing: unit, integration, E2E

• Git, CI/CD (GitLab CI or similar)

AI-assisted engineering

• Daily hands-on use of AI coding tools (Claude Code, Codex, Cursor) for development and review, including configuring them for a repository

English

• Spoken English at B2 level or higher

Nice to Have:

• zkSync / ZK Stack and the specifics of the zk-rollup stack

• Designing, writing and testing smart contracts in Solidity with Foundry; deploying and upgrading them safely

• Building ERC-4337 infrastructure yourself (bundlers, paymasters); EIP-6963, EIP-5792

• DeFi: DEX and AMM mechanics

• NFTs and marketplaces: ERC-721, ERC-1155, auction mechanics

• L2 infrastructure: running nodes, indexers, bridges

• Designing SDKs for external developers

• Gaming domain experience

How We Work:

How We Hire:

1. Intro call. Your background, your motivation and the role.

2. Technical interview. Built directly on the Responsibilities and Qualifications & Skills sections above. We won't ask about anything this posting doesn't promise.

3. Bar raiser. An engineer from outside the hiring team checks that you raise the overall engineering bar.

Explore around this job

Field: Technology Sub-niche: Software engineering All jobs at Xsolla

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This is a — role in the Technology field (Software engineering) at Xsolla.

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The employer

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FAQ

What is the Software Engineer job at Xsolla?

A private-sector role in technology (software engineering) listed 20 days ago. The full description is on this page and on the employer's page.

Where is this job?

Remote / flexible (United States). A remote or flexible location is listed; confirm with the employer which states are accepted.

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How much does it pay?

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What is the cost of living there?

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How old is this listing?

It was posted on 2026-10-20 (20 days ago). Jobs older than 90 days are not shown.

Are there similar jobs?

Yes: browse software engineering jobs in the United States.

Sources and terms

• Job data: Xsolla careers page public feed (listing dated 2026-10-20). The job disappears from this site when it disappears from the source.
• Wages and projections: BLS OEWS (May 2025) and Employment Projections 2025–35.
• City and county figures: Census Bureau ACS 2020–2024, BEA, BLS QCEW and LAUS, NASA POWER climatology; distances from Census Gazetteer coordinates.

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Sources

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• BLS Employment Projections 2025–35
• BLS Local Area Unemployment Statistics
• BLS JOLTS
• BLS State and Metro Area Employment
• Census Bureau American Community Survey (via Census Reporter)
• BEA GDP by state and Regional Price Parities
• IRS 2026 tax adjustments
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