Contract Development

Contract Development Developer Jobs

6 jobs found

Today

Contract Mobile App Developer

BD&J Remote 🌍 Remote

Remote

Today

$4,000 - $6,000/mo Contract API APIs Contract Development

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Job Description

Contract Mobile App Developer needed to assume ownership of an approximately 50% complete app and drive it through launch on both iOS and Android, then continue maintenance and feature development.

Responsibilities

Take over and get up to speed on an existing mobile app and its codebase
Complete the remaining work required to bring the application to launch
Develop, maintain, and support the app for both iOS and Android
Build and integrate with existing APIs, cloud infrastructure, and third-party integrations
Troubleshoot and resolve bugs and technical issues
Independently manage the technical development of the application as the sole developer
Provide ongoing maintenance, updates, bug fixes, and future feature development after launch

Requirements

Strong experience with React and React Native
Experience developing and launching applications on both iOS and Android
Full-stack development experience
Comfortable taking over an existing codebase and independently working through unfamiliar code
Experience working with APIs and cloud-based infrastructure
Able to work independently with minimal supervision
Experience taking an app from development through launch
Comfortable providing ongoing post-launch maintenance and support

Technologies

React, React Native
Firebase
Google Cloud
Google AI Studio
Microsoft Azure
Google Workspace
GitHub
Cloudflare
Replicate API
Facebook API
PayPal API

Compensation & Contract Details

Location: Remote
Job type: Contract
Salary range: USD 4,000 - 6,000 per monthly
Compensation structure: open to discussion
Flexible on format: open to an hourly rate or a monthly contract arrangement depending on experience and proposed approach

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1mo ago

Contract Software Engineer - AI Trainer

DataAnnotation San Francisco, CA 🇺🇸 Remote

San Francisco, CA

1mo ago Closed

$50 - $100/hr Contract Ai Trainer Artificial Intelligence Contract Development

This position is no longer accepting applications (closed Jul 27, 2026).

Job Description

DataAnnotation is seeking a Contract Software Engineer with a focus on AI training. In this fully remote, project-based role, you will design and solve programming challenges used to teach AI systems, craft clear code snippets with thorough explanations, and assess AI-produced code for quality and performance. The position offers flexible scheduling and the option to work from your own setup across multiple projects.

Responsibilities

Design and solve a range of programming challenges used to train AI systems.
Write concise, high-quality code snippets accompanied by detailed explanations.
Evaluate AI-generated code for correctness, efficiency, and readability.
Provide feedback that helps steer the next generation of AI models.

Requirements

Fluency in English at native or bilingual level.
Proficiency in at least one of the following languages or frameworks: JavaScript, TypeScript, Python, C, C#, C++, React, Go, Java, Kotlin, or Swift.
Strong writing and grammar skills.
A bachelor's degree (completed or in progress).
Prior experience as a Software Developer, Coder, Software Engineer, or Programmer is preferred.

Technologies

JavaScript
TypeScript
Python
C
C#
C++
React
Go
Java
Kotlin
Swift

Benefits

Fully remote: work from anywhere in the US, Canada, UK, Ireland, Australia, and New Zealand.
Flexible schedule: select projects and hours, using your own computer from home.
Competitive pay: hourly rates up to 100+ USD, with opportunities for higher bonus rates on certain projects.
Impact: help shape the future of AI technologies.

Advantages of contracting with us

Fully remote: work from anywhere in the US, Canada, UK, Ireland, Australia, and New Zealand.
Flexible schedule: choose projects and when you work, on your own computer from home.
Competitive pay: hourly projects up to 100+ USD, with potential for higher bonus rates on select assignments.
Impact: contribute to the progression of AI technologies.

Note

Payment is processed via PayPal. We will not request money from you. PayPal handles currency conversions from USD. This role is available to residents of the US, Canada, UK, Ireland, Australia, and New Zealand; applicants outside these regions will not see opportunities on our site at this time.

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2mo ago

AxiomSL Developer - Contractor

System One Farmers Branch, TX

Farmers Branch, TX

2mo ago Closed

Contract Backend Developer Axiom Contract Development

This position is no longer accepting applications (closed Jun 22, 2026).

Job Description

System One is seeking an on-site AxiomSL Developer contractor for a 12-month engagement in Farmers Branch, Texas. The role centers on configuring regulatory reports in AxiomSL, testing and onboarding patches, and performing database development tasks as part of a broader regulatory reporting initiative.

Contract Details

Location: Farmers Branch, TX (onsite)
Job Type: Contract
Minimum Experience: 6 years

Responsibilities

Configure regulatory reports within the AxiomSL platform
Test and onboard patches in AxiomSL to ensure stability and compliance
Modify existing databases and database management systems
Write and code logical and physical database descriptions and specify database identifiers to the management system or guide others in coding descriptions
Collaborate with a project team to coordinate database development and define project scope and constraints
Review project requests detailing database user needs to estimate time and cost required to complete the work
Perform other duties as assigned

Requirements

AxiomSL experience, specifically this version of Axiom, with a minimum of 6 years
Oracle PLSQL

Technologies

AxiomSL
Oracle PLSQL
Informatica
Unix

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2mo ago

Smart Contract Developer Multi-Chain

Meta Elements Inc. Remote 🌍 Remote

Remote

2mo ago Closed

$98k - $118k/yr Full time Blockchain Contract Development Ethereum

This position is no longer accepting applications (closed Jun 21, 2026).

Job Description

This remote role focuses on building fast-moving cross-chain DeFi and NFT primitives across Ethereum, L2s, and Solana. You will ship secure, production-ready contracts, integrate them with modern frontends, audit for exploits, and stay plugged into evolving crypto trends. The position comes with strong benefits: 100% remote work freedom, a generous token allocation with ecosystem airdrop eligibility, unlimited vacation, high-spec hardware delivered to your door, and regular all-expenses-paid team retreats. This is a fast-paced, autonomous environment where your contributions directly shape the protocol and community.

Responsibilities

Ship secure, battle-tested smart contracts on Ethereum/L2s (Solidity) and Solana (Rust) to support evolving product roadmaps.
Connect contracts directly to user interfaces using Web3.js, @solana/web3.js, and modern wallet adapters.
Actively audit code to prevent exploits, front-running, and optimize gas and compute units under high traffic.
Move quickly, push code to GitHub multiple times daily, and iterate on features based on real-time community feedback.
Stay connected with crypto Twitter, governance forums, and Discord to spot new trends, primitives, and security updates to adopt.

Requirements

Hands-on experience deploying at least one smart contract to a live public testnet or mainnet, with verified contract links to share.
Comfort navigating both EVM (Solidity) and Solana (Rust) environments, recognizing the differences in architecture.
Solid command of TypeScript or JavaScript for scripts, automation, and basic frontend-to-contract integrations.
Self-starter with a deep passion for crypto, decentralized finance, non-fungible tokens, or decentralized infrastructure networks.
Ability to work autonomously in a fast-paced setting where priorities shift based on market trends and community needs.

Technologies

Solidity
Rust
Ethereum
Solana
Web3.js
@solana/web3.js
TypeScript
JavaScript
GitHub

Benefits

Generous token allocation and ecosystem airdrop eligibility, providing direct financial upside in the protocol you build.
100% remote work freedom to work from anywhere while staying responsive on Discord and meeting sprint deadlines.
Unlimited vacation policy, allowing time off whenever needed without questions.
High-spec hardware, including the latest MacBook Pro or equivalent, delivered to you.
All-expenses-paid team retreats in tropical locations to bond, brainstorm upgrades, and celebrate launches.

Compensation

USD 98,388.89 – 118,489.85 per year

Work Location

Remote

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2mo ago

Blockchain Developer _ Digital Assets

Tata Consultancy Services Charlotte, NC

Charlotte, NC

2mo ago Closed

$110k - $125k/yr Full time Backend Developer Asset Custody Blockchain

This position is no longer accepting applications (closed Jun 18, 2026).

Job Description

The Blockchain Developer for Digital Assets at Tata Consultancy Services in Charlotte, NC is responsible for designing, developing, and maintaining blockchain solutions for asset issuance, transfer, and lifecycle management. The role includes building and auditing smart contracts, integrating wallets and key-management systems, and ensuring secure asset operations, with a focus on security, governance, interoperability, and ongoing platform improvements.

Responsibilities

Design, develop, and maintain blockchain-based applications for digital asset issuance, transfer, and lifecycle management.
Build and audit smart contracts (Solidity, Rust) with a strong emphasis on security, gas efficiency, and upgradeability.
Integrate wallets, custody platforms, and key-management systems (HSM/MPC) for secure asset operations.
Implement token standards and protocols (fungible and non-fungible) aligned to business and regulatory requirements.
Develop backend services and APIs for on-chain and off-chain synchronization, transaction orchestration, and reconciliation.
Establish monitoring for node health, transaction status, chain events, and anomalous activity detection.
Conduct threat modeling, vulnerability remediation, and secure SDLC practices for blockchain components.
Collaborate with product, legal, compliance, and risk teams on digital asset controls, approvals, and governance.
Optimize performance and reliability across testnet and mainnet environments, including rollback and incident playbooks.
Support interoperability with exchanges, bridges, and third-party blockchain infrastructure providers.
Maintain technical documentation such as architecture, smart contract specifications, runbooks, and release notes.
Stay current on protocol upgrades, EIPs, and ecosystem changes to drive continuous platform improvement.

Requirements

Blockchain Developer
Digital Assets
Agile concepts
CI/CD
10+ years’ experience

Technologies

Solidity
Rust
HSM
MPC

Benefits

Discretionary Annual Incentive
Comprehensive Medical Coverage: Medical & Health, Dental & Vision, Disability Planning & Insurance, Pet Insurance Plans
Family Support: Maternal & Parental Leaves
Insurance Options: Auto & Home Insurance, Identity Theft Protection
Convenience & Professional Growth: Commuter Benefits & Certification & Training Reimbursement
Time Off: Vacation, Time Off, Sick Leave & Holidays
Legal & Financial Assistance: Legal Assistance, 401K Plan, Performance Bonus, College Fund, Student Loan Refinancing

Location

Charlotte, NC

Job Function

Technology

Role

Technical Architect

Job ID

412660

Desired Skills

Agile

Salary Range

$110,000-$125,000 a year

Desired Candidate Profile

Qualifications: Bachelor of Computer Science

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3mo ago

Contract Mobile App Developer - AI Trainer

DataAnnotation Merrifield, VA 🇺🇸 Remote

Merrifield, VA

3mo ago Closed

$40 - $60/hr Contract Artificial Intelligence Contract Development Independent Contractor

This position is no longer accepting applications (closed May 22, 2026).

Job Description

Contract Mobile App Developer - AI Trainer is a remote role based in Merrifield, Virginia, focused on crafting and solving coding exercises to train AI systems and contribute to AI development.

Responsibilities

Design and tackle a diverse set of coding problems used to train AI models.
Produce clean, well explained code snippets along with detailed explanations.
Evaluate AI generated code for correctness, performance, and readability.
Provide targeted feedback that informs the next iteration of AI models.

Requirements

Fluent English communication at native or bilingual level.
Proficiency in at least one of the following languages or frameworks: JavaScript, TypeScript, Python, C, C#, C++, React, Go, Java, Kotlin, or Swift.
Excellent writing and grammar skills.
Bachelor’s degree, completed or in progress.

Technologies

JavaScript
TypeScript
Python
C
C#
C++
React
Go
Java
Kotlin
Swift

Benefits

Fully remote work from anywhere in the US, Canada, UK, Ireland, Australia, and New Zealand.
Flexible scheduling to choose projects and working hours.
Competitive hourly pay, ranging from $40 to $60 per hour, with higher rates possible for strong performers.
Opportunity to influence the development of AI technologies.

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Contract Development Developer Jobs

Contract Mobile App Developer

Contract Software Engineer - AI Trainer

AxiomSL Developer - Contractor

Smart Contract Developer Multi-Chain

Blockchain Developer _ Digital Assets

Contract Mobile App Developer - AI Trainer

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